Challenge 8.3 - One Step Mole Conversions

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| By Cbrammell
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Cbrammell
Community Contributor
Quizzes Created: 1 | Total Attempts: 325
Questions: 8 | Attempts: 325

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Questions and Answers
  • 1. 

    What is the mass of 4.65 moles of oxygen gas? (O2)

    • A.

      149 g of O2

    • B.

      4.65 g of O2

    • C.

      0.145 g of O2

    • D.

      0.15 g of O2

    Correct Answer
    A. 149 g of O2
    Explanation
    option 1 is right
    option 2 is wrong because you did not covert
    option 3 is wrong because you flipped your conversion factor
    option 4 is wrong because you flipped your conversion factor and have the wrong answer according to sig figs

    Rate this question:

  • 2. 

    How many moles of carbon dioxide are in 22.5 grams of CO2? 

    • A.

      990 moles of CO2

    • B.

      22.5 moles of CO2

    • C.

      0.511 moles of CO2

    • D.

      44.01 moles of CO2

    Correct Answer
    C. 0.511 moles of CO2
    Explanation
    option 1 is wrong because you flipped your conversion factor
    option 2 is wrong because you did not convert
    option 3 is correct
    option 4 is wrong because that is the molar mass of CO2

    Rate this question:

  • 3. 

    How many moles of carbon tetrafluoride are in 176 grams of CF4?

    • A.

      88.01 moles of CF4

    • B.

      176 moles CF4

    • C.

      15500 moles of CF4

    • D.

      2.00 moles of CF4

    Correct Answer
    D. 2.00 moles of CF4
    Explanation
    option 1 is wrong because that is the molar mass of CF4
    option 2 is wrong because you did not covert
    option 3 is wrong because you flipped your conversion factor
    option 4 is right

    Rate this question:

  • 4. 

    A chemists needs 3.52 moles of aluminum oxide, Al2O3, for a particular experiment. How many grams of Al2O3 should she weight out?

    • A.

      359 g of Al2O3

    • B.

      0.0345 g of Al2O3

    • C.

      102 g of Al2O3

    • D.

      3.52 g of Al2O3

    Correct Answer
    A. 359 g of Al2O3
    Explanation
    option 1 is right
    option 2 is wrong because you flipped your conversion factor
    option 3 is wrong because it is the molar mass of Al2O3
    option 4 is wrong because you did not convert

    Rate this question:

  • 5. 

    How many atoms are in 7.86 moles of sodium chloride?

    • A.

      459 atoms of NaCl

    • B.

      4.73 x10^24 atoms of NaCl

    • C.

      1.31 x 10^-23 atoms of NaCl

    • D.

      6.02 x10^23 atoms of NaCl

    Correct Answer
    B. 4.73 x10^24 atoms of NaCl
    Explanation
    option 1 is wrong because you did not use the right conversion factor
    option 2 is right
    option 3 is wrong because you flipped your conversion factor
    option 4 is wrong because it is avogadro's number only

    Rate this question:

  • 6. 

    A chemist has 5.69 x 10^26 molecules of strontium chloride. How many moles of strontium chloride do they have?

    • A.

      158.52 moles of strontium chloride

    • B.

      6.02 x 10^23 moles of strontium chloride

    • C.

      3.43 x 10^50 moles of strontium chloride

    • D.

      945 moles of strontium chloride

    Correct Answer
    D. 945 moles of strontium chloride
    Explanation
    Option 1 is wrong because that is the molar mass of SrCl2
    option 2 is wrong because that is avogadros number
    option 3 is wrong because you flipped your conversion factor
    option 4 is right

    Rate this question:

  • 7. 

    How many liters of carbon dioxide are in 63.5 moles of CO2?

    • A.

      1.44 L CO2

    • B.

      1420 L CO2

    • C.

      3.93 x 10^25 L CO2

    • D.

      2490 L CO2

    Correct Answer
    B. 1420 L CO2
    Explanation
    option 1 is wrong because you flipped your conversion factor
    option 2 is right
    option 3 is wrong because you used avogadros number
    option 4 is wrong because you used the molar mass of CO2

    Rate this question:

  • 8. 

    How many moles of liquid dihydrogen monoxide are there when you have 253 L of dihydrogen monoxide?

    • A.

      11.3 moles of H2O

    • B.

      5670 moles of H2O

    • C.

      4.20 x 10^-22 moles of H2O

    • D.

      14.0 moles of H2O

    Correct Answer
    A. 11.3 moles of H2O
    Explanation
    option 1 is right
    option 2 is wrong because you flipped your conversion factor
    option 3 is wrong because you use avogadros number
    option 4 is wrong because you use molar mass

    Rate this question:

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 24, 2016
    Quiz Created by
    Cbrammell
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