Question

chalk contains calcium, carbon and oxygen in the ratio 10:3:12.find the percentage of oxygen in chalk.​

Answer 1

this is your answer check

Answer 2

$<b><i>$Answer :

It is given in the question that,

Ratio of calcium, carbon and oxygen = 10: 3: 12

Therefore,

Total = 10 + 3 + 12 = 25

Hence,

Percentage of oxygen = 12/25 × 100 %

= 12 × 4 %

= 48 %