Question

Calculatethe number of atoms of hydrogen present in 5.6g of urea

Answer 1

Answer: Urea = NH2CONH2. M.wt = 60. 5.6 g urea = 5.6/60 = 0.093 moles. 1 mole of urea contains 4N atoms of H. 0.093 moles contains 0.093 x 4N .

Explanation:

Answer 2

Answer:

1g = 6.26 × 10^26

so 5g = 5 × 6.26 × 10^26

==31.3 × 10^ 26