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Nalorphine (C19H21NO3), a relative morphine, is used to combat withdrawl symptoms in narcotics users.
How many grams of a 0.0036 molality aqueous solution of nalorphine are needed to obtain a dose of 2.51mg?
volumetric flask and this solution becomes quite warm, but after it is permitted to return to room temperature, H 2 O is combined to total 500 mili litres of solution. Compute the pH of the final solution. ?
RNAse is an enzyme that cleaves the P-O5\' bond in RNA. It has two His residues in the active site. Suggest a plausible explanation
How well do your thermometer readings agree with the accepted values for the freezing point and boiling point of water? Express any discrepancy as a deviation in degrees.
Using the fact that on the surface of the Earth, where g is constant, 1 kg has a weight of 2.2 lbs, find your mass in kg. C) Convert your height in feet and inches into meters (1 ft = 30.48 cm; 1 in = 2.54 cm).
Calculate the molar concentration of illinic acid and of its conjugate base illinate ion (in moles/L; M) in a 3 M illinate buffer at pH 7.5. The pKa of illinic acid is 6.7.
Determine pH of a solution when 25.00 ml of 0.100 M HOAc is titrated with 0.100 M KOH. What is the pH at the equivalent point. (ka for HOAc = 1.80 x 10-5) HOAc + KOH ---- KOAc + H2O
Approximately how much water will you need to use to prepare the hot saturated? Upon cooling in an ice-bath and subsequent filtration, how much pure phthalic acid would you expect to recover? show calculations
A helium-filled weather balloon has a volume of 714 L at 23 oC and 750 mmHg. It is released and rises to an altitude of 3.78 km, where the pressure is 546 mm Hg and the temperature is -2oC. The volume of the balloon at this altitude is
A student prepares a buffer by dissolving solid sodium acetate, NaCH3COO, in a solution of acetic acid, CH3COOH. Write the net ionic equation for the buffer system.
When a sample of helium gas is charged with electricity, what causes the bright-line spectrum that is observed
The value of nD20 for a mixture can be approximatedas the weighted average of the refractive indices ofthe individual components. For a heptane/alpha-pinene mixture nD20 (mixture)=VheptanenD20 (heptane) + VpinenenD20 (pinene)
How many grams of dry NH_4Cl need to be added to 2.10 L of a 0.100 it M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.84? K_b for ammonia is 1.8 * 10^{-5}
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