Mole Fraction Calculator

What Mole Fraction is for

Mole Fraction Calculator is the page to open when you need mole fraction from measurements you already have. It belongs with the other science calculators because that is the work this arithmetic supports. The molar mass those moles are divided by is the molar mass calculator. Type the entries first. The result stays hidden until you press Calculate, so a half-finished form never flashes a number you might mistake for the answer.

How to fill in this calculator

1. Solute. Enter the value this part of the job needs. The unit list on this field includes mol, mmol, μmol, nmol, pmol.
2. Solvent. Enter the value this part of the job needs. The unit list on this field includes mol, mmol, μmol, nmol, pmol.

The formula in plain language

To add fractions, convert them to a common denominator, add the numerators, and reduce. A mixed number is a whole plus a fraction. Multiply the whole by the denominator and add the numerator before you do arithmetic. A ratio a:b = c:d solves for the missing term by cross-multiplying. Long division splits a number into a whole quotient and a remainder.

A worked example

1/2 plus 1/3 is 5/6. The mixed number 2 1/4 is 9/4. If 2:3 equals 8:d, then d is 12. 100 divided by 6 is 16 with a remainder of 4, or 16.666....

Moles, molar mass, and yield are one chemistry problem. This mole fraction result belongs with moles from a count of atoms and liters to moles.

Mistakes that move the answer

• A denominator of zero is not a fraction.
• Reduce the answer if you are comparing it with a tape that is marked in sixteenths.

How to check the result

After Calculate shows the mole fraction result, redo the last operation with a pencil using the rounded figures on the screen. Matching that check means the inputs were read correctly. If you edit a label or a sentence in this HTML file, reload the page. The form and this article both live in the file, so the edit is what visitors will read.