John adds 5gms of sodium chloride to 0.250 liters of water in a half‐liter glass jar and stirs it till the salt completely dissolves. Then, he transfers the entire solution into another one‐liter glass jar and adds another 5 gms of sodium chloride and waits till it dissolves. What is the concentration of the salt solution that he has prepared in grams per mL?

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.