You are working as a nuclear physicist and are performing research on mirror isobars. mirror isobars are pairs of nuclei for which z1 = n2 and z2 = n1 (the atomic and neutron numbers are interchanged). you wish to investigate the independence of nuclear forces on charge by comparing binding-energy measurements in the laboratory on mirror isobars against a theoretical value for the difference in binding energies. you first find the theoretical difference in binding energies for the two mirror isobars 137n and 136c. (enter the magnitude of the difference in mev.)

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.