What is the difference between an author's 'tone' and/or 'mood' in a novel? ?

the tone is the authors attitude toward a subject, the mood is depending on who you ask) the way the audience is made to feel about something, or the atmosphere of the story.

The tone is the mood the author uses in his language specifically, and a mood in a novel is the general emotional vibe of the story, overall.

because each is self-sufficient.  

the president was the speaker and it was a great part of history.

explanation:

video of the national aeronautic space administration's (nasa) coverage of president john f. kennedy’s address at rice university, houston, texas, concerning the nation's efforts in space exploration. in his speech the president discusses the necessity for the united states to become an international leader in space exploration and famously states, "we choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard."