Online Assignment 1.1: The Mole Concept And Avogadro's Constant

5 Questions | Total Attempts: 774

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Online Assignment 1.1: The Mole Concept And Avogadro

This assignment consists of 5 questions. Each questions offers 4 suggested answers The maximum mark for this paper is 5. Answer ALL the questions. For each question, choose the answer you consider to be the best. You can use the Periodic Table at the back of your book.


Questions and Answers
  • 1. 
    Which sample contains the smallest amount of oxygen?
    • A. 

      0.3 mol 

    • B. 

      0.6 mol 

    • C. 

      0.7 mol HCOOH

    • D. 

      0.8 mol 

  • 2. 
    How many hydrogen atoms are contained in one mole of ethanol, ?
    • A. 

      5

    • B. 

      6

    • C. 
    • D. 
  • 3. 
    Calculate the number of moles in 8.00 g of sodium hydroxide, NaOH.
    • A. 

      0.05

    • B. 

      0.10

    • C. 

      0.15

    • D. 

      0.20

  • 4. 
    What is the mass, (in grams), of  molecules of ?
    • A. 

      62

    • B. 

      124

    • C. 

      248

    • D. 

      496

  • 5. 
    Calculate the number of nitrate ions in 2.00 mol of magnesium nitrate, .
    • A. 
    • B. 
    • C. 
    • D. 
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