Exam 4: Three Major Classes of Chemical Reactions

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Which one of the following substances,when dissolved in water at equal molar concentrations,will give the solution with the lowest electrical conductivity?

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Potassium chloride,KCl,sodium sulfate,Na2SO4,glucose,C6H12O6,carbon dioxide,CO2 and ammonium phosphate, (NH4)3PO4,are soluble in water.Which one produces the largest number of dissolved particles per mole of dissolved solute?

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Sodium tripolyphosphate is used in detergents to make them effective in hard water.Calculate the oxidation number of phosphorus in Na5P3O10.

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The compound P4O10 is used in refining sugar.Select the classification for the reaction in which it is synthesized. P4(s)+ 5O2(g) \to P4O10(s)

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