Question

The aluminum foil in a package is usually 75ft2 and has a mass of 12 ounces. Aluminum has a density of 2.70 grams per milliliter. What is the approximate thickness of a sheet of aluminum foil in millimeters? One inch=254cm; one pound=454grams; one pound =16 ounces

Answer 1

One pound= 454 grams

One pound =16 ounces

16 ounces= 454 grams

1 ounce= 28.4 grams

12 ounce= 12×28.4 grams

= 340.8 grams

Density of Aluminum = 2.70 g mL⁻¹

Volume of Aluminum =
`(340.8)/(2.7)`

=126.2 mL

=126.2 cm³

`75 ft^(2) * 12 (in)/(ft) * 12 (in)/(ft) * 2.54 (cm)/(in) 2.54 (cm)/(in) = 69,677.28 cm^(2)`

69,677.28 cm²× Thickness = 126.22 cm³

Thickness:

`(126.22 cm^(3))/(69,677.28 cm^(2)) = 0.00181 cm`