Answer:
[tex]\boxed{\rm \text{[ClO$_{2}^{-}$] increases}}[/tex]
Explanation:
At the beginning, you have two reactions happening:
[tex]\rm HCl + H$_{2}$O$ $\, \longrightarrow \,$ H$_{3}$O$^{+}$ + Cl$^{-}$\\\rm HClO$_{2}$ + H$_{2}$O$ $\, \rightleftharpoons \,$ H$_{3}$O$^{+}$ + ClO$_{2}^{-}$[/tex]
As you add KOH(aq), it does two things:
It increases the volume of the solution. It reacts with the hydronium ions to form water.A) The HCl is completely ionized. The Cl⁻ does not react, but it is diluted when the volume of the solution increases. [Cl⁻] decreases.
B) The KOH reacts with the H⁺ and removes it from the solution. [H⁺] decreases.
C) When all the H⁺ from the HCl has been neutralized, the KOH starts neutralizing the H⁺ from the HClO₂. According to Le Châtelier's Principle, more HClO₂ will dissociate to replace the decreased H⁺. [HClO₂] decreases.
D) As HClO₂ reacts, it forms ClO₂⁻. [tex]\boxed{\rm \textbf{[ClO$_{2}^{-}$] increases}}[/tex]
The amount of ClO2- increases as aqueous KOH is added.
AcidsAcids are substances which donate hydrogen ions or protons in aqueous solutions. Acids can either be strong or weak.Strong acids ionize completely in solution to produce hydrogen ions.
Weak acids only ionize partially in solution to produce hydrogen ions.
HCl is a strong acid and ionizes completely to produce hydrogen and chloride ions.HClO2 is a weak acid and only ionizes partially.When aqueous KOH is added to a mixture of HCl and HClO2, the follow occurs:
Hydrogen ions from HCl are removed, hence H+ reduces.Cl- amount remains the same but is diluted as the volume of solution increases.ClO2- increases as the hydrogen ions are removed from the partially ionized HClO2.HClO2 decreases due to equilibrium shift towards formation of more H+ and ClO2-Therefore, the amount of ClO2- increases as aqueous KOH is added.
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Select true or false: if the ph of pure water is 7.0, the hydroxide ion concentration in pure water is 1 × 10–7 m.
Answer:
True
Explanation:
as the ph of pure water is 7
(-)log(10^-7) = 7
The statement if the pH of pure water is 7.0, the hydroxide ion concentration in pure water is 1 × 10⁻⁷M is true.
How do we calculate the hydroxide ion concentration?Hydroxide ion concentration in the solution will be calculated by using the below equation as:
pOH = -log[OH⁻]
Relation between pH and pOH is :
pH + pOH = 14
Given that, pH = 7
So, pOH = 14 - 7 = 7
By using first equation, we have
7 = -log[OH⁻]
[OH⁻] = 10⁻⁷M
Hence, hydroxide ion concentration in pure water is 1×10⁻⁷M.
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Which formula can be used to calculate the actual yield?
(Percent yield × theoretical yield) ÷ 100
(Percent yield ÷ theoretical yield) × 100
(Theoretical yield ÷ percent yield) × 100
(Theoretical yield × amount of reactants) ÷ 100
Answer:
(Percent yield × theoretical yield) ÷ 100.
Explanation:
∵ percent yield of the reaction = [(actual yield)/(theoretical yield)] x 100.
∴ actual yield = [(percent yield of the reaction) x (theoretical yield)]/100.
So the right choice is: (Percent yield × theoretical yield) ÷ 100 .
Answer : The correct option is, [tex]\frac{(\text{Percent yield}\times \text{Theoretical yield})}{100}[/tex]
Explanation :
The formula used for the percent yield will be :
[tex]\text{Percent yield}=\frac{\text{Actual yield}}{\text{Theoretical yield}}\times 100[/tex]
or,
[tex]\text{Actual yield}=\frac{(\text{Percent yield}\times \text{Theoretical yield})}{100}[/tex]
For example : If we are given that the percentage yield of a sample is 94.92% and the theoretical yield is 83.475 g. Now calculate the actual yield of the sample.
By using formula we get the value of actual yield.
[tex]\text{Actual yield}=\frac{(94.92\times 83.475)}{100}=79.23g[/tex]
Thus, the actual yield is, 79.23 g.
Hence, the formula used to calculate the actual yield can be, [tex]\frac{(\text{Percent yield}\times \text{Theoretical yield})}{100}[/tex]
How many liters of oxygen are required to react completely with 1.2 liters of hydrogen to form water? 2H2(g) + O2(g) → 2H2(g)
Answer:
[tex]\boxed{\text{0.60 L}}[/tex]
Explanation:
We can use Gay-Lussac's Law of Combining Volumes to solve this problem.
Gases at the same temperature and pressure react in the same ratios as their coefficients in the balanced equation.
1. Write the chemical equation.
Ratio: 2 L 1 L
2H₂ + O₂ → 2H₂O
V/L: 1.2
2. Calculate the volume of O₂.
According to Gay-Lussac, 1 L of O₂ forms from 2 L of H₂.
Then, the conversion factor is (1 L O₂/2 L H₂).
[tex]\text{Volume of O}_{2} = \text{1.20 L H}_{2}\times \dfrac{\text{1 L O}_{2}}{\text{2 L H}_{2}} = \textbf{0.60 L O}_{2}\\\\\text{You need }\boxed{\textbf{0.60 L of O}_{2}}[/tex]
Which of the following is true of an exothermic reaction? Choose the 4 that apply.
Answer:
heat is relaesed
a decrease in temperature
less than the chemical energy
written as a reactant
Explanation:
Answer:
Answer is Below
Explanation:
For an exothermic reaction, heat is released. Which means that...
1. Heat is written as a product of the reaction.
2. A rise in temperature occurs.
3. Heat is released into the surroundings.
and 4. The chemical energy stored in the bonds of the products is less than that stored in the reactants.
This diagram also explains why this is the case, the chemical energy is lower as you see the products is lower on the graph as compared to the reactants.
Metals and nonmetals can react with each other to form ions. Complete these statements.A potassium atom gains or loses (electrons/protons/neutrons) and forms how many ion?A sulfur atom gains or loses (electrons/protons/neutrons) and forms how many ion?
A potassium atom loses one electron to form a potassium ion with a +1 charge, while a sulfur atom gains two electrons to form a sulfide ion with a -2 charge.
Explanation:Metals and nonmetals can react with each other to form ions through the transfer of electrons. When a potassium atom reacts, it loses one electron and forms a potassium ion with a +1 charge (K+). Potassium is an alkali metal and it typically loses one electron to achieve a noble gas electron configuration.
On the other hand, a sulfur atom typically gains two electrons to form a sulfide ion with a -2 charge (S2-). As a nonmetal, sulfur gains electrons to achieve an octet, resembling the electron configuration of a noble gas.
What needs to be done to balance this equation
Do you nothing (equation is balanced)
Change O2 to O4 on the left side of the equation
Add coefficient 2 to O2 on the left side of the equation
Remove Coefficient in front of H2O on the right side of the equation
Answer : The correct option is, Add coefficient 2 to [tex]O_2[/tex] on the left side of the equation.
Explanation :
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
The reactants and the products are separated by right arrow.
The species present on the left side of the right arrow is known as reactant and the species present on the right side of the right arrow is known as product.
If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.
The coefficient tell us about that how many molecules or atoms present in the chemical equation.
The given chemical reaction is,
[tex]CH_4+O_2\rightarrow CO_2+2H_2O[/tex]
This reaction is an unbalanced chemical reaction because in this reaction number of oxygen atoms are not balanced.
In order to balance the chemical equation, the coefficient '2' put before the [tex]O_2[/tex] and we get the balanced chemical equation.
The balanced chemical reaction will be,
[tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
Hence, the correct option is, Add coefficient 2 to [tex]O_2[/tex] on the left side of the equation.
How much heat energy is added to 2 grams of water if the initial temperature was 40°C and the final temperature is 50°C? (The specific heat of water is 4.18 J/g°C).
To calculate the amount of heat energy added to the water, multiply the mass of water by the specific heat of water and the change in temperature.
Explanation:To calculate the amount of heat energy added to the water, we can use the equation:
q = m * c * ΔT
Where q is the heat energy, m is the mass of the water (2 grams), c is the specific heat of water (4.184 J/g °C), and ΔT is the change in temperature (final temperature minus initial temperature).
Substituting the values into the equation, we get:
q = 2g * 4.184 J/g°C * (50°C - 40°C)
q = 2g * 4.184 J/g°C * 10°C
q = 83.68 J
Therefore, 83.68 Joules of heat energy is added to 2 grams of water.
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Which term is used to describe the reactant that is not used up completely in a chemical reaction?
A. Catalytic reactant
B. Excess reactant
C. Limiting reactant
D. Theoretical yield
The answer is excess reactant
Answer: option B, excess reactant
Explanation:
Since one the reactants is in excess(high amount) compared to other.
Example reaction of H2& Cl2 gives HCl.
If we take excess H2 compared to Cl2. Then we call H2 as excess Reactant.
What type of compound is always an electrolyte? A. Nonpolar covalent B. Polar covalent C. Network solid D. Ionic
The answer is d ionic
What effect does the addition of a catalyst have on a chemical reaction at equilibrium?
Answer:it speeds up the reaction
Explanation:
What is the physical state of the smallest alkanes at room temperature?
They are gases at room temperature
Hope this helps:)
The smallest alkanes, which are those with one to four carbon atoms, are gases at room temperature due to their nonpolar nature and weak dispersion forces.
The physical state of the smallest alkanes at room temperature can be understood by analyzing their properties and boiling points. Alkanes are nonpolar molecules associated through weak dispersion forces. The boiling point of a substance is a rough measure of the energy needed to separate molecules from each other. In the case of the smallest alkanes, specifically those with one to four carbon atoms, they are gases at room temperature. Example alkanes that are gases at room temperature include methane (CH4), ethane (C2H6), propane (C3H8), and butane (C4H10). In contrast, the physical state changes as the number of carbons increases; alkanes become liquids and eventually solids as the carbon chain length and molecular weight increase.
What happens to a catalyst in a reaction?
Answer:
The catalyst is unchanged.
Explanation:
Hope my answer has helped you!
Which pair of substances would most likely result in the production of a gas when reacting with an acid?
litmus and methyl orange
base and salt
metal and carbonate
carbon dioxide and water
Answer: metal and carbonate
Explanation:
According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions [tex](OH^-)[/tex] when dissolved in water and an acid is defined as a substance which donates hydrogen ions [tex](H^+)[/tex] in water.
An acid is represented as :
[tex]HX\rightarrow H^++X^-[/tex]
1. When metal is treated with an acid such as [tex]HCl[/tex], if the metal is more reactive than hydrogen displaces hydrogen from its salt solution and thus produce zinc chloride and hydrogen gas.
[tex]M+xHCl(aq)\rightarrow MCl_x(aq)+xH_2(g)[/tex]
2. When carbonates are treated with acid, double displacement takes place ad carbon dioxide is released as a gas.
[tex]MCO_3(aq)+xHCl(aq)\rightarrow MCl_x(aq)+xH_2O(l)+CO_2(g)[/tex]
Answer:
for those in a hurry, its C
Explanation:
on edge. Metal and carbonates
Which of the subshells below do not exist due to the constraints upon the angular momentum quantum number?A) 2dB) 2sC) 2pD) all of the aboveE) none of the above
Answer:
Option A): Due to the constraints upton the angular momentum quantum number, the subshell 2d does not exist.Explanation:
The angular momentum quantum number, identified with the letter l (lowercase L), number is the second quantum number.
This number identifies the shape of the orbital or kind of subshell.
The possible values of the angular momentum quantum number, l, are constrained by the value of the principal quantum number n: l can take values from 0 to n - 1.
So, you can use this guide:
Principal quantum Angular momentum Shape of the orbital
number, n quantum number, l
1 0 s
2 0, 1 s, p
3 0, 1, 2 s, p, d
Hence,
the subshell 2d (n = 2, l = 2) is not feasible.2s (option B) is possible: n = 2, l = 02p (option C) is possible: n = 2, l = 1[GT.02]Which of these forces in carbon-14 isotopes transforms a neutron into a proton?gravitational forceselectromagnetic forcesweak nuclear forcesstrong nuclear forces
Answer:
The weak nuclear force.
Explanation:
This force is active in radioactivity.
1.A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 40.0 g of calcium fluoride? 2.Silver has two isotopes. One isotope contains 60 neutrons and has a percent abundance of 51.839% the other contains 62 neutrons. Give the atomic symbols for the two isotopes.3.What is the average atomic weight of silver? What is the mass (in grams) of a single chlorine molecule? 4.How many moles of ethanol (CH_3CH_2OH) are in 141 mg?
These are five questions and five answers.
1) Question 1. A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 40.0 g of calcium fluoride?
Answer:
20.5 g CaExplanation:
Calcium fluoride being a pure substance, has a fixed chemical compositon, which means that their elements (atoms), in any sample, are always in the same proportion.
Then, you can set the followoing proportion:
7.70 g Ca / 15.0 g CaF₂ = x / 40.0 g CaF₂Now, solve for x:
x = 40.0 g CaF₂ × 7.70 g Ca / 15.0 g CaF₂ = 20.5 g Ca.The answer must be expressed with 3 significan figures, since the three data are given with 3 significan figures.
2) Question 2. Silver has two isotopes. One isotope contains 60 neutrons and has a percent abundance of 51.839% the other contains 62 neutrons. Give the atomic symbols for the two isotopes.
Answer:
Isotope that contains 60 neutrons: ¹⁰⁷₄₇AgIsotope that contains 62 neutrons: ¹⁰⁹₄₇AgExplanation:
Isotopes are atoms of the same element, with different number of neutrons, so all the isotopes of an element have the same atomic number, Z (number of protons) and different mass number A (number of neutrons + protons).The atomic symbols for isotopes uses the chemical symbol of the atom (Ag for silver); a subscript to the left of the chemical symbol that represents the atomic mass (47 for silver); and a superscript to the left of the chemical symbol that represents the mass number.The mass number, A, for each silver isotope is calculated in this way:
Isotope that contains 60 neutrons: A = 60 + 47 = 107
Isotope that contains 62 neutrons: A = 62 + 47 = 109
Then, the respective atomic symboles are:Isotope with 60 neutrons: ¹⁰⁷₄₇Ag
Isotope with 62 neutrons: ¹⁰⁹₄₇Ag
3) Question 3. What is the average atomic weight of silver? What is the mass (in grams) of a single chlorine molecule?
Answer:
107.96 amuExplanation:
The atomic wieght of the elements is the weighted average weight of the different isotopes of the same element found in the nature, taking into account their relative abundance.
Average atomic weight = ∑( abundance × individual atomic weight)
Average atomic weight of silver = (abundace of isotope 1 × atomic weight isotope 1) + (abundance isotope 2 × atomic weight isotope 2)Abundance isotope 1 = 51.839%Atomic weight isotope 1 = mass number = 60 neutrons + 47 protons = 107 a.m.uAbundance isotope 2 = 100% - 51.839% = 48.161%Atomic weight isotope 2 = 62 neutrons + 47 protons = 109 a.m.u.Average atomic weight of silve = 107 amu × 51.839% + 109 amu × 48.161% = 107.96 amu4) Question without number: What is the mass (in grams) of a single chlorine molecule
Answer:
1.177 × 10⁻²² gExplanation:
The chlorine molecule is diatomic. That means that each molecule contains two atoms. The chemical formula of chlorine molecule is Cl₂.
The mass of one mole of molecules of Cl₂ is 2 × 35.453 g/mol = 70.906 g/mol
Mass of a single molecule = mass of one mol / number of molecules in one molMass of a single molecule = 70.906 g/mol / (6.022 × 10²³ molecules / mol)Mass of a single molecule = 11.77 × 10⁻²³ g = 1.177 × 10⁻²² g5) Question 4. How many moles of ethanol (CH₃CH₂OH) are in 141 mg?
Answer:
0.00301 molExplanation:
Molar mass of CH₃CH₂OH = 2 × 12.011 g/mol + 6 × 1.008 g/mol + 15.999 g/mol = 46.069 g/mol.Formula: number of moles = mass in grams / molar massCalculation: number of moles = 141 mg × ( 1 g /1000 mg) / (46.069 g/mol = 0.00301 molIn 40.0 g of calcium fluoride, there is 20.53 g of calcium. Silver has two isotopes represented by Ag-107 and Ag-109, with the average atomic weight of silver calculated by using their percent abundances. For ethanol, 141 mg corresponds to 0.00306 moles.
Calcium is contained in 40.0 g of calcium fluoride (CaF₂), we use a proportional relationship based on the information provided:
15.0 g of CaF₂ contains 7.70 g of calcium.
40.0 g of CaF₂ contains X g of calcium.
By setting up a proportion, we solve for X:
(7.70 g Ca / 15.0 g CaF₂) = (X g Ca / 40.0 g CaF₂)X = (7.70 g Ca / 15.0 g CaF₂)
40.0 g CaF₂)
X = 20.53 g of calcium.
The atomic symbols for the two isotopes of silver are: Ag-107 (47 protons + 60 neutrons) and Ag-109 (47 protons + 62 neutrons).
The average atomic weight of silver is calculated considering the weighted average of these isotopes and their percent abundances. The mass of a single chlorine molecule (Cl₂), not a chlorine atom, would be the sum of the atomic masses of the two chlorine atoms. However, the specific mass for a single molecule of Cl₂ in grams is a very small number, given that it's typically calculated in atomic mass units.
Finding the number of moles of ethanol (CH₃CH₂OH) in 141 mg:
The molar mass of ethanol is approximately 46.07 g/mol. Therefore:(141 mg) (Unit conversion from mg to g: 141 mg * (1 g/ 1000 mg)) (Divide by the molar mass of ethanol: (0.141 g) / 46.07 g/mol) = 0.00306 mol of ethanol.
A gas occupies a volume of 2.4 L at 14.1 kPa. What volume will the gas occupy at 84.6 kPa?
Answer:
0.40 LExplanation:
Boyle's law for gases states that, at constant temperature, the volume and pressure of a fixed amount of gas are inversely related.
Mathematically, that is:
PV = constantP₁V₁ = P₂V₂Here, you have:
V₁ = 2.4 LP₁ = 14.1 KpaP₂ = 84.6 KPaV₂ = ?Then, you can solve for V₂:
V₂ = P₁V₁ / P₂Substitute and compute:
V₂ = 14.1 KPa × 2.4L / 84.6 KPa = 0.40 L ← answerAnswer:
0.40 L
Explanation:
Which two forces drive the rock cycle?
A. Weathering and erosion
B. Transportation and deposition
C. Mineral composition of existing rock and time
D. Earth's internal heat engine and the water cycle
Answer:
D. Earth's internal heat engine and the water cycle
Explanation:
The rock cycle is driven by the earth's internal heat engine and the water cycle.
The internal heat engine furnishes the earth with the required energy. The energy is used to melt rocks within the earth crust and to initiate convective cells in the mantle. This causes rocks to melt and plates to move. As this occurs, igneous and metamorphic processes takes place.
The water cycle is greatly responsible for the weathering and erosion of rocks. Through these processes of denudation, sediments are formed and deposited within basins on the crust. The action of runing water and glacier plays a very significant role in forming sedimentary rocks.
The interplay between the internal heat Engine and water cycle moves crustal materials to deeper levels of the earth and also deep seated materials to the crust.
The two forces that primarily drive the rock cycle are Earth's internal heat engine and the water cycle. Therefore, option D is correct.
The Earth's internal heat engine, which includes processes like volcanic activity, tectonic plate movements, and mountain building plays a crucial role in the rock cycle.
These processes generate heat and pressure that lead to the formation of new rocks through processes such as solidification, crystallization, and metamorphism.
The water cycle, driven by solar energy, also plays a role as it contributes to weathering and erosion by causing precipitation, runoff, and the movement of water through different stages.
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Urgent 25 points!!
Amanda was asked to make a solution of salt water using 32.0 grams of NaCl and 0.75 Liter of water. Amanda realized that first, she needed to find the number of moles there are in 32 grams of NaCl. She set up the following calculation to find the number of moles of NaCl.
32.0 g NaCl x 1 mole NaCl = 0.55 moles of NaCl
58.45 g NaCl
A. Did Amanda find the number of moles of NaCl correctly? If not, explain.
B. What does Amanda need to do next to calculate the molarity of the NaCl solution? Show your work for full credit.
Answer:
A. Yes, Amanda find the number of moles of NaCl correctly.
B. 0.73 M.
Explanation:
A. Did Amanda find the number of moles of NaCl correctly? If not, explain.
Yes, Amanda find the number of moles of NaCl correctly.The relation to find the no. of moles of NaCl is:No. of moles (n) of NaCl = mass/molar mass.
mass of NaCl = 32.0 g, molar mass of NaCl = 58.45 g/mol.
∴ No. of moles (n) of NaCl = mass/molar mass = (32.0 g)/(58.45 g/mol) = (32.0 g NaCl)*(1 mol of NaCl)/(58.45 g NaCl) = 0.547 mol ≅ 0.55 mol.
B. What does Amanda need to do next to calculate the molarity of the NaCl solution? Show your work for full credit.
Molarity is the no. of moles of solute dissolved in a 1.0 liter of a solution.∴ M = (no. of moles of NaCl)/(volume of solution (L)) = (0.55 mol)/(0.75 L) = 0.73 M.
1+1is= Make that as a ?
Answer: The correct answer to this problem is 2.
Explanation:
We are given a mathematical problem, which is:
1 + 1 = ?
To solve this, we use the mathematical operator known as addition. In this, we add two numbers and the resulting value is the answer to the problem.
By adding 1 and 1, we get:
[tex]\Rightarrow 1+1=2[/tex]
Thus, the correct answer to this problem is 2.
8. Determine the number of significant figures in the following numbers
Answer:
a) 5
b) 4
c) 3
d) 3
e) 4
Explanation:
I use only one rule when the decimal is present, meaning you can see the decimal (as is the case with all of these).
When the decimal is Present, start counting sig figs from the Pacific (left) side of the number beginning with the first non-zero digit and count all the way to the end.
So, for example, in "a", the first non-zero digit starting from the left is 1, then continue counting all the way to the right side.
For "c", the first non-zero digit is the left most 4 (skip the first 4 zeros), then count all the way to the right side.
The average kinetic energy of the particles in a sample of matter is measured as the ____.
A. chemical kinetics
B. thermochemistry
C. reaction rate
D. temperature
Answer:
D. Temperature
Explanation:
Temperature is not energy, let's just make that point first. So how can it be the average kinetic energy then?
Well, the short answer is, it is just a number. Temperature is a number that represents the average kinetic energy. It is important to note that temperature only relates to kinetic energy in substances.
This is what makes it different from heat. Heat considers all forms of energy in the substance.
Answer:
TEMPERATUE
Explanation:
Which describes a radioactive substance?
A. A substance whose nuclei do not stay together
B. A substance that generates radio-wave frequencies
C. A substance that forms positive or negative ions
D. A substance that forms weak molecular bonds
Answer: I believe the Answer is A
Answer:
a substance whose nuclei do not stay together
Explanation:
Which list of solutions is arranged in order from highest boiling point to lowest boiling point?
A 2.0 BaCl2
B 2.0 NaNO3
C 1.0 C6H12O6
D 1.0 K2SO3
Answer:
A) 2.0 BaCl₂ > B) 2.0 NaNO₃ > D) 1.0 K₂SO₃ > C) 1.0 C₆H₁₂O₆Explanation:
The boiling point of a pure solven increases when a solute is added and a solution is formed.
The increase of the boiling point of a solvent, when a non-volatile solute is added, is a colligative property, meaning that it depends of the number particles of solute dissolved.
The equation that rules the increase of the boiling point is:
ΔTb = Kb × m × iWhere:
ΔTb is the increase in the boiling point of the solvent,Kb is the boiling molal constant of the solvent, andi is the Vant' Hoff factor, which accounts for the number of ions when the solute is a ionic compound.Then, since Kb is constant (because it is the same solvent for all the solutions), you must look at the product m × i.
For ionic solutes you assume 100% ionization, which drives to:
Solution Ionization i m m × i
A) 2.0 BaCl₂ Ba⁺² + 2Cl⁻ 3 2.0 6.0 ↔ highest
B) 2.0 NaNO₃ Na⁺ + NO₃⁻ 2 2.0 4.0 ↔ second
C) 1.0 C₆H₁₂O₆ none 1 1.0 1.0 ↔ lowest (fourth)
D) 1.0 K₂SO₃ 2K⁺ + SO₃²⁻ 3 1.0 3.0 ↔ third
Then, 6.0 > 4.0 > 3.0 > 1.0 and the final list of the solutions arranged in order from highest boiling point to lowest boiling point is:
2.0 BaCl₂ > 2.0 NaNO₃ > 1.0 K₂SO₃ > 1.0 C₆H₁₂O₆Answer:
The order should be ABDC.
Explanation:
The reaction 3o2 -> 2o3 has a rate of change of o2 concentation equal to -0.90 mol/l*s. what is the rate of change of o3 concentration
Answer:
0.6 mol/L.s.
Explanation:
For the reaction:3O₂ → 2O₃,
the rate of the reaction = - 1/3d[O₂]/dt = 1/2d[O₃]/dt
where, d[O₂]/dt is the rate of change of O₂ concentation = - 0.9 mol/L.s.
d[O₃]/dt is the rate of change of O₃ concentration.
∴ d[O₃]/dt = - 2/3(d[O₂]/dt) = - 2/3(- 0.9 mol/L.s) = 0.6 mol/L.s.
you fill a rigid steel container that has a volume of 20 L with nitrogen gas to a final pressure of 2 x 10^4 kpa at 23 Celsius. how mny kilorams of n2 does this cylinder contai
Answer:
4.549 kg.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm (P = 2 x 10⁴ kPa/101.325 = 197.4 atm).
V is the volume of the gas in L (V = 20.0 L).
n is the no. of moles of the gas in mol (n = ??? mol).
R is the general gas constant (R = 0.0821 L.atm/mol.K),
T is the temperature of the gas in K (T = 23° C + 273 = 296 K).
∴ n = PV/RT = (197.4 atm)(20.0 L)/(0.0821 L.atm/mol.K)(296 K) = 162.5 mol.
To find the mass of N₂ in the cylinder, we can use the relation:mass of N₂ = (no. of moles of N₂)*(molar mass of N₂) = (162.5 mol)*(28.0 g/mol) = 4549 g = 4.549 kg.
A student increases the temperature of a 200cm3 balloom from 60 degress C to 180 degrees C. What will the new volume of the balloon be? (Be careful with units)
600cm^3
100cm^3
236cm^3
272cm^3
Answer:
The new volume of the balloon is 600cm³
Explanation:
Given parameters:
Initial Volume, which is V₁ = 200cm³
Initial temperature, T₁ = 60°C
Final temperature T₂ = 180°C
Final Volume V₂ =?
To solve this kind of problem, we apply one of the gas laws that shows the relationship between volume and temperature.
This law is the Charles law, it states that " the volume of a fixed mass of a gas is directly proportional to its absolute temperature if pressure is constant".
It is simply expressed as:
V₁/T₁ = V₂/T₂
Since our unknown is V₂, we make it the subject of the expression given above:
V₂ = V₁T₂/T₁
Now input the corresponding values and solve:
V₂ = 200 x 180 / 60
V₂ = 36000/60
V₂ = 600cm³
The new volume of the balloon is 600cm³
Which is an overall third-order reaction?
a. R=k[A]2[b]
b.R= k[A][B]1
c. R=k [X]2[Y]3
d.R=k [x][y]
A on nudity
Reason: ye
Which gas law is considered when scuba diving?
Ideal gas law
Charles law
Boyles law
Combined gas law
The law is Boyel's law.
Explanation:One of the primary laws of material science that impacts the submerged jumping condition for scuba jumpers is Boyle's law.
The law states that as weight changes, the volume of gases in a jumper's body pits and adaptable gear changes as well. Where the water weight builds, 'air spaces' reduces in size, yet as water weight diminishes, the 'air spaces' increments in size. Where the two changes are in direct extent to the weight increment or lessening, the temperature is held consistent.
Solid magnesium has a specific heat of 1.01 J/g°C. How much heat is given off by a 20.0 gram sample of magnesium when it cools from 70.0°C to 50.0°C?
Answer:
404 J
Explanation:
The amount of heat given off by the magnesium sample is given by:
[tex]Q=mC_s \Delta T[/tex]
where
m = 20.0 g is the mass of the sample
[tex]C_s = 1.01 J/gC[/tex] is the specific heat capacity of the magnesium
[tex]\Delta T=50.0 C-70.0 C=-20.0^{\circ}[/tex] is the change in temperature
Substituting into the equation, we find
[tex]Q=(20.0 g)(1.01 J/gC)(-20.0^{\circ})=-404 J[/tex]
and the negative sign means the heat is given off by the sample.
Using the formula for heat exchange (q = mcΔT), we find that a 20.0 gram sample of magnesium releases 404 Joules of heat when cooling from 70.0°C to 50.0°C
Explanation:The student's question involves the physics concept of specific heat. Specific heat is the heat required to change the temperature of 1 gram of a substance by 1 degree Celsius, it's an intensive property. To calculate the amount of heat given off you can use this formula: q = mcΔT, where:
q is the heat exchanged,m is the mass of the substance,c is the specific heat, andΔT is the difference in temperature.For the given problem, the mass (m) of magnesium is 20.0 grams, its specific heat (c) is 1.01 J/g°C and the change in temperature (ΔT) is 70.0°C - 50.0°C = 20.0°C. So,
q = mcΔT
= (20.0 g) * (1.01 J/g°C) * (20.0°C)
= 404 J
Therefore, 404 Joules of heat is released when the 20.0 gram sample of magnesium cools from 70.0°C to 50.0°C.
Learn more about Specific Heat here:https://brainly.com/question/28852989
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