How can impacted ear wax be removed?

Carefully by an ENT. If it's impacted 9 times out of 10 it was pushed in by a well intentioned q-tip. Removing impacted wax is bread and butter for an ENT doctor. We have the proper skill and equipment. Anything that you try has the risk of further aggravating your ear leading to worsening impaction and risking infection and pain. Do nothing and contact an ENT doctor for help.
Definitely. It can be lavaged (washed out) or in more severe cases, manually taken out.