Question

Which of the following gives CORRECT order of increasing masses?
(Atomic mass: N = 14, O = 16, Cu = 63).
I. 1 molecule of oxygen
II. 1 atom of nitrogen
III. 1 × 10⁻¹⁰ g molecular weight of oxygen
IV. 1 × 10⁻¹⁰ g atomic weight of copper
(A) II < I < III < IV
(B) IV < III < II < I
(C) II < III < I < IV
(D) III < IV < I < II

Answer 1

A
1 molecule of o2 = 32/6.023× 10^23
1 atom of nitrogen= 28/6.023×10^23
1 ×10^-10 Of oxygen=2×1×10^-10 g
1×10^-10 g of atomic weight of copper