The sum of the partial pressures of a gas mixture equals the total gas pressure of the system. This ...

The sum of the partial pressures of a gas mixture equals the total gas pressure of the system. This statement represents which of the following laws?
 
  a. Dalton's law
  b. Avogadro's law
  c. The combined-gas law
  d. Boltzmann's Universal Gas Constant

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Q. 2  In the combined-gas law, n represents:
 
  a. Boltzmann's uni-versal gas constant. c. the number of moles of gas.
  b. the atomic mass of the gas. d. the partial pressure of a gas.

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Q. 3  The partial pressure of a gas can be obtained by doing which of the following?
 
  a. Multiplying the total mixture pressure by the percentage area a particular gas occu-pies
  b. Multiplying the atmospheric pressure by the percentage of water vapor present
  c. Subtracting the partial pressure of water vapor from the atmospheric pressure
  d. Dividing the total pressure of a gas mix-ture by the atmospheric pressure

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Q. 4  The combined-gas law best describes which of the following?
 
  a. The behavior of all gases when volume is constant
  b. The combined behavior of pressure, vol-ume, and temperature
  c. The additive properties of individual gases occupying the same space
  d. The macroscopic behavior of gases when any or all variables change simultaneously