Molar mass of N2H4 = 32 grams/mole
3.95 grams of N2H4 = 3.95/32
= 0.123 moles
This will produce 0.123 moles of N2
Now,
From the gas law equation.
P.V = n x R x T
P = 1 atm (given)
V = 0.123 x 0.082057 x 295
V = 2.97 Liters
Theoretical yield = 2.97 Liters.
Actual yield = 0.750 Liters
percentage yield = (0.75/2.97) x 100 %
= 25.25 %
