Question

1. chalk cantaind calcium, carbon and oxygen in the ratio 10:3:12. find the percentage of carbon in chalk. 2. If in astick of chalk, carbon is 3g, what is the weight of the chalk stick​

Answer 1

Answer:

3/25*100=12%

let the total weight to be x

12%of x =3

12/100*x =3

x=3*100/12

x=25g

Answer 2

Answer:

3/25carbon in chalk

the weight of the chalk = 3 g +12g +10 g =25gms