Levels Tought:
Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Apr 2017 |
Last Sign in: | 234 Weeks Ago, 2 Days Ago |
Questions Answered: | 12843 |
Tutorials Posted: | 12834 |
MBA, Ph.D in Management
Harvard university
Feb-1997 - Aug-2003
Professor
Strayer University
Jan-2007 - Present
Note:
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            1.True or false questions
A. All compounds containing hydrogen are acids.
B. In water as [H+] increases pH increases
C. One function of an auto catalytic converter is to convert CO
     to CO2            Â
D. Agricultural chemicals are a source of water pollution.
E. When an atom emits gamma radiation it becomes a different element.
F. As a radioactive element decays its half life remains constant.
GÂ Â Chlorofluorocarbon compounds are believed to be catalysts for the
                       Stratospheric decomposition of ozone.
H. When water is added to an acid solution the pH changes.
I.   None of the products of fission of uranium are radioactive.
J.   Two key gases contributing to acid rain are NH3 and CH4
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              2.  A water solution has 1.00x10-4 moles of H+ in 10.00 liters
                     A. What is the [H+] in the solution?
                     B. What is the pH ?
                     C. What is the [OH-] ions?
                     D. Is the solution acidic or basic ?
                     E. What is the pH if water is added to make the volume 100.0 liters?
            3.  Giving reasons for your answers, would each of the following water solutions
                  have a pH less than, equal to, or greater then 7.00?
                  A. HNO3  B. NaCl  C. NH3 D, CH3COOH E. SO3
            4. What is the pressure in atmospheres of 175 grams of N2  gas in
                  an 8.00L container at 35.0oC ?
            5.                      2NaN3 â 2Na + 3N2
                  How many liters of N2 gas  result at 25.0oC and 0.975 atm when 105g
                  of NaN3 react ?
            6. A. How do the atomic number and mass number change when an atom
                      emits a beta particle?
                 B. How do the atomic number and mass number change when an atom
                     emits an alpha particle?
            7. How many grams of NaOH are in 865mL of a 0.500M solution?
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            8.  Nuclear fission and nuclear fusion are both high energy producing
                  processes. How do they differ?
            9.   If a person breathes in 20.0 m3 of air per day  and the air contains 0.225
                   milligrams of particulates per m3, How many grams of particulates
                   does the person breathe in per day?
            10. Person A has well water with 0.011 ppm (parts per million) of Pb2+.
                              Person B has well water with 6.50x10-6 grams of Pb2+ in 5.00L.
                   Giving a reason for your answer, which well water has a lower
                   Concentration of Pb2+ ?
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