What is the balanced thermochemical equation describing the combustion of octane (Enthalpy H= -5500 kJ/Mol). (Need to balance the equation with a 1 in front of the octane. Thank you!!

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?