Question

Nitrogen and hydrogen combine together to form ammonia. 

N₂ + 3H₂→ 2NH₃ 

[Relative atomic masses of N = 14 u, H = 1 u] 

The mass of nitrogen and hydrogen which combine together to form 6.8 g ammonia is 

A. N₂ = 2.8g, H₂ = 4.0g 

B. N₂ = 5.6g, H₂ = 1.2g 

C. N₂ = 4.0g, H₂ = 2.8g 

D. N₂ = 12g, H₂ = 5.6g

Answer 1

If N₂ = 5.6g, H₂ = 1.2g 

According to the law of conservation of mas, 5.6g + 1.2g = 6.8g of ammonia 

Hence, the option (b) is correct