Which sample contains the largest number of atoms

Last updated at Dec. 16, 2024 by

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

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo