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Chalk contains calcium carbon and oxygen in the ratio 10:3:12find 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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Answer» 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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