CHE 022 - GENERAL CHEMISTRY P3 LABORATORY EXAMINATION

1. According to Charles's law, what happens to the volume of a gas if its temperature is doubled while the pressure remains constant?

• Volume doubles
• Volume halves
• Volume quadruples
• Volume remains the same

The following are characteristics of an ideal gas, EXCEPT:

• The particles in the gas are extremely small, so the gas does not occupy any spaces
• The ideal gas has constant, random and straight-line motion.
• There are forces between the particles of the gas.
• Particles only collide elastically with each other and with the walls of container.

In the equation PV=nRT, what does n refers to?

• the absolute pressure of the gas
• the gas constant
• the volume of ideal gas
• the amount of gas

Which of the following is NOT a gas variable relevant to the ideal gas equation

• weight
• pressure
• temperature
• volume

Which of the following statement is NOT true about real gas?

• Real gas has real volume, and the collision of the particles is not elastic.
• All real gases tend to perform ideal gas behavior at low pressure and relatively high temperature
• The volume of real gas is much lower than of the ideal gas.
• The pressure of real gas is lower than of ideal gas.

Which of the following is the ideal gas equation?

• P+V=NRT
• PV=n+R+T
• PV=2nRT
• PV=nRT

It is the concentration of a solution expressed in moles of solute per Liter of solution.

• Molarity
• Molality
• Molar mass
• Dilutions

It is defined as the number of moles of solute in a kilogram of solvent

• Molarity
• Molality
• Molar mass
• Dilutions

What is a solvent?

• The substance that does the dissolving in a solution
• The mixing of different substances
• The process in which neutral molecules lose or gain electrons
• The process in which neutral molecules lose or gain electrons.

What do molarity and molality have in common?

• Both have "kg solvent" in the denominator
• Both have "moles solute" in the numerator
• Both have "L solution" in the denominator
• Both have "moles solution" in the denominator