How many total atoms are contained in a 5.60 L sample of methane gas ($\text{CH}_4$) measured at standard temperature and pressure (STP)? (Molar volume at STP = 22.4 L/mol; Avogadro's number = $6.02 \times 10^{23}\text{ particles/mol}$)

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

B) $3.01 \times 10^{23}$ atoms

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

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

Mole conversions (mass, particles, gas volume at STP) Knowledge-Based Download PDF

Chemistry · The Mole & Stoichiometry · Chemistry · The Mole

5 Chemistry practice questions on Mole conversions (mass, particles, gas volume at STP). Questions that assess core concepts and understanding.

1.
What is the mass, in grams, of a sample containing $1.204 \times 10^{24}$ molecules of sulfur trioxide ( $\text{SO}_3$ )? (Molar mass of $\text{SO}_3 = 80.0\text{ g/mol}$ ; Avogadro's number = $6.02 \times 10^{23}\text{ molecules/mol}$ )
- A) 40.0 g
- B) 80.0 g
- C) 160 g
- D) 320 g
2.
What is the mass of a 5.60 L sample of carbon monoxide gas (CO) measured at standard temperature and pressure (STP)? (Molar mass of CO = 28.0 g/mol; molar volume of an ideal gas at STP = 22.4 L/mol)
- A) 1.25 g
- B) 3.50 g
- C) 7.00 g
- D) 112 g
3.
What volume does a sample containing $9.03 \times 10^{23}$ molecules of nitrogen gas ( $\text{N}_2$ ) occupy at standard temperature and pressure (STP)? (Avogadro's number = $6.02 \times 10^{23}\text{ molecules/mol}$ ; molar volume of an ideal gas at STP = $22.4\text{ L/mol}$ )
- A) 14.9 L
- B) 22.4 L
- C) 33.6 L
- D) 67.2 L
4.
How many total atoms are contained in a 5.60 L sample of methane gas ( $\text{CH}_4$ ) measured at standard temperature and pressure (STP)? (Molar volume at STP = 22.4 L/mol; Avogadro's number = $6.02 \times 10^{23}\text{ particles/mol}$ )
- A) $1.51 \times 10^{23}$ atoms
- B) $3.01 \times 10^{23}$ atoms
- C) $7.53 \times 10^{23}$ atoms
- D) $3.01 \times 10^{24}$ atoms
5.
What volume does a 66.0 g sample of carbon dioxide gas (CO2) occupy at standard temperature and pressure (STP)? (Molar mass of CO2 = 44.0 g/mol; molar volume of an ideal gas at STP = 22.4 L/mol)
- A) 14.9 L
- B) 22.4 L
- C) 44.8 L
- D) 33.6 L