1,699 Answered Questions for the topic biochemistry

Biochemistry Biology

02/11/19

The two individual strands of a double helix of DNA are held together by (note: adenine = A; cytosine = C; thymine = T; guanine = G)
A. Two hydrogen bonds between A and T, and three hydrogen bonds between C and GB. Three hydrogen bonds between A and C, and three hydrogen bonds between T and GC. Two hydrogen bonds between A and... more
Follows • 1
Expert Answers •1

12/19/18

How do I memorize a whole chemistry book for a big test?
I am studying in high school to be a doctor.Now I have lots of big tests for every subject I have, but my main concern is the big chemistry test in five months, which will set my last grade for the... more
Follows • 1
Expert Answers •1
Biochemistry Organic Chemistry Chem

12/10/18

C12H22O11(aq)+H2O(g)->4C2H5OH(l)+4CO2(g) Find the theoretical yield and the percent yields of ethanol if 680.g sucrose undergoes fermentation and 303.5g ethanol is obtained.
Follows • 1
Expert Answers •1

12/09/18

Chemistry Homework Help
An NaoH solution was prepared by diluting 3.00 mL of a 20.0 M NaOH stock solution to a final volume of 500 mL. What is the molarity of the new solution?
Follows • 0
Expert Answers •1

12/05/18

CHEMISTRY QUESTION

I've tried this question again and again but my solution is incorrect... can someone pls help me?What amount of thermal energy (in kJ) is required to convert 40.7 g of ethanol at -158 °C completely... more
Follows • 1
Expert Answers •1

11/30/18

Equilibrium help

the reactions for 1 and 2 below, take place at 20°C, and answer the following questions.1) H​2S​ O​3(​ g) ⟶ SO​2(​ g) + H​2​O(g) △Go​ ​ = +25kJ mol-​ 12) H​2(​ g) + Cl​2(​ g) ⟶ 2 HCl(g) △Go​ ​ =... more
Follows • 1
Expert Answers •1

11/30/18

What is the molecular geometry and why?

XeCl​2​ , ICl​3​ , TeF​4​ , PCl​5what is the molecular geometry of these and why
Follows • 1
Expert Answers •1

11/28/18

I need help on finding the initial equilibrium concentrations

A+2B=3cthe reaction mixture is samples prior to the equilibrium being reached. It is determined that the reaction must proceed to the left for equilibrium to be reached. When the reaction mixer is... more
Follows • 1
Expert Answers •1

11/28/18

How to find initial concentration
A+2B=3cthe reaction mixture is samples prior to the equilibrium being reached. It is determined that the reaction must proceed to the left for equilibrium to be reached. When the reaction mixer is... more
Follows • 1
Expert Answers •1

11/28/18

What is the equilibrium constant

A + 2B =3C if the equilibrium concentrations are A=0.413M B=0.414M C= 0.228. What is the equilibrium constant
Follows • 1
Expert Answers •1
Biochemistry Chemistry

11/28/18

Ph of hcl using molarity

HCl has a concentration of 4.0x10-3mol L-1 what is the pH of this
Follows • 1
Expert Answers •1
Biochemistry Chemistry

11/28/18

Ph question acid dissociation

The acid dissociation of CH3COOH is 1.74x 10-5mol L-1 use this to find the ph of 0.25mol L-1
Follows • 1
Expert Answers •1

11/28/18

Rate question of decomposition

Decomposition of H2O2 was observed for several days. Initially the H2O2 was present at 0.50mol L-1 after 2 days the H2O2 was 0.25mol L-1 what is the rate of this reaction
Follows • 1
Expert Answers •1

11/28/18

Entropy change question help
N2+3H2=2NH3 is an equilibrium reaction and is 7.07x10-4 mol L-1 at 623k.given that the enthalpy of the reaction is -92kjmole-1 what is the entropy change at this temperature. Note R= 8.134J k-1mol-1
Follows • 1
Expert Answers •1

11/25/18

I've a problem with ranking compounds
thank you for taking some time for this, these two questions i dont get:arrange the following bonds in order of polarity, from the least polar to the most polar: H-H, O-H, Cl-H, S-H, and F-HRank... more
Follows • 1
Expert Answers •1

11/22/18

What changed rate of reaction?
. Which of the following changes is likely to ​DECREASE​​ the rate of a reaction?A. increasing the activation energyB. increasing the concentration of reactants C. increasing the temperatureD.... more
Follows • 2
Expert Answers •1

11/22/18

Equilibrium constant

Consider the reactions 5a and 5b, below, taking place at 25 °C, and answer the following questions.5a H​2S​ O​3(​ g) ⟶ SO​2(​ g) + H​2​O(g) △Go​ ​ = +10 kJ mol-​ 15b H​2(​ g) + Cl​2(​ g) ⟶ 2 HCl(g)... more
Follows • 2
Expert Answers •1

11/22/18

What is the molecular structure of these and why?
XeCl​2​ , ICl​3​ , TeF​4​ , PCl​5what is the molecular structure of these and why?
Follows • 1
Expert Answers •1
Biochemistry Chemistry

11/22/18

pH value from pka

Calculate the pH for a solution of 0.15 M CH​3C​ OOH, given that the p​K​a​ for the acid is 4.75.
Follows • 2
Expert Answers •1

11/22/18

Enthalpy question

The heats of formation of CH​4(​ g), H​2O​ (g) and CO(g) are -890.4 kJ mol-​ 1​, -241.8 kJ mol-​ 1 and -110.5 kJ mol-​ 1​ respectively. Determine the enthalpy change for the reaction and state... more
Follows • 2
Expert Answers •1

11/22/18

Equilibrium.... shift of equilibrium

Oxygen can be converted to ozone (O​3)​ in the following reaction:3 O​2(​ g) + heat ⇌ 2 O​3​(g)All of the following changes at equilibrium will shift the reaction to products except:A. adding O​2​... more
Follows • 1
Expert Answers •1
Biochemistry Chemistry Enthalpy

11/22/18

Enthalpy change

In gluconeogenesis, glucose can be produced by reaction of pyruvic acid and glycerol. Upon consideration of the simplified version of this reaction, as shown below, and making use of the data in... more
Follows • 2
Expert Answers •1
Biochemistry Chemistry

11/16/18

please turn the verbal sentence(s) into an expression.
The sum of two numbers is 6. The second number is three times greater than the first number.
Follows • 1
Expert Answers •1

08/27/18

How to make a buffer?
So I have to make a 0.02 M Sodium Phosphate buffer @ pH of 7, easy enough I use monosodium and disodium phosphate as the acid and base, I used the henderson hasselbach equation. But now I have to... more
Follows • 2
Expert Answers •1

08/27/18

What is the Main Energy Processing System in PLANTS?
Basically a Bioenergetic Question. Choose one of the Ans. That you think is the right one. A. PHOTOSYNTHESIS B. RESPIRATION C. MITOCHONDRIA D. BOTH A&B   THANKS FOR THE HELP!
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.