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Q.

IT the mass of 0.25 moles of an element X is 2.25 g, the mass of one atom of Xis about :

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a

1.5×1024g

b

2.5×1023g

c

1.5×1023g

d

1.5×103

answer is C.

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Detailed Solution

The mass of one atom of X is about

m=2.250.25×1.66×1024

m=1.5 × 10-23g

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IT the mass of 0.25 moles of an element X is 2.25 g, the mass of one atom of Xis about :