What Is The Final Pressure Of The Oxygen In The Drum At 25 C?

24 Questions

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Oxygen Quizzes & Trivia

First exam. abc


Questions and Answers
  • 1. 
    On a space station, a 10.0-L steel drum of oxygen gas at 25 C and 101.3kPa pressure spings a leak and 8.00g of gas escapes before the leak is plugged. What is the final pressure of the oxygen in the drum at 25 C?
    • A. 

      37.1 kPa

    • B. 

      36.8 kPa

    • C. 

      39.4 kPa

    • D. 

      38.2 kPa

  • 2. 
    • A. 

      Zinc

    • B. 

      Copper

    • C. 

      Silver

    • D. 

      Lead

  • 3. 
    • A. 

      Magnesium

    • B. 

      Radium

    • C. 

      Beryllium

    • D. 

      Barium

  • 4. 
    The hardness of margarine formed is dependent on the amount of _________ added.
    • A. 

      Hydrogen

    • B. 

      Salt

    • C. 

      Milk

    • D. 

      Fat

  • 5. 
    • A. 

      Black

    • B. 

      Brown

    • C. 

      White

    • D. 

      Gray

  • 6. 
    The noble gases occupy 1% of the atmosphere of which _______ is argon.
    • A. 

      0.83

    • B. 

      0.88

    • C. 

      0.90

    • D. 

      0.93

  • 7. 
    • A. 

      Boric acid

    • B. 

      Battery acid

    • C. 

      Orange juice

    • D. 

      Vinegar

  • 8. 
    Insoluble salts can be prepared by
    • A. 

      Filtration

    • B. 

      Distilation

    • C. 

      Precipitation

    • D. 

      Evaporation

  • 9. 
    Brass contains how many percent copper?
    • A. 

      80 %

    • B. 

      70 %

    • C. 

      75 %

    • D. 

      65 %

  • 10. 
    All metals below will not react with cold water except:
    • A. 

      Zinc

    • B. 

      Copper

    • C. 

      Calcium

    • D. 

      Iron

  • 11. 
    Calculate the number of atomes in a 3.50 mol of atoms?
    • A. 

      2.11 x 10^24

    • B. 

      4.11 x 10^24

    • C. 

      3.11 x 10^24

    • D. 

      5.11 x 10^24

  • 12. 
    All halogens have how many electrons in the out shell of the atom?
    • A. 

      5

    • B. 

      6

    • C. 

      7

    • D. 

      8

  • 13. 
    • A. 

      Greenish-yellow

    • B. 

      Pale yellow

    • C. 

      Reddish brown

    • D. 

      Purplish black

  • 14. 
    • A. 

      Malleable

    • B. 

      Brittle

    • C. 

      Ductile

    • D. 

      All of the choices

  • 15. 
    • A. 

      0.6 - 1.0 %

    • B. 

      0.2 - 0.6 %

    • C. 

      1.0 -1.5 %

    • D. 

      < 0.2 %

  • 16. 
    • A. 

      Place a moist red litmus paper in the gas

    • B. 

      Pass the gas through limewater

    • C. 

      Place a moist blue litmus paper in the gas

    • D. 

      Insert a glowing splint into the gas

  • 17. 
    Calculate the final volume if a 1.50 L sample of gass at 905 torr and 10 C is changed to 1.000 atm at 100 C
    • A. 

      1.25 L

    • B. 

      2.35 L

    • C. 

      1.75 L

    • D. 

      2.85 L

  • 18. 
    Calculate the number of moles of gas in a sample occupying 245 mL at 409 torr at 38 C
    • A. 

      0.0516 mol

    • B. 

      0.516 mol

    • C. 

      0.00516 mol

    • D. 

      5.16 mol

  • 19. 
    If 2 L of solution contains 4.5 mol of solute, what is the molarity of the solution?
    • A. 

      2.50M

    • B. 

      2.75M

    • C. 

      2.25M

    • D. 

      2.00M

  • 20. 
    Calculate the mass of water required to prepare a 4.00 m aqueous solution of NH3 using 25.0g HN3.
    • A. 

      0.416 kg

    • B. 

      0.322 kg

    • C. 

      0.278 kg

    • D. 

      0.368 kg

  • 21. 
    The reaction of 6.54 g of zinc and 3.20 g of oxygen produces 9.74 g of zinc oxide, the only compound of theses elements. How much zinc oxide would be produced if 6.54 g of zinc and 5.00 g of oxygen were mixed and allowed to react?
    • A. 

      7.12 g

    • B. 

      9.74 g

    • C. 

      6.89 g

    • D. 

      8.12 g

  • 22. 
    If 6.537 g of zinc reacts with exactly 7.0906 g of chlorine to form the only compound of chlorine and zinc, how much zinc will react with 14.18g of chlorine?
    • A. 

      11.06 g

    • B. 

      14.90 g

    • C. 

      13.07 g

    • D. 

      12.89 g

  • 23. 
    A system that changes from a solid state to a liquid state gains energy.
    • A. 

      True

    • B. 

      False

  • 24. 
    • A. 

      Combustion

    • B. 

      Substitution

    • C. 

      Combination

    • D. 

      All above

    • E. 

      None above