Calculating a particles most probable speed

[TFM]

[SOLVED] Calculating a particles most probable speed

Homework Statement

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 .

Homework Equations

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

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

 

[Nick89]

The m stands for mass, not mass per mol!

Convert the 44g/mol to kg first.

 

[TFM]

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

TFM

 

[TFM]

I've just checked and it is.

thanks Nick89