Chapter 5 Chem Reax

Question 1

The sum of the atomic weights of all atoms in a molecular compound expressed

Answer 1

atomic mass units (amu)

Question 2

the amount of substance that contains as many atoms, molecules, or ions as there are atoms in exactly 12 g of carbon-12.

Answer 2

mole

Question 3

Avogadro’s number

Answer 3

6.02214199 x 10^23

Question 4

study of mass relationships in
chemical reactions

Answer 4

stoichiometry

Question 5

The reactant that is consumed, leaving an excess of another reagent or reagents unreacted

Answer 5

Limiting reagents

Question 6

The mass of product formed in a chemical reaction

Answer 6

actual yield

Question 7

The mass of product that should form in a chemical reaction according to the stoichiometry of the balanced equation

Answer 7

Theoretical yield

Question 8

A solution in
which the solvent is water

Answer 8

Aqueous solution

Question 9

An ion that appears unchanged on both
sides of a chemical equation

Answer 9

Spectator ion

Question 10

loss of electrons;
the gain of oxygen atoms or the
loss of hydrogen atoms

Answer 10

Oxidation

Question 11

Gain of electrons;
the loss of oxygen atoms or the
gain of hydrogen atoms

Answer 11

Reduction

Question 12

Almost all chemical reactions are accompanied by
either a gain or a loss of heat. This heat is called

Answer 12

heat of reaction

Question 13

An entity that accepts electrons in an
oxidation–reduction reaction

Answer 13

Oxidizing agent

Question 14

An entity that donates electrons in an
oxidation–reduction reaction

Answer 14

Reducing agent

Question 15

A chemical reaction that gives off heat

Answer 15

Exothermic Reaction