How to solve this...

An experiment is performed using a calorimeter, the reaction is shown below...

MgO + 2 HCl -> MgCl2 + H2O

1.00 g MgO is added to 100 mL of 1.00 M HCl. The initial temperature of the HCl solution was 22 degrees Celsius. The maximum temperature reached was found to be 28 degrees Celsius.

a. Determine the heat released in the experiment (q). Assume the density of HCl is 1g/mL and the specific heat is 4.184 J.

b. Use the mass of magnesium oxide, and the volume and concentration of HCl to determine which substance is the limiting reactant?

c. Use the moles of the limiting reactant to determine the H (KJ/mol) for the reaction, including the proper sign (+ or -)