A sleep disorder that may require the use of a machine to force air gently into the nasal passages is called __________________________.

ABAB Design Considering (a) mean changes across phases, (b) trend (slope) changes across phases, (c) shift in level at point of phase change, (d) latency of the change, (e) overlap of data points, (f) variability differences across phases, and (g) consistency in the overall pattern, conduct visual analysis of the graph above (7 pts) and provide interpretation of the results (3 pts). You do not have to address all (a-g). However, at the least, you should discuss the change in level (mean), trend, and variability along with explanation on unique feature/s of particular designs that strengthen the conclusions that can be drawn. The response will be graded on the overall quality of visual analysis and interpretation.

Which of the following are key characteristics of an experimental design that distinguish it from observational designs? Check all correct answers.

 You would like to know if frequent television viewing during the toddler years predicts obesity in older kids.  You enroll a sample of normal weight 2 year-old children who attend one of 20 day care centers in Miami-Dade County and follow them until they are 7 years old.  Every 3 months you collect information on their weight and height and reported time spent daily watching TV.   What type of study is this?

Acetylene (C2H2), an important fuel in welding, is produced in the laboratory when calcium carbide reacts with water.          CaC2 (s)  + 2 H2O (l) –> C2H2 (g) + Ca(OH)2 (aq) For a sample of acetylene collected over water, total gas pressure is 758 torr and the volume is 0.524 L.  At the temperature of the gas (296 K), the vapor pressure of water is 21 torr.  How many grams of acetylene are collected?

Considering the visible spectrum, which of the following colors of light will have the highest energy?

   Periodic Table.doc

A steel tank used for fuel delivery is fitted with a safety valve that opens if the internal pressure exceeds 1.32 atm.  If the tank is filled with a gas at 275 K and 0.998 atm and placed in a water bath at 348 K, will the safety valve open?

Use the following reactions and given ΔH values.                        C (s) + O2 (g) –>  CO2 (g)                                                     ΔH= -393.5 J             2 H2 (g) + O2 (g) –> 2 H2O (g)                                           ΔH=  -483.5 J             C5H12 (l) + 8 O2 (g) –>  5 CO2 (g) + 6 H2O (g)                ΔH = -3505.8 J   Calculate ΔH for the following reaction using Hess’ Law:                   5 C (s) + 6 H2 (g) –>  C5H12 (l)                                   ΔH =                            

Which element has the largest ionization energy?