Question

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

Answer 1

Answer:

3.36kg

Step-by-step explanation:

Percentage of oxygen in chalk

$100 - (40 + 12) = 100 - 52 = 48$

Then amount of oxygen in 8kg chalk

$8 \times 42 \div 100 = 3.36$

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