Question

what is the mass of co₂ in atomic mass units?
a. 22 amu
b. 12 amu
c. 44 amu
d. 28 amu

Explanation:

Step1: Identify atomic masses of elements

The atomic mass of carbon (C) is approximately 12 amu, and the atomic mass of oxygen (O) is approximately 16 amu.

Step2: Calculate mass of CO₂

In CO₂, there is 1 carbon atom and 2 oxygen atoms. So the mass of CO₂ = 12 amu (for C)+ 2×16 amu (for 2 O atoms) = 12 + 32 = 44 amu.

Answer:

C. 44 amu