Question 1

In order to make useful predictions,which factors must be accounted for by climatic models?
I.Cooling effect of atmospheric aerosols
II.Smoke,haze,and cloud cover
III.Change in land use
IV.Combustion of fossil fuels

Accepted Answer

Think about all the different things that would go into the very complex calculation.

Question 2

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"?

Accepted Answer

See Table 3.6 for 2007 IPCC conclusions.

Question 3

Which vibrational mode for carbon dioxide is not expected to contribute to the greenhouse effect?

Accepted Answer

Remember that vibrations that cancel each other out do not contribute to warming.

Question 4

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?

Accepted Answer

Remember that 50.0 kg is 50,000 g.

Question 5

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

Accepted Answer

Remember that one mole is 6.02 x 10²³ items and that hydrogen has a molar mass of 2.016 g/mole.

Question 6

Argon,which comprises almost 1% of the atmosphere,is approximately 27 times more abundant than CO₂,but does not contribute to global warming.Which explanation accounts for this fact?

Accepted Answer

Remember that it is vibration of bonds that causes warming.

Question 7

These data show the movement of carbon through its various forms on earth.Which value is known with the smallest percent error?

Accepted Answer

Percent error means taking the error and dividing it by the whole amount associated with the error.

Question 8

The top graph shows the mean temperature over the past 160,000 years as determined from ice-core data.Which of graphs A through D best represents the carbon dioxide concentration in air over the same time period as measured from air bubbles trapped in the ice cores?

Accepted Answer

Remember that temperature and CO₂ concentrations follow the same trends.

Question 9

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

Accepted Answer

Remember that plants take in CO₂ while animals exhale CO₂.

Question 10

What evidence indicates that the rising atmospheric CO₂ levels are caused by the combustion of fossil fuels?

Accepted Answer

Remember that fossil fuels are made from plants and animals that died many years ago.

Question 11

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

Accepted Answer

Remember that you will have to write and balance a combustion equation for coal.

Question 12

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

Accepted Answer

Remember to balance CO₂ and H₂O before the O₂.

Question 13

What is the effect of infrared energy on matter?

Accepted Answer

Remember that this is the mechanism by which atmospheric gases trap heat.

Question 14

LP gas (liquid propane,C₃H₈)is the fuel used in gas grills as well as a main source of heat energy for many rural residences.What is the mass of 5.83 × 10¹⁷ molecules of liquid propane?

Accepted Answer

Remember that one mole is 6.02 x 10²³ items and that you must add up the molar mass of propane from the periodic table.

Question 15

Which conclusion was considered "very likely" in the 2007 report of the Intergovernmental Panel on Climate Change?

Accepted Answer

See Table 3.6 for 2007 IPCC conclusions.

Question 16

The history of average global temperature for the last 160,000 years is derived from isotopic analysis of ice layers in Antarctica.Scientists study the ______ ratio in ______.

Accepted Answer

Think about which of these would give information about rain and snow.

Question 17

Although coal is a complex mixture of substances,its elemental composition can be approximated by the formula C₁₃₅H₉₆O₉NS.Using this chemical formula,calculate the percentage,by mass,of carbon (C)in coal.

Accepted Answer

Remember that you must include all the carbon atoms and divide by the total mass of the molecule.

Question 18

The carbon cycle refers to the

Accepted Answer

Remember that this is one of the global elemental cycles.

Question 19

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

Accepted Answer

Remember to balance the equation then use those coefficients as a mole ratio.

Question 20

Which country has the highest per capita emission of carbon dioxide?

Accepted Answer

Remember that per capita means "per person".

Quiz 3: The Chemistry of Global Climate Change

In order to make useful predictions,which factors must be accounted for by climatic models? I.Cooling effect of atmospheric aerosols II.Smoke,haze,and cloud cover III.Change in land use IV.Combustion of fossil fuels

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 vibrational mode for carbon dioxide is not expected to contribute to the greenhouse effect?

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?

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

Argon,which comprises almost 1% of the atmosphere,is approximately 27 times more abundant than CO₂,but does not contribute to global warming.Which explanation accounts for this fact?

These data show the movement of carbon through its various forms on earth.Which value is known with the smallest percent error?

The top graph shows the mean temperature over the past 160,000 years as determined from ice-core data.Which of graphs A through D best represents the carbon dioxide concentration in air over the same time period as measured from air bubbles trapped in the ice cores?

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 evidence indicates that the rising atmospheric CO₂ levels are caused by the combustion of fossil fuels?

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

What is the effect of infrared energy on matter?

LP gas (liquid propane,C₃H₈) is the fuel used in gas grills as well as a main source of heat energy for many rural residences.What is the mass of 5.83 × 10¹⁷ molecules of liquid propane?

Which conclusion was considered "very likely" in the 2007 report of the Intergovernmental Panel on Climate Change?

The history of average global temperature for the last 160,000 years is derived from isotopic analysis of ice layers in Antarctica.Scientists study the ratio in .

Although coal is a complex mixture of substances,its elemental composition can be approximated by the formula C₁₃₅H₉₆O₉NS.Using this chemical formula,calculate the percentage,by mass,of carbon (C) in coal.

The carbon cycle refers to the

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

Which country has the highest per capita emission of carbon dioxide?

Quiz 3: The Chemistry of Global Climate Change

In order to make useful predictions,which factors must be accounted for by climatic models? I.Cooling effect of atmospheric aerosols II.Smoke,haze,and cloud cover III.Change in land use IV.Combustion of fossil fuels

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 vibrational mode for carbon dioxide is not expected to contribute to the greenhouse effect?

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?

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

Argon,which comprises almost 1% of the atmosphere,is approximately 27 times more abundant than CO2,but does not contribute to global warming.Which explanation accounts for this fact?

These data show the movement of carbon through its various forms on earth.Which value is known with the smallest percent error?

The top graph shows the mean temperature over the past 160,000 years as determined from ice-core data.Which of graphs A through D best represents the carbon dioxide concentration in air over the same time period as measured from air bubbles trapped in the ice cores?

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 evidence indicates that the rising atmospheric CO2 levels are caused by the combustion of fossil fuels?

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

What is the effect of infrared energy on matter?

LP gas (liquid propane,C3H8) is the fuel used in gas grills as well as a main source of heat energy for many rural residences.What is the mass of 5.83 × 1017 molecules of liquid propane?

Which conclusion was considered "very likely" in the 2007 report of the Intergovernmental Panel on Climate Change?

The history of average global temperature for the last 160,000 years is derived from isotopic analysis of ice layers in Antarctica.Scientists study the ______ ratio in ______.

Although coal is a complex mixture of substances,its elemental composition can be approximated by the formula C135H96O9NS.Using this chemical formula,calculate the percentage,by mass,of carbon (C) in coal.

The carbon cycle refers to the

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

Which country has the highest per capita emission of carbon dioxide?

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?

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

Argon,which comprises almost 1% of the atmosphere,is approximately 27 times more abundant than CO₂,but does not contribute to global warming.Which explanation accounts for this fact?

What evidence indicates that the rising atmospheric CO₂ levels are caused by the combustion of fossil fuels?

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

LP gas (liquid propane,C₃H₈) is the fuel used in gas grills as well as a main source of heat energy for many rural residences.What is the mass of 5.83 × 10¹⁷ molecules of liquid propane?

The history of average global temperature for the last 160,000 years is derived from isotopic analysis of ice layers in Antarctica.Scientists study the ratio in .

Although coal is a complex mixture of substances,its elemental composition can be approximated by the formula C₁₃₅H₉₆O₉NS.Using this chemical formula,calculate the percentage,by mass,of carbon (C) in coal.

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