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balanced molecular equation for Na2S(aq)+CuSO4(aq)
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What is the number of moles i the followi element.show your work and write your answer in scientific notation and significant figures 3.25 x 10 to the 20 atoms of lead,pb
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Calculate the volume of carbon dioxide at 273 K and 1.01 * 10^5 Pa which would be produced when 1.25g of calcium carbonate reacts completely with HCL
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Write the product of the following reactions (if no reaction, write NR): CH3CH2CH2OH -> [O]
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A sample of oxygen gas has a density of x g/L at a pressure of 0.727 atm and a temperature of 50 oC. Assume ideal behavior.
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Imagine that you have a 6.50L gas tank and a 4.50L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 , to what pressure should you fill the acetylene tank to...
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Without doing any calculations, determine the sign of \Delta S_{{\rm{sys}}} for each of the following chemical reactions.2KClO3(s) --> 2KCl(s) + 3O2(g)
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Considerable interest exists in the conversion of coal into liquid products for production of desirable chemicals. Two of the main gases produced from in situ (in ground) coal combustion are H2 and CO. These product gases can be combined to form methanol (H2+CO-> CH3OH). fresh feed...
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What is the initial pH for the titration of 30.0 mL of 0.850 M NH3 with 0.100 M HCl. Kb for NH3 = 1.8 10 5.
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if 116 g of butane burns in the presence of 320. grams of ocygen how much carbon dioxide will be produced
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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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