How many grams of H2 are needed to produce 11.61 grams of NH3?

Answer 1

a mole of NH3 is composed of one mole of N and three moles of H

find the molar mass of NH3
... find the moles in 11.61 g ... 11.61 g / molar mass

find the moles of H ... three times moles of NH3

find the grams of H ... moles * molar mass