Answer to Question #140028 in Inorganic Chemistry for khaled

Question

What mass of melamine, C3N3(NH2)3, will be obtained from 124.0 kg of urea, CO(NH2)2, if the yield of the overall reaction is 74.0 % ?
Express your answer to three significant figures and include the appropriate units.

Answer 1

6 (NH₂)₂CO → C₃H₆N₆ + 6 NH₃ + 3 CO₂

M(urea) = 60 kmoles/kg

From 6 x 60 kg of urea it is produced 126 kg of melamine;

From 124.0 kg – X kg

X = 47.95 kg (of melamine)

If the yield is 74% so the mass of melamine will be 47.95 x 0.74= 35.4830kg

Answer: ~35.483kg