A sample of aluminum oxide has a mass of #"6.67 g"#. It was found to contain #"4.78 g Al"#. What is the percent composition of aluminum in the sample?

1 Answer
Oct 7, 2014

Answer:

The sample of aluminum oxide contains 71.7% aluminum.

Explanation:

To calculate the mass percent composition of aluminum in aluminum oxide, you divide the given mass of aluminum by the given mass of aluminum oxide and multiply times 100.

#(4.78color(red)cancel(color(black)("g")))/(6.67color(red)cancel(color(black)("g")))xx100 = 71.7%"#

The sample of aluminum oxide contains 71.7% aluminum.