Question

i- Chalk contain calcium,carbon and oxygen in ratio 10:3:12. Find the percentage of carbon in chalk.
ii- If in a stick carbon is 3gm what is the weight of the chalk stick .

Please anyone answer this qustion ​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Answer

(i) Given ratio =10:3:12

Total part =10+3+12=25

Part of carbon =

25

3

Percentage of Carbon part in chalk =

25

3

×100=12%

(ii) Quantity of Carbon in chalk stick =3g

Let the weight of chalk be x g

then, 12% of x=3

⇒

100

12

×x=3

⇒ x=

12

3×100

=25g

Hence the weight of chalk stick is 25g