The maximum kinetic energy of the emitted electrons is found to be 1.255 eV when a metal surface is illuminated by light with a wavelength of 400 nm. When the same metal surface is illuminated by light with a different wavelength, the maximum kinetic energy of the emitted electrons is found to be 0.634 eV. What is the wavelength of this light in nm

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.

the answers are

c and c

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