Posted by **melissa** on Wednesday, February 6, 2013 at 2:56am.

the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density

- general chemistry -
**Devron**, Wednesday, February 6, 2013 at 3:15am
I am assuming that 99pm means pico meters, so 99pm = 99 x 10^-7 cm

D=mass(g)/volume(cm3)

Plug in the value for radius into the equation to solve for the volume which will have units of cm^3

v=4/3πr^3

Since density=mass(g)/volume(cm3),

Solve for density,

D= (5.89 X 10^-23 g/volume calculated in cm^3)

- general chemistry -
**melissa**, Wednesday, February 6, 2013 at 9:56am
so to get volume, you do v=(1.33)*3.14*99e-7^3????

- general chemistry -
**Devron**, Wednesday, February 6, 2013 at 7:06pm
Yes.

- general chemistry -
**Devron**, Thursday, February 7, 2013 at 12:32pm
But, I gave you the wrong units for 99pm in cm, it should be 99x10^-10. I apologize about that

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