Problem: Calculate the percent composition by mass of each element in Al(OH)3. Use at least three significant figures.%  Al = %  O =%  H = 

FREE Expert Solution
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FREE Expert Solution

We are asked to calculate for the percent by mass (mass %) of each element in Al(OH)3 and to do that we’re going to use the mass percent formula shown below:

First, we need to get the atomic weights of each element in Al(OH)3 using the periodic table and then calculate its molar mass.


Mass of Al:

94% (378 ratings)
Problem Details

Calculate the percent composition by mass of each element in Al(OH)3. Use at least three significant figures.

%  Al = 


%  O =


%  H = 


Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mass Percent concept. You can view video lessons to learn Mass Percent Or if you need more Mass Percent practice, you can also practice Mass Percent practice problems .

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Based on our data, we think this problem is relevant for Professor Overstreet's class at CSUF.