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Answer:In chemistry, the molar mass is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles. The molar mass is a bulk, not molecular, property of a substance. ... However, for historical reasons, molar masses are almost always expressed in g/mol.
Explanation:mass of 0.5 moles of N₂ = 14 grams .
36.46 g/mol
48g of Helium
Atomic mass of He = 4
Number of particles = Number of Moles x N (Where N is Avogadro number)
= (given weight/ Gram atomic weight) x 6.023 x 10^23
= (4/48)x 6.023 x 10^23
= 6.023 x 10^23/12
= 0.5 x 10^23 Helium particles
∴ 48 g of He contains 12.046 x 10^23 moles.
30.07 g/mol
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