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If 12.0 grams of C combines completely with 32.0 grams of O to form a compound, what is the percent composition of O in the compound?
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If 12.0 grams of C combines completely with 32.0 grams of O to form a compound, what is the percent composition of O in the compound?

User Bardo
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remember this---> parts over whole

we need to find the total mass first-- > 12.0 grams + 32.0 grams= 44.0 grams

O%= part of oxygen / whole ----> 32.0/ 44.0 x 100= 72.7 %
User Ernest S Kirubakaran
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