(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Neon is a monatomic gas;

Density = 0.900 kg.m^{-3}

Pressure = 1 atm

Temperature = 273K.

Density of liquid neon = 1207 kg.m^{-3}

(i) Calculate the volume occupied by one gram mole of neon at a temperature of 273 K and a pressure of 1 atm.

(ii) Determine the atomic weight of neon.

(iii) Calculate the RMS speed of a neon atom at 273 K.

(iv) Use the density of the liquid to estimate the radius of a neon atom.

----------------------------------------------------------------------------------------

2. The attempt at a solution

i) V = nRT/P = 0.0224m^{3}

ii) n= m/M ∴ m = nM = 1x10 = 10g = 0.01kg

iii) V_{RMS}= √(3RT/M) = 824.98ms^{-1}

iv) third-root(liquid density/mass) = 49.42m <-- Bit big for an atom :s

I am stuck on part iv) however I may have made a mistake further up so I have included the whole question and my working. Please help.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Use the density of the liquid to estimate the radius of a neon atom.

**Physics Forums | Science Articles, Homework Help, Discussion**