how can I find the mass of 0.0225 mole of NH3?
use this conversion:
1 mol NH3 = molar mass of NH3 (found on periodic table)
molar mass of NH3 = mass of nitrogen + 3(mass of hydrogen)
1 mol NH3 = molar mass of NH3 (found on periodic table)
molar mass of NH3 = mass of nitrogen + 3(mass of hydrogen)