Which is a longitudinal wave that requires a medium to move?

a.)sound wave
b.)ocean wave
c.)lightwave
d.)radio wave
e.)microwave

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

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j