Are temperature and heat physical or chemical properties?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.

What element has similar physical and chemical properties as boron.