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(ii) If in a stick of chalk, carbon is 3g, what is the weight of the chalk stick?
Asked by Himangi Last Modified
Answer 
Vishaka Bhutia
Home Tutor
(i) Ratio of calcium, carbon, and oxygen = 10: 3: 12
As 10 + 3 +12 = 25,
Therefore, percentage of carbon =
= 12%
(ii) Let the weight of the stick be x g.
12 % of x = 3
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