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boyakko [2]
3 years ago
7

Which of the following pairs does not share the same empirical formula?

Chemistry
2 answers:
vova2212 [387]3 years ago
8 0

The correct answer is PbCl_2 and PbCl_4.  If you divide all atoms of PbCl_4 by factor 4 it gives PbCl which is not the same as PbCl_2.

If you divide all atoms of C_3H_6O_3 by 3 you get the other pair CH_2O

If you divide all atoms of N_2O_4 by 4 you get the other pair NO_2

and if you divide all atoms of C_3H_1_2 by 3 you get the other pair CH_4

Svetradugi [14.3K]3 years ago
5 0
PbCl2 and PbCl4

Empirical formula is when the molecular formula is reduced (each element) by the same number until you are unable to do so any further.
CH2O cannot be further reduced, but C3H6O3 can all be divided by 3 making it CH2O (same empirical formula)
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t=\frac{2.303}{k}\log\frac{a}{a-x}

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Answer:

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The reaction has the value for ∆H = negative , and ∆S = negative ,

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