Intermolecular Forces and Gas Laws

Front

What is molarity?

Back

Molarity is a measure of concentration defined as the number of moles of solute per liter of solution (mol/L).

Front

How do you calculate moles from molarity and volume?

Back

Moles = Molarity (mol/L) × Volume (L).

Front

What is the molar mass of cobalt(II) nitrate, Co(NO3)2?

Back

The molar mass of Co(NO3)2 is approximately 182.9 g/mol.

Front

How many moles are in 8.40 grams of cobalt(II) nitrate, Co(NO3)2?

Back

0.0459 moles.

Front

What is the formula to calculate the number of moles from grams?

Back

Moles = Mass (g) / Molar Mass (g/mol).

Front

How many moles are in 25.0 grams of potassium sulfide (K2S)?

Back

0.23 moles.

Front

What does Kinetic Molecular Theory state about gas particles?

Back

Kinetic Molecular Theory states that gas particles are in constant motion and that they collide elastically, meaning there is transfer but no loss of energy.

Front

What is the relationship between pressure and volume in gases?

Back

According to Boyle's Law, pressure and volume are inversely related at constant temperature (P1V1 = P2V2).

Front

What is the ideal gas law equation?

Back

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

Front

What is the significance of the ideal gas constant (R)?

Back

The ideal gas constant (R) is used in the ideal gas law and has a value of 0.0821 L·atm/(K·mol) or 8.314 J/(K·mol).