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Question number 1
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A hose delivers water to a swimming pool that measures 9 m long by 3.5 m wide by 1.75 m deep. It requires 97 hours to fill the pool. At what rate in liters per minute will the hose fill the pool?
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Calculate the pH corresponding to the hydroxide ion concentration given below: [OH-] = 4.92 x 10-6 (That's 10 to the negative 6.) I feel quite sure I'm doing it correctly, but WebAssign says I'm wrong.
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Many metal ions are precipitated from solution by the sulfide ion. As an example, consider treating a solution of copper(II) sulfate with sodium sulfide solution. CuSO4(aq) + Na2S(aq) CuS(s) + Na2SO4(aq) What volume of 0.135 M Na2S solution would be required to precipitate all of the...
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A sample of sodium hydrogen carbonate solid weighing 0.1012 g requires 47.25 mL of a hydrochloric acid to react completely. HCl(aq) + NaHCO3(s) NaCl(aq) + H2O(l) + CO2(g) Calculate the molarity of the hydrochloric acid solution.
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Could a 25 cm3 volumetric flask be replaced by a 25 cm3 pipette to measure the solution poured into a conical flask for titration? Explain.
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What mass of helium has a volume of 125.0 L if the density of helium gas is 0.1787 g/L ?
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can the NaOh be blown out of the pipette to reduce the time for the transfer ?
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structure od serylgylcine
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why is water not used in a thermometer
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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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