Question

6) Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage
of carbon in chalk.
(i) Ifin a stick of chalk, carbon is 3g, what is the weight of the chalk stick?​

Answer 1

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Answer 2

your answer is

ratio of calcium , carbon and oxygen is 10:3:12

add all numbers in ratio

10+3+12

25

percentage of carbon is3/25 ×100 = 12

(2)  let the weight of stick be x

12/100 × x = 3

x = 25 g

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