¿De los siguientes compuestos cual contiene enlaces covalentes?

LiF

CH4

Al2O3

N2

If 1.8 l of water is added to 2.5l of a 7.0 molarity koh solution, what is the molarity of the new solution

Chemistry worksheet - i am not sure what they are asking for exactly?

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.