What is the mass percent of Chlorine in the compound copper (II) chloride tetrahydrate?

1 Answer
KPaukstis
Mar 13, 2018

34.4%

Explanation:

Calculate the molar mass of compound #CuCl_2*4H_2O#.
It is #206.5 g/(mol)#.
Now find the mass of chlorine in this compound. There are two chlorine atoms in the compound, therefore #2*35.5=71g/(mol)#

If #206.5 g/(mol)# – 100%
then #71g/(mol)# – x%

Cross multiply and get x = #34.4%#

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