chalk contains 3% of carbon 10% of calcium and 12% of oxigen find the amount in grams of each of these substances in 1 kg of chalk

Chalk contains 10% calcium, 3% carbon and 12% oxygen. Find the amount of carbon and calcium (in grams) in 2""1/2" kg of chalk.

an alloy contains 20% copper 40% zinc and the rest nickel find the grams the quanitity of each of the contents in 1 kg of alloy.

Gunpowder contains 75% of nitre and 10% of sulphur and the rest of it is charcoal find the amount of charcoal in 8 kg of gunpowder

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

An alloy contains 36% zinc, 40% copper and the rest is nickel. Find in grams the quantity of each of the contents in a sample of 1 kg alloy.

An alloy contains 36% zinc, 40% copper and the rest is nickel. Find in grams the quantity of each of the contents in a sample of 1 kg alloy.

Gunpowder contains 75% of nitre and 10% of sulphur,and the rest of it is charcoal.Find the amount of charcoal in 8 kg of gunpowder.

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

Chalk contains calcium, Carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk.

Balanced diet should contain 12% of proteins, 25% of fats and 63% of carbohydrates. If a child needs 2600 calories in his food daily, find in calories the amount of each of these in his daily food intake.