REVIEW- Unit 3 Learning Checkpoint 1

Front

What is the molar mass of cholesterol?

Back

The molar mass of cholesterol is 386 g/mol.

Front

How do you calculate the mass of a substance from the number of molecules?

Back

To calculate the mass, use the formula: mass = (number of molecules / Avogadro's number) * molar mass.

Front

What is the ideal gas law equation?

Back

The ideal gas law is represented by the equation PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature in Kelvin.

Front

What is the significance of Avogadro's number in chemistry?

Back

Avogadro's number (6.022 x 10^23) is the number of particles (atoms, molecules, etc.) in one mole of a substance.

Front

How do you determine the identity of a gas based on its mass and volume?

Back

You can determine the identity of a gas by calculating the number of moles using the ideal gas law and comparing the mass to known molar masses.

Front

What is the relationship between pressure and volume in gases?

Back

According to Boyle's Law, pressure and volume are inversely related when temperature and the number of moles are constant.

Front

What is the formula to find the total pressure of a gas in a container?

Back

Total pressure can be found using the ideal gas law: P = (nRT) / V.

Front

What does it mean for a gas to be in a rigid container?

Back

A rigid container means that the volume cannot change, which affects how pressure and temperature relate to the number of moles of gas.

Front

How do you convert Celsius to Kelvin?

Back

To convert Celsius to Kelvin, add 273.15 to the Celsius temperature.

Front

What is the significance of temperature in the ideal gas law?

Back

Temperature affects the kinetic energy of gas particles, influencing pressure and volume in the ideal gas law.