As the temperature of a fixed gas increases the pressure will:
a. vary inversely
b. be unchanged
c. Increase
d. Be unchanged

A Breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 101.3 kpa total pressure if P He= 84.0kpa and P co2= 0.10kpa/
a. 17.3 kpa
b. 17.2kpa
c. 84.1 kpa
d. 101.2kpa

Which of these changes would not cause an increase in the pressure of a gaseous system?
b. The temperature is increased
c. The container is made larger

At sea level, atmospheric pressure is equal to:
a. 101.3kpa
b. 1 standard atmosphere
c. 760mm Hg
d. all of these

The average kinetic energy of water molecules is greatest in:
a. steam at 200C
b. liquid water at 90C
c. liquid water at 373C
d. ice at 0C

What is the measurement 11.001 mm rounded off to four significant figures?
a. 111 mm
b. 111.0 mm
c. 111.01 mm
d. 110 mm
e. 100 mm

Any part of a system with uniform composition and properties is called a(n)
a. mixture
b. solute
c. solvent
d. phase

Increasing the volume of a given amount of gas at a constant temperature causes the pressure to decrease because:
a. the molecules are striking a larger area with the same force
b. there are fewer molecules
c. the molecules are moving more slowly
d. there are more molecules

STP refers to:
a. 100C and 1 atm
b. 0C and 1 kpa
c. 0C and 1 atm
d. 100C and 760mm Hg
An example of a heterogeneous mixture would be:
a. sugar
b. water
c. water containing dissolved salt
d. vegetable soup

The conversion factor , 60 seconds/1 minute has how many significant figures:
a. one
b. two
c. one and two
d. zero
e. infinite

According to kinetic theory of gases:
a. the particles in a gas move rapidly
b. the particles of a gas move independently of each other
c. the particles in a gas are far apart
d. all of the above are true

Increasing the volume of a given amount of gas at a constant temperature causes the pressure yo decrease because:
a. the molecules are striking a larger area with the same force
b. there are fewer molecules
c. the molecules are moving more slowly
d. there are more molecules

The volume of a gas is doubled while the temperature is held constant. The pressure of the gas:
a. remains unchanged
b. is reduced by one-half
c. is doubled
d. depends on the type of gas

Which of the following is a solution?
a. sour milk
b. whipped cream
c. vinegar
d. milk

In the measurement 0.503 L, which digit is the estimated digit?
a. 5
b. the 0 between the 5 and 3
c. 3
d. the 0 to the left of the decimal point
e. there is no estimated digit in this measurement

The temperature at which the motion of particles theoretically ceases is:
a. 0C
b. 273C
c. -273K
d. 0K

As the temperature of the gas in a balloon decreases:
a. the volume increases
b. the pressure increases
c. the average kinetic energy of the gas particles decreases
d. all of the above are true

A pressure of 2.5 atm is equivalent to:
a. 41 atm
b. 1900 mm Hg
c. 3.0 x 10 mm Hg
d. 2.5 kpa

Which of the following mixtures do not exhibit the Tyndall effect?
a. colloids
b. solutions
c. emulsions
d. suspensions

When adding and subtracting measured quantities, the number of decimal places in the answer is determined by
a. the greatest number of decimal places in the measurments
b. the least number of decimal places in the measurements
c. the greatest number of significant figures in the measurement
d. the least of significant figures in the measurement

The average kinetic energy of particles of a substance is:
a. not effected by the temperature of the substance
b. raised as the temperature of the substance is lowered
c. proportional to the temperature of the substance
d. equal to 0

The volume of a gas is increased from 0.5 L to 4.0 L while the temperature is held constant. The pressure of the gas:
a. increases by a factor of four
b. increases by a factor of eight
c. decreases by a factor of eight
d. increases by a factor of two

At 80 K, the particles have:
a. twice the average kinetic energy of the same particles at 40 K
b. half the average kinetic energy of the same particles at 40 K
c. one-fourth the average kinetic energy of the same particles at 20K
d. none of these

Mixtures from which some of the particles will settle are
a. colloids
b. solutions
c. emulsions
d. suspensions

When multiplying and dividing measured quantities, the number of significant figures in the answer is determined by
a. the greatest number of decimal places in the measurements
b. the least