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Given the redox reaction: 2I-(aq) + Br2(l) 2Br-(aq) + I2(s) What occurs during this reaction? The I- ion is oxidized, and its oxidation number increases. The I- ion is oxidized, amd its oxidation number decreases. The I- ion is reduced, and its oxidation number increases. The I- ion...
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calculate the concentration (M) of sodium ion by diluting 50.0ml of 0.874 M solution sodium sulfide to a total volume of 250.0ml
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A flask contains 3.0 mol of H2 and 1 mol N2 gas, which reacts as shown below. 3H2 + N2 ---> 2NH3 If 2.0 mol of H2 is added to the flask, the reaction rate will...
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Determine [H3O+] for solutions with the pH value 7.5.
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a mass of 2.50 g of hydrated copper sulfate is placed in a crcible and heated. on heating, 1.59 g of white anhydrous copper sulfate is left behind. determine the ratio of water to copper sulfate
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Why are there small umps in the 1st ionization energy energies of the elements as you move across a period?
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Name each of the following compounds. Assume the acids are dissolved in water. A. HC2H3O2 B. NH4NO2
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Calculate the energy change for the reaction K(g) + I(g) K+(g) + I (g) given the following ionization energy (IE) and electron affinity (EA) values. K: 419 kJ/mol (IE) 48 kJ/mol (EA) Br: 1010 kj/mol (IE) 295 kJ/mol (EA)
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at equilibrium, HA has a concentration of .94 M and its conjugate base has a concentration of .06 M. calculate the Ka and Ph of this solution.
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If a student starts with 615g of Co(NO3)2 and obtains a 57.3% yield of CoS, what mass of CoS is isolated? Co(NO3)2 +K2S ---> CoS + 2KNO3
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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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