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4 grams of an epoxy with a "weight per epoxy" of 675 in a 70% solid solution is needed for a reaction. How much of an epoxy that has a "weight per epoxy" of 435 in 80% solid solution is needed for the same reaction?
What is the theoretical yield of aspirin in the reaction of 3.60 grams of salicylic acid with excess acetic anhydride?
You are given 2.56 g of salicylic acid. Using the procedure in the lab manual for the synthesis of aspirin, you recover 0.89 of aspirin. Calculate your percent yield of aspirin
a solution is prepared by adding 1.60 grams of solid NaCl to 50ml of 0.100M CaCl2. what is the molarity of chlorine ion in the final solution? assume that the volume of the final solution is 50ml
A distance of 200 ft must be taped in a manner to ensure a standard deviation smaller than ± 0.03 ft. What must be the standard deviation per 100 ft tape length to achieve the desired precision?
In a butane lighter, 9.8 of butane combines with 35.1 of oxygen to form 29.6 carbon dioxide and how many grams of water.
Amstop Company issues $20,000,000 of 10-year, 9% bonds on March 1, 2007 at 97 plus accrued interest. The bonds are dated January 1, 2007, and pay interest on June 30 and December 31. What is the total cash received on the issue date?
What is the high-T approximation for rotations and vibrations? For which of these two degrees of freedom do you expect this approximation to be genrally valid at room temperature?
Calculate the mass of nitrogen dissolved at room temperature in an 92.0L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78.
Why is sodium bicarbonate used with acids and used in cooking
For the reaction 2HCl + Na2CO3 to 2NaCl + H2O + CO2 what volume of 0.45 M HCl solution would be needed to produce 2.5 L of CO2 at STP?
what is the equilibrium expression for the reversible reaction of: 2CrO42-(aq) + H2O(l) Cr2O72-(aq) + 2OH-(aq)
Consider a galvanic cell that uses the following reaction. 2 Ag+(aq) + Sn(s) 2 Ag(s) + Sn2+(aq) Calculate the potential at 25°C for a cell that has the following ion concentrations
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