Start with the balanced chemical equation
Now, take the mole ratio one of the reactants (you can pick either one) has with all the other compounds in the reaction, this will help you determine whether or not you have a limiting reagent and exactly how much of each product is made in the reaction.
Take, for instance,
So, the number of moles of
Even before calculating the actual number, we've established that you would need
If you have less than this, chlorine will be the limiting reagent; if you have more, aluminium bromide will be the limiting reagent.
The number of moles of chlorine can be determined using the molar volume of a gas at STP; under these conditions, 1 mole of any ideal gas occupies
You have way more than the required 0.2678 moles of chlorine, which means that the aluminum bromide will act as the limiting reagent. This means that you'll have excess chlorine
The volume of chlorine that will still be in the container after the reaction is complete is
Now for the products. Once again use mole ratios to determine how many moles are produced
The mass produced will be
Therefore, the container will have