# How many formula units of #CuCl_2# are present in a #12.53*g# mass of the salt?

##### 1 Answer

Feb 15, 2018

Well what is the formula mass of cupric chloride....?

#### Explanation:

The anhydrous salt has a formula mass of

And so we take the QUOTIENT....

...

And so how does this molar quantity help us? Well we know that BY DEFINITION one mole specifies

And so we take the product...

...and we are careful to speak of