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If a pipette was incorrectly calibrated so that it transfers 5% too much solution, would the density you calculated for the liquid tend to be larger or smaller then the correct value? explain.
Determine what mass of hydrogen is required to form 624g of methanol by the reaction CO+2H2->CH3OH.
The next most abundent isotope is 26Mg, relative atomic mass 25.98259. The third Isotope is 25Mg whose natural abundance is in the ratio of 0.9083 to that of 26Mg. What is the relative atomic mass of 25Mg?
tap water with a Cl- ion concentration of 1*10^-5 mol/L? Ksp=1.77*10^-10
Determine the ionic strength. Assume that all the salts completely dissolve and dissociates into their respective ions
At a given temperature, 2.74 atm of F2 and 2.08 atm of Br2 are mixed and allowed to come to equilibrium. The equilibrium pressure of BrF is found to be 1.003 atm. Calculate Kp for the reaction at this temperature. F2(g) + Br2(g) 2 BrF(g)
Find the change in entropy (S) for the system, surroundings and universe for the conversion of 1 mol of ice at 0 degrees C and 1.00 atm to 1.0 mol of steam (vapor) at 100 degrees C and 0.50 bar
Calculate the pH of a solution formed by mixing 65 mL of 0.31 M NaHCO3 with 75 mL of 0.10 M Na2CO3.
A current of 11.3 A is applied to 1.25L of a solution of .552M HBr converting some of the H+ to H2(g).
Complete combustion of 3.90 g of a hydrocarbon produced 12.0 g of CO2 and 5.54 g of H2O. What is the empirical formula for the hydrocarbon?
Calculate the molarity of an aqueous solution that is 5.20% by mass CaCl2, given that the density of the solution is 1.19 g/mL
oxymercuration of an alkene to a ß-hydroxyl-alkyl mercury specie B. addition to bromine to an alkene C. hydroboration of an alkene D. E2 dehydrohalogenation E. opening an epoxide with a nucleophile
A baseball weighs 5.17oz . What is the kinetic energy in joules of this baseball when it is thrown by a major-league pitcher at 91.0mph. By what factor will the kinetic energy change if the speed of the baseball is decreased to 55 {\rm mph}
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