Answer: 134g NH3
Step-by-step explanation:
Diatomic Hydrogen has a mass of 2.016g/mol
to find how many moles of H2 we have divide how much we have by the molar mass.
23.5g/2.016= 11.66 moles
the ratio between H2 moles and NH3 moles is 3 moles of H2 produce 2 moles of NH3 so we multiply using a 2/3 ratio to find how many moles of NH3 we have
11.66mol H2 x (2molNH3/3molH2) = 7.77 moles NH3
now we multiply the number of moles of NH3 by the molar mass of NH3 (17.3g/mol) to find how many grams of NH3 we have.
7.77 x 17.3g = 134.4g NH3 or using 3 sig figs 134g NH3