<p>the first part of that is definitely true (thats why u get cold when ur wet) and i'm fairly positive the second part is true also.</p>
<p>im not sure if the second explains the first though, but i guessed TTCE</p>
<p>for the isomer one, there was
Cl Cl Cl H Cl Cl
\ / \ / \ /
C==C C==C C==C
/ \ / \ / \
H H H Cl H Cl
clearly, the isomers are the first 2.</p>
<p>ugh, ignore the diagrams, the spacing all goes away once i post lol.</p>
<p>The Answer is No2. NO2 is most harmful.</p>
<p>well im sure it IS the most harmful. too bad the question asked for which is LEAST harmful.</p>
<p>yeah i asked my teacher today and she said TTCE is right for the evaporation Question! Yay~~ kk and isomers..turned out to be (a)(c).. maybe kk</p>