Exploring Gas Laws Test

1.  Dalton’s law of partial pressure states that the total pressure of ____________________ gases is equal to the ____________________ of the partial pressure of the individual gases.

2.  At STP, 1 mol of an ideal gas would occupy approximately the same volume as ____________________ empty 2-L pop bottles.

3.  What gas laws are combined to derive the ideal gas law?

4.  Which of the following represents Avogadro’s law?

I.      n₁/V₁=  n /V₂

II.     n₁/V₂=  n₂/V₁

III.    m₁/V₁=  m₂/V₂

IV.    T₁/V₁=  T₂/V₂

V.     V₁/n₁ = V₂/n₂

5.  Which of the following conditions represent STP?

6. According to Avogadro’s law and the Law of Combining Volumes, 2 mol of hydrogen chloride are related to how many volume units of hydrogen chloride in this chemical reaction?

H_2(g)  +  Cl_2(g) →  2HCl_(g)

7.  In the ideal gas law equation, the valus of R, the ideal gas constant, and its units is

8.  Ozone traps UV radiation from the soon.   In which layer of the atmosphere is ozone concentration the highest?

9.  Which is the most abundant gas in the Earth’s atmosphere?

10.  Which of the following is NOT a greenhouse gas (GHG) in the atmosphere?

11.   An AQHI value of 4 indicates a {__________} health risk

12.  The Ideal Gas Law equation is PV = nRT.  Which equation below correctly solves for mass (m) of a confined gas using this equation?

I.    m = PV / RT

II.   m = RT / PVM

III.  m = RM / PVT

IV.  m = PVM / RT

V.   m = DRT / P

13.  What volume of pure oxygen gas, O₂, measured at 546 K and 101.325 kPa is formed by the complete decomposition of 0.200 mol Ag₂O according to the following equation:

2Ag₂O → 4Ag  +  O₂

14.  How many moles of KClO₃ are needed to form 2.8 L of O₂, measured at STP, according to the following reaction: 

2KClO₃ →  2KCl  +  3O₂

15.  Hydrogen gas was collected in a gas-collecting bottle with a volume of 30.0 mL by water displacement on a day where the temperature was 24ºC and the barometric pressure was 98.125 kPa. The vapour pressure of water at 24ºC is 2.99 kPa. What would be the volume of hydrogen gas at STP (new conditions) if it was dry?

16.  The synthesis os ammonia (Haber Process) is represented by the chemical equation:

N_2(g)  +  3H_2(g) →  2NH_3(g)

What volume of hydrogen gas will produce 1.2 x 10³ L of ammonia?

17.  What volume will be occupy by 8.00 g of helium gas at STP?

18. Three identical 1-L flasks filled with H₂, O₂, and Ne gas, respectively, at STP are placed in front of you. Determine which of the following statements is true.

19.  Warming in the Stratosphere is mainly caused by

20. “The number of molecules contained in 50 mL of CO (carbon monoxide) gas equals the number of molecules in 50 mL of F₂ (fluorine gas) at STP.” This statement illustrates which of the following laws or theories?

21. A rigid container contains 2.50 mol O₂, 0.50 mol N₂, and 1.00 mol CO₂. The total pressure (P_T) of the system is 200 kPa. What is the partial pressure exerted by the O₂ in the mixture?

22.  What is the density of Argon gas at SATP?

23.  State Avogadro’s law

Match each of the names of the following scientist (sort element) with their correct contribution (statement)

25.  What is the molar mass of a gas if a 5.00 g sample of the gas has a pressure of 120 kPa and a volume of 750 mL, at a temperature of 35.0 ºC? (6 marks)

(mark breakdown:  list given (1 mark), plan (2 marks) , solution (with correct units, cancellation of units and significant digits, 3 marks) 

26.  People have the responsibility to protect the integrity of the Earth’s atmosphere. There are many ways that individuals can reduce the amount of carbon dioxide and green house gases (GHGs) that can cause global warming.

a. Identify three actions that you, personally, could take to achieve this goal.  (3 marks)

b. explain how such actions could achieve the goal of reducing GHGs in the atmosphere. (3 marks)