STOICHOMETRY TEST2

Question 1

mole

Answer 1

a counting unit= 6.022 x 1023 particles

Question 2

molar mass

Answer 2

mass of 1 mole of a substance

Question 3

balanced equations

Answer 3

tells you the mole ratio of all substances

Question 4

mole ratio

Answer 4

ratio between coefficients in a balanced equation

Question 5

limiting reagent

Answer 5

the reactant that runs out first

Question 6

excess reagent

Answer 6

the reactant left over after the reaction

Question 7

theoretical yield

Answer 7

maximum amount of possible product

Question 9

actual yield

Answer 9

what you actually get in the lab

Question 10

percent yield

Answer 10

( actual / theoretical x 100%

Question 11

calculate moles to mass

Answer 11

moles x molar mass

Question 12

molecules to moles

Answer 12

molecules / 6.022 x1023

Question 13

percent composition ( masses)

Answer 13

mass of element / total mass of compound x 100

Question 14

percent composition ( formulas )

Answer 14

mass of that element in 1 mole / molar mass of compound

Question 15

what is stoichiometry

Answer 15

measuring amounts of reactants and products in a chemical reaction