Stoichiometry Calculation Question

Question

N2 + 3H2 --> 2NH3

9.7g H2 times x/x times x/x times x/x = 55g NH3

"x" options: 17 g NH3, 2 mol NH3, 1 mol NH3, 3 mol H2, 1 mol H2, 2 g H2

Answer 1

Never seen a question phrased like this, so not really sure what's expected. What does x/x times x/x mean? Are you trying to convert 9.7 g H2 to 55 g NH3?

9.7 g H₂ x 1 mol H₂/2 g x 2 mol NH₃/3 mol H₂ x 17 g NH₃/1 mol NH₃ = 55 g NH₃

So you can figure out where the x values are.