Answer to Question #200134 in Chemistry for marianna

Question

How many grams of excess reactant are left over after the reaction is complete?

Answer 1

The reaction occurs between equal numbers of moles of reactants. As a result, to find the mass of the excess reactant, the following equation can be used:

m = n × Mr

where m - mass, n - number of moles of the reactant left over after the reaction ( n = n_i - n_r, where n_i - initial number of moles, n_r - number of moles used in the reaction), Mr - molecular weight of the reactant.