Chem question..

[kponenation]

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A 49-gram sample of sulfuric acid,
H2SO4 (98 g X mol-1), contains

A. 1 mol of S atoms.
B. 16.0 grams of O.
C. 2.0 grams of H.
D. 2 moles of O atoms.
E. 1 mole of molecules.

The answer is D.
And now my question is how?
I know there is .5 mol of H2SO4 and 2 equivalents of hydrogen ions but that's about it.

Thanks in advance.

 

[pbure9]

so you're right you do have .5 mol H2SO4. Thats the most important part.
The next step is some dimensional analysis.

.5mol H2SO4 (4 moles O/1 mole H2SO4) = 2 moles O (which is the answer)

It's not A, because its .5 mole S atoms and its actually 1 mole H, which is 1 g H.

Hope that helps

 

[Dentite99]

A 49-gram sample of sulfuric acid,
H2SO4 (98 g X mol-1), contains

A. 1 mol of S atoms.
B. 16.0 grams of O.
C. 2.0 grams of H.
D. 2 moles of O atoms.
E. 1 mole of molecules.

The answer is D.
And now my question is how?
I know there is .5 mol of H2SO4 and 2 equivalents of hydrogen ions but that's about it.

Thanks in advance.

In 1 mole of H2SO4 there is O4 (4 moles of oxygen), therefore in 0.5 moles of the entire molecule there 0.5 moles of the O4 =O2.

 

[kponenation]

DUMB DUMB DUMB...

I knew it was easy... I just can't think straight with 2 weeks left..
Thanks everyone!