Question

11. Chalk contains 40% calcium, 12% carbon and rest oxygen. What is the amount of oxygen in 8 kg of
chalk?​

Answer 1

Answer:

3840g

Step-by-step explanation:

Find 40% of 8kg / 8000g & 12% of 8000g. Add them. Substract from 8000.

Answer 2

Step-by-step explanation:

Total percent of calcium and carbon equals 40 + 12 equals 52 percent.... Remaining percentage of oxygen equals 100 - 52 equals 48 percent.... Amount of oxygen in 8 grams of chalk equals 48 percent of 8 which is equal to 3.84 grams of oxygen...