Question

How many moles are present in $ 22\, \text{g} $ of carbon dioxide (CO$_2$)? (Molar mass of CO$_2$ = $ 44\, \text{g/mol} $)

• A. 0.25 mol
• B. 0.5 mol
• C. 1 mol
• D. 2 mol

Hint:

Key Fact: Moles = Mass (g) / Molar mass (g/mol)

Answer 1

The Correct Option is B

The calculation for determining the number of moles from a specific mass of a substance is as follows:

\[ \text{Number of moles} = \frac{\text{Mass of substance (g)}}{\text{Molar mass (g/mol)}} \]

For carbon dioxide (CO₂), the values are:

• Mass: 22 g
• Molar mass: 44 g/mol

Applying these values to the formula:

\[ \text{Number of moles of CO}_2 = \frac{22\, \text{g}}{44\, \text{g/mol}} = 0.5\, \text{mol} \]

Consequently, 22 g of carbon dioxide contains 0.5 moles.