73.5 grams C, 4.20 grams H, and 72.3 grams Cl. What is the percent composition of each element in this compound?
1 answer:
To find percent composition do "parts over the whole" ---> each individual mass over the total mass times 100 (since it is a percentage).
total mass ("the whole")= 73.5 + 42.0 + 72.3 grams= 150 grams
1. Carbon %= 73.5 grams/ 150 grams x 100= 49.0%
2. Hydrogen %= 4.20 grams/ 150 grams x 100= 2.80%
3. Chlorine %= 72.3 grams/ 150 grams x 100= 48.2%
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