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How many grams of naphthalene (C10H8) must be added to 25.00 g of CCl4 so that the vapor pressure of CCl4 over the solution is 483 mm Hg? Assume the vapor pressure of naphthalene at 65 degrees Celsius is negligible.
The most common source of copper (rm Cu) is the mineral chalcopyrite (rm CuFeS_2). How many kilograms of chalcopyrite must be mined to obtain 230. g of pure rm Cu?
construct an energy level diagram (molecular orbital) for the molecule SO. We are then asked to comment on the ionic species of SO - bond order, bond distance etc. So far so good.
how many grams of iron (2) chloride would you need in order to make 2.0 L of a .050 M iron (2) Chloride solution?
In the NMR Spectra there is : 2 quartet( one has 2 hydrogens and the other has 3 hydrogens they are both located in the range 7.5-6.5) and there are two triplets at 4.5-3.5 and they both have two hydrogens, and there is a singlet located at 2.0 th..
Tf will be negative and so you must use negative Kf values. Either way, the freezing point of the solution should be lower than that of the pure solvent. Assuming 100% dissociation, Find the freezing and boiling points of 1.85 m Na2SO4(aq).
After the addition of the ammonium ion to a dilute solution of ammonia containing phenolphtalein it became much paler. Please explain why with LeChatelier principles.
A flask contains 0.250 of liquid bromine, . Determine the number of bromine molecules present in the flask.
When diluting the juice samples with water, you did not need to be as accurate as in previous measurements. Why was the same level of precision not required?
Calculate the number of moles and the mass of sodium carbonate present in the mixture. (Formula weight of sodium carbonate is 106g/mol)
CS2(l) + 3O2(g) -> CO2(g) + 2SO2(g) What volume of O2 is required to react with excess CS2 to produce 4.0 L of CO2? Assume all gases are measured at 0oC and 1 atm.
why is the ortho-form of the diamine, and why is the ortho- form of the diamine a hindering impurity that must be rigorously removed before the production of Kevlar and Nomex?
The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (C3H8) to burn it completely.
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