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A 32.0-g sample of water at 260. K is mixed with 47.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
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A balloon filled with {\rm H_2}(g) at STP has a volume of 2.24 {\rm L}.What is the final gas volume if 0.10 {\rm mol} {\rm He}(g) is added to the balloon and the temperature is then raised to 52.0^\circ {\rm C} while the pressure and amount of gas are held constant?
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A 75.0 mL volume of 0.200 M NH3 (Kb=1.8* 10^-5) is titrated with 0.500 M HNO3. Calculate the pH after the addition of 28.0 mL of HNO3.
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How many mL of 0.242 M NaOH are required to titrate with 18.0 grams of H2C2O4
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3. At a certain temperature, 14.0 moles of SO3 are placed into a rigid 4.0 L container. The SO3 dissociates as follows: 2 SO3 (g) 2 SO2 (g) + O2 (g) At equilibrium 10.6 moles of SO3 are present. Calculate Keq at this temperature.
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What minimum mass of water (in {\rm g}) has to evaporate to absorb 173 {\rm kJ} of heat?
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A 0.216 sample of carbon dioxide, , has a volume of 525 and a pressure of 435 . What is the temperature of the gas
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The relationship between the solubility s in water and Ksp for the ionic solid M2A3 is 1. Ksp = 108 s5. 2. Ksp = s5. 3. Ksp = 5 s. 4. Ksp = 6 s2.
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A ligand is best described as which of the following? 1. an Arrhenius acid 2. a Lowry-Bronsted acid 3. an Arrhenius base 4. a Lewis base 5. a Lewis acid 6. a Lowry-Bronsted base
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The pH of a solution of hypochlorous acid, HClO, was measured to be 3.89. Calculate the molarity of this solution. The Ka for HClO is 3.0 10 8. Answer in units of M.
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Sample Questions
- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
- 2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)
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