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Question

If ‘JAYARAO BANDA’ is written by a graphite pencil, it weighs 3.0 × 10–10 g. How many carbon atoms are present in it? (NA = 6 × 1023)

Options

A.1.5 × 1013
B.5 × 1012
C.2 × 1033
D.1.5 × 1010

Solution

Number of C-atoms =$\frac{3.0 \times 10^{- 10}}{12} \times 6 \times 10^{23} = 1.5 \times 10^{13}$

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