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A sample of methane gas at a pressure of 0.801 atm and a temperature of 26.9oC, occupies a volume of 687 mL. If the gas is allowed to expand at constant temperature until its pressure is 0.438 atm, the volume of the gas sample will be
What is the fundamental difference between a voltaic cell and an electrolytic cell. Can a voltaic cell in which both half-reactions are the same generate a current.
Tell what type of chemical reaction is represented by the following chemical equation.
How much 1.0 M NaOH must be added to a 100 ml of 10 mM H3PO4 to raise the pH of the solution to 7.0? B) If 2 volumes of 2.0 M Na2HPO4 are added to 1 volume of 0.1 M H3PO4, what is the pH of the resulting phosphate buffer?
A certain quantity of a gas occupies 61.3 mL at 68 ?C. If the pressure remains constant, what would be the volume of the gas at 128 ?C?
For a 0.13 M solution of formic acid, HCOOH, the pH = 2.40. Calculate Ka for formic acid.
Which of the following correctly lists the following isomeric alkanes in order of increasing boiling point? n-hexane, 2,3-dimethylbutane, 2-methylpentane
Draw a titration curve for both of these peptides. Be sure to label the axes properly, indicate the pKa values, the equivalence points and the buffering regions
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.
Na2CO3(s) (sodium carbonate) can be prepared by heating NaHCO3(s) (sodium bicarbonate). If a sample of NaHCO3 is placed in an evacuated flask and allowed to achieve equilibrium with the products which are formed at 100ºC, what will the total gas p..
A gaseous mixture of O_2 and N_2 contains 40.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 325 mmHg?
Calculate how many whole drops (.05 mL/drop) of 6 M HCl are required to dissolve this. (I found this to be 11.59 drops
Find the nuclear binding energy of uranium-234 (atomic mass = 234.040947 amu) in utits of joules per nucleon. (Data: neutron mass = 1.674928 x 10^-24 ; proton mass = 1.672623 x 10^-24; Avogadro's Number = 6.0221367 x 10^23; c = 2.99792458 x 10^8)
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