امتحان الكتروني ميد كيمياء 1

20 Questions | Total Attempts: 53

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نحن فريق huc academy نقدم لكم امتحان الكتروني كيمياء 1 بالتوفيق للجميع يا رب ❤


Questions and Answers
  • 1. 
    Convert 2.5 kg/m 3  to d/cm 3 
    • A. 

      2.5 *10^3

    • B. 

       2.5 *10 ^3-

    • C. 

      2.5 *  10^6

    • D. 

      2.5

  • 2. 
    How many S. F in 0.0200
    • A. 

      5 S.F

    • B. 

      4 S.F

    • C. 

      2 S.F

    • D. 

      3 S.F

  • 3. 
    What is the charge Fe in FeO
    • A. 

      +2

    • B. 

      +1

    • C. 

      +3

    • D. 

      _2

  • 4. 
    What is the name of FeO 
    • A. 

      Iron (III) oxide

    • B. 

      Iron (II) oxide

    • C. 

      Iron ( lll) oxygen 

    • D. 

      Iron ( ll) oxygen 

  • 5. 
       How many number of elctron in Na+2 if atomic number =23
    • A. 

      23 e 

    • B. 

      25 e 

    • C. 

      20 e 

    • D. 

      21 e 

  • 6. 
    What is the type chemichal reactant in  HCl. +NaOH - - - - - - - - >H2O+NaCl
    • A. 

      Douple dicplacment ractant 

    • B. 

      Neutralaization ractant 

    • C. 

      Perticipation ractant 

    • D. 

      Combusition ractant 

  • 7. 
    What is the formoula for sodum sulfates 
    • A. 

      Na2SO4

    • B. 

      Na2SO3

    • C. 

       NaNO3

    • D. 

       NaNO2

  • 8. 
    When 0.86 g of an organic compuond contaning C, H and O was burned completly in pxygen 1.64 g of CO2 and 1.01 g of H2O were preduced if the melecular mass of the compuond is 138 amu determine the melecular formoula 
    • A. 

      C8H24O4

    • B. 

       C2H6O

    • C. 

      C4H12O2

    • D. 

      C2H3O2 

  • 9. 
    Calculate the mass of CO2 preduced from the completly Combusition of 2.5 g C2H5 with excces oxygen : C2H6+O2----------------->CO2+H2O
    • A. 

      2.62

    • B. 

      13.2

    • C. 

      7.33

    • D. 

      10.3

  • 10. 
    When 20 g C2H6 and 120 g O2 react to form CO2 and H2O how many grams of CO2 will be formed 
    • A. 

      18g

    • B. 

      36g

    • C. 

      59g

    • D. 

      87 g 

  • 11. 
    A sample of 1.2 g of carbon was allwed to react with 1.6 g of oxygen if 1.65 g of CO2 preduced the precentge yeild of CO2 is
    • A. 

       54.4%

    • B. 

      32.6%

    • C. 

      41.4%

    • D. 

      75%

  • 12. 
    Hydro carbon contain 0.12g of carbon and 0.02g of h the melecular weight the compount is 0.28 g/mol what is the melecular formoula 
    • A. 

      CH2

    • B. 

      C2H4

    • C. 

      C3H6

    • D. 

      C2H6

  • 13. 
    The 40 ml of 2 M H2SO4 are titrated react whith 50 ml of NaOH as unbalanced what is the molar concetration for NaOH solution  H2SO4+NaOH--------------->Na2SO4+H2O
    • A. 

      4.2M

    • B. 

      8.4M

    • C. 

      6.4M

    • D. 

      3.2M

  • 14. 
    Calculate the new concetration if we add 20ml of water to 40ml of 2M H2SO4
    • A. 

       1.3M

    • B. 

       130M

    • C. 

       0.66M

    • D. 

       3.1M

  • 15. 
    What is the name of HBr
    • A. 

      Hydro brom acid 

    • B. 

      Hydro brom bace 

    • C. 

       Hydro bromic acid 

    • D. 

      Hydro bromic bace

  • 16. 
    The pressure of gas mussured as 49 torr represint this pressure in both atm
    • A. 

       6.4 *10^-2

    • B. 

       6.4*10^-3

    • C. 

      6.4*10^-1

    • D. 

       6.4*10^-6

  • 17. 
    A sample of gas at 15 c and 1 atm has avolum 2.58 l what is volum will this gas accopy at 38 c and 1 atm 
    • A. 

      2.79l

    • B. 

      27.9l

    • C. 

      6.3l

    • D. 

      0.36l

  • 18. 
    A sample of methane gas that has volume of 3.8 l at 5 c is heated to 86 c at constant pressure calculate it is new volume 
    • A. 

      6.2l

    • B. 

      4.2

    • C. 

       4.9l

    • D. 

       4.5l

  • 19. 
    A sample containing 0.35 mil argon gas at tempreture 13 c and A pressure of 568 torr is heated to 56 c and pressure of 897 torr calculate the change in volume that occurce
    • A. 

      3l

    • B. 

      3l-

    • C. 

      1.5l

    • D. 

      1.5l-

  • 20. 
    The molar volume of agas is litters at 300 c and 15 atm is
    • A. 

      3.1k

    • B. 

      3.2l 

    • C. 

      6.2l

    • D. 

      5.1l

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