What is the oxidation number of chromium in k2cr2o7? 1.  +12 2.  +2 3.  +3 4.  +6?

Iwll give extra points to who gets this for ! what type of reaction is this? ?

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5