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2.00 g of salicylic acid (molar mass = 138.1 g/mol) reacts with an excess amount of acetic anhydride. A) calculate the theoretical yield of acetylsalicylic acid (molar mass = 180.2 g/mol) for this synthesis.
A solution is made by dissolving 25g of NaCl in enough water to make 1.00 L of solution. Assume that the density of the solution is 1.00 g/cm3. Calculate the mass percent, molarity, molality, and mole fraction of NaCl
Change in heat content We write H = Hfinal - Hinitial or for chemical reactions H = Hproducts - Hreactants Given this equation, What sign is H for exothermic reactions? What sign is H for endothermic reactions?
What techniques might you employ to induce crystallization if no crystals have formed after you cool the solution to room temperature.
determine how many grams of C 12 H 22 O 11 (sucrose) (mm = 342 g/mol) does he need if he uses 375 grams of Water? it is given that the vapor pressure of water =17.5 mm Hg. at 20 degree celsius temperature)
How many grams of potassium chloride will be generated on decomposition of 225 grams of potassium chlorate?
explain why the vitamin tablet is crushed before titrating with the iodate titrant.
In the reaction 2-phenylacetic acid + ethanol in a H2SO4 solution yields Ethyl-2-phenylacetate, (a) which group in the acyl compound is being substituted and (b) what is the substituting group?
Consider the following data showing the initial rate of a reaction at several different concentrations of A
A bowl of 510 g of water is placed in a microwave oven that puts out 611 watts (J/s). How long would it take in seconds to increase the temperature of the water from 12.0oC to 49.5oC
Identify the group of elements that corresponds to each of the following generalized electron configurations and indicate the number of unpaired electrons for each:
5x10^3 moles of an ideal gas are held in a container of volume 0.0124 dm^3 and surrounded by a thermostat at 298K. The gas is allowed to double in volume against a constant external pressure of 1.0 atm
a 10.00g sample of toothpaste contaning stannous fluoride gives0.145g precipitate of stannous phosphate.what is the percentage of snf2 in the toothpast sample.
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