Question

Chalk contain calcium, carbon and oxygen in the ratio of 10: 3: 12 Find the % of each component. If in a stick of chalk, oxygen is 12g.what is the weight of the chalk stick?​

Answer 1

Step-by-step explanation:

Sum of the ratio: 10+3+12 = 25

Calcium's proportion: 10/25 X 100 = 40%

Carbon's proportion: 3/25 X 100 = 12%

Chalk's proportion: 12/25 X 100 = 48%

Answer 2

Answer:

Step-by-step explanation:

(i) Given ratio = 10 : 3 : 12

Total part = 10 + 3 + 12 = 25

Part of Carbon = 3/25

Percentage of Carbon part in chalk = \frac{3}{25}\times100=12\%

ii) Quantity of Carbon in chalk stick = 3 g

Let the weight of chalk be x g.

Then, 12% of x = 3

Hence the weight of chalk stick is 25 g.