Unit 3 Review

Front

What is the mole used for?

Back

To measure the amount of atoms or molecules in a substance.

Front

What percent of the earth's freshwater is available for drinking?

Back

1%.

Front

What is Avogadro's number?

Back

6.02 x 10^23.

Front

What is the molarity of a solution made by adding 1.565 moles of PbNO3 to 500 mL?

Back

3.13 M.

Front

What is the molar mass of fluorine gas, F2?

Back

38 g/mol.

Front

Define molarity.

Back

Molarity is the number of moles of solute per liter of solution.

Front

What is the formula for calculating molarity?

Back

Molarity (M) = moles of solute / liters of solution.

Front

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

Back

It represents the number of atoms, ions, or molecules in one mole of a substance.

Front

How do you convert grams to moles?

Back

Moles = grams / molar mass.

Front

What is the relationship between moles and mass?

Back

The mass of a substance is directly proportional to the number of moles.