A student used a carbon pencil to write his homework .The mass of this was found to be 5 mg. Find the number of moles of carbon in his homework writing.
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Answer:
0.0416 moles
Explanation:
Mass of pencil found = 5mg = 5*10^-3 g
No of moles present in 5*10^-3g = 5*10^-3/12 = 0.416*10^-3 = 4.6*10^-2 moles = 0.0416 moles
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