Explain why a reaction is exothermic in terms of bond making and bond breaking?

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions