Achieve #17

[Anisa Morales 1L]

Hello,

Im confused on question #17, "The average speed of a diatomic chlorine molecule at 25 ∘C is 323.9 m.s^−1 .What is the average wavelength of a chlorine molecule at this temperature? Assume that the molecule acts as a single particle."

I know what equation we are suppose to use ( lambda = h/mv ). I also know that v= 323.9 m.s^-1.

I think I also know how to get the mass: I multiply 2 x 35.453(chlorine's molar mass) then I divide that by Avogadro's number. After that I convert the grams into kg.

However, when I plugged everything into the equation, I keep getting it wrong. What am I missing?

[Nithya Narapa Reddy]

I also kept getting that problem wrong and I realized that I kept using grams of the single molecule of the element instead of the element in its diatomic state, so try doing that to see if it changes.

[Juliana Misirian]

I was also having trouble with this equation. I would say to double-check your conversions and stuff. For example, what really messed me up was dividing Avogadro's number by the mass of chlorine. I figured out that my answer should be 11.77449 x 10^-23 g. So when you convert it to kg, it should be 11.77449 x 10^-26. After fixing that, I was able to finally get the answer.

[005493723]

This equation took me a few tries as well, make sure you're using the diatomic mass if that's what your problem asks for. Also make sure the sig figs and units are correct, I know that messes me up a lot.

[Alexander Moroz 1B]

Make sure your mass is in kg and not g! Also make sure your scientific notation is correct because when I inputted it into my calculator I forgot parentheses and got the power of 10 number messed up.