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