Select the statements that are TRUE.

Electrophilic aromatic substitution reactions have energies of activation that are very low.
Benzene and its derivatives tend to undergo electrophilic aromatic addition reactions.
Dienes and alkenes are much more stable than benzene rings.
Addition reactions with benzenes lead to the loss of aromaticity.
Benzene and its derivatives tend to undergo electrophilic aromatic substitution reactions.
Benzene and its derivatives undergo a type of substitution reaction in which a hydrogen atom is replaced by a substituent, but the stable aromatic benzene ring is regenerated at the end of the mechanism.

What do you mean by that? like the contents? the thc level?

Acovalent bond is formed between the two hydrogen bonds

Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f.