Question #3c8e3

1 Answer
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