What is the heat of reaction for the decomposition of hydrogen peroxide below given the heat of formation of hydrogen peroxide is
-185 kJ/mole and the heat of formation of water is -285 kJ/mole?
H202(1) --> H2O + 12 Oz(g)

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?