Question

A 7.99 g sample of hcn is found to contain 0.296 g of h and 4.14 g of n.Find the mass of carbon in a sample of hcn with a mass of 3.40 g .

Answer 1

Answer:

Mass of C in 3.40 g of HCN =1.51 gram.

Explanation:

  Mass of sample of HCN = 7.99 g

  Mass of H in 7.99 g of HCN = 0.296 g

  Mass of N in 7.99 g of HCN = 4.14 g

  Mass of C in 7.99 g of HCN = (7.99-0.296-4.14) = 3.554 g

  Now mass of HCN = 3.40 g

  Mass of C in 3.40 g of HCN = $\frac{3.554}{7.99} *3.40 =1.51 g$

 So mass of C in 3.40 g of HCN =1.51 gram.