## Help with problem

$\Delta p \Delta x\geq \frac{h}{4\pi }$

Daniel Kim 1D
Posts: 38
Joined: Wed Oct 03, 2018 12:17 am

### Help with problem

Hello I was looking if someone could clarify how to solve problem #1 on Test #2. It is about finding the uncertainty in velocity of the carbon monoxide molecule within the sac. When the sac has a diameter of 2*10^-4m.

Erica Li 1C
Posts: 31
Joined: Fri Sep 28, 2018 12:17 am

### Re: Help with problem

Since you are given diameter (2x10^-4 m) and you are trying to find velocity, you just have to figure out what the mass of oxygen is since it's asking for uncertainty of velocity of the oxygen molecule. Since oxygen is diatomic, it's O2, so when you find the mass it would be 32 g/mol x 1/6.022x10^23, which is 5.31x10^-23 g-- but since the mass unit in the Heisenberg equation is kg, it would be 5.31x10^-26 kg. From there you just plug numbers in and solve!