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13. Chalk contains 10% calcium,3% carbon,and 12% oxygenFind the amount (ingrams) ofthese compounds in 1 kg of chalk. |
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Answer» 1kg=1000gram 1. Calcium(10%)= (10/100)*1000=100 gram 2.carbon (3%)= (3/100)*1000=30 gram 3. oxygen (12%)=(12/100)*1000= 120 gram |
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