Question

The molecular mass of sodium oxide (Na2O) is A. 61.97894. B. 38.98917. C. 22.98977. D. 45.97954

Answer 1

Answer is: The molecular mass of sodium oxide is A. 61.97894.

M(Na₂O) = 2 · Ar(Na) + Ar(O).

M(Na₂O) = 2 · 22.98976 + 15.9994.

M(Na₂O) = 61.97894; molecular mass of sodium oxide.

Ar is relative atomic mass (the ratio of the average mass of atoms of a chemical element to one unified atomic mass unit) of an element.

Answer 2

The answer is "A" because Na = 22.9 and O =16 so it is 22.9*2+16