<p>^Agreed and yea, there was</p>
<p>Yes, you didn’t need to know the constant, but I still used it because i didn’t see that the answer could be found easily without even using it :(</p>
<p>IF you’re referring to 273K and 2atm, you can just use PVT by assuming that a mole of N is 22.4 at STP. O_o</p>
<p>OH okay. DON’T scare me like that, haha</p>
<p>The first TTCE was T/F. Constant temperature means that the average kinetic energy of the gas molecules remains constant. This means that the rms speed of the molecules, u, remains unchanged (hence the second part was wrong). Remember KE=1/2mv^2. So if
KE stays constant as temperature stays constant then velocity also stays constant as mass stays the same</p>
<p>so what was the answer for the one with 2atm?</p>
<p>11.2 l…</p>
<p>lol… i hate people that don’t bother to read this whole thread.</p>
<p>What does a 79 raw score translate to usually?</p>
<p>can somebody confirm the answer to 101?</p>
<p>4 blank, small chance for 800 but I’ll be fine w/ 770+</p>
<p>2 atm one was 11.2 L. Double the pressure at STP means 1/2 the volume at STP</p>
<p>Another answer was 22.4 L, you had a 1:1 mol ratio at STP</p>
<p>H2 and O2 can be collected over water, can someone confirm?</p>
<p>I put NaF (largest difference in electronegativity) for the highest melting point, but doesn’t the fact that At is the largest halogen make it hardest it melt?</p>
<p>790-800 probably 800</p>
<p>for the one that can’t be collected over water i put HCL. what was the question for 101?</p>
<p>NaAt had the highest melting point: this is question that dealt with intermolecular forces not intramolecular forces. While NaF has the biggest electronegativity difference (and is therefore very polar (ionic)), NaAt has the biggest amount of dispersion.</p>
<p>^ Nah, because the greatest difference in electronegativity makes the strongest bond, therefore the hardest to melt. Also, H2 and O2 can be collected over water. I’m in the same boat as you score wise too, lol</p>
<p>When you melt a substance you are breaking bonds between molecules- not between the Na and the F.</p>
<p>Ladidada,</p>
<p>You could look up the melting point numbers on Wikipedia, you know.</p>
<p>And At is radioactive. Not sure if that matters, but still.</p>
<p>i put NAF 10 char somebody confirm number 101
something about temperture and volume anbody put ttce</p>
<p>hm anybody remembr the H2S and HCl balancing question was the coifficient 1 ?
I’ve confirmed the ionic balancing was 2(I guessed it right!)</p>
<p>I also looked up on wikipedia the melting points numbers, and it decreased going from NaF to NaCl, so obviously the trend continues</p>
<p>If you have a link to that wikipedia page please put it up- I’d love to look it up! Thanks</p>