3.61 g of ammonium chloride NH4Cl (MW:53.491 g/mol) are added to a calorimeter cup containing 25.30 g of water at 22.0oC. The temperature of the calorimeter decreases to 17.3oC. How many moles of ammonium chloride are in the solution? (You could further use this set up to determine ∆H by dividing q by your number of moles!)
A) 0.20 mol
B) 0.30 mol
C) 0.40 mol
D) 0.50 mol