In order to calculate the percent composition of a compound, you need to determine the weights of its constituent elements. For details and examples, see my previous post Percent Composition.
After determining the weight percentages of a compound's constituent elements, you can now calculate the individual weights of the elements contained in any given weight of that compound.
Percent Composition Calculator does just that. It provides you a quick check on your calculations whether you're solving or composing percent composition problems.
Just give the correct formula, weight and percent purity (if any) of the compound:
Formula. For the most commonly encountered binary inorganic compounds, a message is provided below the formula entry line if you enter their incorrect formula.
Weight. You can use any unit for the weight, meaning if your unit of weight is in grams then the computed weights of the compound's components will also be in grams.
% Purity. It is optional. If you don't enter a value, the application assumes that the compound is pure.
You need to round off the results to the required number of significant digits.
