Identify the choice that best completes the statement or answers the question. W

Question

Identify the choice that best completes the statement or answers the question. Write your answer on the line provided. For the following reaction at equilibrium in a reaction vessel, which one of these changes would cause the Br_2 concentration to increase? 2NOBr(g) 2NO(g) + Br(g), Delta H degree = 30 kJ/mol a. Lower the temperature. b. Remove some NO. c. Remove some NOBr. d. Compress the gas mixture into a smaller volume. e. Add a catalyst Identify the conjugate base of HPO_4^2- a. H_2O b. H_2P0_4^- c. H_3PO_4 d. PO_4^3- e. OH^- Unsaturated hydrocarbons a. contain at least one double or triple carbon-carbon bond. b. contain at least one element other than hydrogen and carbon. c. contain the maximum number of hydrogens that can bond with the carbon atoms Present. d. cannot form structural isomers. e. cannot undergo addition reactions. A balanced redox equation must have which of the following. I. The same number of each type of atom on both sides of the equation II. The total number electrons lost in the oxidation equal to total number of electrons gained in the reduction III. The same total charge of all ionic species on both sides of the reaction IV. H_2O present as a product or a reactant a. I, II and III b. I and II c. I, III, and IV d. I, II, III, and IV e. Ill and IV

Explanation / Answer

1. remove some NO

Decrease the conc of NO to favor farward reaction.

2. conjugate base = acid-H+

    HPO42- -------> H2PO4-

3. Carbon - carbon between double bond or triple bond containing hydrocarbons are called unsaturated hydrocarbons.

b. contains at least one double bond or triple carbon-carbon

4. b I and II

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