Question

What is the molar mass of carbon dioxide (in units of g/mol)? Your answer should have the appropriate number of significant figures (use two decimal places in atomic masses). Only give the numeric value of your answer. Don't include the units.

Answer 1

The molar mass of carbon dioxide (CO₂) is 44.009 g/mol, calculated by summing the molar masses of one carbon atom and two oxygen atoms.

Step-by-step explanation:

The molar mass of carbon dioxide (CO₂) can be calculated by adding together the molar masses of its constituent elements, carbon (C) and oxygen (O). The atomic mass of carbon is given as 12.011 amu, and since the periodic table lists the average molar mass of carbon as the mass of 6.022 × 10²³ carbon atoms, it is equivalent to 12.011 g/mol. Oxygen's atomic mass is 15.999 g/mol, and since there are two oxygen atoms in carbon dioxide, their combined molar mass is twice the atomic mass of oxygen. Therefore:

Molar mass of CO₂ = (1 × 12.011 g/mol) + (2 × 15.999 g/mol) = 44.009 g/mol