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## Homework Statement

Find the pressure and temperature when given the following data on helium gas:

Volume (V) = 0.10 m^3 ** Helium mass (m) = 4.0 amu ** Number of atoms (N) = 3.0 x 10^24

Assuming PV = 1 then P=1/V then Pressure = 1.0 / 0.10m^3 = 10Pa

## Homework Equations

PV = NkT arranged for T = PV/Nk OR PV = nRT arranged for T = PV/nR

## The Attempt at a Solution

Mm = Mr x 10-3 = 4.0 x 10-3 so the mass is 4.0 x 10^-3 / 6.02 x 1023 = 6.6 x 10^-27

The temperature T is then:

T = PV/Nk

T = P x 0.10m^3 / 3.0 × 10^24 mol−1 x 1.381 × 10^−23 J K−1

But I have no idea how to get Pressure - Ive tried using Boyles law PV = constant but get lost

Any pointers would be deeply appreciated