28.5g of iron shot is added to a graduated cylinder containing 45.50 ml of water. the water level rises to 49.10ml mark, from this info, calculate the density of iron.

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.

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!

Is it safe to take 450mg of diphenhydramine hydrochloride?