math

Chalk contains calcium,carbon and oxygen in the ratio 10:3:12.Find the percentage of carbon in a chalk and in a stick of chalk, carbon in 3g what is the length of chalk stick?

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asked by Ashish
  1. no idea what the length of the chalk stick is, since you have given neither density nor size.

    All we know is that the carbon is 3/25 = 12% of the total mass.

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    posted by Steve
  2. carbon is 3/25 = 12/100 = 12%

    No idea. You did not tell me the diameter of the stick.

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    posted by Damon

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