The heat of vaporization of liquid isopropyl alcohol is 159 cal/g. Calculate the energy required to vaporize 39.5 g of this compound.

In the reaction AgNO3(aq) + HBr(aq) → AgBr(s) + HNO3(aq), when 50.0 mL of 4.00×10⁻² M AgNO3 is combined with 50.0 mL of 4.00×10⁻² M HBr, what is the precipitate formed?

When 50.0 mL of 0.100 M AgNO3 is combined with 50.0 mL of 0.100 M HCl in a container, how many moles of AgCl are produced?

The heat of vaporization of water at 100°C is 40.66 kJ/mol. Calculate the quantity of heat that is absorbed or released when 20.00 g of steam condenses to liquid water at 100°C.

The temperature rises from 25.00°C to 29.00°C when 3.50 g of sucrose (C12H22O11, molar mass 342.3 g/mol) undergoes combustion in a bomb calorimeter. Calculate ΔE for the combustion of sucrose in kJ/mol sucrose, given that the heat capacity of the calorimeter is 4.50 kJ/°C.