In: Chemistry
A package of aluminum foil is 66.7 yards long, 12 inches wide, and 0.00030 inches thick. Aluminum has a density of 2.70 g/cm^3. What is the mass, in grams, of the foil?
a. 250 grams
b. 380 grams
c. 100 grams
d. 8.8 grams
answer : b.) 380 grams
length = 66.7 yards
= 66.7 x 0.9144 m
= 60.99 m
= 6099 cm
width = 12 inches = 12 x 2.54
= 30.48 cm
thickness = 0.00030 in = 0.000762 cm
volume = length x width x thickness
= 6099 x 30.48 x 0.000762
= 141.655 cm^3
density = mass /volume
2.70 = mass / 141.655
mass = 380 g