Lab quiz #2

Question 1

how long is a c-c single bond?

Answer 1

1.54 angstroms

Question 2

how long is a c=c double bond

Answer 2

1.34 angstroms

Question 3

what is the ideal angle around an sp3 c

Answer 3

109.5 degress

Question 4

what is the ideal angle around an sp2 c

Answer 4

120 degrees

Question 5

a lower energy conformation is _____ stable than a higher energy conformation

Answer 5

more

Question 6

what is chirality

Answer 6

chirality describes molecules that are not the mirror image of each other.

Question 7

What is butanes formula. Draw a cis and trans butene

Answer 7

C4H8

Question 8

is trans lower in energy or Cis?

Answer 8

Trans

Question 9

what is the shape of the cyclohexane 6-membered ring?

Answer 9

chair

Question 10

when did helicity arise in the series of arenes

Answer 10

3 rings

Question 11

how do you calculate the rf

Answer 11

distance traveled by compound/distance traveled by solvent

Question 12

is a 50:50 hexane:acetone solvent more or less polar than an 80:20 solvent?

Answer 12

50:50 is more polar than 80:20

Question 13

is hexane polar or non polar

Answer 13

non polar

Question 14

is acetone polar or nonpolar

Answer 14

polar

Question 15

which compounds will go further on the TLC plat?

Answer 15

depends on the mixture of the solvent. if solvent is more polar, polar molecules will go further, but is the solvent is non polar than non polar molecules will go further.

Question 16

what does TLC stand for

Answer 16

thin layer chromatography