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2015-02-08T20:15:26+05:30

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 5 moles of N₂ has highest mass.

 mass of 1 mole N₂ = 28g
    mass of 5 mole 
N₂ = 28×5 = 140g
1 5 1
DEAR I WANT EXPLANATION ALSO OK
yaar thewn tps wrote 19.92 so which is correct????????????????????????????????????????
2015-02-11T00:40:10+05:30

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A. Mass of one gram atom of iron = Atomic mass of iron = 55.84 g b. Mass of 5 moles of N₂ = 5 × 28 = 140 g #As, one mole of N₂ weighs 28 g. c. Mass of 10²⁴ carbon atoms = (12 × 10²⁴)/(6 × 10²³) = 20 g #As, 6 × 10²³ carbon atoms weigh 12 g. d. Mass of 44.8 lit. of He at STP = (44.8 × 4)/(22.4) = 8 g #As, 22.4 lit. of He at STP weighs 4 g. Hence, option b is the correct answer. 5 moles of N₂ has the highest mass.
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I am sorry, the answer is so clumsily presented...eww..! :/
na its alright :)