Upgrade to remove ads
Chapter 3 practice
Terms in this set (57)
Commonality between Earth and Venus
Which gas is central to the discussion of global climate change?
Both Venus and Earth have higher average surface temperatures than expected because ___
Both planets have atmospheres that trap radiation
Which correctly describe atomic mass?
1. Atomic masses are defined relative to the mass of a carbon-12 atom
2. The atomic mass of an element can be read from the periodic table
For any element, the atomic mass recorded on the periodic table is not a whole number since it is a(n) ___ of the masses of its naturally occurring isotopes
Correct order of steps to define shape of molecule
1. Determine the number of outer electrons associated with each atom in the molecule
2. Arrange the outer electrons in pairs, ensuring that all atoms other than hydrogen obeys the octet rule
3. Count the groups of outer electron pairs to predict the shape
Match the compounds to their molar mass
1. CCl4 - 154.0 g
2. PF3 - 88.0 g
3. SO2 - 64.0 g
Which of following correctly interprets balanced equation CH4 + 2O2 -> CO2 + 2H2O?
1. 1 molecule of CH4 reacts with 2 molecules of O2
2. 15 mol of CH4 will produce 15 Mol of CO2 when burned completely in O2
3. 1 mole of CH4 produces 1 mole of CO2 when reacted with 2 moles of O2
The most abunden isotope of ___ is the internationally accepted standard for determine atomic mass
Match the electron pair
1. b - bonding electron pair
2. a - lone pair
1. 4 bonding pairs - tetrahedral
2. 3 bonding pairs and 1 lone pair - trigonal pyramid
3. 2 bonding pairs - linear
4. 2 bonding pairs and 2 lone pairs - bent
5. 3 bonding pairs - trigonal planar
One ___ of any substance contains Avogadro's number of particles
Which describes underlying principle used to determine molecular shape from a Lewis structure
Each group of outer electrons around a central atom is located as far from the others as possible
Which is following Avovadro's number?
There are 6.02 x 10^23 atoms in 12 g of carbon-12
Select the options that correctly reflect the mass ratios and mass percentages of the elements in SO3
1. The mass ratio of S is .400
2. The mass percentage of O is 60%
Determine shape of a molecule
1. The shape of the molecule is dictated by the most stable arrangement of the outer electron pairs
2. Both bonding and nonbonding electron pairs must be considered
3. The shape is predicted using the Lewis structure
The molar mass of any substance is the mass of 1 ___ of the particles of that subtance
How much sulfur dioxide (SO2) can be produced by the combustion of 21 tons of sulfur?
Which of the following are examples of fossil fuels?
Natural gas, coal, petroleum
Molecular shape to bond angle
1. Tetrahedral - 109.5°
2. Trigonal planar - 120°
3. Linear - 180°
4. Trigonal pyramidal - <109.5°
Which rep of SO2 is correct
1. Molecular formula - C
2. Lewis structure - B
3. Space-filling model - A
Interpret: Molar mass of NO2 = 46g; atomic mass of N = 14g; atomic mass of O = 16g
1. Mass ratio of nitrogen in NO2 is equal to .304
2. There are 14g of N in every 46g of NO2
3. %O in NO2 is = to 32/46 x 100
There are exactly ___ x 10^23 atoms in 12g of carbon-12. This number is called ___ number
Fuels formed by natural processes such as the decomposition of prehistoric organisms are called ___ fuels
The molecule shown has a ___ shape
Greenhouse gasses in order
N2O, CH4, CO2
Molar mass of CH2Cl2 is 85g, while atomic mass of carbon is 12g. Mass ratio of carbon in this compound is:
Release CO2 into the atmosphere?
Describe how aerosols interact with radiation and affect Earth's temperature?
1. Aerosols promote cloud formation, allowing more solar radiation to be reflected. This has a cooling affect.
2. Aerosols scatter incoming radiation efficiently, decreasing the amount of radiation available for greenhouse gases to absorb
Match each source of atmospheric methane (CH4) to the process by which methane is formed and/or released into the atmosphere
1. Wetlands and landfills - CH4 is produced from the decomposition of organic matter by anaerobic bacteria
2. Oceans - CH4 may be released from methane hydrates due to drilling
3. Farming - CH4 produced in the digestive systems of cattle and sheep is released to the atmosphere
4. Fossil fuels - CH4 found together with oil and coal deposits is released by drilling and mining
Match the radiation
1. IR radiation - cause to vibrate
2. UV radiation - breaks bonds, cause to dissociate
3. Microwave - cause to spin faster
Conclusions reached by IPCC
1. The burning of fossil fuels has a major impact on climate change
2. Human activities play an important role in climate change
3. The average global temp of Earth is increasing
The proportion of incoming radiation that is reflected by a surface is called ___. This quantity is a measure of the reflectivity of a surface.
1. Increasing atmospheric CH4 - causes a warming effect
2. Increasing cloud cover - causes a cooling affect
3. An example of a positive forcing is - increasing levels of GHGs in the atmosphere
4. An example of a negative forcing is - increasing levels of aerosols in the troposphere
One system used in the US to encourage reduction in CO2 emissions is the ___-and-___ system, which sets an upper limit for CO2 emissions for the year.
The time required for a gas that has been added to the atmosphere to be removed is called the ___ of the gas, aka "turnover time"
Global atmospheric lifetime
The natural process by which Earth's atmospheric gases trap the infrared radiation radiated by Earth is called the ___ effect. This causes Earth's average surface temp to be ___ than that predicted when considering the distance of the Earth from the Sun.
What is the mass of nitrogen in this quantity of nitric acid?
Which is correct about carbon cycle?
1. CO2 is generated by the combustion of fossil fuels
2. The main atmospheric form of carbon is CO2
Which human activities increase the levels of atmospheric CO2?
Respiration, replacing trees with cultivated crops, burning fossil fuels
The process by which atmospheric gases trap and return more than 80% of the heat energy radiated by Earth is called the ___ greenhouse effect
Which of the following explains how carbon-14 levels can provide info about source of atmospheric CO2?
1. CO2 produced by burning fossil fuels causes the carbon-14 concentration in the atmosphere to decrease
2. CO2 produced by burning of fossil fuels contains virtually no carbon-14
Contrast climate change and ozone depletion
1. CO2, CH4, H2O, & N2O - major gases influencing climate change
2. CFCs - major gases influencing ozone depletion
3. Global warming effects - due to absorption of IR radiation by molecules
4. Ozone depletion - results from absorption of UV radiation by molecules
In order to predict if a given molecule can act as a greenhouse gas, we must use its Lewis stricture to determine its molecule
Estimate amount of CO2 and other greenhouse gas emissions produced by an individual given time frame referred to as individual's carbon
Which best describes molecule that can absorb IR radiation?
Its bond vibrations must involve a change in charge distribution
In order for a molecule to absorb IR radiation, the energy of the IR radiation must
Match one of the vibration energy modes of the molecule
Approx value of bond
Less than 109.5°
Direct measures of atmospheric CO2 levels in Hawaii show that since 1960 ___
1. CO2 levels in given year fluctuate depending on time of year
2. Annual average CO2 levels have increased steadily
Which are common greenhouse gases?
CO2, H2O, methane
Strategy of reducing CO2 levels
1. CO2 captured from combustion is injected into depleted oil fields to enhance oil recovery
2. CO2 is separated from other combustion products and stored in geologic locations
A gas that is able to absorb and trap infrared radiation, resulting in a warming of the atmosphere, is called a(n) ___ gas
Which are NOT greenhouse gases
1. a - in the plane of the page
2. b - in front of the plane
3. c - behind the plane
Any gas that can absorb ___ radiation can act as a greenhouse gas
The global warming ___ (GWP) of a greenhouse gas represents relative contribution
Lone pair occupies ___ space than a bonding pair, therefore ___ the bond angle between bonding pairs
THIS SET IS OFTEN IN FOLDERS WITH...
Chapter 4 Practice
Chapter 1 practice quiz
Chapter 1 Practice Quiz 2
Chapter 2 Practice Quiz 1
YOU MIGHT ALSO LIKE...
Chem 9 Chapter 3
Chem 9 Chapter 3
CHM 1020 Chapter 3
OTHER SETS BY THIS CREATOR
Chemistry Final Hw
Chemistry Chapter 12
Chemistry Chapter 11
Chemistry Chapter 10