Magnesium ion entering a mass spectrometer. find r

[XxphysicsxX]

Homework Statement

A magnesium ion (Mg 2+) traveling at 60000 m/s enters a mass spectrometer with a magnetic field intensity of 800T. Calculate the radius of deflection forthe magnesium ion.

800T = |B|
24.31g/mol = m
60000 m/s = v
1.66* 10^-27= Atomic mass unit
r=?

Homework Equations

r= (mv)/ |q||B|

The Attempt at a Solution

(24.31g/mol )(1.66* 10^-27 kg)(60000m/s)
= ------------------------------------------------------
(1.60 * 10^-19 C)(2)(800T)

= 9.45* 10^-6 m

but the right answer is supposed to be 9.39* 10^-6m


can anyone let me know where I've made a mistake?
Thank you in advance!

 

[supratim1]

you made a mistake.
what is (24.31g/mol )(1.66* 10^-27 kg) in the numerator?

what you need to do is - convert g/mol into kg/atom, using the avogadro's constant.

think and try it.