Q.

Which of the following has the highest mass?

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a

44.8 litre of He at STP

b

One gram atom of Iron

c

5 moles of N2

d

104 carbon atoms

answer is B.

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Detailed Solution

One gram atom of iron contains 56 grams of iron.

5 moles of N2 contain 140 grams of nitrogen.

104 carbon atoms contain 120 grams of carbon.

44.8 Litres of He contains 8 grams of helium.

N2 has the highest mass. Hence, the correct option is (B) 5 moles of N2.

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