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| 1. |
chalk contains calcium carbon and oxygen in the ratio 10 ratio 3 ratio 12 find the percentage of calcium in Chalk |
| Answer» EXPLANATION:calcium : carbon : oxygen 10 : 3. : 12 X. : 3 MG. : y carbon = 3 mg 1 = 1 mg 10 + 12 +3 = weight of chalk 10 mg + 12 mg + 3 mg 25 mg. is it answer | |