As the pH increases, the hydroxide ion concentration
A) goes down.
B) gets larger.
C) starts to affect the H+ concentration.
D) starts to decrease because it is reacting with the excess hydronium ions.
E) stays constant.
Answer: B
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In 1998 came the discovery of ________, which seems to overwhelm even gravity and all the dark matter in the final fate of the cosmos
Fill in the blank(s) with correct word
Isotope A has a decay constant of 0.861 s-1 and isotope B has a decay constant of 0.627 s-1. Which isotope has a longer mean life (time constant)?
A) isotope A B) isotope B
In 1974, a radio message was sent out from the Arecibo observatory in Puerto Rico. How far has it gotten, approximately?
A) just beyond our Solar System B) not even to the nearest stars C) just a miniscule fraction of the distance across the Milky Way D) almost to the center of the Milky Way E) beyond the Milky Way, to the Andromeda galaxy
A black hole consists of a large ________ in a small space.
Fill in the blank(s) with the appropriate word(s).