Answer:loss of electrons
Explanation:
The change occurring at the anode in an operating electrochemical cell is the loss of electrons [4 ] , which is called oxidation. This is in contrast to the cathode, where reduction occurs and electrons are gained. Option 4 is correct .
In an operating electrochemical cell, the change that occurs at the anode is the loss of electrons. This process is known as oxidation. Remember that oxidation can be easily recalled using the mnemonic 'OIL RIG' which stands for Oxidation Is Loss, Reduction Is Gain of electrons. Therefore, the correct option from the provided choices would be 4: loss of electrons.
To give a practical example, consider a zinc electrode undergoing oxidation in a voltaic cell. Here, zinc atoms at the anode lose electrons to become zinc ions (Zn²⁺). This can be represented by the half-reaction Zn(s) ⇒ Zn²⁺ (aq) + 2e
The released electrons then travel through an external circuit to reach the cathode.
Furthermore, in the process of reduction, occurring at the cathode, copper ions (Cu²⁺) in the solution gain electrons to become solid copper (Cu). This indicates that while the anode loses electrons, the cathode gains them, completing the circuit and allowing the cell to do work.
What type of bond would form between two atoms of fluorine?
A. Single ionic bond
B. Double covalent bond
C. Single covalent bond
D. Double covalent bond
Answer:
C. Single covalent bond
Explanation:
A covalent bond would form between these atoms. Covalent bonds
involve atoms sharing electrons.
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-Hops
Continental waters are classified into two categories Lentic and Lotic. A Lotic Ecosystem has flowing waters, such as creeks,
streams, rivers, springs, brooks and channels. A Lentic Ecosystem has still waters such as; ponds, marshes, ditches, reservoirs,
and lakes. The ecosystem of Lentic and Lotic waters includes biotic (living) interactions between plants, animals and micro-
organisms, and abiotic (nonliving) physical and chemical interactions.
Identify a key nonliving component of a Lentic ecosystem.
NEED HELP ASAP
A. algae
B. bacteria
C. fish
D. wind
Answer:
the answer is (WIND) trust me its right good luck on the test
Explanation:
An acid solution has a concentration of [H+] = 0.010 M; what is the pH of the solution?
Answer:
The hydrogen ion concentration of a solution is 0.01 m what is its PH
Explanation: The pH of a given solution is nothing more than the negative log base 10 of the concentration of hydrogen ions, H+ , which you'll sometimes see written as H3O+ , the hydronium ion. Because the pH is <7 , this solution will be acidic
Explanation:
Please Help!!!....
2H2 + O2 → 2H2O Which statements about the equation shown above are correct? Check all that apply. It represents a reaction that involves rearrangement of atoms. It represents a reaction in which hydrogen nuclei and oxygen nuclei undergo change. It represents a reaction in which hydrogen electrons and oxygen electrons undergo change.
Answer:
a and c on edge
Explanation:
Answer:
A- It represents a reaction that involves rearrangement of atoms.
B- It represents a reaction in which hydrogen electrons and oxygen electrons undergo change.
Which type of bond is present in hydrogen sulfide (H2S)? The table of electronegativities is given.
nonpolar covalent bond (with LD force)
How many moles of sodium are required to produce 40. grams of NaOH? *
2Na + 2H20 (arrow) 2NaOH +H2
.25 moles
.50 moles
1.0 mole
2.0 moles
Answer: 1.0 mole of sodium
Explanation:
40.0 g NaOH x __1 mol__ x __2 mol Na__ = 1 mol of Na
39.999 g 2 mol NaOH
How many molecules of water can be produced from 46.72 liters of C8H18? 2\:C_8H_{18}\:+\:25\:O_2\:\:\Longrightarrow\:\:16\:CO_2\:+\:18\:H_2O2818+252⟹162+182 2 C 8 H 18 + 25 O 2 ⟹ 16 C O 2 + 18 H 2 O
Answer:
1.13×10^25 molecules of water.
Explanation:
Equation of the reaction;
C8H18(g) + 25/2 O2 (g) -------> 8CO2(g) + 9H2O(l)
It is important to first put down the balanced reaction equation. It is not possible to solve any problem on stoichiometric relationship without a balanced reaction equation. Once the equation is obtained, we can now proceed with other steps in the solution of the problem.
From the reaction equation, 1 mole of C8H18 produces 9 moles of water
1 mole of C8H18 occupies 22.4L volume while 1 mole of water contains 6.02×10^23 molecules of water
Hence
22.4 L of C8H18 produces 9(6.02×10^23) molecules of water
46.72 L of C8H18 will produce 46.72 L × 9(6.02×10^23) molecules of water/22.4 L
= 113×10^23 or 1.13×10^25 molecules of water.
When red litmus paper is added to limewater, then what will be the change in litmus paper? Give reason. Write the chemical formula of limewater also.
Answer:
The litmus paper will turn blue; Ca(OH)₂
Explanation:
Limewater is a dilute aqueous solution of calcium hydroxide.
Ca(OH)₂(aq) ⟶ Ca²⁺(aq) + 2OH⁻ (aq)
Limewater contains hydroxide ions. They cause the limewater to be basic.
Litmus is a mixture of dyes extracted from lichens. They are weak acids with complicated formulas.
Let's just write the formula for litmus as HLit.
The hydroxide ions from limewater react with the H of litmus to form a salt — the base form — and water.
HLit + OH⁻ ⟶ Lit⁻ + H₂O
acid form base form
red blue
The base form of litmus is blue, so
Red litmus turns blue in the presence of limewater.
Red litmus paper turns blue when added to limewater due to its alkaline nature (Ca(OH)2).
When red litmus paper is added to limewater, it will turn blue. This color change occurs because limewater, which has the chemical formula Ca(OH)2, is alkaline/basic in nature. The reaction between the red litmus paper and the limewater indicates the alkaline properties of limewater.
n the water cycle, clouds form as a result of .
Answer:
When water droplets get too heavy.
Explanation:
Hope this helps.
Answer:
when the ☁ cant hold no more rain
Explanation:
Which of these types of electromagnetic radiation has the lowest energy?
What is the correct formula that would result from the combination of the two ionic species?
K1+ and NO1-2
The combination of K1+ (potassium ion) and NO1-2 (nitrate ion) results in the formation of a stable compound with the formula KNO3.
The combination of the ionic species K1+ (potassium ion) and NO1-2 (nitrate ion) results in the formation of a stable compound through ionic bonding. The chemical formula for this compound is KNO3.
In KNO3, the potassium ion (K1+) donates one electron to the nitrate ion (NO1-2), forming a positively charged potassium ion and a negatively charged nitrate ion. The ionic bond between them is strong and results in the overall neutral charge of the compound.
Potassium nitrate (KNO3) is a well-known salt with various applications. It is commonly used in fertilizers, food preservation, and the manufacturing of fireworks. The balanced formula reflects the conservation of charge in the chemical reaction, ensuring that the total positive charge from potassium ions is equal to the total negative charge from nitrate ions.
In summary, the correct formula for the compound formed by the combination of K1+ and NO1-2 ions is KNO3, where the potassium ion and nitrate ion combine through ionic bonding to create a stable, electrically neutral compound.
Final answer:
The combination of potassium and nitrite nitrite forms the ionic compound KNO2, which is known as potassium nitrite.When combining these two nitrite , it is essential to balance the charges to form a neutral compound.
Explanation:
The correct formula that would result from the combination of the ionic species potassium and nitrite is KNO2. To write the formula of an ionic compound, the total positive charge must balance the total negative charge. When a metal reacts with a non-metal, the electrons that are in the metal are transferred to the non-metal which then forms an ion. The compound in the results is called an ionic compound. Because potassium has a charge of 1+ and nitrite has a charge of 1−, they combine in a 1:1 ratio to form potassium nitrite.
If two object come in contact with each other and one object is warmer than the other object what happens
D is the answer to the question.
Pleaseee helpppp I will give you the brain thing and A thank you !!!!
A child complains that his soup is too hot. His mother places an ice cube in the soup to cool it.
How will the soup's thermal energy behave?
It will absorb thermal energy from the ice cube.
It will flow from the soup to the ice cube.
It will be destroyed and disappear.
It will not react to the ice cube's presence.
A child complains that his soup is too hot. His mother places an ice cube in the soup to cool it.
How will the soup's thermal energy behave?
Answer:
It will flow from the soup to the ice cube
Explanation:
When an ice cube with low thermal energy is in a hand that has higher thermal energy, thermal energy will flow from the hand to the ice cube in the form of heat.
Answer:
B. It will flow from the soup to the ice cube
Explanation:
what is the correct formula for the compound in the picture
Answer:
Al+O= Al2O3
Explanation:
the chemical formula is Al3 +O2 so if we swapped and dropped the resulting compound is Al2O3
hope this helps
5g of aspirin will powder will take effect more quickly than a 5g aspirin tablet because the powder has more what
Answer:
Explanation:
Because the powder has more finer and larger surface area hence it absorbed faster and it becomes more effective in performance compared to the tablet that will still need to be dissolved before it is been assimilated into the body system.
The molar mass of sucrose (C12H22O11) is 342.3 g/mol. A chemist has a 0.500-mol sample of sucrose. What is the mass, in grams, of this sample?
a) 171
b) 342
c)500
d)684
Answer:
a) 171
Explanation:
We can find the mass (in grams) of a sample by multiplying the amount of moles by the molar mass.
In this case, we know we have 0.500-mol and would multiply it by the molar mass, 342.3g/mol, to give us the answer of 171.15g rounded down to 171g.
Equation: 0.500mol x 342.3g/mol = 171.15g
Answer:
171
Explanation:
Edg
What is the volume needed?
mL of 4.00 M H2SO4
Answer:
1.5
Explanation:
EDG 2020
250ml is the volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex]. The volume is the amount fluid that the container may hold.
What is volume?A measurement of three-dimensional space is volume. Several imperial either Us or customary units, as well as SI-derived units (such the cubic meter and liter), are frequently used to quantify it quantitatively. Volume and length (cubed) have a symbiotic relationship.
The volume of such a container is often thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the amount much fluid (liquid or gas) that the container may hold.
Molarity₁×Volume₁ = Molarity₂×Volume₂
4×Volume₁ = 1×1
Volume₁ = 250ml
Therefore, 250ml is the volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex].
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Your question is incomplete but most probably your full question was,
What volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex].
All members of the domain Bacteria have which of the following characteristics? All bacteria -
A.are multicellular.
B.reproduce sexually.
C.lack a nucleus in their cells.
D.make their own food.
Answer:
B
Explanation:
A characteristic of members of the domain Bacteria is that they: C. lack a nucleus in their cells.
What is a cell?A cell can be defined as the fundamental, functional, structural and smallest unit of life, which is primarily found in all living organisms.
The classification of living organisms.Basically, all living organisms are broadly classified into two (2) main categories according to their cell type and these are;
Unicellular organisms: these are living organisms with a single cell.Multicellular organisms: these are living organisms that possess multiple cells.The domain Bacteria are generally prokaryotes, which means that they are prokaryotic cells with bacterial rRNA but no nuclear membrane.
In conclusion, all members of the domain Bacteria lack a nucleus in their cells.
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Why does 40.0 g of NaOH added to 1.00 L of water not make a 1.00 M NaOH solution
Final answer:
When 40.0 g of NaOH is added to 1.00 L of water, it does not make a 1.00 M NaOH solution because the molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in liters.
Explanation:
When 40.0 g of NaOH is added to 1.00 L of water, it does not make a 1.00 M NaOH solution because the molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in liters.
To make a 1.00 M NaOH solution, we need to know the number of moles of NaOH and the volume of the solution in which it is dissolved. In this case, we are given the mass of NaOH (40.0 g) but not the volume of the solution. Without the volume, we cannot calculate the molarity.
To determine the molarity, we need to know either the volume of the solution or the number of moles of NaOH added to the solution.
The equation shown represents cellular respiration.
Glucose + Z → X + Y + Energy
What do X and Z most likely represent?
Group of answer choices
A X represents water and Z represents oxygen.
B X represents carbon dioxide and Z represents sugar.
C X represents sunlight and Z represents hydrogen gas.
D X represents hydrogen and Z represents carbon dioxide.
Answer:
Option A. X represents water and Z represents oxygen.
Explanation:
Glucose + Z → X + Y + Energy
The equation above gives an illustration of the Combustion of glucose to produce energy needed for metabolic activities.
Thus, writing a balanced equation will help us to identify what X and Z most likely represent. This is illustrated below :
C6H12O6 + 6O2 —> 6H2O + 6CO2 + Energy
We can see clearly that Z is constant i.e Z is oxygen. But X could be either CO2 or H2O.
Considering the options given above, only option A states that Z is oxygen. Therefore, X must be water (H2O).
Answer:
A
Explanation:
Name one object that would be considered a solid. Describe how the atoms move in a solid object.
Objects considered a solid:
Pencil
Water bottle
Phone
Table
Plant
Atoms are very attracted to one another in solid objects. They vibrate, but remain in fixed positions without moving.
Final answer:
A solid is a state of matter in which atoms or molecules do not have enough energy to move. They are constantly in contact and in fixed positions relative to one another.
Explanation:
A solid is a state of matter in which atoms or molecules do not have enough energy to move. They are constantly in contact and in fixed positions relative to one another. Forces between atoms or molecules are strong enough to keep the molecules together and to prevent them from moving past one another.
Which of the following is not a type of covalent bond?
A. Non-polar
B. Polar
C. Quadruple
D. Double
Answer:
I think it would be double D.
The C. Quadruple is not a type of covalent bond
Explanation:A covalent bond is formed when two atoms share electrons between them. The types of covalent bonds are non-polar, polar, single, double, and triple. Non-polar covalent bonds occur when electrons are shared equally between atoms, while polar covalent bonds occur when electrons are shared unequally between atoms. Double and triple bonds occur when more than one pair of electrons is shared between atoms.
Quadruple is not a recognized type of covalent bond in chemistry. Covalent bonds typically refer to single, double, and sometimes triple bonds, which involve the sharing of one, two, or three pairs of electrons between atoms, respectively. Quadruple bonds are not commonly observed in chemical compounds. Thank you for pointing out the clarification.
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Which of the following graphs correctly represents the relationship between the Coulomb force and the distance between the charged particles?
A. Graph A
B. Graph B
C. Graph C
D. Graph D
Answer:
Graph D is correct since the Force is inversely proportional to the square of the distance.
Graph D is correct.
The relationship between Coulomb force and the distance between the charged particles is as follows:-
[tex]F=k(q_1*q_2)/(r^2)[/tex]......(1)
Here, q1 and q2 are the charges, r is the distance between charged particles, and k is the coulomb constant.
From equation (1), it can be said that the force is inversely proportional to the square of the distance. So, Graph D is correct.
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Which of the following units is rarely, if ever, used in science labs?
A.centimeter
B.gram
C.quart
D.milliliter
Answer: C. Quart
Explanation:
Quart is a unit of measurement for liquids and is equivalent to 2 pints.
Quart is a unit which is used rarely if ever in science labs.
What are units?Units are used in measurement and have a definite magnitude which is defined and adopted by law and is used as a standard for measurement of same kind of quantity. Any other quantity of the same kind is expressed as a multiple of unit of the measurement.
There are many system of units which are common out of which International System of units is the modern form of the metric system.
The fields of science, engineering make use of units which aids researchers in problem solving . The system of units varies from country to country and the different system of units are SI system,MKS system and CGS system .
Centimeter, gram and millimeter are SI units which are used in science labs while quart is a non-SI unit and is not oftenly used in labs.
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A student is given 50.0mL of a solution of Na2CO3 of unknown concentration. To determine the concentration of the solution, the student mixes the solution with excess 1.0MCa(NO3)2(aq) , causing a precipitate to form. The balanced equation for the reaction is shown below.
Na2CO3(aq)+Ca(NO3)2(aq)→2NaNO3(aq)+CaCO3(s)
a) Write the net ionic equation for the reaction that occurs when the solutions of Na2CO3 and Ca(NO3)2 are mixed.
Answer:
CO₃²⁻ + Ca²⁺ → CaCO₃(s)
Explanation:
In a net ionic equation there are listed just the ions that are involved in the reaction.
For the reaction:
Na₂CO₃(aq) + Ca(NO₃)₂(aq) → 2NaNO₃(aq) + CaCO₃(s)
Ions are:
2 Na⁺ + CO₃²⁻ + Ca²⁺ + 2 NO₃⁻ → 2 Na⁺ + 2 NO₃⁻ + CaCO₃(s)
Thus, ions that react are just CO₃²⁻ and Ca²⁺ and net ionic equation is:
CO₃²⁻ + Ca²⁺ → CaCO₃(s)
The net ionic equation for the reaction between Na2CO3 and Ca(NO3)2, removing the spectator ions, is 2Na+ + CO32- + Ca2+ → CaCO3 + 2Na+.
Explanation:You were asked to write the net ionic equation for the reaction that occurs when solutions of Na2CO3 and Ca(NO3)2 are mixed. The net ionic equation only includes those substances and ions in the ionic compounds that undergo a chemical change. In this case, they are the ions that combine to form the precipitate CaCO3.
The net ionic equation removes any spectator ions (ions that do not participate directly in the reaction but exist in the solution). In this reaction, the nitrate ions (NO3-) and the sodium ions (Na+) are the spectator ions, as they remain in the solution and do not form a part of the precipitate.
Therefore, the net ionic equation is: 2Na+ + CO32- + Ca2+ → CaCO3 + 2Na+
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The teacher made a 0.5M solutions.How is this number read/said?
Answer:
Zero point five Molar solutions
Explanation:
In chemistry, there are units for expression the concentration of a solution. The concentration of a solution is defined as the amount of solute present in a given volume of solvent. There are diverse units of concentration recognized in chemistry with each one written in its own unique way and with its own unique symbols. Some concentration units are even expressed in percentage.
However, molar concentration is shown as M (upper case letter M). This unit is alternatively written as molL-1. When we write 0.5 M, we pronounce it as zero point five molar.
for the reaction HCI+NaOH➡️NaCi+H2O, how many moles of hydrochloric acid are required to produce 150 g. of water?
Answer: 8.33 mol of HCl (Hydrochloric Acid)
Explanation:
150 g H2O x __1 mol__ x __1 mol HCl__ = 8.33 mol of HCl
18.016 g 1 mol H2O
any measurement that includes both magnitude and direction is called a
Answer:
Vector
Explanation:
A measurement that includes both magnitude and direction is called a vector. It's a quantity fully defined by these two properties. Examples are force, velocity, and displacement.
Explanation:Any measurement that includes both magnitude and direction is called a vector. A vector is a quantity that is fully explained by both direction and magnitude. For instance, force is a good example of a vector because it includes information about the intensity of force (magnitude) and the direction in which it's applied. Other examples of vectors include velocity and displacement.
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URGENT! A solution that contains less solute than it can possibly hold at a given temperature.
a) saturated solution
b) unsaturated solution
c) diluted solution
d) supersaturated solution
Answer:
Diluted solution
Explanation:
It is simple in terms of looking in to it, solute is the solid part of the solution and if a small quantity is dissolved in a solvent which can hold more then the solute added will make the solution diluted and for more info- other answers depict that there is more solute in the solution therefore others can not be the answer
Final answer:
An unsaturated solution contains less solute than it can possibly hold at a given temperature, meaning more solute can still be dissolved. The correct option is b.
Explanation:
A solution that contains less solute than it can possibly hold at a given temperature is referred to as an unsaturated solution. In an unsaturated solution, the solvent is holding solute less than the maximum limit, which indicates that more solute can be dissolved. This is in contrast to a saturated solution, where the solvent is holding the maximum amount of solute that it can dissolve at a given temperature. Another related term is a supersaturated solution, which contains more solute than the solubility limit at a particular temperature and requires special conditions, such as cooling a hot saturated solution, to be formed.