A - 1mg of C 4 H 10

B - 1mg of N 2

C - 1mg of Na

D - 1ml of H 2 O

 

Answer

D - 1ml of H 2 O

 

Explanation:

 

1mg of C 4 H 10 (14 atoms in 1 molecule) = (14 x N x 10 -3 ) / 58 = 2.41 x 10 -4 x N atoms

1mg of N 2 (2 atoms in 1 molecule) = (2N x 10 -3 ) / 28 = 7.14 x 10 -5 x N atoms

1mg of Na (1 atom in 1 molecule) = (N x 10 -3 ) / 23 = 4.34 x 10 -5 x N atoms

1ml of H 2 O (3 atoms in 1 molecule) = 1g of H 2 O = 3N / 18 = 2.41 x 10 -4 x N atoms

 Thus 1ml of H 2 O has largest number of atoms

  1. Class 9
  2. Chapter 3 Class 9 - Atoms And Molecules (Term 2)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo