84 thoughts on “Hon Chemistry 9-3-19 ID of Unknown Lab

  1. don’t forget masses may be different even if you have the same block color. however, density never changes! PS mrs skinner please keep singing it’s relaxing.

  2. for the grey block my measurements are as follows:
    mass= 95.137 g
    volume= 65.2 cm3
    density= 1.46 g/cm3
    i believe the grey block is epsilon.
    Write down all of your measurements (mass and volume) so that we have evidence to back up our density values

  3. if clear is 1.17 then black has to be the 1.42 because those are the only two that would sink since they’re over 1? I’m not sure its just a thought.

    i think the spokesman should be Wadsworth too

  4. I have milky white block.
    Mass= 59.579 g
    Volume= 6.61 cm x 3.88 cm x 2.55 cm = 65.40 cm3
    D = m / V
    D = 59.579 g / 65.40 cm3
    D = 0.9110 g/cm3

    • CORRECTION:
      Milky white block
      Mass= 59.579 g
      V= lxwxh
      V= 6.61 cm x 3.88 cm x 2.55 cm
      V= 65.4 cm3
      D=m / V
      D=59.579 g / 65.4 cm3
      D=0.911 g/cm3
      PREDICTION:
      Milky white = Delta

  5. Everybody show your calculations on the website (with correct number of sig figs and unit) and your final density. Also say what color block you have !!!

  6. Black Block:
    Volume – (9.50 cm) x (4.52 cm) x (2.49 cm) = 107 cm3
    Mass – 110.419 g
    Density – (110.419 g) / (107 cm3) = 1.03 g/cm3

  7. Paper White Block:
    V=lwh
    V= 14.23 cm x 3.39 cm x 1.31 cm
    V= 63.2 cm3
    mass: 31.715 g
    D= m/V
    D= 31.715 g / 63.2 cm3
    D= 0.502 g/cm3

  8. Paper White block:
    V=l x h x w
    l = 4.19 cm
    h = 8.81 cm
    w = 1.81 cm
    V= 4.19 cm x 8.81 cm x 1.81 cm
    V= 66.8 cm3

    mass = 38.420 g

    Density= mass/volume
    Density= 38.420 g / 66.8 cm3
    Density of the paper white block = 0.575 g/cm3

  9. Black block:

    Volume:
    V= l x w x h
    V= 7.32 cm x 3.31 cm x 2.50 cm
    V= 60.57 cm3

    Mass: 85. 673 g

    Density:
    D= m / V
    D= 85.673 g / 60.57 cm3
    D= 1.41 g/cm3

    The density for my black block is 1.41 g/cm3.

  10. hi everyone!! make sure you have posted all your data to the website so we can back up our final answers!!
    for example (what you should probably include):
    color of block
    Volume (including ALL WORK & correct sig figs)
    mass
    Density (including ALL WORK & correct sig figs)
    ^^^ and for ALL of these make sure to have the correct units!!

  11. Okay everyone! I have now discovered that my block is not black, but it is GRAY! I am so sorry for the confusion. Here is my new work!

    Gray Block:

    Volume:
    V= l x w x h
    V= 7.32 cm x 3.31 cm x 2.50 cm
    V= 60.57 cm3

    Mass: 85. 673 g

    Density:
    D= m / V
    D= 85.673 g / 60.57 cm3
    D= 1.41 g/cm3

    The density for my gray block is 1.41 g/cm3.

  12. Clear block:

    Volume:
    V=l x w x h
    V= 3.10 cm x 2.35 cm x 8.10 com
    V= 59.0 cm3

    Mass:
    m=70.50 g

    Density:
    D= m/V
    D= 70.50 g/ 59.0 cm3
    D= 1.19 g/cm3

  13. Clear block:

    Volume:
    V=lwh
    V=7.10 cm x 9.55cm x 1.25cm
    V=84.76 cm3

    Mass:
    99.767 g

    Density:
    D=m/V
    D=99.767 g/ 84.76 cm3
    D=1.18 g/cm3

  14. White Block:

    Volume:
    V= l x w x h
    V= 8.65 cm x 8.15 cm x 1.10 cm
    V= 77.5 cm3

    Mass:
    m= 42.30 g

    Density:
    D= m/V
    D= 42.30 g/ 77.5 cm3
    D= 0.546 g/cm3

  15. Black block:

    Volume:
    V= l x w x h
    V= 9.50 cm x 4.52 cm x 2.49 cm
    V= 107 cm3

    Mass:
    110.372 g

    Density:
    D= m/V
    D=110.372 g/ 107 cm3
    D=1.03 g/cm3

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