Calculating a particles most probable speed

1. Apr 24, 2008

TFM

[SOLVED] Calculating a particles most probable speed

1. The problem statement, all variables and given/known data

Diatomic carbon dioxide gas (CO2) has molar mass of 44.0 g/mol is at a temperature of 281 Kelvin.

Calculate the most probable speed .

2. Relevant equations

$$V_m_p = \sqrt{\frac{2*k_B*t}{m}}$$

3. The attempt at a solution

$$V_m_p = \sqrt{\frac{2*(1.3807*10^-^2^3)*281}{44}}$$

I have also tried with

$$V_m_p = \sqrt{\frac{2*(1.3807*10^-^2^3)*281}{0.044}}$$

with m in kg/mol, but to no avail. I am sure this is the right equation,

TFM

2. Apr 24, 2008

Nick89

The m stands for mass, not mass per mol!

Convert the 44g/mol to kg first.

3. Apr 24, 2008

TFM

It doesn't specify the number of moles, so is it the mass of an individual particle?

TFM

4. Apr 24, 2008

TFM

I've just checked and it is.

thanks Nick89