Question

How many moles are in 55.98g CF2Cl2

Answer 1

No of moles = given mass ÷ molecular mass
n = 55.98 ÷ (12+19×2+35.5×2)

Answer 2

Explanation:

Number of moles are defined as the mass divided by molar mass.

Mathematically,       No. of moles = $\frac{mass}{\text{molar mass}}$

It is given that mass is 55.98 g and molar mass of $CF_{2}Cl_{2}$ is 120.91 g/mol.

Therefore, calculate the number of moles as follows.

              No. of moles = $\frac{mass}{\text{molar mass}}$

                                   = $\frac{55.98 g}{120.91 g/mol}$

                                   = 0.462 mol

Thus, we can conclude that there are 0.462 moles present in 55.98g of $CF_{2}Cl_{2}$.