Me with these three
some of the newest types of modern appliances are 100% efficient and lose no energy to heat.
true
false
a perpetual motion machine is an invention that has only worked a few times in history.
true
false
thermal pollution occurs when factories use water to cool down their heated machinery, and then release the heated water into rivers and oceans.
true
false

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.