(chemistry only) Calculate atom economy for a reaction to form a desired product from a balanced equation.

Atom economy is a measure of the efficiency of a chemical reaction in terms of how much of the starting materials are converted into useful products. It is calculated using the formula: atom economy = (Mr of desired product / sum of Mr of all products) x 100. A high atom economy indicates that a greater proportion of reactants are transformed into the desired product, which is important for sustainability and economic viability. This concept helps chemists evaluate and choose reaction pathways that minimize waste and maximize resource use.