Chemistry

The density of aluminum is . A square piece of aluminum foil, 20.02 on a side is found to weigh 2.573 .What is the thickness of the foil, in millimeters?

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1. You didn't provide the density.
20.02 what?
2.573 what?
We just went through this you first post. You should catch on soon that these problems don't mean a thing without units.
If I weigh 150 WHAT that could be 150 pounds, 150 kg, 150 tons, 150 grams.

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posted by DrBob222
2. when I was copying and pasting the problem the units and numbers did not transfer... I completely understand that you need these units

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posted by Lisa
3. The density of aluminum is 2.70 g/cm^3. A square piece of aluminum foil, 20.02 on a side is found to weigh 2.573g. What is the thickness of the foil, in millimeters?

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posted by Lisa
4. 20.02cm*

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posted by Lisa
5. density = mass/volume. You have the mass and density, solve for volume, then substitute volume into the below equation and solve for thickness.
volume = length x width x thickness.
v = 20.02 x 20.02 x thickness.

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posted by DrBob222
6. thank you

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posted by Lisa
7. is the answer 4218.95 mm?

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posted by cris

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