Achieve #19

[Cheyenne Roberts 2A]

Hi guys can someone help me through the steps with #19 on Achieve? it is about the minimum uncertainty of an electron's velocity and I have rearranged the Heisenberg equation but I am not sure what I am missing with my conversions.

[Kait Nguyen]

To find the velocity you are ultimately going to rearrange the momentum formula Δp=m Δv and with the information given, you can find Δp

First rearrange Heisenberg’s: Δp=h/4pi(Δx)
Where Δx is the position known in Å, so convert to meters, then solve for Δp

From there you can plug in Δp=9.11x10^-31(Δv) and find v for the first part

Part 2 is the same process but with a different mass. Instead of using the electron’s mass, you need to find Helium’s mass.

Therefore, using He is 4g/mol divide:
4/6.022x10^23

Hope this helps!