What is the percent composition of the u. s quarter, which has the mass of 5.670g

and contains 5.198g Cu and 0.472g Ni

The percent composition of each element can be calculated as follows:

% composition = (mass of element / total mass) * 100

The total mass of the quarter is given to be 5.670 grams

Mass of Cu = 5.198 grams

Mass of Ni = 0.472 grams

Substitute in the above equation to get the mass percentage of each element as follows:

% of Cu = (5.198/5.670) * 100 = 91.675%

% of Ni = (0.472/5.670) * 100 = 8.325%