Question

What is the mass of CO2 in atomic mass units?

28 amu
44 amu
12 amu
22 amu

Answer 1

The mass of CO2 in atomic mass units is 44 amu, which is calculated by adding the atomic mass of one carbon atom (12.011 amu) and two oxygen atoms (16.00 amu each).

Step-by-step explanation:

The mass of CO2 in atomic mass units (amu) is calculated by adding the atomic masses of one atom of carbon (C) and two atoms of oxygen (O). The periodic table lists the atomic mass of carbon as 12.011 amu, and oxygen as 16.00 amu per atom. Therefore, the molecular mass of CO2 is:

12.01 amu (carbon) + 2 × 16.00 amu (oxygen) = 44.01 amu

Hence, the mass of CO2 in atomic mass units is 44 amu.

Answer 2

44 amu because oxygen has an atomic weight of 16, and 16 plus 16 is equal to 32, and the atomic mass of carbon is 12, and 32 plus 12 is 44.