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Calculate the mass of water produced when 6.44 g of butane reacts with excess oxygen
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Assume that 100.0 of 0.200 and 50.0 of 0.400 are mixed in a calorimeter. The solutions start out at 22.50 , and the final temperature after reaction is 24.28 . The densities of the solutions are all 1.00g/ml , and the specific heat of the mixture is 4.2J/gC. What is the enthalpy change for...
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how many moles are contained in 5.20g s
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Which of the following compounds is a nonelectrolyte when dissolved in water? NaBr, Cu(NO3)2, NH3, KOH, or CaCl2
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How many structural formulas are there of all aldehydes having the molecular formula C6H12O?
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A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calcu- late the mass of pure acetic acid in 120 mL of this solution at 20 C. Answer in units of g.
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A solution of ethanol (C2H5OH) in water is prepared by dissolving 67.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 230.0 mL of solution. What is the molarity of the ethanol in this solution?
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Calculate the mass of water produced when 3.80 g of butane reacts with excess oxygen
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How many moles of cations are in 1.60 mol of {\rm{K}}_2 {\rm{SO}}_4?
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How many moles of KMnO4 are present in 220 mL of a 4.10 10 2 solution?
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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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