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22 November, 02:10

A dark grey rock has a mass of 80 grams. When dropped in water, it makes the water level rise from 70 mL to 90 mL. What is the density of the rock?

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Answers (2)
  1. 22 November, 02:30
    0
    I don't remember how to label it, but it is 20.

    Explanation:

    The answer is 20 because once you dat the rock in the water, that is how much it changed.
  2. 22 November, 04:38
    0
    The density of the rock is 4 g/mL

    Explanation:

    The formula to be used here is that of density as shown below

    Density = mass : volume

    From the question, the mass of the dark grey rock is 80 grams

    The volume of the rock is 90 mL - 70 mL = 20 mL (the reason for subtracting is because we concerned about the volume of the rock and not the volume of the water, thus when the rock caused a rise in the volume of the water, that "rise" is the volume of the rock.

    Density = 80 : 20

    Density = 4 g/mL

    The density of the rock is 4 g/mL
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Home » Chemistry » A dark grey rock has a mass of 80 grams. When dropped in water, it makes the water level rise from 70 mL to 90 mL. What is the density of the rock?
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