it says: calculate the number of grams of NH3 produced when 21.0 g of H2 react with N2.

Answer 1

1. write the equation and balance it. I will help.
3H2 + N2 ==> 2NH3

2. Convert 21.0 g H2 to moles. moles = grams/molar mass.

3. Using the coefficients in the balanced equation, convert moles H2 to moles NH3.

4. Now convert moles NH3 to grams. # grams = moles x molar mass.