Question

How many moles (of molecules or formula units) are in 32.90g CF2Cl2?

Answer 1

First, calculate the molar mass of CF2Cl2
Carbon is 12
Fluorine is 19 x 2=38
Chlorine is 35 x 2= 70
add everything altogether which equals to 120 g/mol
\[32.90 g CF2Cl2 * \frac{ 1 mol }{ 120 g/mol CF2CL2 }\]