Question

combined gas law
ntained in a thick - walled
e temperature of the room isesulting in the following
r the balloon.
which variable is held constant in this
situation?
ssure changes from 1.21 atm
atm.
me changes from 3.75 l toperature changes from 293 k
known temperature.
pressure
temperature
moles
volume

Explanation:

The Combined Gas Law relates pressure (P), volume (V), and temperature (T) of a gas, assuming the amount of gas (moles, n) is constant. The left text mentions changes in pressure, volume, and temperature, so these are variable. The only unchanging variable is the number of moles of gas in the balloon.

Answer:

moles