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In the reaction:  3H2  +  N2  

Atoms that are sp2 hybridized form ____ pi bond(s).

The reaction A → B + C is known to be zero order in A with a rate constant of 5.0 × 10–2 mol/L·s at 25°C. An experiment was run at 25°C where [A]0 = 1.0 × 10–3 M.  How much time (minutes) must elapse before the concentration falls to 3.0 x 10-5 M?   STATE JUST YOUR ANSWER INCLUDING UNITS IN THE TEXT BOX BELOW. Do not show work in the text box.  # your question on scratch paper and label answer,  Include units   If your number is in scientific notation use the superscript or subscript buttons in the task button up in the task bar above. Show all work or receive no credit Show work to webcam upon completion of this problem.  Show units and chemical name or formulas if applicable.   Spelling counts.  Sig Figs will not count unless otherwise stated.  You will be asked to scan all your work at the end of the exam.  

The rate constant k is dependent on I. the concentration of the reactant II. the nature of the reactants III. the temperature IV. the order of the reaction

The experimental rate law for the decomposition of nitrous oxide (N2O) to N2 and O2 is Rate = k[N2O]2. Two mechanisms are proposed: I. N2O → N2 + O   N2O + O → N2 + O2 II. 2N2O N4O2   N4O2 → 2N2 + O2 Which of the following could be a correct mechanism?

Adding salt to water decreases the freezing point of the water since it lowers the vapor pressure of the ice.

In general, the value of the equilibrium constant for a chemical reaction does NOT depend on

What is the electron geometry of the following molecule?  

The questions below refer to the following diagram:   At what point on the graph is the activated complex present?

The following questions refer to the reaction shown below:       Initial Rate of   Initial [A] Initial [B] Disappearance of A Experiment (mol/L) (mol/L) (mol/L·s) 1 0.16 0.15 0.08 2 0.16 0.30 0.30 3 0.08 0.30 0.08   a.  Write the rate law with the orders of reaction calculated – show work b.  Calculate the rate constant for this reaction – include the units STATE JUST YOUR ANSWER INCLUDING UNITS IN THE TEXT BOX BELOW. Do not show work in the text box.  # your question on scratch paper and label answer,  Include units   If your number is in scientific notation use the superscript or subscript buttons in the task button up in the task bar above. Show all work or receive no credit Show work to webcam upon completion of this problem.  Show units and chemical name or formulas if applicable.   Spelling counts.  Sig Figs will not count unless otherwise stated.  You will be asked to scan all your work at the end of the exam.