Unit 6-Review The Mole

Front

What is the number of moles in 22 grams of carbon dioxide (CO₂)? (Molar mass of CO₂ = 44 g/mol)

Back

0.5 moles

Front

Which is not an empirical formula?

Back

C₂H₄

Front

What is an empirical formula?

Back

It is the simplest whole-number ratio of moles of elements in the compound.

Front

Find the molar mass of CaCO₃.

Back

100 g

Front

Which one is an empirical formula (cannot be simplified further)?

Back

CaCl₂

Front

Define molar mass.

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the empirical formula of glucose (C₆H₁₂O₆)?

Back

CH₂O.

Front

What is the significance of the mole in chemistry?

Back

The mole is a unit that measures the amount of substance, allowing chemists to count particles by weighing them.

Front

What is the difference between empirical and molecular formulas?

Back

Empirical formula shows the simplest ratio of elements, while molecular formula shows the actual number of atoms in a molecule.