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

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| By WlHKIED
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WlHKIED
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Quizzes Created: 2 | Total Attempts: 1,219
| Attempts: 846
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  • 1/5 Questions

    Calculate the number of moles in 8.00 g of sodium hydroxide, NaOH.

    • 0.05
    • 0.10
    • 0.15
    • 0.20
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Online Assignment 1.1: The Mole Concept And Avogadro
About This Quiz

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.

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  • 2. 

    Which sample contains the smallest amount of oxygen?

    • 0.3 mol 

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

    • 0.6 mol 

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

    • 0.7 mol HCOOH

    • 0.8 mol 

      Online Assignment 1.1: The Mole Concept And Avogadro's Constant - Quiz
    Correct Answer
    A. 0.8 mol 
    Explanation
    1 mol of  gives 4 mol of O => 0.3 mol of  gives 1.2 mol of O


    1 mol of  gives 3 mol of O => 0.6 mol of  gives 1.8 mol of O


    1 mol of HCOOH gives 2 mol of O => 0.7 mol of HCOOH gives 1.4 mol of O



    1 mol of  gives 1 mol of O => 0.8 mol of  gives 0.8 mol of O

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  • 3. 
    What is the mass, (in grams), of  molecules of ? - ProProfs

    What is the mass, (in grams), of  molecules of ?

    • 62

    • 124

    • 248

    • 496

    Correct Answer
    A. 248
    Explanation
    amount of  =  = 2 mol
    mass of  = 2 x (31 x 4) = 248 g

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  • 4. 
    Calculate the number of nitrate ions in 2.00 mol of magnesium nitrate, . - ProProfs

    Calculate the number of nitrate ions in 2.00 mol of magnesium nitrate, .

    Correct Answer
    A.
    Explanation
    1 mol of  gives 2 mol of nitrate ions => 2 mol of  gives 4 mol of nitrate ions.
    number of nitrate ions = 

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  • 5. 
    How many hydrogen atoms are contained in one mole of ethanol, ? - ProProfs

    How many hydrogen atoms are contained in one mole of ethanol, ?

    Correct Answer
    A.
    Explanation
    1 mol of  gives 6 mol of H
    no. of H atoms = 

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  • Mar 21, 2023
    Quiz Edited by
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  • Nov 18, 2011
    Quiz Created by
    WlHKIED
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