Question #3c8e3

1 Answer
Henry W.
Oct 2, 2016

By converting to moles then to litres, we get 40L

Explanation:

Recall that the atomic mass of an element corresponds to its molar mass in grams. For nitrogen (14 AMU), 1 mole = 14g. Now since it's the nitrogen molecule, the molar mass would be 28g (2 nitrogen atoms per molecule).

  1. Calculate the moles of #N_2# in 50g
    We divide the mass by the molar mass to get moles
    #(50g)/(28gmol^-1)# = 1.78571... mol
  2. Now using the molar volume of a gas at STP (which is #(22.71 L)/(mol)#), we can convert the moles of nitrogen into the volume of nitrogen.
    #1.78571... mol# x #(22.71 L)/(mol) = 40.55... L#

It seems like your answer has been rounded down to 40L

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