Unit 1: S1.4, S1.5, R2.1

Question 1

Emperical Formula Calculation

Answer 1

replace % with g
convert to moles
divide by smallest result

Question 2

Molecular Formula Calculation

Answer 2

add molar masses together
divide relative molecular mass by result
multiply subscripts

Question 3

Atom Economy

Answer 3

molar mass of product you want / total molar mass of all reactants
x100

Question 4

random vs systematic errors

Answer 4

percent error > percent uncertainty = systematic errors are present

percent error < percent uncertainty = lab was well conducted