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Lecture 3 : Dalton’s Atomic Theory ; Atomic and Molecular Masses ; Mole concept and molar masses and percentage composition ; Stochiometry and stoichiometric calculation

  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 1

    What is the difference between molality and molarity?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 2

    What is the symbol for SI unit of mole? How is the mole defined?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 3

    What will be the mass of one atom of C-12 in grams?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 4

    What volume of 10M HCl and 3M HCl should be mixed to obtain 1L of
    6M HCl solution?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 5

    4 litres of water are added to 2L of 6 molar HCl solutions.
    What is the molarity of resulting solution?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 6

    What is 1molal solution?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 7

    Write an expression for molarity and molality of a solution.

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 8

    How much potassium chlorate should be heated to produce 2.24L of
    oxygen at NTP?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 9

    What is stoichiometry?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 10

    1L of a gas at STP weighs 1.97g. What is molecular mass?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 11

    Calculate the number of molecules present in 0.5 moles of CO2?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 12

    At NTP, what will be the volume of molecules of 6.022 ´1023 H2?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 13

    What is the value of one mole?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 14

    What is formula mass?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 15

    Define one atomic mass unit (amu).

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 16

    Write Postulates of Dalton’s atomic theory.

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 17

    What is the difference between mass & weight? How is mass measured in
    laboratory?

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 18

    Write seven fundamental quantities & their units.

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 19

     

    Determine the molecular formula of an oxide of iron in which the mass per cent of iron and oxygen are 69.9 and 30.1 respectively. Given that the molar mass of the oxide is 159.69 g mol-1

     

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 20

    How much copper can be obtained from 100 g of copper sulphate (CuSO4)?

     

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 21

    Calculate the concentration of nitric acid in moles per litre in a sample which has a density, 1.41 g mL-1 and the mass per cent of nitric acid in it being 69%.

     

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 22


    Calculate the mass of sodium acetate (CH3COONa) required to make 500 mL of 0.375 molar aqueous solution. Molar mass of sodium acetate is 82.0245 g mol-1

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  • Chapter 1 - Some Basic Concepts of Chemistry Assignments 23

    Calculate the amount of carbon dioxide that could be produced when

    (i) 1 mole of carbon is burnt in air.

    (ii) 1 mole of carbon is burnt in 16 g of dioxygen.

    (iii) 2 moles of carbon are burnt in 16 g of dioxygen.

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    • Description:-

    Lecture 3 :
    Today, we will discuss the last four topics of this chapter, i.e; Dalton’s Atomic Theory ; Atomic and Molecular Masses ; Mole concept and molar masses and percentage composition ; Stochiometry and stoichiometric calculationChapter 1 - Some Basic Concepts of Chemistry
    OBJECTIVES:
    1:  Concepts about Chemical reactions ; Dalton’s Atomic Theory ; Atomic and Molecular Masses ; Mole concept and molar masses and percentage composition ; Stochiometry and stoichiometric calculation
    2: Try to solve the numerical problem on these topics i.e; Dalton’s Atomic Theory ; Atomic and Molecular Masses ; Mole concept and molar masses and percentage composition ; Stochiometry and stoichiometric calculation
    Important Tip:
     This lecture about Some Basic Concepts of Chemistry is base for the further chapters. These topics help in many ways as to understand the and how we can use them. It help you in further studies also.
    Please go through the topic, their notes. Properly do the assignments, watch videos of the concerned topics. If you any doubt about any topic/point please submit it in the discussion section... it will be answered as soon as possible.
    After all of this... when you fell confident about the particular topic/chapter then take the quiz.

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