chalk contains 10% calcium 3% carbon and 12% oxygen find the amount in grams of each of these components in 250 grams of Chalk
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Answer:
Given, percentage of calcium in chalk = 10%
Percentage of carbon in chalk = 3%
Percentage of oxygen in chalk = 12%
∴ weight of chalk =
2 (1/2)kg )=
5/2kg
= 2.5 × 1000 = 2500gm
⇒ Amount of carbon in chalk = 3% of 2500 =
3/100× 2500
= 75
⇒ Amount of Calcium in chalk = 10% of 2500 =
10/100× 2500
= 250
∴ amount of carbon and calcium respectively is 75 and 250
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