Chemistry Exam #1 chapter 2
If we assume that the top of Mt. Everest is the highest land mass on earth, hikers who scale its summit are standing in the ?
troposphere
The lowest (or closest to the ground) layer of our atmosphere is the?
troposphere
Ozone is considered an air pollutant in the _______ but is a valuable protective layer in the _______ ?
troposphere; stratosphere
Of five major gaseous components of air, Which is the only one to vary significant in concentration from place to place and from day to day?
water vapor
Which color, as used in the Air Quality Index, warns that level of a pollutant is hazardous, the most dangerous level?
Marron
What is the primary component of an exhaled breath?
N2
The EPA limit for CO is 9 ppm. Express this number as a percentage?
0.0009 percent
Which correctly pairs indoor pollutant with its source?
O3 and electrical arcing
What are examples of technological advances that has reduced pollution ?
Paint with reduced VOCs Catalytic converters Low sulfur diesel fuels
The burning of coal produces sulfur dioxide, SO2, a pollutant that slowly reacts in air to form SO3. Sulfur trioxide dissolves into airborne water droplets to from a very corrosive solution of sulfuric acid. Which is a product of burning coal that hastens the transformation of sulfur dioxide into sulfur trioxide?
Particles of ash
What two factors are considered when determining the risk assessment for air pollutants ?
Toxicity and exposure
Even though the concentration of air pollution has gone down over time, people in some metropolitan areas still breath are that contains unhealthy levels of pollutants ? True/False
True
Which is the balanced chemical equation showing hydrogen peroxide (H2O2) decomposing into hydrogen (H2) and oxygen (O2)?
H2O2 --> H2 + O2
Catalytic converts reduce the amount of _____ in car exhaust ?
CO
What is the formula for carbon disulfide?
CS2
Which pollutant are you more likely to encounter in dangerous concentrations indoors rather than outdoors?
Carbon monoxide
The ______ concentration in the air over the desert differs dramatically from that in the air in the tropical rainforest?
H2O
Which chemical components are given off in car exhaust ?
H2O CO2 NOx *All of these choices are correct
Which air pollutant is the second-leading cause of lung cancer worldwide, behind tobacco smoke?
Radon
Currently, the primary source of sulfur dioxide emissions into the atmosphere is ?
coal burning power plants
P2O5 is the chemical formula for?
diphosphorus pentoxide
Air is a(n) ?
mixture