Section 3: Calculating the Total Number of Moles

If you know the mole fraction of a component and the number of moles of that component, you can find the total number of moles present.




How many moles are there altogether in a solution if there are 0.7 moles of Ascorbic Acid and this is a mole fraction of 0.0047? Answer to 1 decimal place.

Click to Remove Question

There are 148.9 moles altogether.

Mole Fraction of A =                Number of Moles of A               
Total Number of Moles of All Components

which rearranges to:
Total Number of Moles = Number of Moles of A
Mole Fraction of A
Total Number of Moles =     0.7    
0.0047
Total Number of Moles = 148.93 = 148.9 moles to 1 dec pl

Click to Continue