1. Imagine you have a sealed 20.0 L balloon filled with helium gas at 750 mmHg in the house at 25°C.
a. If you brought it outside on a winter day and its temperature dropped to -10°C.
Determine the volume of the balloon. Assume that the pressure in the balloon will stay
constant.

17.6510 L

Explanation:

First we should get the number of moles of helium here by Boyle's law

PV=nRT

P=750/760= 0.9868 atm

T=25+273=298 kelvin

R= 0.08206

V= 20L

so

n=PV/RT

n=0.9868×20/0.08206×298

n=0.80707 mol

Then use the same law

V=0.80707×0.08206×263/0.9869=

17.6510L

SO THE VOLUME WILL BE 17.6510 L

the answer is the first option

explanation:

just googled it m8. not that hard

lol