Question

chalk contains 10% calcium 3% carbon and 12% oxygen find the amount in grams of each of these components in 250 grams of Chalk​

Answer 1

Answer:

Given, percentage of calcium in chalk = 10%

Percentage of carbon in chalk = 3%

Percentage of oxygen in chalk = 12%

∴ weight of chalk =

2 (1/2)kg )=

5/2kg

= 2.5 × 1000 = 2500gm

⇒ Amount of carbon in chalk = 3% of 2500 =

3/100× 2500

= 75

⇒ Amount of Calcium in chalk = 10% of 2500 =

10/100× 2500

= 250

∴ amount of carbon and calcium respectively is 75 and 250