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

1 Answer
Meave60 ยท dwayne
Oct 7, 2014

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.

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