At 500 oC cyclopropane (C3H6) rearranges to propene (CH3CHCH2) as shown by C3H6(g) –> CH3CHCH2(g).  The reaction is first-order with a half-life of 17 minutes. How long will it take for the concentration of C3H6 to drop to 12.5% of its initial value at 500 oC?

If one mole of each is dissolved in 1.00 L of water, which will lower the vapor pressure the most?

The following set of data was obtained by the method of initial rates for the reaction:2 HgCl2(aq) + C2O42-(aq) → 2 Cl-(aq) + 2 CO2(g) + Hg2Cl2(s) Experiment [HgCl2] [C2O42-] Rate 1 0.10 M 0.10 M 1.3 x 10-7 M/s 2 0.10 M 0.20 M 5.2 x 10-7 M/s 3 0.20 M 0.20 M 1.0 x 10-5 M/s  What is the rate law for the reaction?

True or False: With periodontitis, there is alveolar bone loss, which occurs first at the alveolar crest

What is the vapor pressure over a solution that contains 0.850 mol CaCl2 dissolved in 27.7 mol of water at 298 K. The vapor pressure of water is 23.76 mmHg at 289 K. (HINT: Don’t forget to find total moles of ions.)

Match the correct Angle’s Classification for each picture below. 1.  2.  3.  4. 

Name the cells that are responsible for enamel development.

What type of epithelium (shown in the picture below) has a single layer of cells, but gives the appearance that it has more than a single layer of cells?

Using the universal numbering system for the deciduous dentition, what is the proper identifier for the deciduous maxillary right canine?

Which of the following is NOT part of the periodontium?