Consider the transformations a water sample undergoes without external pressure variation (a) Transformations 2 and 4 are endothermic.
(b) Transformations 1 and 2 are exothermic.
(c) The amount of energy absorbed in 3 is equal to the amount released in 1.
(d) The amount of energy released in 2 is equal to the amount released in 4.
(e) The change of physical state does not involve heat energy.

In a chemical reaction at equilibrium, the rate of the forward reaction the rate of the reverse reaction. if the rate of the forward reaction more products are formed.

What is the independent variable in this investigation? mass volume sample number substance density

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.