Question #79284

Find the no of carbon atom in a 60 grm pencil containing 60â„…graphite?

Expert's answer

m(carbon) =m(pencil)Ã—C% (graphite) / 100 %

m=60Ã—60/100

m=36 grm

So, the pencil contained 36 g of graphite. Graphite is composed of complete carbon atoms. The atomic mass of 1 mole of carbon is 12 grams. Considering this, we create the following proportion

12 grm â€“ 6,02 Ã— 10^23

36 grm â€“ X

X=36 Ã— 6,02 Ã— 10^ 23 / 12

X= 18,06 Ã— 10^ 23

So the answer is 18,06 Ã— 10^ 23

m=60Ã—60/100

m=36 grm

So, the pencil contained 36 g of graphite. Graphite is composed of complete carbon atoms. The atomic mass of 1 mole of carbon is 12 grams. Considering this, we create the following proportion

12 grm â€“ 6,02 Ã— 10^23

36 grm â€“ X

X=36 Ã— 6,02 Ã— 10^ 23 / 12

X= 18,06 Ã— 10^ 23

So the answer is 18,06 Ã— 10^ 23

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