Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Chemistry Expert

Understanding of chemistry basics.

1. The relative concentrations of reactant and product found while a reaction reaches equilibrium reflects_____.
1. speed at which one compounded can be converted to another
2. whether or not an enzyme is present in the system.
3. the relative free energies of product and reactant
4. the degree to which a cell is in require of a particular substance
5. the difficulty of achieving the transition state between reactant and product

2. The amount of disorder in the universe tends to____
i. increase
ii. decrease
iii. remain the same.
iv. decrease until reaching a minimum and then remain the same
v. fluctuate

3. Which of the following is true of a reaction at equilibrium?
1. the reactant and product cease to react
2. the rate of the forward reaction equals the rate of the reverse reaction
3. the concentration of the substrate equals the concentration of the product.
4. the system has reached a state of minimum entropy.
5. the system is highly unstable.

4. 2- phosphoglycerate (2PG) has significantly more free energy than does 3- phosphoglycerate (3PG). A Scientist places equal amounts of the two compounds in solution with an enzyme that allows their inter conversion. At equilibrium he or she would observe a______
1. a solution of pure 2PG
2. a solution of pure 3PG
3. a mixture of primarily 2PG with a small amount of 3PG
4. a mixture of primarily 3PG with a small amount of 2PG

5. In the hypothetical chemical reaction A B, suppose the compound B has less energy than compound A. If the temperature at which the reaction takes place is raised from 100 C to 900C, the concentration of B at equilibrium will ______, and the length of time it take to achieve equilibrium will______.
i. decrease; decrease
ii. decrease; increase
iii. increase; decrease
iv. increase; increase
v. remain the same; remain the same

6. which of the following is not changed by the activity of an enzyme during a chemical reaction?
1. the activation energy of a reaction
2. the relative concentrations of reactant and product at equilibrium
3. the entropy of the universe
4. the precise conformation of either reactants or products
5. the speed at which the reaction takes place

7. Given the hypothetical chemical reaction, A B. The relative amounts of A and B at equilibrium are determined by their______, whereas the speed of the reaction is determined by the_______.
i. free energies; amount of energy it takes place to achieve the transition state
ii. free energies; relative free energies as well
iii. concentrations at the beginning of the reaction; free energy of the reactants
iv. concentration at the beginning of the reaction; free energy of the products

8. The rate of an enzymatic reaction is generally faster if the____
1. temperature of the solution is over 1000C
2. product has less energy than the reactant
3. energy of activation is low.
4. Concentration of both reactant and product are high
5. reaction takes place in a low pH solution

9. Enzymes function as catalysts by____.
i. changing the relative concentrations of reactant and product at equilibrium
ii. orienting substrates to improve the efficiency of reactions
iii. straining the bonds within the substrates
iv. permitting forward, but not reverse , reactions
v. b and c

10. Enzymes lower the activation energy of reactions by______.
a. straining the bonds within the substrates
b. coupling two reactions
c. permitting reactions to go in one direction only
d. raising the temperature of the reactants
e. b and c

Chemistry, Academics

  • Category:- Chemistry
  • Reference No.:- M918906

Have any Question? 


Related Questions in Chemistry

Determine the mass of glucose c6h12o6s needed to produce a

Determine the mass of glucose, C6H12O6(s), needed to produce a 0.150m glucose solution in 50.0mL of C2H5OH(l), density 0.789g/mL

How many seconds will be required to produce 10 g of

How many seconds will be required to produce 1.0 g of chromium metal by the electrolysis of a Cr(NO3)3 solution using a current of 3.0 A? Could someone please help me with the work for this.

Write a reserch paper on gas chromatographythis is a 10

Write a reserch paper on Gas chromatography. This is a 10 pages research paper that should include an introduction on chromatography, principles of separation, type of columns, resolution, detection methods and applicati ...

Balance the molecular equation for the following redox

Balance the molecular equation for the following redox reaction. What is the sum of the coefficients? Don't forget coefficients of one. Use the smallest whole number coefficients possible. H 2 SO 4 (aq) + HI(aq)I 2 (s) + ...

Identify the chemical components and the proportions

Identify the chemical components and the proportions necessary to achieve a buffer with the desired pH. Include relevant calculations in your answer.

A 187 g sample of mg reacts with 800 ml of a hydrochloric

A 1.87 g sample of Mg reacts with 80.0 mL of a hydrochloric acid solution (pH = -0.544). What is the pH of the solution after all the Mg has reacted? Assume constant volume.

Consider a string with a length of 545 cm tied at both end

Consider a string with a length of 54.5 cm tied at both end (like on a stringed instrument). If the frequency of the first harmonic on the string is 256 Hz, determine the speed of the wave in the string. Post your answer ...

Aluminum displaces cobalt from a 02 m solution of cobaltii

Aluminum displaces cobalt from a 0.2 M solution of cobalt(II) perchlorate. Cobalt does not displace chromium from a solution of 0.2 M chromium (III) nitrate. Aluminum metal does not displace calcium from a 0.2M solution ...

An ozone o3 sparger system has been proposed for a

An ozone, O 3 , sparger system has been proposed for a water-treatment plant. The incoming water in a 80 m3 pond has been stripped of all ozone-demanding substances, and the pH is sufficiently low such that the ozone dec ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro