Why do models help to generate a hypothesis?

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

Draw the lewis dot structure for each of the following polyatomic ions

Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium. b)heavier than helium. c)the same weight as helium. d)dependent on the element that reacted with carbon.