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You have have a buffer solution composed of 4.00 mol of acid and 1.75 mol of the conjugate base. If the pKa of the acid is 2.20, what is the pH of the buffer?
A 496-mL sample of a gas at 263 oC is cooled at constant pressure until its volume becomes 241 mL. What is the new temperature in oC?
Chlorine has an average atomic mass of 35.453 amu. The main isotopes of chlorine are 35Cl which has an atomic mass of 34.968 amu and 37Cl, which has an atomic mass of 36.956amu. Given this, what is the percent abundance of each isotope in natural ..
the hydrated radius of hemoglobin is found to be 3.55 nm. How many water molecules hydrate a hemoglobin molecule?
Use the bond dissociation energies in Table 7.1 on page 219 (of your text) to calculate an approximate ?H° in kilojoules for the reaction of ethylene
nitric acid and potassium carbonate. b. sodium bromide and lead nitrate. c. acetic acid and calcium hydroxide.
C2H5OH solution has a density of 1.01 g/mL. Calculate the molarity of the C2H5OH solution
H2S and H2O have simipar structures and their central atoms belong to the same group. Yet H2S is a gas at room temperature and H2O is a liquid. Use bonding principles to explain why.
the atmosphere and since CO2 dissolved in water causes it to be slightly acidic, will the use of deionized water that has not been previously boiled cause the mass
Calculate the volume of chlorine gas in liters, measured at 20 C and 762 mm Hg, required to react with this volume of seawater.
A compressed air tank carried by scuba divers has a volume of 9.5 L and a pressure of 130 atm at 20 C. What is the volume of air in the tank (in liters) at STP?
Solutions of sodium thiosulfate are used to dissolve unexposed AgBr ( Ksp= 5.0E-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.00L of 0.500M Na2S2O3?
Suppose that the reaction X+Y==> Z has a rate law=k[X][Y] a.What is the overall order of the reaction? b.What is the order with respect to X?To Y?
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