What is the atomic mass? a: the sum of the protons and neutrons b: the difference of the protons and neutrons c: the sum of the protons and electrons d: the difference of the protons and electrons.

I realize this was asked quite a while ago, but just in case anyone else has the same question, I will answer it.

The answer is A) The sum of the protons and neutrons.

To find the mass of an atom you must add the number of protons with the number of neutrons.

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.