How many grams of H2 are needed to react with 1.80 g of N2?

Answer 1

Start with a balanced equation: N₂ +3H₂ --> 2NH₃

Start with given information, convert to moles, use the mole ratio, and convert back to grams

1.80 g N₂ x 1 mol N₂/28.014 g N₂ x 3 mol H₂ / 1 mol N₂ x 2.0158 g H₂/ 1 mol H₂

.389 g H₂