You are trying to find the heat (qrxn) in joules.
C is 4.19
Change in temp is -2.2
I don't know how to find the mass if they tell me that the density of the solution is 1.02 and that the volume of water is 100 mL
(Should I use the mass of the solution I calculated which was 5.5 because why would they give me density in the question I don't need it