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InterviewSolution
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Which of the following has greater number of atoms 100 gm of N2 or 100 gm of NH3. |
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Answer» No. of moles of atoms = weight / atomic weight.100 gms of N₂ = 100/2 x 14 moles = 100/28 molesNumber of molecules = 100 / 28 x 6.022 x 10²³Molar mass of N₂ = 2 x molar mass of monoatomic NMolar mass of N₂ = 2 x 14.0067 = 28 moles.Number of molecules = 100/28 x 6.022 x 10²³No. of atoms = 2 x 100/28 x 6.022 x 10²³ = 43.01 x 10²³For NH₃ :- 100 gm of NH₃ = 100/17 molesNumber of molecules = 100/17 x 6.022 x 10²³ moleculesNo. of atoms in NH₃ = (1 + 3) = 4 x 100/17 x 6.022 x 10²³ =141.69 x 10²³ atoms.Therefore, NH₃ has more atoms than N₂. |
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