Question

The following reaction is an example of a base reacting with water: NH3 + H2O → H3O + NH4+
A. true
B. false

Answer 1

The first step to solving these types of problems is to balance the equation.

Answer 2

Then I think you should take a close look at the H molecules and see if water gives up an H or takes a H. Looking at chemical equations like that helped me develop a deeper understanding of what a "reaction" is.