Question

HELP PLEASE I HAVE TO TURN THIS TEST IN 10 MINUTES
An evacuated cylinder has a volume of 50 liters. If 20 liters of nitrogen gas and 20 liters of oxygen gas are pumped into this evacuated cylinder, how much of the cylinder is filled with the two gases?
Only 80 percent because only 40 out of 50 liters are used.
The entire container because gases will expand to fill it.
Only 80 percent because of the low molecular weight of the two gases.
The entire container because of the low molecular weight of the two gases.

Answer 1

The entire container because gases will expand to fill it.
We know this because gases and liquids take the shape of their container.