what about the chemistry was the hardest? 1)There is no way they went into single/double replacement, decomposition, and combination reactions. 2) What about Stoichiometry problems? e.g if 2.50kg of pentane are burned, how many moles of co2 can be formed?
C5H12 +8 02 ---> 5C02 + 6H20 <------ this would take a long time with no calculator
3) What about "what is the limiting reagent" type questions?
4). Gas conversions?
e.g A gas occupies 228mL at 25C' and 3.00 atm. At what Celsius tempature will it occupy 125 mL if the pressure remains at 3.00 atm?
5) or were most of the questions like ---> naming covalent/ionic compunds, naming elements, fiquring how many valence electrons, isotopes, Lewis structure,balancing equations, cation and anion, ph acid/base/buffer,protons,neutrons,electrons,atomic weight, atomic mass, polar/non polar, Periodic trends ( metals, earth metals, transition metals, non metals, noble gases. etc etc