# Chemistry

A star is estimated to have a mass of 4.4x1026lbs. It has a diameter of 8.69x105 mi. Calculate the density in g/cm3.

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1. I assume this star is a sphere.
Change the 4.4E26 lb to grams. You know there are 454 g/lb.
Change 8.69E5 miles to cm. You know there are 5,280 ft/mi and 12 in/ft and 2.54 cm/in. Radius is 1/2 diameter Volume of a sphere is 4/3*pi*r^3
Then density = g/cc
Post your work if you get stuck.

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