topic 3 - quantitive chemistry

Question 1

relative formula masss

Answer 1

just add up the atomic masses

Question 2

moles

Answer 2

moles = mass / relative formula mass

Question 3

limiting reactant

Answer 3

a reaction is limited to the amount of reactant it has.

Question 4

how much volume does one mole of gas occupy?

Answer 4

one mole of gas occupies 24dm^3

so:
volume of gas = (mass if gas/ relative formula mass) * 24

Question 5

concentration calc

Answer 5

conc = no. of moles/ volume

Question 6

atom economy

Answer 6

% of reactants forming useful products

Question 7

percentage yield

Answer 7

(mass of product made/theoretical mass of product) * 100