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6 September, 07:11

A 2.95 g piece of zinc (density = 7.14 g/mL) is added to a graduated cylinder that contains 12.13 mL H2O. What will be the final volume reading on the graduated cylinder?

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  1. 6 September, 07:34
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    12.54mL

    Explanation:

    Step 1:

    Data obtained from the question:

    Mass of Zn = 2.95g

    Density of Zn = 7.14 g/mL

    Volume of water = 12.13mL

    Final volume reading of cylinder = ... ?

    Step 2:

    Determination of the volume of Zn. The volume of Zn can be obtained as follow:

    Density = Mass / volume

    7.14 = 2.95/volume

    Cross multiply

    7.14 x Volume = 2.95

    Divide both side by 7.14

    Volume = 2.95/7.14

    Volume of Zn = 0.41mL

    Step 3:

    Determination of the final volume reading of the cylinder.

    The final reading of the cylinder will be the addition of the volume of water and the volume of Zn as shown below:

    Final volume of cylinder = volume of water + volume of Zn.

    Volume of water = 12.13mL

    Volume of Zn = 0.41mL

    Final volume = ... ?

    Final volume of cylinder = 12.13 + 0.41

    Final volume of cylinder = 12.54mL

    Therefore, the final volume reading of the cylinder is 12.54mL
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