6.54 calculate the heats of combustion for the following
aris reactions from the standard enthalpies of formation
listed in appendix 3:
(a) c2h4(g) + 302(g) → 2c02(g) + 2h2o(1)
(b) 2h, s(g) + 302(g) → 2h2o(l) + 2502(g)

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Amixture with the same composition throughout is!

Which sentence from holes contains an implied personality trait? stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. he'd just been in the wrong place at the wrong time. stanley felt somewhat dazed as the guard unlocked his handcuffs and led him off the bus. stanley nodded to show he understood