What is the formula mass,to the nearest whole number,for sodium nitrite,NaNO₂?

Name: What is the formula mass,to the nearest whole number,for sodium nitrite,NaNO 2 ?
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Question

Quizplus · Accepted Answer

The formula mass of a compound is calculated by summing the atomic masses of all the atoms in its formula.

Na: atomic mass = 23 
N: atomic mass = 14 
O: atomic mass = 16

Formula mass = (23 + 14 + 16 + 16 + 1 + 1 + 12 + 1 + 12 + 0) = 91

Rounding to the nearest whole number gives a formula mass of 69 amu, which is closest to option C).

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