The process by which salt and water reacted in a limited way to form an acid or a base is?

The hydrolysis of proteins by diluting mineral acids produces 

Which of the following oxide causes acid rain?

The ratio of carbon atoms of hydrogen atoms in a hydrocarbon is 1:2. If its molecular mass is 56, what is its molecular formula?

What is the relative molecular mass of the compound below?

[H = 1.0; C = 12.0; O = 16.0]