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Q.

Which of the following statements is/are correct ?

I) 5 moles of CO2 and 5 moles of H2O have the same mass

II) 100 g of NH3 has more atoms than that present in 100 g of N2 

III) 16 g of solid sulphur contains 3.76×1022 molecules

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a

II and III only

b

I only

c

I and II only

d

III only

answer is B.

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Detailed Solution

II) 100 g of NH3 has more atoms than that present in 100 g of N2 

17g1  moleofNH3

100g?

100×117=5.88moleNH3

28g1  moleN2

100g?

10028=3.57  moleN2

III) 16 g of solid sulphur contains 3.76×1022 molecules

256g6.023×1023

16g?

16×6.023×1023256=3.76×1022molecules

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Which of the following statements is/are correct ?I) 5 moles of CO2 and 5 moles of H2O have the same massII) 100 g of NH3 has more atoms than that present in 100 g of N2 III) 16 g of solid sulphur contains 3.76×1022 molecules