What is the mass of 1.5 moles of C{{O}_{2}}?

To calculate the mass of 1.5 moles of carbon dioxide (CO2), you'll need to use the molar mass of CO2.

The molar mass of CO2 is the sum of the atomic masses of all the atoms in one molecule of CO2. CO2 consists of one carbon (C) atom and two oxygen (O) atoms.

The atomic masses are as follows:

Carbon (C): approximately 12.01 grams per mole
Oxygen (O): approximately 16.00 grams per mole
Now, you can calculate the molar mass of CO2:

Molar mass of CO2 = (1 * Molar mass of C) + (2 * Molar mass of O)
Molar mass of CO2 = (1 * 12.01 g/mol) + (2 * 16.00 g/mol)
Molar mass of CO2 = 12.01 g/mol + 32.00 g/mol
Molar mass of CO2 = 44.01 g/mol

Now that you know the molar mass of CO2 is approximately 44.01 grams per mole, you can calculate the mass of 1.5 moles of CO2:

Mass = moles × molar mass
Mass = 1.5 moles × 44.01 g/mol
Mass = 66.015 grams

So, the mass of 1.5 moles of CO2 is approximately 66.015 grams.