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David J hooper weighs out 13.1 grams of salicylic acid in a 250 mL flask and adds 7.5 mL of acetic anhyride (density=1.080 g/mL) Determine the max (theoretical number of grams) of acetlysalicylic acid he can prepare
the mass of component A is 2.47 g, component B is 1.12 g, and component C is 0.654 g; what is the percent composition of component A?
Important information about Organic molecules, What is meant by a molecules "handedness"? Can all organic molecules exhibit this property? What makes such a property possible?
25.0 mL of a calcium chloride solution is added to an excess of aqueous silver nitrate. The resulting precipitate has a mass of 1.25 grams. If the percent yield of this reaction is known to be 85%, calculate the concentration in molarity of the or..
The mass percent of a three component gas sample is 58.0% C2H4O2, 14.6% NH3 and 27.4% CH2O. Calculate the partial pressure (atm) of CH2O if the total pressure of the sample is 0.340 atm.
What were the principal quantum numbers of the initial and intermediate excited states involved?
The zinc content of a 1.23 g ore sample was determined by dissolving the ore in HCl, which reacts with the zinc, and then neutralizing excess HCl with NaOH. Zn+2HCl-->ZnCl2+H2
In dilute solution the carbonyl absorption band of II occurs at 1702/cm. Explain this observation. stretching vibration in carboxylic acids is heavily mixed
What is the equilibrium constant Kc of this reaction? Use an ICE table with numbers.
Write the net ionic equations that account for the pH values of: 0.1M NH4Cl (pH 6.25), 0.1M NaC2H3O2 (pH 8.24)
Calculate the ratio of dihydrogen phosphate to hydrogen phosphate in the blood at pH 7.4. The Ka = 6.3 x 10 -8 5. For a weak acid with a pKa of 6.0 calculate the ratio of conjugate base to acid at a pH of 5.0.
How many moles of steam are produced at 2.00 atm and 202.0 by the complete combustion of 12.50 L of methane gas?
suppose 2.3754g of copper(II) sulfate pentahydrate is heated to drive off the water of crystallization. Calculate what weight of anhydrous salt will remain?
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