Homework Help: chemistry

Posted by Abbie on Sunday, April 24, 2011 at 4:36pm.

The atomic mass of iron oxide is 160 atomic mass units. What is the atomic mass of iron if a molecule of iron oxide consists of tow atoms of iron and three atoms of oxgen?

chemistry - Damon, Sunday, April 24, 2011 at 4:46pm
let us assume that O is 16
then 3 O = 48
then I +48 = 160
I = 160-48
Physics - Abbie, Sunday, April 24, 2011 at 4:49pm
Damon,
Is the answer the same with 2 atoms of iron?
Thank you so much....

The atomic mass of iron oxide is 160 atomic mass units. What is the atomic mass of iron if a molecule of iron oxide consists of two atoms of iron and three atoms of oxgen?
chemistry - Damon, Sunday, April 24, 2011 at 4:51pm
Oh sorry
2 I = 160 - 48
chemistry - Damon, Sunday, April 24, 2011 at 4:54pm
That is 56 which is what you will find if you look up the atomic mass of iron using Google

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