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pikachu4919 wrote:

sciduck wrote:What chemical is used to stop the heart in a lethal injection?

Do alumni still count..? (Click to Show Hidden Text)

KCl

pikachu4919 wrote:Based on this mass spec:



1. Mass of most abundant component in this substance
2. Mass of the substance
3. Why are several short peaks present around each larger one?

1. ~84
2. ~163
3. Isotopes?

sciduck wrote:

- (Click to Show Hidden Text)

1. ~84
2. ~163
3. Isotopes?

sciduck wrote:What are the burn test results for polystyrene?

yellow flame, burns quickly, plastic drips, gas odor, black smoke with soot

yellow_squirtle wrote:

sciduck wrote:What are the burn test results for polystyrene?

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yellow flame, burns quickly, plastic drips, gas odor, black smoke with soot

yellow_squirtle wrote:Why is acetone a good solvent to use for paper chromatography on permanent markers?

Acetone is nonpolar. Permanent markers use nonpolar ink (so water won't wash it away). Like dissolves like, so the acetone can actually move the permanent marker ink up the paper.

sciduck wrote:

yellow_squirtle wrote:Why is acetone a good solvent to use for paper chromatography on permanent markers?

. (Click to Show Hidden Text)

Acetone is nonpolar. Permanent markers use nonpolar ink (so water won't wash it away). Like dissolves like, so the acetone can actually move the permanent marker ink up the paper.

I believe acetone is polar, but it shares both polar and nonpolar properties. Please correct me if I am wrong. Regardless, your turn :--)