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I need help with this problem. Please show your work and answer. Irrelevant posts will be marked as spam and reported. The density of gold is 19.3 g/cm^3. A 5.8 mg piece of gold is hammered into a square that is 7.5x10^-6 cm thick. What is the length of a side of the square in cm?

I need help with this problem. Please show your work and answer. Irrelevant posts will be marked as spam and reported. A mineral oil has a density of 0.825 g/cm^3. Suppose you spread 0.75 g of this oil over the surface of water in a large can (cylinder) which has a diameter of 21.6 cm. How...