Enter any chemical formula optionally with parenthesis and crystal water as in this example:

La2(CO3)3*8H2O

Please use proper capitalization! NO (nitrogenmonoxide) and No (nobelium) are not the same. Chemical formulas with many levels of parenthesis are accepted. The result of the calculations is shown in a popup window or a new tab.

On recommendation by The International Union of Pure and Applied Chemistry, IUPAC, atomic weights of the elements are taken from the review Atomic weights of the elements 2007, published in Pure Appl. Chem., Vol. 81, No. 11, pp. 2131-2156, 2009.