How many atoms are in 56 grams of nitrogen?
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Mass of one mole of N2 molecules=14 g
No of moles in 56 grams =56/14= 4 moles
No of molecules in one mole =6.022 x 10^23
No of molecules in 4 moles= 2.408 x 10^24
No of N atoms ina molecule = 2
No of N atoms = 2 x 2.408 x 10^24= 4.816x10^24
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