Forensics C

Test your knowledge of various Science Olympiad events.
User avatar
sciduck
Exalted Member
Exalted Member
Posts: 98
Joined: May 7th, 2016, 4:50 pm
Division: C
State: MN
Location: Wayzata
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by sciduck » November 15th, 2016, 8:14 pm

pikachu4919 wrote:
sciduck wrote:What chemical is used to stop the heart in a lethal injection?
KCl
I don't see why not. That's right, your turn.

User avatar
pikachu4919
Moderator
Moderator
Posts: 705
Joined: December 7th, 2012, 2:30 pm
Division: Grad
State: IN
Pronouns: She/Her/Hers
Location: West [Favorite Fightin' Frenchman!]
Has thanked: 38 times
Been thanked: 95 times

Re: Forensics C

Post by pikachu4919 » November 16th, 2016, 2:00 am

Based on this mass spec:

Image

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?

User avatar
sciduck
Exalted Member
Exalted Member
Posts: 98
Joined: May 7th, 2016, 4:50 pm
Division: C
State: MN
Location: Wayzata
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by sciduck » November 17th, 2016, 11:26 am

pikachu4919 wrote:Based on this mass spec:

Image

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?

User avatar
pikachu4919
Moderator
Moderator
Posts: 705
Joined: December 7th, 2012, 2:30 pm
Division: Grad
State: IN
Pronouns: She/Her/Hers
Location: West [Favorite Fightin' Frenchman!]
Has thanked: 38 times
Been thanked: 95 times

Re: Forensics C

Post by pikachu4919 » November 17th, 2016, 9:28 pm

sciduck wrote:
1. ~84
2. ~163
3. Isotopes?
Yep! Your turn! ;)

User avatar
sciduck
Exalted Member
Exalted Member
Posts: 98
Joined: May 7th, 2016, 4:50 pm
Division: C
State: MN
Location: Wayzata
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by sciduck » November 18th, 2016, 3:31 pm

What are the burn test results for polystyrene?

User avatar
yellow_squirtle
Member
Member
Posts: 18
Joined: August 18th, 2014, 6:02 pm
Division: C
State: TX
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by yellow_squirtle » December 25th, 2016, 9:11 pm

sciduck wrote:What are the burn test results for polystyrene?
yellow flame, burns quickly, plastic drips, gas odor, black smoke with soot

User avatar
sciduck
Exalted Member
Exalted Member
Posts: 98
Joined: May 7th, 2016, 4:50 pm
Division: C
State: MN
Location: Wayzata
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by sciduck » December 26th, 2016, 1:30 pm

yellow_squirtle wrote:
sciduck wrote:What are the burn test results for polystyrene?
yellow flame, burns quickly, plastic drips, gas odor, black smoke with soot
Yup, your turn
———————————————
SCIDUCK uses CONFUSION!
 ———————————————

User avatar
yellow_squirtle
Member
Member
Posts: 18
Joined: August 18th, 2014, 6:02 pm
Division: C
State: TX
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by yellow_squirtle » December 30th, 2016, 12:51 am

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

User avatar
sciduck
Exalted Member
Exalted Member
Posts: 98
Joined: May 7th, 2016, 4:50 pm
Division: C
State: MN
Location: Wayzata
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by sciduck » December 30th, 2016, 9:55 pm

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 uses CONFUSION!
 ———————————————

User avatar
yellow_squirtle
Member
Member
Posts: 18
Joined: August 18th, 2014, 6:02 pm
Division: C
State: TX
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by yellow_squirtle » January 2nd, 2017, 11:04 pm

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

Locked

Return to “2017 Question Marathons”

Who is online

Users browsing this forum: No registered users and 1 guest