Now the concept of the mole fraction which is represented by the variable X represents the mole component divided by your total moles. Now mole component itself represents the element or compound whose mole fraction you must determine.

Taking this information, we now have our mole fraction formula, a whole fraction again, which is X=mole componenttotal moles. So what they're asking to find the mole fraction of divided by your total moles.

Now that we know the formula for mole fraction, continue on to the next video and let's take a look at an example question.