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In chalk powder calcium, carbon and oxygen ratio are 10 : 3 : 12. Find out the carbon percentage.

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In chalk powder calcium, carbon and oxygen ratio are 10 : 3 : 12. Find out the carbon percentage.

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Calcium : Carbon : Oxygen

10 : 3 : 12

Total of ratio = 10 + 3 + 12 = 25

Parts of carbon in chalk = 3/25

∴ Percentage of carbon in chalk = ( 3/25 x 100)%

= (3 x 40)%

= 12%

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