Step 1: calculate theoretical yield in mol
Molar mass of N2H4,
MM = 2*MM(N) + 4*MM(H)
= 2*14.01 + 4*1.008
= 32.052 g/mol
mass of N2H4 = 2.45 g
mol of N2H4 = (mass)/(molar mass)
= 2.45/32.05
= 7.644*10^-2 mol
According to balanced equation
mol of N2 formed = moles of N2H4
= 7.644*10^-2 mol
Step 2: calculate actual yield in mol
Given:
P = 1.0 atm
V = 0.95 L
T = 295.0 K
find number of moles using:
P * V = n*R*T
1 atm * 0.95 L = n * 0.08206 atm.L/mol.K * 295 K
n = 3.924*10^-2 mol
Step 3:
% yield = actual yield * 100 / theoretical yield
= (3.924*10^-2)*100 / (7.644*10^-2)
= 51.3 %
Answer: 51.3 %
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