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What is the pH of the buffer that results when 12.5 g of NaH2PO4 and 22.0 g Na2HPO4 are mixed and diluted with water to 0.500 L? (The acid dissociation constants for phosphoric acid are:
Ka1 = 7.5 * 10^-3
Ka2 = 6.2 *10^-8
Ka3 = 3.6 *10^-13
The heat of vaporization of water is 9.72 Kcal/mol.How much heat (in kilocalories) is required to vaporize 2.70 mol of H2O and how much heat (in kilocalories) is released when 440 grams of steam condenses
Any help on this problem would be appreciated! Not quite sure how to to use the solubility values in this problem. How can we determine the how many grams will crystallize
an unknown liquid with boiling range of 179-181 C is insoluble in water, gives a blue green suspension with chromic acid and immediately forms a separate layer when shaken with Lucas' reagent.
How many minutes would be required to electroplate 25g of chromium by passing a constant current of 4.80 amperes through a solution containing CrCl3
a stock solution is prepared by adding 28 ml of 0.2 m na3po4 to enough water to make 76 ml. what is the po43-
The unit cell in a crystal of diamond belongs to a crystal system different from any we have discussed. The volume of a unit cell of diamond is 0.0454 nm^3 and the density of diamond is 3.52 g/cm^3. Find the number of carbon atoms in a unit cell of..
calculate the number of grams of xenon in 3.940 g of the compound xenon tetrafluoride. In grams please.
a.the density of liquid oxygen at its boiling point is 1.14 and its heat of vaporization is 213.nbsphow much energy in
How many liters of chlorine gas, measured at STP, would be produced by the electrolysis of molten sodium chloride using a current
When a 0.6333-g sample of a compound of carbon, hydrogen and sulfur was burned in excess oxygen, 0.9272 g CO2, 0.3795 g H2O and 0.6749 g SO2 were obtained. In a separate experiment, it was found that, for fixed temperature and pressure
Calculate how much energy in the form of heat is available from 100mL of this mixture and compare it with the amount from pure gasoline. assume the densities of ethanol and gasoline are
If 352 g of magnesium reacts with excess oxygen to produce 296 g of magnesium oxide, what is the percent yield for the reaction?
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