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Phosphate systems form essential buffers in organisms. Calculate the pH of a buffer made by dissolving 0.80mol of NaOH in 0.50L of 1.0M H3PO4.
a steel tank with a volume of 9.583L contains N2 gas under a pressure of 4.972 atm at 31.8C Calculate the number of moles of N2 in the tank.
(One amp-hour is the charge that passes through a circuit when 1 Amp flows for 1 Hour). What mass of Zn is consumed when 35 amp-hours are drawn from the cell?
If the container is compressed to 2.40 L and the temperature is increased to 36 degree celsius, what is the new pressure,P2 , inside the container? Assume no change in the amount of gas inside the cylinder.
In a titration of 38.16 mL of 0.1234 M hydrazoic acid (HN3, Ka = 1.900x10-5) with 0.08559 M KOH, what is the pH after 87.78 mLs of titrant have been added
The specific heat capacity of the solution produced was 4.20 J/g•°C, and final temperature reached was 34.91°C. How much heat was produced by the dissolution
Express b in terms of the mass m of each atom and the temperature T of the gas( and other constants), given that the Boltsmann factor in P(cx) pertains to the x- component of the kinetic energy of each atom in the gas.
the molar mass of the compund is 92g/mol. what is the empirical formula and molecular formula of he compund?
A chemist is commissioned to produce 50,000 liters of .550M aqueous phosphoric acid. The chemist can purchase solid, 98.64% pure, phosphoric acid to dissolve in water. How many grams of this reagent are required
for 1st order problem, at 298k the rate is 3.8X10^-6M/s, and at 350k the rate is 4.2X10^-5 M/s. What is the half life at 360k?
what mass of barium is produced when molten BaCl2 is electrolyzed by a current of 3.30 105 A for 7.00 hours?
Calculate the pH of the solution after 10.0, 20.0, and 30.0 mL of acid have been added; pKb of (CH3)3N=4.19 at 25 degrees C
Which plot would not have a slope from which the indicated quantity for the reaction A ? Product(s) could be determined
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