Consider the hypothetical reaction.X(g) + 2Y(g) → XY2 (g)∆/∆ t = −5.0 × 10−2 mol L−1 sec−1 ENTER THE LETTER CORRESPONDING TO YOUR SELECTION IN THE SPACE PROVIDED. What is the rate of formation of XY2 (g)?a.  0.10 mol L−1 sec−1b.  0.025 mol L−1 sec−1c.   0.05 mol L−1 sec−1d.  −0.05 mol L−1 sec−1e.  −0.025 mol L−1 sec−1

For a reaction that is first order with respect to and second order with respect to , which of the following will result in no change to the overall reaction rate. ENTER THE LETTER CORRESPONDING TO YOUR SELECTION IN THE SPACE PROVIDED. a. Doubling and halving b. Doubling and halving c. Doubling and Doubling d. Quadrupling and quadrupling .e. Quadrupling and halving

Which accounts for the increase in the rate of reaction when a catalyst is added to a reaction system? ENTER THE LETTER CORRESPONDING TO YOUR SELECTION IN THE SPACE PROVIDED. a. increase in ∆S for the reactionb. decrease in ∆H for the reactionc. increase in potential energy of the reactantsd. decrease in potential energy of the activated complexe. increase in potential energy of the products’ activated complex

The following 3 questions refer to the popular demonstration called “Elephants Toothpaste” in which the mechanism isbelieved to be: Step 1: H2O2 + I− → H2O + OI−Step 2: H2O2 + OI− → H2O + O2 + I− ENTER THE LETTER CORRESPONDING TO YOUR SELECTION IN THE SPACE PROVIDED. Identify the catalyst.a. O2b. OI−c. I−d. H2Oe. H2O2 Identify the intermediate:a. O2b. OI−c. I−d. H2Oe. H2O2 Which chemical equation is consistent with the mechanism provided?a. ½ H2O2 + I− → H2O + OI− + O2b. ½ H2O2 + I− → H2O + O2c. 2H2O2 → 2H2O + OI− + O2d. 2H2O2 + I− → 2H2O + O2e. 2H2O2 → 2H2O + O2

ENTER THE LETTER CORRESPONDING TO YOUR SELECTION IN THE SPACE PROVIDED.

If the units in the rate in a given experiment are mol L−1min−1 and the units of all concentrations are mol L−1, thenthe units of the rate constant associated with the rate law:  Rate= k2: ENTER THE LETTER CORRESPONDING TO YOUR SELECTION IN THE SPACE PROVIDED. a. mol L−1 min−1b. mol2 L−2 min−1c. mol−2 L−2 min−1d. L2 mol −2 min−1e. mol−3 L3 min−1

A sealed rigid container holds two first order reactant gases, A and B. If additional moles of gas B are added to the container while keeping the temperature constant, what can be said of the reaction under these conditions. ENTER THE LETTER CORRESPONDING TO YOUR SELECTION IN THE SPACE PROVIDED. a. The rate of the reaction will increase, as will the rate constant, k.b. The rate of the reaction will remain unchanged as will the rate constant, k.c. The rate of the reaction will remain unchanged but the rate constant, k, will increase.d. The rate of the reaction will increase but the rate constant, k, will remain unchanged.e. The rate of reaction will decrease as will the rate constant, k.

The Reaction below should be used for the next 3 questions. IO3− + 5I− + 6H+ → 3I2 + 3H2O The oxidation of iodide ions by iodate ions in acidic aqueous solution occurs according to the stoichiometry shown above. The experimentally determined rate law of the reaction is rate = k ENTER THE LETTER CORRESPONDING TO YOUR SELECTION IN THE SPACE PROVIDED. What is the order with respect to I− ?a. 1b. 2c. 3d. 5e. 6 According to the rate law for the reaction, an increase in the concentration of hydrogen ion has what effect on thisreaction?a. Nothing changes.b. The rate of reaction increases.c. The rate of the reaction decreases.d. The value of the rate law constant increases.e. The value of the rate law constant decreases. According to the rate law for the reaction, a decrease in the concentration of iodide ion has what effect on this reaction?a. Neither the rate nor the value of the rate law constant is changed.b. The rate of the reaction decreases and the value of the rate law constant decreases.c. The rate of the reaction decreases and the value of the rate law constant is unchanged.d. The rate of the reaction remains the same and the value of the rate law constant increases.e. The rate of the reaction decreases and the value of the rate law constant increases.

Which nurse should be assigned to a dying client who is experiencing symptoms of emotional distress?

In the text box, write a sentence with all the elements required. The sentence has to make sense, be grammatically correct, and meet all the requirements for full credit. Requirements: complex sentence that begins with an adverb clause of time at least one clause in the simple future  highlight subjects and verbs (different colors) in each clause and underline the conjunction