How many molecules are there in 122 grams of NO2

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

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.

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring