How many phases of matter are there? two, three, four or five?

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

Why are pipes bursting in the in extremely cold weather?

If two atoms are bonded to a central atom with no lone pairs, how will they be arranged