Senior Science 3

 The Ideal Gas Law is an equation that relates the pressure, volume, temperature, and the number of moles of a gas. Which of the following is the correct formula for the Ideal Gas Law?

• PV = nRT

• P/T = nR

• P = k * V

• V = k * n

In the Ideal Gas Law, the constant "R" is the:

• Ideal gas constant

• Gas density constant

• Universal constant

• Ratio of pressure to volume

According to the Ideal Gas Law, what happens to the volume of a gas if the pressure is increased while keeping temperature and the number of moles constant?

• The volume increases

• The volume decreases

• The volume remains constant

• The volume becomes zero

Dalton's Law of Partial Pressures states that the total pressure of a gas mixture is the sum of the partial pressures of the individual gases. Which of the following is the equation that represents Dalton’s Law?

• P₁ + P₂ + P₃ = P total

• P total = nRT

• P = k * V

• P/V = nRT

If you have a mixture of three gases with partial pressures of 2 atm, 3 atm, and 4 atm, what is the total pressure of the gas mixture according to Dalton's Law?

• 3 atm

• 5 atm

• 9 atm

• 10 atm

According to the Ideal Gas Law, the pressure of a gas is directly proportional to:

• the number of moles

• the temperature

• the volume

• both a and b

Which of the following conditions must be true for a gas to behave ideally?

• High pressure and low temperature

• Low pressure and high temperature

• High temperature and low volume

• Low pressure and low temperature

Dalton’s Law is useful in determining the partial pressure of a gas in a mixture. What is a partial pressure?

• The total pressure of the gas mixture

• The pressure exerted by a specific gas in the mixture

• The sum of the pressures of all gases

• The pressure of gas when isolated

If the volume of a gas is doubled and the temperature remains constant, what happens to the pressure according to Boyle's Law and the Ideal Gas Law?

• The pressure doubles

• The pressure decreases by half

• The pressure remains constant

• The pressure is reduced to one-fourth

Dalton’s Law of Partial Pressures is particularly useful for calculating the pressure of gases in mixtures, such as:

• Air in a balloon

• A no gas sample

• A solid at high pressure

• A gas in a vacuum