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Q.

Mass of one atom of the element A is 3.9854 x 10^-23 g. How many atoms are contained in 1 g of the element A?

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a

2.509 x 10²³

b

6.022 x10²³

c

12.044 x10²³

d

None of these

answer is D.

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Detailed Solution

3.9854 x10^-23 g of element = 1 atom
1 g of element $= \frac{1}{3 .9854 \times 10^{- 23}}$

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