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100 mL of .200 M HCl is titrated with .250 M of NaOH. What is the pH after 50 mL of the base has been added? What is the pH at the equivalence point?
Not wanting to waste the expensive sample, you decided to measure the pH of the solution and determined it to be 1.85. What was the concentration of the orginal acid sample? (Hint: it is a monoprotic acid)
calcium and the human body normally contains 6 quarts of blood, what mass of calcium (in grams) will be found in the total blood volume?
If the mobile phase flow rate is 0.4 m/min, what is the analyte linear migration rate, and how long is the column?
A certain weak base has a Kb of 7.80 × 10-7. What concentration of this base will produce a pH of 10.16
One method of estimating the temperature of the center of the sun is based on the assumption that the center consists of gases that have an average molar mass of 2.00 g/mol.
Draw the structure ( Fisher projection) of an optically inactive compound z, C4H6O6
One enzyme under study in a is peptidylglycine alpha-amidating monooxygenase (PAM). The molecular weight of monomeric PAM is 75,000 g/mol and the enzyme contains 2 copper atoms/enzyme molecule.
A mixture of CO, CO2 and O2 is contained within a 275 mL flask at 0C. If the total pres- sure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr, what is the partial pressure of O2?
A zero-order reaction has a constant rate of 2.40×10?4 M/s. If after 45.0 seconds the concentration has dropped to 2.00×10?2 M , what was the initial concentration
As gas expands from 1.00 L to 2.50 L against constant pressure of 820 torr. Calculate the change in internal energy for the gas, if 120 J of heat is transferred to the gas during the expansion.
What is the structure of the product formed in the following reaction of an epoxide with ethoxide ion? If more than one stereochemical product is possible
What is the molality of ethanol in a solution made by dissolving 14.6 g of ethanol, C2H5OH, in 53.6 g of water?
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