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?

HIPAA is a law that dictates the extent to which protected health information can be shared. What does the acronym “HIPAA” stand for?  H: I: P: and A: A:

List 4 organs that are either completely or mostly found in the left lower quadrant.

List three “classic” signs and symptoms, according to the text, of a patient experiencing cardiac compromise.