Question

chalk contains 4% calcium 11% carbon and 10% oxygen find the amount in grams of each of the substances in 1 kg of chalk​

Answer 1

Answer:

The amount of chalk = 1 kg = 1000 g

We have, Amount of carbon in it = 3% of 1000 g = (3/100) × 1000 = (3 × 10) = 30 g

Amount of calcium in it = 10 % of 1000 g = (10 /100) × 1000 = (10 × 10) = 100 g

Amount of oxygen in it = 12% of 1000 g = (12/100) × (1000) = (12 × 10) = 120 g

Answer 2

Answer:

4÷100 ×1000= 40g CALCIUM

11÷100×1000= 110g CARBON

10÷100×1000= 100g OXYGEN