# How many gram of Cl are in 475 g of CaCl?

## Question:

How many gram of {eq}\rm Cl {/eq} are in {eq}475\ g {/eq} of {eq}\rm CaCl {/eq}?

## Molar Mass:

The molar mass is a quantity that is determined as the mass of one mole of a substance. This quantity can be used in order to determine the number of moles of a substance given the mass of a pure substance by simply dividing the given mass by the molar mass.

Determine the mass of Cl in the given amount of CaCl{eq}\displaystyle _2 {/eq} (MW = 110.98 g/mol), by multiplying the mass, {eq}\displaystyle m_{CaCl_2} = 475\ g {/eq}, by the ratio of the molar masses of Cl and CaCl{eq}\displaystyle _2 {/eq}, with values of {eq}\displaystyle MW_{Cl} = 35.45\ g/mol {/eq} and {eq}\displaystyle MW_{CaCl_2} = 110.98\ g/mol {/eq}, respectively. We express the solution as {eq}\displaystyle m_{Cl} = m_{CaCl_2}\times \frac{MW_{Cl}}{MW_{CaCl_2}} {/eq}.

{eq}\begin{align} \displaystyle m_{Cl} &= m_{CaCl_2}\times \frac{MW_{Cl}}{MW_{CaCl_2}}\\ &= 475\ g\times \frac{35.45\ g/mol}{110.98\ g/mol}\\ &\approx 152\ g \end{align} {/eq} 