How many moles of methane(ch4) are in 7.31*10^25 molecules

There are 121.37 moles of methane(CH₄) in 7.31*10²⁵ molecules

Explanation:

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023 * 10²³ particles per mole. The Avogadro number applies to any substance.

Then a rule of three can be applied as follows: if 6,023*10²³ molecules are in 1 mole of CH₄, 7.31*10²⁵ molecules will be present in how many moles of the substance?

moles=121.37

There are 121.37 moles of methane(CH₄) in 7.31*10²⁵ molecules

the answer to your question is c

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.