Urgent what is the mass of 2.846*10^24 atoms of neon?

20.10 amu    

Neon consists of 3 isotopes with masses 19.92, 20.99, and 21.99 amu. The relative abundance of these 3 isotopes is 90.92, 0.25, and 8.83 percent, respectively.The average atomic mass of neon is the weighted average of the mass of the isotopes and equal to 19.92*0.9092 + 20.99*0.0025 + 21.99*0.0883 = 20.10

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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.