Friday
August 29, 2014

Homework Help: Chemistry

Posted by Erin on Friday, March 5, 2010 at 9:55pm.

An alpha particle (mass 6.6 x 10^-24 grams) emitted by radium travels at 3.4 x 10^7 plus or minus 0.1 x 10^7 mi/h.

(a) What is its de Broglie wavelength (in meters)?

(b) Whats uncertainty in its position?

for part (a) I got 1.53 meters which said it was wrong on Aris and I got 1.56 x 10^-56 meters for part (b) the uncertainty which said it was wrong too.

This is how I solved it please tell me what I did wrong:

part (a) lambda =h/mu

first convert mi/hr to meters/sec
3.4 x 10^7mi/hr = 1.52 x 10^7m/s

(6.626 x 10^-34 kg m^2 s)/(6.6 X 10^-27 kg)x(1.52 x 10^7 m/s)
= 1.53 meters

part (b) delta(x) x m delta u is greater than or equal to h/4 pi.

so, delta (x) is greater than or equal to (h)/ (4 pi) x (m) delta (u)

delta x= (6.626 x 10^-34 kg m^2 s)/ (4 pi) x (6.6 x 10^-27 kg)(4.48 x 10^5 m/s)
= 1.56 x 10^-55 meters

I also converted the mass 6.6 x 10^-24 grams into kilograms, making it 6.6 x 10^-27 kilograms.

Please look this over and correct my error, thank you.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - An alpha particle (mass 6.6 x 10^-24 grams) emitted by radium ...
chemistry - An alpha particle (mass = 6.6 10-24 g) emitted by radium travels ...
Chemistry - An alpha particle (mass = 6.6 10-24 g) emitted by radium travels at ...
Physics - Marie Curie first identified the element radium in 1898. She found ...
Physics - An atomic nucleus of radon initially moving at 530 m/s emits an alpha ...
physics - An atomic nucleus of radon initially moving at 515 m/s emits an alpha ...
Physics - An alpha particle (mass=6.68x10^-27kg)is emitted from a radioactive ...
p - A uranium nucleus (mass 238 u), initially at rest, undergoes radioactive ...
physics - A uranium nucleus (mass 238 u), initially at rest, undergoes ...
CHEM - the nuclide 232 Th 90 is radioactive. when one of the atoms decays, a ...

Search
Members