# Stoichiometry Calculator

## About

Retrieve the molar mass of a compound from its chemical formula and convert between mass, volume, pressure, molarity, density, and number of moles. The stoichiometry calculator will calculate all non-arbitrary physical values from any given initial values. For example, inputting *H _{2}O* for the compound and

*2*for the number of moles will give the molar mass of water and the amount of grams contained in 2mol. If a volume is given, the calculator will also be able to calculate the molarity, pressure (assuming the compound is a gas), and density. Gases can be calculated as ideal gases, van der Waals real gases, or Redlich-Kwong real gases.

* For scientific notation, use E*x* to represent 10^{x} (e.g. 1.7x10^{5} would be input as 1.7E5).

* Check your input; inaccurate input value (e.g. nonexist element or unclosed parenthesis) my cause unexpected results.

* Make sure to give values for all required inputs (e.g. if you are inputting a compound's partial pressure, you must also give the system's temperature and volume).

* For reaction stoichiometry, use the Reaction Stoichiometry Calculator.

* For stoichiometry practice problems, visit the Practice Problems section.

## Instructions

- Enter a compound into the
*Compound*box. - If measuring a real gas, select the gas type.
- Enter all known parameters into the remaining boxes. If a value is unknown, leave the value as
*0*. - Select the units of measurement being used.
- Hit
*Calculate*to calculate any remaining data from the input data.