Calculations

Question 1

Ar

Answer 1

relative atomic mass to 1/12 of C12, taking into account isotopes

Question 2

Mr

Answer 2

relative formula mass

Question 3

mole

Answer 3

Ar/ Mr in grams, Avogadro constant

Question 4

Avogadro constant

Answer 4

1 mol of any substance has the same amount of atoms/ ion/ molecule

Question 5

number of moles =

Answer 5

mass / Ar or Mr

Question 6

mass =

Answer 6

number of moles x Ar or Mr

Question 7

limiting reactant

Answer 7

used up first in a reaction

Question 8

percentage yield

Answer 8

mass of product compared to theoretical product

Question 9

percentage yield equation

Answer 9

actual product mass / maximum theoretical product mass x 100

Question 10

reversible reaction, reactants not pure, product lost, alternative reaction

Answer 10

factors affecting yield

Question 11

sustainable production

Answer 11

more yield, more efficient, less waste, harmful waste treated before released

Question 12

atom economy

Answer 12

measure of how many atoms of reactants end up in desired product

Question 13

atom economy equation

Answer 13

Mr of desired product / Mr sum of reactants