# 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