I have a similar lab practicum. Basically there is a certain mass on a spring and we need to find the height it must be dropped from.
I don't know what heights I should use. I also don't understand how to find the spring constant. Can someone please help me?
EDIT: I have not posted any work...
Ok there's part 2 to this question. It looks so similar to this, but the same method doesn't give me the right answer.
Part 2: What is the average kinetic energy per
molecule of Ne?
Part 3: What is the average total kinetic energy of
He? Answer in units of J.
wow, it was just a matter of typing it in correctly. I can't believe this, because I am doing these online, so I didn't know how to type in very small values like with exponents.
A gas contains a mixture of He and Ne.
The gas is at a temperature of 448 K, with
0.85 mole of He and 2 mole of Ne.
Avogadro’s number is 6.02 × 1023 mol−1,
and Boltzmann’s constant is 1.38×10−23 J/K.
What is the average kinetic energy per
molecule of He? Answer in units of J.
2...
V = 7238.23 cm^3 x (0.001 L / 1 cm^3) = 7.24 L
0.789 atm (7.24 L) = n (0.082 L·atm·K−1·mol−1) (349.15 K)
n = 0.1995 mol x (6.022e23 / 1 mol) = 1.20e23 atoms
Still this is not the right answer I think.
I tried this problem a lot of times, but just didnt get the answer.
The molecular mass of helium is 4 g/mol,
the Boltzmann’s constant is 1.38066 × 10−23 J/K, the universal gas constant is
8.31451 J/K · mol, and Avogadro’s number
is 6.02214 × 1023 1/mol. Given: 1 atm =
101300 Pa.
How...