Answer:
we have to double the pressure.
Explanation:
b/c according to boyle's" the volume of a given mass of gas is inversely proportional to its pressure in a constant temperature.
P1*V1=P2*V2
we have P1=1 atm because it is at STp
V1=50L
V2=25L because we want to cut the volume of the gas in half .
and we can find P2
from the above formula we have P2=P1*V1/V2
P2=1*50/25=50/25=2
so when we doubled the pressure the volume will be halved.
