what is the mechanism to get ornithine from glutamate-5-semialdehyde
In: Chemistry
How do metal salts affect catalase activity? Why are some metal salts considered to be activators and others are considered to be inhibitors? How do you know if a metal salt is an activator or inhibitor? For example, between K, Mg, Zn, Ca, and Fe, which metal salt would be the activator and which would be the inhibitor? How do you know?
In: Chemistry
Consider the following system at equilibrium where Delta H° =
108 kJ, and Kc =
1.29×10-2, at 600
K.
COCl2(g) <--->
CO(g)
+ Cl2(g)
If the VOLUME of the equilibrium system is
suddenly increased at constant
temperature:
| The value of Kc | A. increases. | |
| B. decreases. | ||
| C. remains the same. |
| The value of Qc | A. is greater than Kc. | |
| B. is equal to Kc. | ||
| C. is less than Kc. |
| The reaction must: | A. run in the forward direction to reestablish equilibrium. | |
| B. run in the reverse direction to reestablish equilibrium. | ||
| C. remain the same. It is already at equilibrium. |
| The number of moles of Cl2will: | A. increase. | |
| B. decrease. | ||
| C. remain the same. |
In: Chemistry
A) Calculate the mass defect of the oxygen nucleus 16 8O. The mass of neutral 16 8O is equal to 15.994914 atomic mass units. Answer in amu.
B) Calculate the binding energy E of the oxygen nucleus 16 8O (1eV=1.602×10−19J). Answer in MeV
C) Calculate the binding energy per nucleon of the oxygen nucleus 16 8O. Answer in MeV / nucleon
In: Chemistry
Why do we use kcat (also called turnover number) and not Vmax when we characterize the properties of an enzymecatalysed reaction?
Please explain to me in details. Thank you!
In: Chemistry
Complete the following paragraph to explain the relationship between nicotinic and muscarinic cholinergic receptors
In: Chemistry
|
Consider the titration of a 23.0 −mL sample of 0.180 M CH3NH2 with 0.145 M HBr. Determine each of the following. |
Part A the initial pH Express your answer using two decimal places.
SubmitMy AnswersGive Up Correct Part B the volume of added acid required to reach the equivalence point
SubmitMy AnswersGive Up Correct Part C the pH at 5.0 mL of added acid Express your answer using two decimal places.
Part D the pH at one-half of the equivalence point Express your answer using two decimal places.
Part E the pH at the equivalence point Express your answer using two decimal places.
Part F the pH after adding 5.0 mL of acid beyond the equivalence point Express your answer using two decimal places.
|
In: Chemistry
Draw the lewis structures of the polyatomic ions and assign formal changes of NH4+ and CO3 2-
In: Chemistry
Explain how metal ions can form part of the structure of enzymes, and also how it can contribute to catalysis
In: Chemistry
Make 0.3M from 1M stocks. Each measurement will require 3 ml of solution in a glass test tube
a) Glucose, 0.3 M
b) Ethanol, 0.3 M (Density = 0.789g/ml and 46.1g/mol)
c) Methanol, 0.3M (0.71g/ml and 34g/mol)
d) Isopropyl alcohol 70% (0.79g/ml and 60.1 g/mol)
In: Chemistry
For determination 1:
Initial concentration for H2C2O4: 0.31 mol/L
Initial concentration for KMnO4: 0.011 mol/L
Average elapsed time: 170 seconds
Reaction rate: ??? mol/L * s
Determination 2:
Initial concentration for H2C2O4: 0.63M
Initial concentration for KMnO4: 0.011
Average elapsed time: 97 seconds
Reaction rate: ??? mol/L * s
Determination 3:
Initial concentration for H2C2O4: 0.31
Initial concentration for KMnO4: 6.022 M
Average elapsed time: 189 seconds
Reaction rate: ??? mol/L * s
What is the order of reaction with respect to:
(a) H2C2O4: ???
Overall reaction order: ???
(b) KMnO4: ???
Calculate rate constant, k, for the reaction ???
Rate equation for the reaction??
Chemistry lab on determining the effect of reactant concentrations on the reaction rate. Please help me find the reaction rate and all the questions below. Please show work!
In: Chemistry
(a) Explain why there is no distinction between low- and high-spin arrangements for an octahedral d8 metal ion. (b) Discuss the factors that contribute to the preference for forming either a high- or a low-spin d 4 complex. (c) How would you distinguish experimentally between the two configurations in (b)?
In: Chemistry
Calculate the pH for each case in the titration of 50.0 mL of 0.200 M HClO(aq)0.200 M HClO(aq) with 0.200 M KOH(aq).0.200 M KOH(aq). Use the ionization constant for HClO.
What is the pH before addition of any KOH?
pH=
What is the pH after addition of 25.0 mL KOH?
pH=
What is the pH after addition of 35.0 mL KOH?
pH=
What is the pH after addition of 50.0 mL KOH?
pH=
What is the pH after addition of 60.0 mL KOH?
pH=
In: Chemistry
Sorbic acid (HC6H7O2) is a weak monoprotic acid with Ka=1.7×10−5. Its salt (potassium sorbate) is added to cheese to inhibit the formation of mold.
What is the pH of a solution containing 11.75 g of potassium sorbate in 1.70 L of solution?
In: Chemistry
If you used the simple distillation to separate cyclohexane and toluene, will it work? Why or Why not?
In: Chemistry