Achemical reaction that releases heat to the surroundings is said to be and has a h at constant pressure. a) endothermic, positive b) endothermic, negativec) exothermic, negatived) exothermic, positivee) exothermic, neutral

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.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?