The substance methane has the following properties: normal melting point: 90.7 K normal boiling point: 109.1 K triple point: 9.2×10-2 atm, 90.6 K critical point: 45.7 atm, 190.7 K At temperatures above 190.7 K and pressures above 45.7 atm, CH4 is a . CH4 does not exist as a liquid at pressures below atm. CH4 is a at 9.20×10-2 atm and 117.0 K. CH4 is a at 1.00 atm and 106.0 K. CH4 is a at 8.62 atm and 82.7 K.

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.

5.6⋅10−^19  j

do you need the explaination?

it is reliable if two scientists recorded it