Tuesday
September 16, 2014

Homework Help: Chemistry

Posted by Laura on Sunday, February 25, 2007 at 9:33am.

If the percentage of arsenic is 76% and the percentage of oxygen is 24% how do I calculate the chemical composition of the oxide of the arsenic?

Thanks

Pretend you have 100 grams of the stuff.

Then 76 grams of As is how many moles?
76/74.9 =1.01 moles.

How many moles is 24 grams of O? 24/16=1.5

Now take the lowest mole number, and divide it into each to get a mole ratio.
As= 1.01/1.01=1
0= 1.5/1.01=1.5
so the ratio is 1/1.5 or in whole numbers, 2/3

As2O3

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

science - an oxide of arsenic = 0.927g 76% arsenic and 24% oxygen calculate the ...
chemistry - I have a chemical composition of As2O3. How do I calculate the mass ...
chemistry - In the commercial production of the element arsenic, arsenic (II) ...
CHEMISTRY HELP ASAP PLEASE!!!!!!!!!!!!!!! - In the commercial production of the ...
chemistry - How do I calculate the mas of oxygen that combines with one mol of ...
chemistry - If the arsenic is 76% and oxygen is 24% how would I calculate the ...
chemistry - how do i calculate %of arsenic and oygen by mass and chem ...
Environment - What is Arsenic pollution? I assume you are talking about higher ...
chemistry - A sample of water is analyzed and found to contain 18.6 ppb of ...
chemistry - what is the molecular formula of oxide of arsenic in its gaseous ...

Search
Members