Classify each of the observed changes according to whether or not they are likely to represent evidence that a chemical
reaction is occurring when performing an experiment.

May be evidence of a chemical reaction

Not evidence of a chemical reaction

Answer Bank
a solid liquifying
precipitation
change in temperature
solution colors mixing
a solution color becoming less intense due to dilution
bubbles (gas formation)
changes in color
explosion or fire

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.