Organic Chemistry Answers

A 0.222 g sample of carbon dioxide, CO2, has a volume of 557 mLand a pressure of 491 mmHg

What is the temperature of the gas in kelvins?

. A peptide was cleaved into two smaller peptides with cyanogen bromide (CNBr) and into two different peptides by trypsin (Tryp). Their sequences were as follows: 

CNBr 1: Gly-Thr-Lys-Ala-Glu 

CNBr 2: Ser-Met 

Tryp 1: Ser-Met-Gly-Thr-Lys 

Tryp 2: Ala-Glu 

What was the sequence of the original peptide?

. A solution containing egg albumin (pI=4.6), β-lactoglobulin (pI=5.2), and chymotrypsinogen (pI=9.5) was loaded onto a column of diethylaminoethyl cellulose (DEAE-cellulose) at pH 5.4.The column was then eluted with a pH 5.4 buffer, with an increasing salt concentration. Predict the elution pattern. 

Write the Lewis and Kekule structures of the following (show your solutions following the steps):

i. NH₂OH

ii. CH₃CH₃

iii. CH₃OH

iv. CH₃NH₂

v. CH₃Cl

vi. CH₃SH

vii. H₂O

viii. CO₃^(-)

ix. H₃O ⁽⁺⁾

x. NO₃^(-)

a.) Complete the following chemical formula based on the valence electrons and electronic configuration. Make sure to follow the octet rule. Answer with solution please. Thank you :)

i. CCl_?

ii. CH_?Cl₂

iii. SiF_?

iv. CH_?O

v. CH₃CH_?

vi. CH_?NOH_?

vii. CH_?NNH_?

viii. CH_?NO

ix. CH_?NH

x. HNNH_?

In an enzyme reaction experiment, the concentration of the substrate S

S is varied and the velocity measured for each concentration, giving the following data.

[S](mM)= 0.2, 0.4, 0.6, 0.8, 1.0

V(μM/min)= 0.38, 0.62, 0.79, 0.91, 1

By sketching the Lineweaver-Burk plot of 1/V against 1/[S] determine an approximation of

Km and Vmax. No need to sketch.

Which of the following is the best approximation of Km and the maximum velocity Vmax?

How will you prepare 100 ml of 0.20M sodium chloride solution?

In what direction (toward the anode, toward the cathode, or toward neither) will the following 

proteins move in an electric field?

a. Serum albumin (pI=4.9) at pH 8.0

b. Urease (pI=5.0) at pH3.0 and pH 9.0

c. Ribonuclease (pI=9.5) at pH 4.5, 9.5 and 11.0

Calculate the solubility of NiCO3 in moles per liter and grams per liter (Ksp = 1.4 x 10-7)