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Exam 3: The Chemistry of Global Climate Change

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Question 31

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In their fourth and most recent report published in 2007,the vast majority of scientists agreed on several key points.Which of the following is NOT one of those points?

A) If the rate of greenhouse gas emissions is not curtailed,our water resources,food supply,and even our health will suffer.
B) Human activities (primarily the combustion of fossil fuels and deforestation) are responsible for much of the recent warming.
C) The Earth is getting warmer.
D) All of the above were mentioned as key points.

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Question 32

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Forcings are

A) geological changes that promote volcanic eruptions.
B) mechanisms for sequestering CO₂ endorsed by signers of the Kyoto Protocol.
C) factors that affect the annual global mean surface temperature.
D) changes in geographical distribution of plant,animal,and insect species brought on by climate change.

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Question 33

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Hydrogen gas (H₂) is a promising alternative to fossil fuels.How many molecules are present in 1.0 kg of hydrogen gas?

Predict the geometry of nitrous oxide,N₂O (atomic order NO) .

Which atmospheric component does not contribute to global warming?

How many atoms are present in 0.375 mol of palladium (Pd) atoms?

Although coal is a complex mixture of substances,its elemental composition can be approximated by the formula C₁₃₅H₉₆O₉NS.Using this formula,predict the amount of CO₂ released from the combustion of 1.00 × 10⁶ metric tons of coal (about the annual average for a coal-fired power plant) .1 metric ton = 1 × 10³ kg

Find the molar mass of ethanol,C₂H₆O.

Which of the following are ways that aerosols may affect climate?

Which occurrences or processes are expected to reduce the level of atmospheric carbon? I.Decaying plant and animal remains II.The growth of trees III.Formation of carbonate rock in the ocean IV.Animal respiration

What is the coefficient for oxygen in the balanced chemical equation for the combustion of heptane (C₇H₁₆) ? Unbalanced equation: C₇H₁₆ + O₂ → CO₂ + H₂O

The greenhouse effect refers to the process by which

Tropospheric ozone (O₃) is a greenhouse gas.Why is O₃ not assigned a Global Warming Potential (GWP) ?

Ethanol (C₂H₆O) is a common intoxicant and fuel produced from the fermentation of various grains.How many moles of ethanol are represented by 50.0 kg of ethanol?

What is the yearly change in the carbon dioxide concentration in the Earth's atmosphere?

In order to make useful predictions,which factors must be accounted for by climatic models? I.Aerosol Emissions II.Land Use III.Solar Irradiance

Which process plays the most important role in the greenhouse effect?

Octane (C₈H₁₈) is one of the principal components of gasoline.How many moles of CO₂ are produced during the combustion of 3.0 mol of octane? Unbalanced equation: C₈H₁₈ + O₂ → CO₂ + H₂O

The Intergovernmental Panel on Climate Change (IPCC) issued a report in 2007 that attached probabilities to the predictions and statements made.Which prediction/statement was considered "Very Unlikely"?

Which of the following is NOT a likely consequence of increased carbon dioxide concentration in the atmosphere?