Organic Chemistry Answers

Sodium-24 is used to treat leukemia and has a half-life of 15 hours. A patient was injected with a salt solution containing sodium-24. What percentage of the 24Na remained after 48 hours?

The leachate pond consists of tropic acid at a concentration of 3.5 x 10^-4 M. If the combustion reaction in d(i) releases -1215kJ, calculate the temperature change of the pond assuming that the pond has a volume of 15000L, density of 1080g/L and its specific heat is the same as pure water.          

If on one amino acid, there are two amine groups and two COOH attached, and all of their 4 pka values are given how do you find the isoelectric point?

Which one of the following dienes is an allene?       

A. CH2=CHCH2CH2CH=CH2

B. CH2=CHCH=CHCH2CH3

C. CH3CH=C=CHCH2CH3

D. CH3CH=CHCH=CHCH3

Synthesize the tripeptide Gly-Ala-Phe using solution phase synthesia

Why in group 14 of the periodic table there is a large conductivity difference compared to the other groups

OH

H₂O

Warm

X

'X' in the above conversion is

In a bomb calorimeter, 50g of a fuel was placed into the sample dish and was

allowed to undergo combustion. After the combustion, the water in the

calorimeter experienced an increase in temperature from 28°C to 32°C. Calculate

the heat of combustion of the fuel. Assume the volume of the calorimeter is 4 liters

and density changes in the water to be negligible. Use the heat capacity of water

to be 4.18 J/g°C. Assume that the calorimeter does not absorb any of the heat from

the combustion reaction.

24.Consider the following statements:

Sucrose is the sweetest of all naturally occurring carbohydrates

Acetylene is the basic chemical building block of natural rubber

Which of the above statements is / are correct?

[A] Only 1

[B] Only 2

[C] Both 1 & 2

[D] Neither 1 nor 2

24.Consider the following statements:

Sucrose is the sweetest of all naturally occurring carbohydrates

Acetylene is the basic chemical building block of natural rubber

Which of the above statements is / are correct?

[A] Only 1

[B] Only 2

[C] Both 1 & 2

[D] Neither 1 nor 2