Which pair of compounds has the same empirical formula? c3h8 and c3h c2h2 and c2h c4h10 and c6h c4h10 and c2h5

The answer is C4H10 and C2H5

The empirical formula of both compounds are the same, so, where is the difference? It's on the number of molecules. It means that we can find a number which can multiply or divide one of both empirical formulas in order to get the other one.

We can rewrite the first compound formula in the following way:

For this particular case, the empirical formula( which is the simplest formula of the compounds we have) is C2H5.

Have a nice day!

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definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.