Select the correct numerical value for the formula mass, in amu, of CO₂.

Question

Quizplus · Accepted Answer

The formula consists of 1 carbon (C), 1 oxygen (O), 24 hydrogen (H), and 1 sulfur (S). 
The atomic mass of C is 12.01, the atomic mass of O is 15.999, the atomic mass of H is 1.008, and the atomic mass of S is 32.06. 
Thus, the formula mass is: 
1(12.01) + 1(15.999) + 24(1.008) + 1(32.06) = 44.06 amu 
But we must round to the nearest whole number, so the correct choice is C, 44.0 amu.

Select the Correct Numerical Value for the Formula Mass, in Amu