# Chemistry Equation Problem

• Jan 17th 2010, 06:01 PM
thebristolsound
Find the radius of an aluminum cylinder that is 2.00 cm long and has a mass of 12,4 g. For a cylinder, V=πr^2h

Thank you

Would I just need to find the density of aluminum at room temperature?
• Jan 18th 2010, 12:14 AM
Hello thebristolsound
Quote:

Originally Posted by thebristolsound
Would I just need to find the density of aluminum at room temperature?

Yes, you will certainly need the density. Then use:
$\text{volume }= \frac{\text{mass}}{\text{density}}$
When you have the volume, solve the equation
$V = \pi r^2h$
for $r$; namely:
$r =\sqrt{\frac{V}{\pi h}}$
Can you do it now?