# chemistry

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Copper (II) flouride contains 37.42% F by mass. Use this percentage to calculate the mass of flourine (in grams) contained in 35.6 g of copper (II)fluoride.
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How many grams of Cl are present in 55g of CFCl3?

• chemistry -

You (or another anonymous) asked this question a couple of days ago. The answer is the same.
If CuF2 is 37.42% by mass of F, then 35.6 grams must contain 37.42% of 35.6 g. Don't forget to change percent to a decimal.

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