Elige el orden cronológico correcto de las civilizaciones mesoamericanas (más antiguo a más contemporáneo según su período clásico (período más importante).

What diagnostic test will you order STAT to be completed in your outpatient office to help confirm your differential diagnosis?

38. A client with a history of gastric esophageal reflux disease (GERD) has been taking an antacid.  The client has been seriously exceeding the dose prescribed for the condition.  Which of the following is the most serious complication of exceeding the dose prescribed?

34. The health care provider has ordered amoxicillin suspension 210 mg PO BID (by mouth twice daily) for a diabetic patient with a foot infection. Amoxicillin suspension is available in a concentration of 125 mg/5 mL. How many milliliters should the nurse administer for the morning dose? Round to the nearest tenth and label your answer.

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