Chalk contains calcium carbon and oxygen in the ratio 10:3:12
find the percentage of carbon and if carbon is 7gm so what is the weight of chalk stick. Check the question first correctly
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Step-by-step explanation:
let the amount of carbon, calcium, and oxygen present be 3x,10x and 12x.
total amount =3x+10x+12x=25x
so percentage of carbon will be (3x ÷ 25×) × 100%
this will be equal to 12%.
so amount of carbon present is 12%.
now, 3x=7
x=7/3.
amount of calcium = 10x
= 10 × 7 ÷ 3
= 23.33 g
amount of oxygen
= 12x
=12 × 7 ÷ 3
= 28g
amount of carbon=7g.
so weight of chalk = 23.33+28+7= 58.33g
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