1,708 Answered Questions for the topic biochemistry

07/20/20

8. NEED HELP FAST

For a particular redox reaction,  BrO−  is oxidized to  BrO−3  and  Cu2+  is reduced to  Cu+ . Complete and balance the equation for this reaction in basic solution. Phases are optional.balanced... more
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07/20/20

7. NEED HELP FAST

Complete and balance the reaction in acidic solution.equation:ZnS + NO_{3}^{-} -> Zn^{2+} + S + NO Which element is oxidized?Which element is reduced?Which species is the oxidizing agent?Which... more
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07/20/20

4. NEED HELP FAST

For the oxidation–reduction reaction equation2Na+S⟶Na2S indicate how many electrons are transferred in the formation of one formula unit of product.electrons:
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07/20/20

10. NEED HELP FAST

A  20.574  g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with  71.827  g of water. A  10.093  g aliquot of this solution is then titrated... more
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07/20/20

15. NEED HELP FAST

Given the informationA+B⟶2D Δ𝐻∘ =-677.5kJ Δ𝑆∘= 370.0 J/K C⟶D Δ𝐻∘ = 509.0kJ Δ𝑆∘=-243.0 J/K calculate  Δ𝐺∘  at 298 K for the reactionA+B⟶2C Δ𝐺∘=
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Biochemistry

07/19/20

Which of the following factor does not affect an enzyme's activity and why?
a. colorb. temperaturec. concentrationd. pH
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07/16/20

9. NEED HELP FAST

An aqueous solution at  25 ∘C  is  7.53%  LiOH by mass and has a density of  1.091  g/mL.What is the pH?pH=
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07/16/20

13. NEED HELP FAST

Calculate the pH of a  0.123 M  solution of  NaNO2.  The ionization constant,  𝐾a,  for the acid,  HNO2,  is  4.60×10−4. pH=
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07/16/20

19. NEED HELP FAST

A volume of  500.0 mL  of  0.100 M   NaOH  is added to  535 mL  of  0.200 M  weak acid  (𝐾a=2.96×10−5).  What is the  pH  of the resulting buffer?HA(aq)+OH−(aq)⟶H2O(l)+A−(aq) pH=
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07/16/20

20. NEED HELP FAST

The  p𝐾a  of hypochlorous acid is  7.530 . A  52.0  mL solution of  0.145  M sodium hypochlorite ( NaOCl ) is titrated with  0.321  M  HCl .Calculate the pH of the solution after the addition... more
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Biochemistry

07/16/20

My question is based on Biochemistry
20) Binding of oxygen to Fe2+ of heme group leads to  a Flattening of Heme b Increased binding of DPG c Formation of salt bridges d All options are true 19) Smokers are known to have an... more
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07/15/20

5. NEED HELP FAST!!!

The reactionC4H8(g)⟶2C2H4(g)has an activation energy of  262 kJ/mol.  At  600.0 K,  the rate constant,  𝑘,  is  6.1×10−8 s−1.  What is the value of the rate constant at  790.0 K?
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07/14/20

NEED HELP FAST!!!!

The reactionC4H8(g)⟶2C2H4(g) has an activation energy of  262 kJ/mol.  At  600.0 K,  the rate constant,  𝑘,  is  6.1×10−8 s−1.  What is the value of the rate constant at  790.0 K?
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07/13/20

NEED HELP FAST!!!!

The reaction C4H8(g)⟶2C2H4(g)has an activation energy of 262 kJ/mol. At 600.0 K, the rate constant, 𝑘, is 6.1×10−8 s−1. What is the value of the rate constant at 790.0 K?
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07/13/20

NEED HELP FAST!!!
For A⟶products, time and concentration data were collected and plotted as shown. [𝐀] (𝐌)𝐭 (𝐬) 0.600 00.0 0.484 30.0 0.405 60.0 0.349 90.0 Determine the reaction order, the rate... more
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07/13/20

NEED HELP FAST!!!!

Consider the given reaction.A(aq)+B(s)↽−−⇀C(aq)𝐾=9.40Suppose  13.7 mol A  reacts with excess  B  in  5.90 L  of solution. Calculate the concentration of  C  at equilibrium.
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07/13/20

NEED HELP FAST!!!!

For  A⟶products , time and concentration data were collected and plotted as shown.[𝐀] (𝐌)  𝐭 (𝐬) 0.600  00.0 0.484  30.0 0.405  60.0 0.349  90.0 A plot of the concentration of A versus time is... more
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07/13/20

NEED HELP FAST!!!

The reactionC4H8(g)⟶2C2H4(g) has an activation energy of  262 kJ/mol.  At  600.0 K,  the rate constant,  𝑘,  is  6.1×10−8 s−1.  What is the value of the rate constant at  790.0 K?
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07/13/20

NEED HELP FAST!!!

Consider the given reaction.A(aq)+B(s)↽−−⇀C(aq)𝐾=9.40 Suppose  13.7 mol A  reacts with excess  B  in  5.90 L  of solution. Calculate the concentration of  C  at equilibrium.
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07/13/20

NEED HELP FAST!!

At a certain temperature,  0.760 mol SO3  is placed in a  4.50 L  container.2SO3(g)↽−−⇀2SO2(g)+O2(g) At equilibrium,  0.160 mol O2  is present. Calculate  𝐾c.
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07/13/20

NEED HELP FAST!!!

The rate constant for this first‑order reaction is  0.0660 s−1  at  400 ∘C. A⟶products After how many seconds will  17.4%  of the reactant remain?
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Biochemistry

06/30/20

Which of the following protein structure has a lowest energy
amyloid  native (folded) structure  unfolded structure aggregates
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Biochemistry

06/30/20

Which of the following are related the entropy changes in protein folding (U --> N)

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Biochemistry Science Biology Act Science

06/18/20

Pressure of oxygen
If the partial pressure of oxygen is the same at the top of Mount Everest (elevation above sea level 8848m) as Toronto (elevation above sea level 76m), why is it so much harder (and dangerous) to... more
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Biochemistry

06/09/20

Gytis DNA molecule
Describe the structure of a DNA molecule, including how individual constituents bind to each other along a length of DNA, and how two DNA strands interact with each other.
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