Question

what is the maximum mass in grams of NH3 that can be produced by reaction of 1.0g of N2 with 3.0g of H2 via the equation below?​

Answer 1

Answer:

I worked this for someone just a day or so ago but I can't find it. Here is a summary.

This is a limiting reagent (LR) problem and you know that because amounts are given for BOTH reactants.

N2 + 3H2 ==> 2NH3

mols N2 = grams/molar mass = ?

mols H2 = grams/molar mass = ?

Using the coefficients in the balanced equation, convert mols N2 to mols NH3.

Do the same and convert mols H2 to mols NH3.

You can see that mols NH3 produced is not the same; one of the answers must be wrong. The correct value in LR problems is ALWAYS the smaller number and the reagent producing that number is the LR.

Now use the LR value and convert that mols to grams.

g NH3 = mols NH3 x molar mass NH3