If it takes 0.0022 moles of HBr to neutralize an unknown amount of Fe(OH)3, how many moles of Fe(OH)3 were present? (It takes 3 moles of HBr to neutralize 1 moles of Fe(OH)3. ) Show work, please!

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

Can someone me out on this question for my national 5 chemistry homework