Answer:
The pH of the solution is 7Explanation:
The pH is a measure of the acidity of the solutions. It is defined as the negative logarithm of the molar concentration of hydrogen ions (H⁺).
pH = - log [H⁺]The hydrogen ion concentration of this solution is 1 × 10⁻⁷ M.
Hence:
pH = - log (1 × 10⁻⁷) = - (-7) = 7This pH corresponds to a neutral solution (neither acid nor alkaline).
You should remember this relation bwtween pH and acidity/alkaliinity:
Low pH (0.0 or close) corresponds to strong acidsHIgh pH (14.0 or close) corresponds to strong basesAcids have pH between 0.0 and 7.0Bases have pH between 7.0 and 14.0A 15.00-ml sample of a naoh solution of unknown concentration requires 17.88 ml of a 0.1053 m h2so4 solution to reach the equivalence point in a titration. What is the concentration of the naoh solution?
Answer:
0.1255 MExplanation:
1) Data:
Base: NaOH
Vb = 15.00 ml = 15.00 / 1,000 liter
Mb = ?
Acid: H₂SO₄
Va = 17.88 ml = 17.88 / 1,000 liter
Ma = 0.1053
2) Chemical reaction:
The titration is an acid-base (neutralization) reaction to yield a salt and water:
Acid + Base → Salt + WaterH₂SO₄ (aq) + NaOH(aq) → Na₂SO₄ (aq) + H₂O (l)3) Balanced chemical equation:
H₂SO₄ (aq) + 2 NaOH(aq) → Na₂SO₄ (aq) + 2H₂O (l)Placing coefficient 2 in front of NaOH and H₂O balances the equation
4) Stoichiometric mole ratio:
The coefficients of the balanced chemical equation show that 1 mole of H₂SO₄ react with 2 moles of NaOH. Hence, the mole ratio is:
1 mole H₂SO₄ : 2 mole NaOH5) Calculations:
a) Molarity formula: M = n / V (in liter)
⇒ n = M × V
b) Nunber of moles of acid:
nₐ = Ma × Va = 0.1053 (17.88 / 1,000)c) Number of moles of base, nb:
nb = Mb × Vb = Mb × (15.00 / 1,000)d) At equivalence point number of moles of acid = number of moles of base
nₐ = nb0.1053 × (17.88 / 1,000) = Mb × (15.00 / 1,000)Mb = 0.1053 × 17.88 / 15.00 = 0.1255 mole/liter = 0.1255 MAnswer: The concentration of NaOH solution is 0.25 M
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
According to the neutralization law,
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of [tex]H_2SO_4[/tex] solution = 0.1053 M
[tex]V_1[/tex] = volume of [tex]H_2SO_4[/tex] solution = 17.88 ml
[tex]M_2[/tex] = molarity of [tex]NaOH[/tex] solution = 0.46 M
[tex]V_2[/tex] = volume of [tex]NaOH[/tex] solution = 15.0 ml
[tex]n_1[/tex] = valency of [tex]H_2SO_4[/tex] = 2
[tex]n_2[/tex] = valency of [tex]NaOH[/tex] = 1
[tex]2\times 0.1053M\times 17.88=1\times M_2\times 15[/tex]
[tex]M_2=0.25[/tex]
Therefore, the concentration of NaOH solution is 0.25 M
Which of the following is the major regulator of oxygen consumption during oxidative phosphorylation?
a.NADH
b.NAD+
c.NADPH
d.NADP+
e.ATP
f.ADP
g.O2
h.H20
i.CO2
Answer:
f.ADP
Explanation:
Oxidative phosphorylation occurs during the electron transport chain which is the final phase of cellular respiration. It depends on the hydrogen ion concentration gradient generated and is maintained by the electron transport chain. The oxidative phosphorylation acquires energy of high-energy electrons to synthesize ATP. During this process ADP is the major regulator of oxygen consumption.The regulation by ADP is referred to as the acceptor or respiratory control.Answer: F. ADP
Explanation:
The level of ADP is the most important factor in the determination of the rate of Oxidative Phosphorylation.
The rate of oxygen utilization by the Mitochondria is increased when ADP is added and usually returns to its initial level when the added ADP has being converted to ATP.
For a sustainable fission reaction, each fission must produce exactly _____ additional fission reaction(s).
For a sustainable fission reaction, each fission must produce exactly one additional fission reaction(s).
Answer: one
For a sustainable fission reaction, each fission must produce enough neutrons to induce at least one more fission reaction. This typically involves the fission of a heavy nucleus like Uranium-235 where every fission event produces two or three neutrons capable of causing further fission.
Explanation:In a sustainable fission reaction, each fission must produce enough neutrons to induce at least one more fission reaction. It's important to note that this depends on several factors, such as the number of neutrons produced in an average fission event, and the specific type of nuclide undergoing fission.
Typically, the fission of a heavy nucleus like Uranium-235 produces two or three neutrons, each of which is capable of causing the fission of another nucleus. If this process is sustained, a nuclear chain reaction occurs which, when controlled, serves as the basis for nuclear power generation.
Learn more about Sustainable Fission here:https://brainly.com/question/31873867
#SPJ3
What type of bond joins glycerol to fatty acids?
Ester linkages
Amine linkages
Carbohydrate linkages
Phosphate linkages
Answer:
Ester Linkages
Explanation:
In a fat molecule, the fatty acids are attached to each of the three carbons of the glycerol molecule with an ester bond through the oxygen atom.
You're welcome
The bond that joins glycerol to fatty acids in lipids like triglycerides and phospholipids is the ester linkage.
Explanation:The type of bond that joins glycerol to fatty acids in fat molecules and phospholipids is the ester linkage. Glycerol, which is a triol, bonds with three fatty acids, each through an ester bond, during a dehydration synthesis reaction. This reaction forms a triglyceride, which is a type of lipid essential for storing energy and providing insulation. In triglycerides, the fatty acids are attached to glycerol's three carbons through an oxygen atom, forming a strong ester bond. In the case of phospholipids, which are the major constituents of cell membranes, two fatty acid chains and a phosphate group form ester linkages with the glycerol backbone.
Identify the substance that each property describes.
only acid
only base
both acid and base
feels slippery
tastes sour
conducts electricity
Explanation:
Acids are the substances that have pH less than 7. Acids are sour in taste and when dissolved in a polar solvent like water they dissociate into ions. Hence, they are able to conduct electricity.
Whereas bases are the substances that have pH more than 7. Bases are slippery in nature and when dissolved in a polar solvent like water they dissociate into ions. Hence, they are also able to conduct electricity.
Hence, we can conclude that the given substances with each property are described as follows.
Only acid - tastes sourOnly base - feels slipperyboth acid and base - conducts electricityAnswer: what he said ^
Explanation:
How many moles of carbon dioxide will be produced from the complete combustion of 13.6 moles of butane?
Answer:
54.4 mol
Explanation:
the equation for complete combustion of butane is
2C₄H₁₀ + 13O₂ ---> 8CO₂ + 10H₂O
molar ratio of butane to CO₂ is 2:8
this means that for every 2 mol of butane that reacts with excess oxygen, 8 mol of CO₂ is produced
when 2 mol of C₄H₁₀ reacts - 8 mol of CO₂ is produced
therefore when 13.6 mol of C₄H₁₀ reacts - 8/2 x 13.6 mol = 54.4 mol of CO₂ is produced
therefore 54.4 mol of CO₂ is produced
What quantity of energy is released when 540 g of cyclopentane are burned amswer?
Final answer:
When 540 g of cyclopentane are burned, approximately 8434.2 kJ of energy is released.
Explanation:
In order to determine the quantity of energy released when 540 g of cyclopentane is burned, we can use the information given in the examples. For example, when 3.12 g of glucose is burned, it releases 48.7 kJ of heat. We can use this information to calculate the heat released per gram of glucose, and then apply it to cyclopentane.
First, we calculate the heat released per gram of glucose:
Heat released per gram of glucose = 48.7 kJ / 3.12 g = 15.63 kJ/g
Now, we can use this value to calculate the heat released when 540 g of cyclopentane is burned:
Heat released = 15.63 kJ/g × 540 g = 8434.2 kJ
Therefore, when 540 g of cyclopentane is burned, approximately 8434.2 kJ of energy is released.
How many valence electrons are in an atom with the electron configuration in example A? Example A: 1s22s22p63s23p64s1 7 1 6 19
Final answer:
The atom with the electron configuration 1s²2s²2p⁶3s²3p⁶4s¹ has 1 valence electron.
Explanation:
The subject of the question is regarding the number of valence electrons present in an atom with the given electron configuration. The configuration provided, 1s²2s²2p⁶3s²3p⁶4s¹, represents the distribution of electrons in the different orbitals of an atom. Valence electrons are the electrons in the outermost shell of an atom and they determine the chemical behavior of the atom.
In example A, the outermost shell corresponds to the fourth energy level (n=4), where the valence electron configuration is 4s1. Hence, there is 1 valence electron in the atom with this configuration. This configuration is typical for the element potassium (K), which is located in Group 1 of the periodic table and commonly has one valence electron.
The human body is made up of cells. The cells are like building blocks that are put together in just the right way to create a human. The cells of a human body can best be compared to a atoms in matter b thermal energy c oxygen in plants d conduction in heat transfer
Answer: i would personly say it would be atomos in matter because that mostly how human cells work
A man weighing 48 newtons climbs a 2.0-meter ladder. How much work is done? 0.0 J 24 J 96 J 124 J
Answer:C) 96 j
explanation:48 N * 2.0 m = 96. Your answer should be C, 96 joules.
Answer: Work done by the man will be 96 J.
Explanation:
Work is defined as the amount of energy that is transferred in order to move an object by an external force. It is expressed in joules.
Mathematically,
[tex]W=F\times d[/tex]
Where,
W = Work done = ? J
F = Force applied = 48 N
d = Displacement of the body = 2 m
Putting values in above equation, we get:
[tex]W=48\times 2=96J[/tex]
Hence, work done by the man will be 96 J.
Select the correct answer. Which statement describes the acid found in vinegar (acetic acid)? A. It tastes bitter. B. It feels slippery. C. It changes red litmus paper to blue. D. It reacts with Mg to produce H2. E. It releases OH- in a solution.
Answer:
D. It reacts with Mg to produce H2.
Answer: Option (D) is the correct answer.
Explanation:
The acetic acid, [tex](CH_{3}COOH)[/tex] present in vinegar reacts wit magnesium and therefore, it releases hydrogen gas and magnesium acetate.
The chemical reaction will be as follows.
[tex]2CH_{3}COOH + 2Mg \rightarrow 2Mg(CH_{3}COO) + H_{2}[/tex]
An acid is a substance which has pH less than 7 and changes blue litmus red. Acids taste sour as they are acidic in nature and releases hydrogen ions.
Whereas bases have pH greater than 7 and changes red litmus into blue.Bases taste bitter and releases hydroxide ions.
Thus, we can conclude that the statement it reacts with Mg to produce [tex]H_{2}[/tex] best describes the acid found in vinegar (acetic acid).
The key requirement for a chain reaction is that...
More neutrons are produced than are absorbed
For the reaction ag2s(s) ⇌ 2 ag+ (aq) + s2- (aq), keq = 2.4 × 10-4 and the equilibrium concentration of silver ion is [ag+] = 2.5 × 10-1 m. what is [s2-] at equilibrium?
Answer : The concentration of silver ion is, [tex]3.8\times 10^{-3}M[/tex]
Explanation :
Equilibrium constant : It is defined as the equilibrium constant. It is defined as the ratio of concentration of products to the concentration of reactants.
The equilibrium expression for the reaction is determined by multiplying the concentrations of products and divided by the concentrations of the reactants and each concentration is raised to the power that is equal to the coefficient in the balanced reaction.
As we know that the concentrations of pure solids and liquids are constant that is they do not change. Thus, they are not included in the equilibrium expression.
The given equilibrium reaction is,
[tex]Ag_2S(s)\rightleftharpoons 2Ag^+(aq)+S^{2-}(aq)[/tex]
The expression of [tex]K[/tex] will be,
[tex]K_{eq}=[Ag^+]^2[S^{2-}][/tex]
[tex]2.4\times 10^{-4}=(2.5\times 110^{-1})^2[S^{2-}][/tex]
[tex][S^{2-}]=3.8\times 10^{-3}M[/tex]
Therefore, the concentration of silver ion is, [tex]3.8\times 10^{-3}M[/tex]
3.84 x 10⁻³ M
Further explanationGiven:
[tex]\boxed{K_{eq} = 2.4 \times 10^{-4}}[/tex]The equilibrium concentration of silver ion is [tex]\boxed{ \ [Ag^+] = 2.5 \times 10^{-1} \ M \ }[/tex].Question:
What is [S²⁻] at equilibrium?
The Process:
For the reaction [tex]\boxed{ \ Ag_2S_{(s)} \rightleftharpoons 2Ag^+_{(aq)} + S^{2-}_{(aq)} \ }[/tex], we can observe that the substances on the right-hand side have a solution phase (aq) that is allowed into the equilibrium constant K.
Remember, pure solids (s) and liquids (l) are disregarded and kept at 1.
Therefore, from the initial formula [tex]\boxed{ \ K = \frac{ [Ag^+]^2.[S^{2-}] }{[Ag_2S]} \ }[/tex] we get the final result [tex]\boxed{ \ K = [Ag^+]^2.[S^{2-}] \ }[/tex].
Let us find out [S²⁻] at equilibrium.
[tex]\boxed{ \ K_{eq} = [Ag^+]^2.[S^{2-}] \ }[/tex]
[tex]\boxed{ \ 2.4 \times 10^{-4} = [2.5 \times 10^{-1}]^2.[S^{2-}] \ }[/tex]
[tex]\boxed{ \ 2.4 \times 10^{-4} = 6.25 \times 10^{-2} \cdot [S^{2-}] \ }[/tex]
[tex]\boxed{ \ [S^{2-}] = \frac{2.4 \times 10^{-4}}{6.25 \times 10^{-2}} \ }[/tex]
Thus we get [S²⁻] at equilibrium equal to [tex]\boxed{ \ [S^{2-}] = 3.84 \times 10^{-3} \ M \ }[/tex]
- - - - - - - - - -
Notes:
[tex]\boxed{ \ K_c \ or \ K_{eq} \ }[/tex], denotes that the equilibrium constant is expressed using molar concentrations, i.e., [tex]\boxed{ \ mol.dm^{-3} \ or \ mol.L^{-1} \ \ }[/tex]. For this question, [tex]\boxed{ \ K_c \ }[/tex] means the same thing as [tex]\boxed{ \ K_{eq} \ }[/tex].The rIght-hand side of the equation on top, left-hand side of the equation on the bottom.The square brackets show concentrations in [tex]\boxed{ \ mol.dm^{-3} \ or \ mol.L^{-1} \ or \ M \ }[/tex].The indices are the numbers in front of each substance (or the coefficients) in the chemical equation.A heterogeneous balance consists of more than one phase. Typical examples include reactions involving solids and gases, or solids and liquids. Substances that can be included in formula K are substances with a gas phase (g) or aqueous phase (aq). Pure solids and liquids are unincluded in the equilibrium constant expression because they do not affect the reactant amount at equilibrium in the reaction, so they are disregarded and kept at 1.Learn moreWrite the equilibrium constant for the reaction https://brainly.com/question/10608589 Write the equilibrium constant for the reaction a heterogeneous balance https://brainly.com/question/13026406What is the Ksp of the salt at 22°C? https://brainly.com/question/8985555Consider the following reaction: H2(g)+I2(g)⇌2HI(g) Complete the following table. Assume that all concentrations are equilibrium concentrations in M. T(∘C) [H2] [I2] [HI] [Kc] 25 0.0355 0.0388 0.922 − 340 − 4.60×10−2M 0.394M 9.6 445 4.90×10−2M 4.76×10−2M − 50.2 Find Kc at 25∘C. Find [H2] at 340∘C. Find [HI] at 445∘C.
These are three questions.
Answer:
Question 1) Find Kc at 25°C: 617Question 2) Find [H₂] at 340°C: 0.352 M Question 3) Find [HI] at 445°C: 0.342 MExplanation:
I will start by copying the table for better understanding of the data and the work to do.
T(∘C) [H2] [I2] [HI] [Kc]
25 0.0355 0.0388 0.922 -
340 4.60×10⁻²M 0.394M 9.6
445 4.90×10−2M 4.76×10⁻²M − 50.2
The chemical equation that represents the equilibrium is also given:
H₂ (g) + I₂(g) ⇄ 2HI(g)From that equilibrium equation, you can fnd the expression of the equlibrium constant, Kc, as:
[tex]Kc=[HI]^2/([H_2][I_2])[/tex]
The calculations and explanations to answer the three questions are in the pdf file attached.
Please, click on the image of the file to open it.
The equilibrium constant Kc at 25∘C for the given reaction is 562.41. The concentration of H2 at 340∘C is 4.60×10⁻²M, and the concentration of HI at 445∘C is 0.327M.
Explanation:The questions are asking for the equilibrium constant Kc at 25∘C, the concentration [H2] at 340∘C, and the concentration [HI] at 445∘C for the reaction H2(g)+I2(g)⇌2HI(g). The equilibrium constant equation, Kc = [HI]² / ([H2]×[I2]), can be used with the provided equilibrium concentrations to solve these questions.
At 25∘C, the Kc can be calculated as (0.922)²/(0.0355×0.0388) = 562.41. At 340°C, the H2 concentration is provided as 4.60×10⁻²M. For the HI concentration at 445∘C; using the relationship Kc = [HI]² / ([H2]×[I2]), adjusting for the given Kc value, we can solve for [HI] as sqrt(Kc×[H2]×[I2]) such that, [HI] = sqrt(50.2 * 4.90×10⁻²M × 4.76×10⁻²M) = 0.327M.
Learn more about Chemical Equilibrium here:https://brainly.com/question/3920294
#SPJ11
The Tyndall effect is used to distinguish between
a. solutions and colloidsb. solvents and solutesc. liquids and gasesd. electrolytes and nonelectrolytes
A. solutions and colloids
Which is a higher concentration, 10^-9M OR 10^-8M? Explain.
10^-8 is 10x more Molar than 10^-9, because of the exponents so it’d be 10x more concentrated than 10^-9. The answer is 10^-8.
A sample of iron has a volume of 10.0 mL. The density of iron is 7.87 g/mL. Which is thecorrect expression to calculate the mass of the sample using dimensional analysis?a. 10.0 mL x 7.87g/1mL b. 10.0 mL x 1g/7.87mL c. 10.0 mL x 1mL/7.87gd. 10.0 mL x 7.87mL/1g
Answer:
option a. 10.0 mL × 7.87 g / 1mLExplanation:
The symbol [ ] is used to indicate units, so:
[m] means mass units[V] means volume units[d] means density unitsHere:
[m] = g[V] = mL[d] = g/ mLSince, you know the volume of the sample (10.0 mL), the density of the iron (7.87 g/mL), and you need to find the expression to calculate the mass of the sample, you use dimensional analysis:
g = mL × g / mL ← here you see that in the right side mL of the first factor cancels with mL in the denominator of the second factor, yielding g, with which the units of the left side and the right side are equal.Then, you just must add the numerical values for each group of units:g = 10.0 mL × 7.87 g / mL is the desired expression.
When you simplify that expression you obtain:
g = 78.7 g ↔ [ mL were canceled]. And that is the mass of the sample of iron applying dimensional analysis to the given data.CHEMISTRY QUESTION WILL MARK YOU BRAINLIEST!
Based on Boyle's law, which of the following statements is true for an ideal gas at a constant temperature and mole amount?
A. Pressure is directly proportional to volume.
B. Pressure is inversely proportional to volume.
C. The number of collisions is independent of pressure.
D. The number of collisions decreases with increase in pressure.
Answer:
Based on Boyle's law, which of the following statements is true for an ideal gas at a constant temperature and mole amount?
A) Pressure is directly proportional to volume.
B) Pressure is inversely proportional to volume. CORRECT ANSWER!!!
C) The number of collisions is independent of pressure.
D) The number of collisions decreases with increase in pressure.
B is the CORRECT answer!!!
Based on Boyle's law, pressure is inversely proportional to volume is true for an ideal gas at a constant temperature and mole amount.
What is Boyle's law?Boyle’s law is a gas law which states that the pressure exerted by a gas (of a given mass, kept at a constant temperature) is inversely proportional to the volume occupied by it. In other words, the pressure and volume of a gas are inversely proportional to each other as long as the temperature and the quantity of gas are kept constant.
Boyle’s law is a connection between pressure and volume. It asserts that under constant temperature, the pressure of a specific quantity of gas is inversely proportional to its volume. It is possible to prove the law empirically. The paper discusses a syringe-based experimental approach for verifying the law.
The mathematical equation for Boyle's law is, where P denotes the pressure of the system, V denotes the volume of the gas, k is a constant value representative of the temperature and volume of the system.
The correct answer is option B.
Learn more about Boyle's law, refer:
brainly.com/question/12817429
#SPJ2
Pressure has the greatest effect on the solubility of
Answer:
Pressure has the greatest effect on the solubility of gasesExplanation:
Henry's law states that the solutiblity of a gas in a liquid is propotional to the pressure that the gas exertes over the liquid.
Call Sg the solubility molar concentraion of tghe gas, mole concentration of the gas, Kh the constant of proportionality, and Pg the pressure of the gas, then:
Sg = Pg × KhThen, if the pressure increases the solubility of the gas (its concentration in the liquid) increases, and if the pressure decreases the solubility of the gas decreases.
The physical reason for the influence of the pressure on the solubility is that more pressure forces the contact between the gas over the liquid and the liquid making that more gas gets into the liquid.
Pressure has very little effect on the solubility of solids or liquids, but has a significant effect on the solubility of gases. Gas solubility increases as the partial pressure of a gas above the liquid increases.
Explanation:Pressure has very little effect on the solubility of solids or liquids, but has a significant effect on the solubility of gases. Gas solubility increases as the partial pressure of a gas above the liquid increases. For example, when carbonated beverages are packaged, they are done so under high CO₂ pressure so that a large amount of carbon dioxide dissolves in the liquid. The solubility of a gas decreases with increasing temperature.
The table below gives the data that is needed to calculate the average atomic mass of element B. Isotope Atomic mass (amu) Relative abundance (%) B-10 10.01 19.91 B-11 11.01 80.09 Based on these data, what is the average atomic mass of element B? 10.01 10.51 10.81 11.01
Answer:
[tex]\boxed{\text{10.81 u}}[/tex]
Explanation:
The atomic mass of B is the weighted average of the atomic masses of its isotopes.
We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its percent of the total).
Set up a table for easy calculation:
[tex]\begin{array}{ccccr}\textbf{Atom} & \textbf{Mass/u} &\textbf{Percent} & \textbf{Calculation}& \textbf{Result}\\^{10}\text{B}& 10.01 & 19.91 & 10.01 \times 0.1991 & 1.99\\^{11}\text{B}& 11.01 & 80.09 & 11.01 \times 0.8009 & 8.82 \\& & & \text{TOTAL} = &\textbf{10.81}\\\end{array}[/tex]
The average atomic mass of B is [tex]\boxed{\textbf{10.81 u}}[/tex].
Answer:
10.81u
Explanation:
I just did the test
What occurs during electrolysis? Low-energy reactants become high-energy products. High-energy reactants become low-energy products. Unreactive elements become reactive elements. Reactive elements become unreactive elements.
Answer:
Low-energy reactants become high-energy products.
Explanation:
In electrolysis, you are forcing a reaction to occur that otherwise wouldn't happen.
You are pumping energy into the system and converting low-energy reactants into high-energy products.
B is wrong. Nature tends to run downhill energetically, so high-energy reactants tend to form low-energy products spontaneously.
C and D are wrong. If an element is unreactive, it stays unreactive, and vice versa. You can't change the nature of an element.
Answer:
Low-energy reactants become high-energy products.
Explanation:
What do you understand by the following terms used in a chemical equation :
a. Reactants
b. Products
c. Balanced chemical equation
Answer:
The 'reactants' react to form 'products'. Your turn this into a symbol equation and it is unbalanced so you must make it a 'balanced chemical equation'.
Hope this helps :)
Have a great day !
5INGH
Explanation:
Which statement correctly compares chemical reactions with nuclear reactions? In chemical reactions, new isotopes are formed. In nuclear reactions, new compounds are formed. Chemical reactions can be represented by balanced equations. Nuclear reactions cannot be represented by balanced equations. In chemical reactions, small amounts of energy can be absorbed or released. In nuclear reactions, changes in energy are much larger. In chemical reactions, only protons and neutrons are affected. In nuclear reactions, only electrons are affected.
Answer:
In chemical reactions, small amounts of energy can be absorbed or released. In nuclear reactions, changes in energy are much larger.
Explanation:
Chemical reactions involves the release or absorption of energy from the environment. When energy is released into the environment the chemical reaction is called exothermic reaction, while the one that takes energy from the environment is called endothermic reaction.Nuclear reactions on the other hand involves the release of large amounts of energy. Nuclear reactions are classified as either nuclear fission or nuclear fusion. Energy generated during nuclear reactions is large enough to produce electricity in nuclear power plants.Answer:
the answer is c
Explanation:
The removal of silver tarnish from silverware using aluminum foil and a solution of electrolyte is an example of 1. oxidation of aluminum metal. 2. an example of an electrochemical cell. 3. all of these 4. reduction of silver ions.
Answer:
[tex]\boxed{\text{3. All of these}}[/tex]
Explanation:
The tarnish on silverware is silver sulfide.
You can remove the tarnish by resting the silverware on a piece of aluminium foil in a pot of boiling water with a small amount of salt.
The reaction is an example of an electrochemical cell.
The half-cell reactions are
3×[Ag₂S(s) + 2e⁻ ⟶ 2Ag(s) + S²⁻(aq)]
2×[Al(s) ⟶ Al³⁺(aq) + 3e⁻]
2Al³⁺(aq) + 3S²⁻(aq) ⟶ Al₂S₃(s)
3Ag₂S(s) + 2Al(s) ⟶ 6Ag(s) + Al₂S₃(s)
The aluminium ions react with the sulfide ions to form aluminium sulfide.
The aluminum atoms lose three electrons each, so they are oxidized.
The silver atoms gain one electron each, so they are reduced.
Thus, the answer is [tex]\boxed{\textbf{3. All of these}}[/tex].
THERE ARE FOUR SOLUTIONS: A, B, C, D. SOLUTION A YIELDS 3 PROTONS UPON IONIZATION, SOLUTION B IS AN ELECTRON PAIR DONOR, SOLUTION C IS AN OH- PRODUCER, AND SOLUTION D IS AN ELECTRON PAIR ACCEPTOR. WHICH OF THE FOLLOWING STATEMENTS IS TRUE.
A)C IS AN ACID
B)D IS A BASE
C)B IS A BASE
D)A IS A TRIPROTIC BASE
Answer:
The correct answer is C) B is a base. I just did it.
Explanation:
Which climate conditions will cause the fastest chemical weathering of granite, sandstone, and shale
The correct answer is - tropical wet.
The tropical wet climate conditions are the ones that will enable the quickest chemical weathering of the granite, sandstone, and shale. That is due to the constant heat, high humidity, and daily rain pours.
Hope this helps :D
The correct answer is - tropical wet.
The tropical wet climate conditions are the ones that will enable the quickest chemical weathering of the granite, sandstone, and shale. That is due to the constant heat, high humidity, and daily rain pours.
The water from the rain, and the intense humidity caused by the heat, will interact with the rocks and will be altering their surface with the chemical properties it posses.
In a very small period of time, the rocks will start to be weathering, change their shape, and lose layers.
Which three temperature readings all mean the same thing?
A. 373 Kelvin, 100 degrees Celsius, 273 degrees Fahrenheit.
B. 273 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit.
C. 100 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit.
D. 273 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit.
Answer: The correct answer is D. 273 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit.
Explanation:
Conversion of degree Celsius to Kelvin :
K=^oC+273
Conversion of degree Celsius to degrees Fahrenheit :
^oF=(\frac{9}{5}\times ^oC)+32
By using these two conversion factors, we get the three temperature readings all mean the same thing.
For option A :
K=^oC+273=100+273=373K
^oF=(\frac{9}{5}\times ^oC)+32=(\frac{9}{5}\times 100)+32=212^oF
For option B :
K=^oC+273=100+273=373K
^oF=(\frac{9}{5}\times ^oC)+32=(\frac{9}{5}\times 100)+32=212^oF
For option C :
K=^oC+273=0+273=273K
^oF=(\frac{9}{5}\times ^oC)+32=(\frac{9}{5}\times 0)+32=32^oF
For option D :
K=^oC+273=0+273=273K
^oF=(\frac{9}{5}\times ^oC)+32=(\frac{9}{5}\times 0)+32=32^oF
From the given options, only option (D) is correct.
Hence, the correct option is, (D) 273 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit
Hope this helps!
Temperature is a degree of measure of heat and coldness. Temperature readings that are the same are 273 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit.
What are the units of the temperature?Temperature tells about the hotness and the cold degree measure of any substance or object. It can be measured by Kelvin, Celsius or Fahrenheit scale.
Convert degree Celsius to kelvin as:
[tex]\begin{aligned}\rm K &= \rm ^{\circ} C+273\\\\&= 0 + 273 \\\\&= 273 \;\rm kelvin\end{aligned}[/tex]
Convert degree Celsius to Fahrenheit as:
[tex]\begin{aligned}^{\circ} \rm F & = \rm (\dfrac{9}{5}\times ^{\circ} C)+32\\\\&= 0 + 32\\\\&= 32 \;\rm Fahrenheit \end{aligned}[/tex]
Therefore, option D. 273 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit is the temperature reading that means the same.
Learn more about temperature units here:
https://brainly.com/question/2800860
Which type of functional group is located on a monosaccharide?
Halogen
Alcohol
Amine
Alkane
Answer:
Alcohol
Explanation:
Monosaccharides are the building block of carbohydrates, they include examples such as glucose, fructose, and galactose among others.Two monosaccharides join to form a disaccharide such as maltose and sucrose while many monosaccharides join to form polysaccharides such as starch and cellulose.Monosaccharides are made up of functional groups; carbonyl group,-COO and hydroxyl group also known as alcohol, OH.The type of functional group found on a monosaccharide is an alcohol group. Monosaccharides, like glucose, contain multiple alcohol (-OH) groups.
Explanation:The type of functional group located on a monosaccharide is an alcohol group. Monosaccharides are the simplest form of sugars and are characterized by the presence of multiple hydroxyl (-OH) groups, which are alcohol groups. An example of a monosaccharide is glucose, which has five alcohol groups. Other functional groups like halogen, amine, and alkane are not typically associated with monosaccharides in their common forms.
Learn more about Functional Groups here:https://brainly.com/question/33836452
#SPJ6
Microwave ovens are able to cook food because they increase the_______ of water molecules in the food.
a. vibrational energy.
b. rotational energy.
c. potential energy.
d. transnational motion
e. calories.
potential energy with the heat given to the food
Final answer:
Microwave ovens cook food by increasing the rotational energy of water molecules within the food.
Explanation:
Microwave ovens can cook food because they increase the rotational energy of water molecules in the food. Microwaves emit electromagnetic radiation, typically at a frequency of around 2.45 GHz, which is absorbed by the dipole water molecules found in food. As these water molecules absorb the microwaves, they rotate more rapidly, this increase in rotational motion then is transformed into heat through the interactions with surrounding molecules, thus cooking the food.
When microwaves interact with water molecules, this interaction causes an increase in the vibrational and rotational energies due to the water's dipolar nature, with the rotational aspect being most significant in microwave cooking. It is this rotational kinetic energy that is transformed into thermal energy, which heats and cooks the food. This energy transfer from microwaves to rotational motion, and subsequently to heat, is efficient as the frequency of microwaves in the oven is specifically tuned to the resonant frequency for water molecule rotation.
The freezing point and the boiling point of water can be altered by a variety of
techniques.
Which of the following has little or no effect on the boiling point of water?
a. Increasing the air pressure above the liquid
b. Adding alcohol to the water
c. Adding sodium chloride to the water
d. Increasing the amount of water
Answer:
Option d. increasing the amount of water has no effect of the boiling point of water.Explanation:
The boiling point is defined as the tempearature at which the vapor pressure of a substance equals the atmospheric pressure.
The vapor pressure is the pressure exerted by the vapor particles above the liquid in a sealed container.
In order to a liquid boil, the particles must have enough kinetic energy to escape from the tliquid to the gas (vapor) phase. With that we can approach the choices:
a. Increasing the air pressure above the lquid.
Incorrect choice.
If the air pressure above the liquids is increased, then the liquid particles will need more energy to escape, which means that this change has a considerable effect on increasing the boiling point.
b. Adding alcohol to the water.
Incorrect choice.
The alcohol added to the water is a solute. Some of the particles of the alcohol added will ocuppy part of the surface of liquid, reducing the number of particles of water that can escape from the liquid phase to the gas state. This reduces the vapor pressure and cause that the boiling point increase. Then, adding alcohol to the water does has an effect on the boiling point (the boiling point will increase).
c. Adding sodium chloride to the water.
Incorrect choice.
As in the case of adding alcohol, sodium chloride is a solute. Thus, the same analysis drives the condlusion that adding sodium chloride to the water does has an effect on the boiling point (the boiling point will increase).
d. Increasing the amount of water.
Correct choice.
The boiling point is a specific property of the substance: it does not depend on the amount of substance. Then, increasing the amount of water will not affect the boiling point.