to find:
the volume of ammonia produced at STP.
solution:
Mass of hydrogen is 32.6g
Molar mass of H2 = 2 g/mol
Moles of H = 32.6g/2g/mol = 16.3mol
N2(g) + 3H2(g) —-> 2NH3(g)
The Mole ratio of H to NH3 is 3 : 1
32.6 mole of H = 1/3 x 16.3= 10.87 mol = 5.43mol
Moles of NH3 = 5.43mol
At STP moles = volume/molar volume, but molar volume = 22.4L/mol
Moles = volume/molar volume, volume = moles X molar volume
Volume = 5.43 mol x 22.4L/mol
= 121.63 L
Volume of NH3 = 121.63L
