The density of zinc is 455 lb/cubic feet. Find the mass of 9.00 cubic centimeters of zinc. Anyone know how to set this up?
2007-08-23 09:41:10 · 2 answers · asked by softballbabe7033 1 in Education & Reference ➔ Homework Help
use ratios with feet to centimeter conversions.
2007-08-23 09:48:02 · answer #1 · answered by Full Metal Jackson 3 · 0⤊ 0⤋
This is a pretty nasty conversion, mass is pretty much always given in kilograms so that is what your final answer will be in. I would do that first. 1 lb = 0.45359 kgs. so
455lb/cubic feet. * 0.45359 kgs/lb = 206.38345 kgs/cubic ft.
Now you have that you have to get the cubic ft to cubic cm.
1 cm = 0.3937 inches so 1 cm ^3 = (0.3937)^3 cubic inches or.061023 cubic inches. Now another multiplication to get into cubic feet. 1 Cubic Inch = 0.00058 Cubic Ft so
0.00058 (Cubic Ft / Cubic Inch) * .061023 cubic inches =
0.00003539334 cubic feet. So this is the cubic cm to cubic feet. You have 9 cubic cm.
9 * 0.00003539334 = 0.00031854006 cubic feet.
The final multiplication is
206.38345 kgs/cubic ft * 0.00031854006 cubic feet. =
0.065741 Kilograms of zinc
2007-08-23 17:37:02 · answer #2 · answered by Vinny G 2 · 0⤊ 0⤋