Question

A student found that 1.00g of a metal combined with 0.65g of oxygen to form an oxide of the metal. Calculate the percent of metal in the oxide.

Answer 1

To calculate the percent of metal in the newly formed oxide, we consider conservation of mass, so the end product will be 1.65 grams of metal oxide, of which 1.00 gram is metal and 0.65 grams are oxygen.

Taking this into consideration, percent composition of metal on the metal oxide will be given by:

% composition = grams of metal / grams of metal oxide * 100

% composition =​ 1.00 grams of metal / 1.65 grams of metal oxide * 100

% composition =​ 0.606 * 100% = 60.6%