Question

what is the molar mass of carbon dioxide (co₂)?
a. 44.00 g/mol
b. 18.02 g/mol
c. 22.99 g/mol
d. 28.02 g/mol

Explanation:

Step1: Find molar mass of carbon

The molar mass of carbon (\(C\)) is \(12.01\space g/mol\).

Step2: Find molar mass of oxygen

The molar mass of oxygen (\(O\)) is \(16.00\space g/mol\). In \(CO_2\), there are 2 oxygen atoms. So the total mass from oxygen is \(2\times16.00 = 32.00\space g/mol\).

Step3: Calculate molar mass of \(CO_2\)

Molar mass of \(CO_2=M_{C}+2\times M_{O}\). Substitute the values: \(12.01+32.00 = 44.01\space g/mol\approx44.00\space g/mol\) (due to rounding in atomic - mass values in some references).

Answer:

A. \(44.00\space g/mol\)