Question

How many moles of ammonia is required to react with excess 

sulfuric acid, H2SO4 to produced 1.4 grams ammonium 

sulfate, (NH3)2SO4?

Answer 1

$2NH _ 3 ​ +H _ 2 ​ SO _ 4 ​ →(NH _ 4 ​ ) _ 2 ​ SO _ 4 ​$

The molar mass of ammonium sulfate is 132.14 g/mol.

Moles of ammonium sulphate $=\frac{1.4}{132.14}=0.011moles$

Moles of ammonia $= 2×0.011=0.022moles$