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| 1 |
The reaction for this question will
be used for questions 1 - 4. Write a balanced chemical equation for the reaction of
hydrogen with oxygen to give water. What is the sum of the lowest whole number set of
coefficients? |
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5 |
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4 |
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3 |
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6 |
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Default answer if you cannot figure it out. |
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| 2 |
For the reaction in number 1,
assuming ideal gas behavior and equal temperatures and pressures, how many liters of
oxygen are needed for complete combustion of 6.00 liters of hydrogen? |
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6.00 L |
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3.00 L |
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12.0 L |
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None of the previous answers. |
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| 3 |
For the reaction in number 1, how
many grams of water should be produced from the reaction of 6.00 liters of hydrogen at 127oC
and 1.00 atm with an excess of oxygen? |
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4.82 g |
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10.4 g |
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6.00x103 g |
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3.29 g |
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None of the previous answers. |
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| 4 |
The reaction for this question will
be used for questions 4 - 7. Write a balanced chemical equation for the reaction of ethane
(C2H6) with oxygen to give carbon dioxide and water. What is the sum
of the lowest whole number set of coefficients? |
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4 |
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13 |
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19 |
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12 |
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Default answer if you cannot figure it out. |
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| 5 |
For the reaction in number 4,
assuming ideal gas behavior and equal temperatures and pressures, how many liters of
oxygen are needed for complete combustion of 1.00 liters of ethane? |
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22.4 L |
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3.50 L |
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7.00 L |
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0.286 L |
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None of the previous answers. |
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| 6 |
For the reaction in number 4, if
3.0 grams of ethane are burned how many liters of carbon dioxide are formed at STP? |
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4.5 L |
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2.2 L |
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1.1 L |
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None of the previous answers. |
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| 7 |
For the reaction in number 4, if
3.0 grams of ethane are burned how many liters of carbon dioxide are formed at 750 torr and 25oC? |
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4.5 L |
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5.0 L |
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2.5 L |
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1.2 L |
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None of the previous answers. |
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| 8 |
The reaction for this question will
be used for questions 8 - 10. Write a balanced chemical equation for the reaction of
aluminum with hydrochloric acid to give aluminum chloride and hydrogen gas. What is the
sum of the lowest whole number set of coefficients? |
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4 |
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8 |
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12 |
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13 |
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Default answer if you cannot figure it out |
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| 9 |
When 5.4 grams of aluminum reacts
with an excess of HCl, how many liters of hydrogen gas should be obtained at 1.00 atm and
25oC? |
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4.9 L |
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0.62 L |
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7.3 L |
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None of the previous answers. |
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| 10 |
When a 0.350 gram sample of aluminum
reacts with excess HCl, a volume of 488 mL of hydrogen at a corrected pressure of 753 mm
at 25oC is obtained. What is the experimental value for the atomic mass of
aluminum from this experiment? |
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27.0 g/mol |
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17.7 g/mol |
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53.0 g/mol |
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26.5 g/mol |
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None of the previous answers. |
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| 11 |
The reaction for this question will
be used for questions 11 and 12. Ammonium nitrate is a very valuable fertilizer because of
its high nitrogen content. Unfortunately, the nitrogen content also makes it potentially
explosive. In 1947, ammonium nitrate on a ship in Texas City exploded killing 600 people
and injuring 3500. Write a balanced chemical equation for the decomposition of ammonium
nitrate into nitrogen, water and oxygen. What is the sum of the lowest whole number set of
coefficients? |
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9 |
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4 |
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8 |
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7 |
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Default answer if you cannot figure it out. |
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| 12 |
For each mole of ammonium nitrate
that decomposes, how many moles of gas are produced (because of the exothermicity of the
reaction, the water is produced in the gas phase)? |
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7 moles |
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0.29 moles |
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3 1/2 moles |
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None of the previous answers. |
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| 13 |
You may want to visit the site on
meteorology, climatology and atmospheric composition at:
http://www.physicalgeography.net/fundamentals/7a.html
to find the answers to the questions that follow. What are the three most abundant gases
in dry air? |
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nitrogen, oxygen, carbon dioxide |
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nitrogen, oxygen, hydrogen |
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nitrogen, oxygen, helium |
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carbon dioxide, oxygen, methane |
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None of the previous answers. |
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| 14 |
Which value below is the closest to
the percentage of the fourth most abundant gas (carbon dioxide) in dry air? |
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1% |
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0.1% |
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0.04% |
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0.01% |
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0.001% |
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| 15 |
Click on http://www.physicalgeography.net/fundamentals/7y.html
and observe Figure 7y-3. Calculate the approximate percentage increase
in atmospheric carbon dioxide concentration between the years 1750 and 1990. |
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1% |
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30% |
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5% |
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10% |
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None of the previous answers. |
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| 16 |
What is the formula of ozone? |
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NO2 |
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O |
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O2 |
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O3 |
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None of the previous answers. |
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| 17 |
Are the greenhouse effect and the
ozone hole strongly or very weakly connected? |
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Weakly. |
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Strongly. |
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