Question

Given 20.0g CF₂ I_2I How many atoms of C? How many grams of C?

Examples of Mol...

Answer 1

The molecule is CF2I2:

Molecular weight = 303.8 g/mol

Total weight = 20.0 g. Thus number of moles = mass in g / mol. wt. in g/mol = 20.0 / 303.8 = 0.06583 moles

Each molecule contains one carbon atom. so 1 mole of molecule contains 1 mole of Carbon and 0.06583 moles should contain 0.06583 moles of carbon.

Thus 0.06583 moles of C, mass of carbon = moles of Carbon * atomic weight of carbon = 0.06583*12.01 = 0.791 g of carbon.

Thus 20.0 g of CF2I2 contians 0.791 g of carbon.