Q1: Which of the following of Dalton's theories do we still use today? matter is composed of small tiny particles called atoms
atoms cannot be divided
atoms of the same element are identical in size, mass, and properties

Q2:How many neutrons are there for ^242U?

92 neutrons
238 neutrons
242 neutrons
150 neutrons

the answer is true. hope it .

the answer is 0.8m.

by: nicholas

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.