Which pair shares the same empirical formula? 1. c2h4 and c6h6 2. ch2 and ch4 3.ch3 and c2h6 4. ch and c2h4

- 3. and

Explanations:- An empirical formula is the simplest whole number ratio of the moles of atoms present in the compound.

If we simplify the first par formula then they becomes and CH. This pair does not share the same empirical formula.

Second pair formulas are already simple and could not be further simplify. Since they are different, it is also not the right option.

Fourth pair has CH and . could be simplify to . The two formulas are still different and so it is not the right choice.

The only correct one is third pair as one of them is and other one is could be simplify to . This pair share the same empirical formula, .

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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