how many grams of NH3 can be produced from 3.35 mol of N2 and excess H2

Answer 1

N2 + 3 H2 ---> 2 NH3 ... each mole of N2 yields 2 moles of NH3

molar mass of NH3 is 17.031 g ... 2 * 3.35 * 17.031 = ?

remember significant figures...