How many molecules are present in a 90.1 g sample of glucose ($\text{C}_6\text{H}_{12}\text{O}_6$)? (Molar mass of glucose = 180.2 g/mol; Avogadro's number, $N_{\text{A}} = 6.022 \times 10^{23}\text{ mol}^{-1}$)

A) $3.011 \times 10^{23}$ molecules

B) $6.022 \times 10^{23}$ molecules

C) $1.204 \times 10^{24}$ molecules

D) $7.226 \times 10^{24}$ molecules

How many total atoms are present in a 0.250 mol sample of methane gas ($\text{CH}_4$)?

A) $1.51 \times 10^{23}$ atoms

B) $7.53 \times 10^{23}$ atoms

C) $6.02 \times 10^{23}$ atoms

D) $3.01 \times 10^{24}$ atoms

A) $1.08 \times 10^{25}\text{ g}$

B) $2.99 \times 10^{-23}\text{ g}$

C) $3.34 \times 10^{22}\text{ g}$

D) $5.55 \times 10^{-2}\text{ g}$

Chemistry · The Mole & Stoichiometry · Chemistry · The Mole

4 Chemistry practice questions on Avogadro's number. Questions that assess core concepts and understanding.