sciencegod

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Nov 21, 2008
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i think there should be a thread with all thw mistakes in all the review books.
i just did a practice test in the chem in the barrons book and its full of mistakes.

which ion is isoelextronic with Ba+2?
I wrote I. but they had equally good choice Cs. they marked it as xe whic is silly.

mistake in q 58 in model exam 1 chem.
how many C atoms in 4*10^-8 of C3H8?
I wrote 1.64*10^15. they marked it as something else.

q 62 is wrong

q 66 wrong

how is orientation of the bond bet the two sp2 carbons in ethene best described in relation to the orientation of pi bond.

I think answe is perpendicular, no?
 

Sublimation

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Jun 14, 2008
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  1. Pre-Dental
i think there should be a thread with all thw mistakes in all the review books.
i just did a practice test in the chem in the barrons book and its full of mistakes.

which ion is isoelextronic with Ba+2?
I wrote I. but they had equally good choice Cs. they marked it as xe whic is silly.

mistake in q 58 in model exam 1 chem.
how many C atoms in 4*10^-8 of C3H8?
I wrote 1.64*10^15. they marked it as something else.

q 62 is wrong

q 66 wrong

how is orientation of the bond bet the two sp2 carbons in ethene best described in relation to the orientation of pi bond.

I think answe is perpendicular, no?

I have the barrons book but i didnt bother goin through it yet. However, the last question is a bit ambiguous. The Sigma bond is parallel relative to the pi bond. Its a pretty weird question if you ask me.
 
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