Question

5. In a chemical reaction 646gram ammonia is reacting with 1.144kilogram carbon

dioxide to give urea? Find the limiting reagent and excess reagent in the reaction?

Calculate the quantity of urea formed? Calculate the the amount of carbon dioxide

which is left unreacted?​

Answer 1

Answer:

2NH

3

+CO

2

→NH

2

CONH

2

+H

2

O

Moles of urea=

60

999.6×10

3

=16.66×10

3

.

∴ Moles of CO

2

=16.66×10

3

.

C

n

H

2n+2

+O

2

→nCO

2

+H

2

O

n

16.66×10

3

×[12n+(2n+2)]=236×10

3

n≅12

∴ Molecular formula of the hydrocarbon=C

12

H

26

.