We have,
Calcium:Carbon:Oxygen=10:3:12
Then,
Total parts is =10+3+12=25
Now
Carbon%=Carbontotal×100
=325×100
=3×4
=12%
Hence, this is the answer.
Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk.
(i) Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk.
(ii) If in a stick of chalk, carbon is 3g, what is the weight of the chalk stick?