Because this simplified model simplifies many calculations, without having to worry about small (and usually insignificant) differences between individual real gases.
K (Kelvin)
No, no real gas is actually an ideal gas.
There are ideal gases..
units
Use Boyle's law
Strictly speaking no, as an ideal gas is simply a theoretical device. Though it can be treated as an ideal gas to an extent.
V=nRT/P
To find the atomicity of an ideal gas you can use γ = Cp/Cv.
Yes. You should convert grams to moles in order to use the ideal gas law. The units of the other variable, R (gas constant) has moles in it.
the ideal gas constant D:
The Ideal Gas Law PV=nRT
Use the ideal gas law. PV = nRT