Posted by **Lisa ** on Saturday, February 2, 2013 at 4:27pm.

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?

- Chemistry -
**DrBob222**, Saturday, February 2, 2013 at 4:49pm
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.

- Chemistry -
**Lisa **, Saturday, February 2, 2013 at 5:05pm
when I was copying and pasting the problem the units and numbers did not transfer... I completely understand that you need these units

- Chemistry -
**Lisa **, Saturday, February 2, 2013 at 5:07pm
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?

- Chemistry -
**Lisa **, Saturday, February 2, 2013 at 5:08pm
20.02cm*

- Chemistry -
**DrBob222**, Saturday, February 2, 2013 at 5:15pm
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.

- Chemistry -
**Lisa **, Saturday, February 2, 2013 at 5:24pm
thank you

- Chemistry -
**cris**, Monday, December 1, 2014 at 6:54am
is the answer 4218.95 mm?

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