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OpenStudy (anonymous):
If 20.0 grams of Ca combines completely with 16.0 grams of S to form a compound, what is the percent composition of Ca in the compound? a. 1.25% c. 44.4% b. 20.0% d. 55.6%
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OpenStudy (petiteme):
Get first the total mass :)
OpenStudy (petiteme):
of the compound*
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