Hydrogen peroxide and an oxalate ester, chemicals used in glow sticks, are mixed in a calorimeter with 6.4 g of water at 28.7 °C. You determine the heat change was -298.91 joules. What was the final temperature of the water? (c of water = 4.184 J/(g °C) Give your answer in °C to the nearest tenths. Do not put units in the answer space.