Consider the data you graphed in Developing Skills C.2.

a. List two scientific claims you could make based on the data or the graph.

b. For each claim, cite evidence for making that claim.

Use your own words to describe each of the following : How the relationships described in your answers.

What would happen to the pressure exerted by a gas sample if both the temperature of the gas and the volume occupied by the gas were doubled , while holding the amount of gas constant?

Use KMT to explain why

a. gases expand to fill the space available.

b. gas pressure is proportional to temperature at constant volume .

U.S. weather reports generally express air pressure in units of inches of mercury . During a severe storm, the barometric pressure can drop as low as 27.2 inches of mercury. Convert this air-pressure value to:

a. millimeters of mercury (mmHg). (Hint: l inch = 25.4 mm)
b. atmospheres (atm).
c. kilopascals (kPa).

Do gases in the atmosphere ever react with one another? How do you know?

What happens to the molecules in a sample of gas as it is heated?

What causes acid rain?

a. Has the atmosphere's composition changed significantly throughout human history?

b. What evidence can you cite to support your claim?

How is air pollution influenced by weather and climate?

Many inexpensive sunglasses block visible light, but not ultraviolet radiation . Explain the hazards of wearing such sunglasses at the beach or on a ski slope during a bright, sunny day

What are advantages an d disadvantages of scrubbing as a strategy for air-po llution reduction?

Based on your knowledge of gas properties, predict what will happen to the density of a 100.0-g helium gas sample if you heat it from room temperature to $62^{\circ} \mathrm{C}$ at constant pressure.

A sample of a pure gas has a mass of 6. 7 g and exerts a pressure of 1.5 atm on a 2.5-L container at 298 K. What is the gas?