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Calculate the amount of heat needed to melt 2.00kg or iron at its melting point 1809K given that Hfus=13.80
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"during petroleum refining catalysts play an extremely important role during the"
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A steel reaction vessel has a movable piston that is set to allow an enclosed sample of gas expand and contract against a constant external pressure of 1.12 atm. A 2.50-g sample of PCl5 (g) is placed in this vessel at a temperature of 250 C and a pressure of 1.12 atm. The temperature is...
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The volume of 350. mL of gas at 25C is decreased to 125 mL at constant pressure. What is the final temperature of the gas
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in a solution, which component is considered the solvent?
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A small drop of water assumes an almost spherical form on a Teflon surface. Explain why.
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Addition of small amounts of oxaloacetate or malate to suspensions of minced pigeon-breast muscle stimulated the oxygen consumption of the preparation. Surprisingly, when the amount of oxygen consumed was measured, it was about 7 times more than the amount necessary to oxidize the added...
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how many moles of waer can be made from 4 moles of oxygen gas and 16 moles of hydrogen gas? what is the limiting reagent?
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2 AL subscript2 (CO subscript3)subscript3, how many atoms?
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use the activity series of metals to write a balanced chemical equation for this single replacement reaction Au(s) + KNO3 (aq)
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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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