Chem Vocab Unit 6

Question 1

molar mass

Answer 1

mass of one mole of representative particles of a substance

Question 2

law of conservation of mass

Answer 2

law that states total mass of products = total mass of reactants

Question 3

stoichiometry

Answer 3

area of chem, deals with calculation of amounts of substances in a reaction based on the balanced equation

Question 4

mole ratio

Answer 4

conversation factor that relates amounts of moles in any 2 substances in a reaction

Question 5

limiting reactant

Answer 5

reactant used up first in a reaction, determines amount of product that can be formed

Question 6

excess reactant

Answer 6

reactant initially present in a greater amount than will eventually be reacted, some excess reactant is left over after the reaction is complete

Question 7

theoretical yield

Answer 7

max amount of product that could be formed from the given amount of reactant based on ideal stoichiometry

Question 8

actual yield

Answer 8

amount of product formed in a lab reaction

Question 9

percent yield

Answer 9

ratio of actual yield to the theoretical yield in a percentage