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    Sharpdoc Posts: 2, Reputation: 1
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    #1

    Jan 25, 2010, 09:46 AM
    I need help setting up my chemistry problems
    I am looking for assistance with setting up chemistry questions.
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    Sharpdoc Posts: 2, Reputation: 1
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    #2

    Jan 25, 2010, 09:49 AM

    Ultra pure silicone is used to make solid-state devices, such as computer chips. What is the mass of a circular cylinder of silicone that is 12.40 cm long and has a radius of 4.00cm? The density of silicone is 2.33 g/cm3
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    ebaines Posts: 12,131, Reputation: 1307
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    Jan 25, 2010, 11:44 AM

    I'll help you get started. You multiply the volume of the cylinder in cm^3 by the density in g/cm^3, to get the total mass in grams. The volume of the cylinder is its length times the area of the circle that forms the cylinder's base. Recall that the area of a circle is equal to times the radius squared.

    Post back with the answer, and someone will be glad to check it for you.
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