Calculate the density (g/cm3) of an aluminum cylinder, given the following data: height=3.55cm, diameter=1.1cm, and mass is 9.1grams...
the diameter thing has me confused...I need a refresher.
Thank you!
2006-06-07 14:37:36 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Ok...getting confusing and I am getting lots of differents answers here, allow me to clarify:
Mass= 9.1g
Ht= 3.55cm
diameter= 1.1cm
The solution will be grams per cm cubed
2006-06-07 15:08:09 · update #1
man....no wonder the USA is so far behind in the sciences!
GADS these answers are scary!
Density is simply mass per unit volume.
They give you the dimensions so you can get the volume.
The volume of the cylinder is: area * height
V = [(pi)hd^2]/4
d = diameter = 1.1 cm
h = height = 3.55 cm
pi = 3.141592654...
m = 9.1 g
V = 3.374 cm^3
Then....mass per unit volume is:
Density = m/V = 2.697 g/cm^3
The actual density of Aluminum is: 2.70 g/cm^3
So, the calculation is good.......as would be expected.
2006-06-07 15:03:07 · answer #1 · answered by Anonymous · 4⤊ 0⤋
Density= Mass/Volume
you need to use the RADIUS of a cylinder to find the volume (radius is 1/2 the diameter)
so...... HxR=1.9525 so... 9.1/1.9525 = 4.660
2006-06-07 21:57:08 · answer #2 · answered by michael_lovin 5 · 0⤊ 0⤋
the volume of a cylinder is pi * h * radius ^ 2
remember the radius is the diameter/2
once you find the volume, you can divide mass / volume, but you already knew that. ;)
2006-06-07 21:42:24 · answer #3 · answered by cnuswte 4 · 0⤊ 0⤋
volume =3.14*0.55*3.55*3.55=21.7654
where 0.55 is radius
mass=9.1 g
density=mass /volume
9.1/21.7654=0.418
aluminum density can not be such low it is around 6g/cm3
OK so u r problem is wrong
2006-06-07 21:49:04 · answer #4 · answered by rohit m 1 · 0⤊ 0⤋
Chemisty was my worst subject in high school and university. You don't want my help.
2006-06-07 21:40:57 · answer #5 · answered by Adam 7 · 0⤊ 0⤋
oh my goodness, you already had me confused in calculate. i'm sorry i'm really really really bad at math
2006-06-07 21:40:45 · answer #6 · answered by Demonfairy 2 · 0⤊ 0⤋
9.1g/3.372cm^3 =2.7g/cm^3
2006-06-07 22:25:19 · answer #7 · answered by bige1236 4 · 0⤊ 0⤋