Chapter 6: Chemical Reactions: Mole and Mass Relationships

Question 1

molecular weight

Answer 1

the sum of atomic weights of all atoms in a molecule

Question 2

formula weight

Answer 2

the sum of atomic weights of all atoms in one formula unit of any compound, whether molecular or ionic

Question 3

mole

Answer 3

the amount of a substance whose mass in grams is numerically equal to its molecular or formula weight

Question 4

molar mass

Answer 4

the mass in grams of one mol of a substance, numerically equal to molecular weight

Question 5

Avogadro’s number

Answer 5

6.022*10^23; the number of formula units in one mol of anything

Question 6

limiting reagent

Answer 6

the reactant that runs out first in any given reaction

Question 7

theoretical yield

Answer 7

the amount of product formed, assuming complete reaction of the limiting reagent

Question 8

actual yield

Answer 8

the amount of product actually formed in a reaction

Question 9

percent yield

Answer 9

the percent of the theoretical yield actually obtained from a chemical reaction