Mole and Gases Practice Questions PDF

1. At 273K and 1 atm, what volume does 1 mole of *any* gas occupy? * (A) 22.4 dm³ * (B) 24.5 dm³ * (C) 22.4 cm³ * (D) 24.0 dm³ 2. At 298K and 1 atm, what volume does 1 mole of *any* gas occupy? * (A) 22.4 dm³ * (B) 24.5 dm³ * (C) 24.0 cm³ * (D) 29.8 dm³ 3. What is the equation that should be used...

1. At 273K and 1 atm, what volume does 1 mole of *any* gas occupy? * (A) 22.4 dm³ * (B) 24.5 dm³ * (C) 22.4 cm³ * (D) 24.0 dm³ 2. At 298K and 1 atm, what volume does 1 mole of *any* gas occupy? * (A) 22.4 dm³ * (B) 24.5 dm³ * (C) 24.0 cm³ * (D) 29.8 dm³ 3. What is the equation that should be used to nd the volume of a gas at 298K and 1atm? * (A) V = 24.5 x n * (B) V = 24.5 / n * (C) V = 22.4 x n *(D) pV = nRT 4. What is the ideal gas equation? * (A) pV = nRT * (B) p = nRTV * (C) V = p/nRT * (D) n = pVRT 5. In the ideal gas equation, what are the standard units for pressure (p)? * (A) atm * (B) kPa * (C) Pa * (D) mmHg 6. In the ideal gas equation, what are the standard units for volume (V)? * (A) cm³ * (B) dm³ * (C) m³ * (D) litres 7. In the ideal gas equation, what are the units for temperature (T)? * (A) °C fi  * (B) K *(C) °F *(D) J 8. What is the value of the molar gas constant (R)? * (A) 8.31 J.K-1.mol-1 * (B) 0.0821 atm.dm3.K-1.mol-1 * (C) 6.022 x 1023 mol-1 * (D) 24.5 dm3.mol-1 9. To convert from °C to K, you should: * (A) Add 273 * (B) Subtract 273 * (C) Multiply by 273 * (D) Divide by 273 10. To convert from cm3 to m3, you should: * (A) Multiply by 10-2 * (B) Multiply by 10-3 *(C) Multiply by 10-6 * (D) Multiply by 10-9 11. To convert from dm3 to m3, you should: * (A) Multiply by 10-2 *(B) Multiply by 10-3 *(C) Multiply by 10-6 * (D) Multiply by 10-9 12. To convert from kPa to Pa, you should: * (A) Multiply by 1000 *(B) Divide by 1000 * (C) Multiply by 10-6 *(D) Multiply by 101 13. Which of the following is the correct rearrangement of pV=nRT to nd T? * (A) T = pV/nR * (B) T = nR/pV * (C) T = pVnR * (D) T= pRnV fi  14. What volume is occupied by 2 moles of a gas at 298 K and 1 atm? * (A) 12.25 dm³ * (B) 24.5 dm³ * (C) 49.0 dm³ * (D) 73.5 dm³ 15. How many moles are in 44.8dm3 of gas at 273K and 1 atm? * (A) 0.5 mol *(B) 1.0 mol * (C) 2.0 mol *(D) 4.0 mol 16. You should use the Ideal Gas Equation when... * (A) You are given the temperature and pressure as 273K and 1 atm. * (B) You are given the temperature and pressure as 298K and 1 atm. * (C) You are given any other temperature and pressure * (D) Never, it does not exist. 17. What does "stoichiometry" mean? * (A) Calculating the Mr of compounds. * (B) Using the relative ratios of reactants and products in an equation to nd the number moles of a substance. * (C) Calculating the number of moles of gases. *(D) Calculating atom economy. 18. For the following reaction, how many moles of H2 are produced from 2 moles of Mg? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) * (A) 0.5 * (B) 1 *(C) 2 * (D) 4 19. For the following reaction, how many moles of HCl are needed to react with 0.5 moles of Mg? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) * (A) 0.5 * (B) 1 * (C) 2 fi *(D) 4 20. A gas occupies a volume of 100 cm³ at a pressure of 100 kPa and a temperature of 27 °C. What is the number of moles of gas? (R = 8.31 J.K-1.mol-1) * (A) 0.004 mol * (B) 0.04 mol * (C) 0.4 mol * (D) 4 mol