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You folded your filter paper and weighed it on the analytical balance. You then tore off the corner, inserted filter paper in the funnel, and filtered your BaSO4 precipitate. How does this affect the percent sulfate you calculated; too low, too high, no effect?
What is the freezing point of a solution made by dissolving 352g of ethylene glycol C2H6O2 on 648 g of water the freezing point of pure water is 0.0C and kf of pure water is -1.86Cm?
the original conditions on a container filled with gas at a constant temperature are 180 cc and 300 mm hg. the desired
What is the hybirdization of a centeral atom that has four sigma bonds and has no pairs of electrons?
a sample of iron absorbs 67.5 j of heat upon which the temperature increases from 21.5 c to 28.5 c. if the specific
osmotic pressure is often used to determine the molar mass of largemolecules however errors can be introduced into the
what is the simplest formula for chalcocite if a sample of this ore contains 8.274 g copper and 2.088 g
If a non-insulated metal piston is filled with perfect gas at 1 atm of presssure and room temp and the gas is compressed with 10atm, the gas initially heats up and then cools down.
The equilibrium constant for the reaction N2(g) + 3H2(g) = 2NH3(g) is Kp=4.34x10^-3 at 300*C. Pure NH3 is placed in a 1.00 L flask and allowed to reach equilibrium at this tempurature. There are 1.09 g NH3 in the equilibrium mixture.
Ethylene glycol, HOCH2CH2OH, is effective as an antifreeze, but it also raises the boiling temperature of automobile coolant, which helps prevent loss of coolant when the weather is hot.
Calculate the equilibrium constant for the following reaction: (Ka of HCOOH = 1.7 x 10^-4) HCOOH (aq) + OH-(aq) HCOO-(aq) + H2O(l)
Compound B is quite soluble in toluene, but only slightly soluble in petroleum either. How could these two solvents be used in combination in order to recrystallize compound b
Identify the two important classes of catalysts. Choose a catalyst that exists in the human body. Explain its importance and how it works.
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