Chalk contains 3% of carbon, 10% of calcium and 12% of oxygen. Find the amount in grams of each of these substances in 1 kg of chalk.
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Answer:
carbon = 30g
calcium = 100g
oxygen = 120g
Step-by-step explanation:
total chalk = 1kg = 1000g
carbon in 1kg chalk = 3/100 × 1000g
= 3 × 10 = 30g
calcium in 1kg chalk = 10/100 × 1000g
= 10× 10 = 100g
oxygen in 1kg chalk = 12/100 × 1000g
= 12 × 10 = 120g
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