What is the formula for calculating the pH of a solution

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d.the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

The number at the end of an isotope’s name is the number.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?