Question

8. Chalk contains 10% calcium, 3% carbon and 12% oxygen. The total amount of
these in 1 kg of chalk are
(1)30g, 20g, 10g (2)30g, 100g,120g (3) 100g,30g, 120g (4)400g,120g,480g​

Answer 1

Given

Calcium = 10℅

Carbon= 3%

Oxygen=12℅

Chalk = 1 kg

Formula

1000

$1000 \div 100 \times given \: percent \: f \: element$

For calcium

1000/100*10=100gm

For carbon

1000/100*3=30gm

For oxygen

1000/100*12=120gm

So correct answer is option 3

Thank you

Please make this as brainlist answer....