Question

If you have 40 grams of H2, how much NH3 can you make?

Answer 1

`"0.785 g"`

Explanation:

`"40 g of H"_2 = "40 g"/"2 g/mol" = "20 mol of H"_2`

Reaction involved in formation of ammonia is

`"N"_2 + "3H"_2 -> "2NH"_3`

2 moles of ammonia requires 3 moles of Hydrogen.

∴ 20 moles of Hydrogen will produce `20 × 2/3 = 40/3\ "mole of NH"_3`

`40/3\ "moles of NH"_3 = (40/3\ "moles")/"17 g/mol" = "0.785 g of NH"_3`