Formula
This calculator uses the equation below. Use it as a quick reference when checking setup before solving.
a_i = γ_i x_iPhysical Chemistry
Activity (mole-fraction convention) Calculator
Compute Activity (mole-fraction convention) using a_i = γ_i x_i.
a_i = γ_i x_i
Run this calculator
Leave a nullable field blank to solve for it.
Variable glossary
Gamma I (gamma_i)
Input variable 'gamma_i' for Activity (mole-fraction convention). Set one variable to null to solve for it.
X I (x_i)
Input variable 'x_i' for Activity (mole-fraction convention). Set one variable to null to solve for it.
A I (a_i)
Result variable 'a_i' for Activity (mole-fraction convention). Set to null (or omit) to compute this value.
Worked example
Try these sample values to validate the setup, then replace inputs with your own conditions.
- gamma_i: 2
- x_i: 3
Frequently Asked Questions
What does the Activity (mole-fraction convention) calculator solve?
It solves Activity (mole-fraction convention) problems in physical chemistry using your provided inputs and computes unknown values when nullable fields are left blank.
Do I need to convert units before using this tool?
Use the unit toggles where available (for example K/C and L/mL). ChemGenius converts values to the calculator's base units automatically before solving.
Can I save this result in my workflow?
Yes. After computing a result, you can continue into ChemGenius workflows like protocol drafting or notes to keep your calculation context attached to downstream work.