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Starting Points Only: (1) grams of reactant or product -- use molar mass of R or P -- (2) moles of reactant or product

Ending points only -- use mole ratio from equation -- (3) moles of NEW reactant or product -- use molar mass of new R or P -- (4) grams of NEW reactant or product

EXAMPLES

1. Methanol (CH[sub]3[/sub]OH) is made by reacting carbon monoxide and hydrogen in the presence of a catalyst. How much methanol (in GRAMS) can be produced from 40.0 grams of the poisonous gas?

40.0 g CO × 1 mol CO⁄28 g CO × 1 mol CH[sub]3[/sub]OH⁄1 mol CO × 32 g CH[sub]3[/sub]OH⁄1 mol CH[sub]3[/sub]OH

= 45.7 g CH[sub]3[/sub]OH