For or an enzyme that obeys michaelis-menten kinetics, what is the reaction velocity, v, observed at the following substrate concentrations? express the result as a percentage of vmax.
a. If (S) = KM, then V/Vmax = ____%
b. If (S) = 2.00 KM, then V/Vmax = ____%
Answers
The answer to the given question is as follows:a. When the value of (S) equals KM, V/Vmax = 50%.b. When the value of (S) equals 2.00 KM, V/Vmax = 80%.
Michaelis-Menten Kinetics:Michaelis-Menten Kinetics describes the relationship between an enzyme's reaction velocity and substrate concentration. Michaelis-Menten Kinetics are governed by the following equation:
V = Vmax [S] / (KM + [S])
where [S] denotes substrate concentration and V denotes reaction velocity.
KM and Vmax are constants, with KM representing the Michaelis constant and Vmax representing the maximum reaction velocity.
Michaelis-Menten Kinetics obey the following laws:
• The enzyme reaction rate rises as substrate concentration rises.
• At high substrate concentrations, the rate of the enzyme reaction plateaus.
• The enzyme reaction rate increases linearly as substrate concentration rises at low substrate concentrations.
• The Michaelis constant is the substrate concentration that produces half of the maximum reaction velocity (Vmax/2).
The two parts of the question can be addressed as follows:a. If (S) = KM, then V/Vmax = 50%.b. If (S) = 2.00 KM, then V/Vmax = 80%.
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Related Questions
Which arrow would most likely represent the phase change that occurs when silver is poured into a mold and cools to become a solid bar?
Answers
Answer:
5
Explanation:
took test edge 2020
D. 5
got it correct on test <3
D. Answer the following questions in one word or a single sentence.
1. The metal foil used for wrapping food is made up of which metal
2. Which metal is used in thermometers?
3. Which non-metal is essential for breathing?
4. What is the alloy of iron, nickel and chromium known as?
5. Name the gas released when metals react with acids.
Answers
Answer:
According to the numbers 1-5;Aluminium,Mercury,Oxygen,Stainless Steel,Hydrogen gas.
Explanation:
What is the name for the compound BrCl?
Answers
Compound name:
Bromine chloride
Bond type:
Covalent Bond
Reasoning for Bond type:
Formed between nonmetal and nonmetal atoms
Br (Bromine) is a nonmetal. Also, known as a liquid.
Cl (Chlorine) is a nonmetal. Also, know as a gas.
Use this website for more element information:
https://ptable.com/#Properties
calculate the number of milliters of 0.634 m naoh required to precipitate as cr(oh)3 all of the cr3 ions in 159 ml of 0.531m cr2(so4)3 solution.
Answers
795 milliliters of 0.634 M NaOH solution are required to precipitate all of the Cr³⁺ ions in 159 ml of 0.531 M Cr₂(SO₄)₃ solution.
To calculate the number of milliliters of 0.634 M NaOH required to precipitate all of the Cr³⁺ ions in 159 ml of 0.531 M Cr₂(SO₄)₃ solution, we need to determine the stoichiometry of the reaction between Cr³⁺ ions and OH⁻ ions.
From the chemical equation, we know that one mole of Cr₂(SO₄)₃ produces two moles of Cr³⁺ ions. Therefore, the number of moles of Cr³⁺ ions in the 159 ml of 0.531 M Cr₂(SO₄)₃ solution can be calculated as follows:
Moles of Cr³⁺ ions = volume (L) × concentration (M) × stoichiometry
= 0.159 L × 0.531 mol/L × 2
= 0.168 mol
Since the reaction between Cr³⁺ ions and OH⁻ ions occurs in a 1:3 ratio, we need three times the number of moles of OH⁻ ions to precipitate all of the Cr³⁺ ions. Thus, the moles of NaOH required can be calculated as follows:
Moles of NaOH = 3 × moles of Cr³⁺ ions
= 3 × 0.168 mol
= 0.504 mol
Finally, we can calculate the volume of 0.634 M NaOH solution needed using the equation:
Volume of NaOH solution (L) = moles of NaOH / concentration of NaOH
= 0.504 mol / 0.634 mol/L
= 0.795 L
Volume of NaOH solution (mL) = 0.795 L × 1000
= 795 mL
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Which elements make up a water molecule?
COSMO
hydrogen and nitrogen
oxygen and nitrogen
oxygen and carbon
hydrogen and oxygen
Answers
Answer:
hydrogen and oxygen make up water molecules
Answer:
Oxygen and Nitrogen
Explanation:
because these two elements react very strongly
A single 250 gram
serving of one sports drink contains
0.055 grams of sodium ions. What is the
concentration of sodium ions expressed
as % by mass?
2.2 x 10-4
2.2 x 102
2.2 x 10-2
2.2 x 10-4
Answers
2.2 x 10^-2
0.055 / 250 = 0.00022 - This would be 2.2 x 10^-4, but the question is asking for percent, not proportion, so multiply by 100% to get the percentage.
0.00022 * 100% = 0.022% = 2.2 * 10^-2
If you have 500 ml of a 0.10 m solution of the acid, what mass of the corresponding sodium salt of the conjugate base do you need to make the buffer with a ph of 2.08 (assuming no change in volume)
Answers
The mass of the corresponding sodium salt of the conjugate base needed to make a buffer with a pH of 2.08.
To determine the mass of the corresponding sodium salt of the conjugate base needed to make a buffer with a pH of 2.08, you can follow these steps:
1. Identify the given information:
- Initial volume of acid solution: 500 mL
- Initial concentration of acid solution: 0.10 M
- Desired pH: 2.08
2. Use the Henderson-Hasselbalch equation:
pH = pKa + log ([conjugate base]/[acid])
3. Assuming the acid is a weak monoprotic acid (HA) and its conjugate base is A-, determine the pKa:
pKa = pH - log ([A-]/[HA])
4. Calculate the ratio of [A-] to [HA]:
[A-]/[HA] = 10^(pH-pKa)
5. Calculate the moles of HA in the 500 mL of 0.10 M solution:
moles of HA = (volume x concentration) = 500 mL x 0.10 mol/L = 0.050 mol
6. Calculate the moles of A- needed:
moles of A- = moles of HA x ([A-]/[HA]) ratio
7. Determine the molar mass of the sodium salt of the conjugate base (A-) using the molecular formula.
8. Calculate the mass of the sodium salt of the conjugate base:
mass = moles of A- x molar mass of A-
By following these steps, you will be able to determine the mass of the corresponding sodium salt of the conjugate base needed to make a buffer with a pH of 2.08.
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At standard pressure (760 mm) water boils at 100C. A vacuum pump is used to reduce the ambient pressure above water under a sealed bell jar. By reducing the pressure, the boiling point is lowered so that the water begins to boil at room temperature. What is the approximate pressure at which water boils at room temperature (22C)?
Answers
Answer:
601mmHg.
Explanation:
Step 1:
Data obtained from the question.
Initial pressure (P1) = 760mmHg
Initial temperature (T1) = 100°C = 100°C + 273 = 373K
Final temperature (T2) = 22°C = 22°C + 273 = 295K
Final pressure (P2) =..?
Step 2:
Determination of the new pressure at which the water will boil.
The new pressure on the at which the water will boil can be obtained as follow:
P1/T1 = P2/T2
760/373 = P2/295
Cross multiply to express in linear form
373 x P2 = 760 x 295
Divide both side by 373
P2 = (760 x 295) / 373
P2 = 601mmHg
Therefore, the new pressure at which the water will boil is approximately 601mmHg.
Answer:
C. 18-20 mm
Explanation:
The chemical signs and the meaning
Answers
Answer:
Flame: Flammable materials or substances liable to self ignite when exposed to water or air (pyrophoric), or which emit flammable gas.
Flame
Flame
Exclamation Mark: An immediate skin, eye or respiratory tract irritant, or narcotic.
Exclamation Mark
Exclamation Mark
Gas Cylinder: Gases stored under pressure, such as ammonia or liquid nitrogen.
Gas Cylinder
Gas Cylinder
Corrosion: Materials causing skin corrosion/burns or eye damage on contact, or that are corrosive to metals.
Corrosion
Corrosion
Exploding Bomb: Explosives, including organic peroxides and highly unstable material at risk of exploding even without exposure to air (self-reactives).
Exploding Bomb
Exploding Bomb
Flame Over Circle: Identifies oxidizers. Oxidizers are chemicals that facilitate burning or make fires burn hotter and longer.
Flame Over Circle
Flame Over Circle
Skull and Crossbones: Substances, such as poisons and highly concentrated acids, which have an immediate and severe toxic effect (acute toxicity).
Skull and Crossbones
Skull and Crossbones
Environmental Hazard: Chemicals toxic to aquatic wildlife. (Non-Mandatory)
Explanation:
What is the pH of a solution that has the same number of hydrogen ions as hydroxide ions?
0
1
7
14
Answers
Answer:7
Explanation:
Answer:
its c
Explanation:
What causes the differences in physical characteristics like hair color among people?
ООО
different versions of genes
O variations in DNA length
different numbers of chromosomes
variations in cell nucleus size
Answers
Answer:
The answer is a
Explanation:
Test
Active
TIME REMAINING
01:44:31
11
12
18
20
Which planets are terrestrial? Select three options.
Jupiter
Mars
Mercury
Uranus
Venus
Mark this and retum
Save and Exit
Nex
Answers
Answer:
mercury, mars, venus
Explanation:
Suppose you add 2.4x10^-3 moles of HNO3 to enough water to make 792 mL of solution What is the pH of the solution?
URGENT
Answers
2.4 x 10^-3 moles HNO3 / 0.792 L solution = 0.00303 M HNO3
Since HNO3 is a strong acid, it will dissociate completely in solution to form H+ and NO3- ions. Therefore, the concentration of H+ ions in the solution is also 0.00303 M.
To find the pH of the solution, we can use the formula:
pH = -log[H+]
pH = -log(0.00303)
pH = 2.52
Therefore, the pH of the solution is 2.52.
Consider the reaction below.
2 POCl3(g) ---> 2PCl3(g) + O2(g)
(a) Calculate ΔG° for thisreaction. The ΔGf° values forPOCl3(g) and PCl3(g) are−502 kJ/mol and −270. kJ/mol, respectively.
Answers
The ΔG° for the reaction 2 POCl3(g) → 2 PCl3(g) + O2(g) is -540 kJ/mol, based on the given ΔGf° values of -502 kJ/mol for POCl3(g) and -270 kJ/mol for PCl3(g).
To calculate the standard Gibbs free energy change (ΔG°) for the given reaction, we need to use the ΔGf° (standard Gibbs free energy of formation) values for the reactants and products involved.
The reaction can be divided into two steps:Step 1: Formation of 2 PCl3(g)
Step 2: Formation of 1 O2(g) . ΔGf° for POCl3(g) = -502 kJ/mol
ΔGf° for PCl3(g) = -270 kJ/mol
Since the reaction coefficients are balanced, we can directly use the ΔGf° values to calculate ΔG°. Step 1: 2 POCl3(g) → 2 PCl3(g)
ΔG° = (2 mol PCl3) × ΔGf°(PCl3)
= 2 × (-270 kJ/mol)
= -540 kJ
Step 2: 0 O2(g) → 1 O2(g)
ΔG° = ΔGf°(O2)
= -0 kJ/mol (since O2 is in its standard state)
Now we can calculate the overall ΔG° for the reaction by summing up the ΔG° values for each step:ΔG°(reaction) = ΔG°(step 1) + ΔG°(step 2)
= -540 kJ + (-0 kJ)
= -540 kJ . Therefore, the ΔG° for the given reaction is -540 kJ.
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Some viruses attack cells by attaching to their outer covering entering and taking over their genetic machinery.viruses are able to invade cells after first attaching to their
Answers
A chemist uses 0.25 l of 2.00 m h2so4 to completely neutralize a 2.00 l of solution of naoh. the balanced chemical equation of the reaction is given below. 2naoh h2so4 right arrow. na2so4 2h2o what is the concentration of naoh that is used?
Answers
The concentration of NaOH that is used to completely neutralize is 0.25 Liters.
How do we calculate concentration?We will calculate the concentration in terms of molarity by using the below formula:
M₁V₁ = M₂V₂, where
M₁ = molarity of H₂SO₄ = 2m
V₁ = volume of H₂SO₄ = 0.25 L
M₂ = molarity of NaOH = ?
V₂ = volume of NaOH = 2 L
On putting all these values on the above equation, we get
M₂ = (2)(0.25) / (2) = 0.25 L
Hence required volume is 0.25 L.
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explain how modern synthesis techniques can improve medicines, both in qualitative and quantitative aspects, obtained from natural sources
Answers
Over the past century, advances in synthetic chemistry have made it possible to find numerous ground-breaking treatments that have benefited human health. To find the next generation of medications in the face of growing hurdles in the pharmaceutical industry, chemistry innovation must continue.
Generally speaking, there are two forms of modern drug synthesis:
1) Chemical synthesis - Through the use of chemical reactions. There is always a large-scale manufacture of medicines as a result of the chemical reaction. For medicinal synthesis, careful attention to detail at each stage is important.
2) Bioprocessing synthesis: In this method, bacteria are employed to create medicines. The ability of microbe cell walls to make beneficial products from them is the basic foundation of it.
Drug manufacture is an expensive and time-consuming process because of the moral dilemmas surrounding in vivo models and the scanty outcomes. The pharmaceutical industry is now making efforts that have been successful in developing and refining novel drug-delivery systems.
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6 Calculate the number of molecules in 8 g of oxygen.
Answers
Answer:
If you mean the number of atoms in 8g of oxygen, it's 3.011 x 10^23 atoms.
Explanation:
Convert the grams to moles. 8 grams of oxygen is 0.5 moles. Then multiply the number of moles by Avogadro's number: 6.022 x 10^23.
Consider an iron–carbon alloy that contains 0. 2 wt% c, in which all the carbon atoms reside in tetrahedral interstitial sites. Compute the fraction of these sites that are occupied by carbon atoms.
Answers
To compute the fraction of tetrahedral interstitial sites occupied by carbon atoms in an iron-carbon alloy with 0.2 wt% carbon, we need to convert the weight percentage of carbon to a molar concentration and then relate it to the number of available interstitial sites.
The molar mass of carbon (C) is 12.01 g/mol. Assuming a total of 100 grams of the alloy, the weight of carbon is 0.2 grams (0.2 wt% of 100 grams). Converting this weight to moles using the molar mass, we have:
Number of moles of carbon = (0.2 g) / (12.01 g/mol) ≈ 0.0167 mol
Since each carbon atom occupies a tetrahedral interstitial site, the number of occupied sites is equal to the number of carbon atoms. The Avogadro's number (6.022 x 10^23) represents the number of entities (atoms or molecules) in one mole of a substance. Therefore, the fraction of occupied sites is given by:
Fraction of occupied sites = (Number of occupied sites) / (Total number of sites)
To determine the total number of tetrahedral interstitial sites, we need to know the crystal structure of the alloy and the arrangement of the iron atoms. Without this information, it is not possible to provide an accurate calculation of the fraction of occupied sites.
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When water pours over a waterfall?
Answers
True or False. If a fire destroyed all of the grass in a grassland, this would NOT affect the biodiversity of this ecosystem.
Answers
Answer:
This is false
Answer:
100% false
Explanation:
common sense
Which of the following should you study for a career in the legal field? Select the two that
apply.
government
math
science
speech and debate
Answers
Answer:
answer is D
Explanation:
Why do the changes to the mass of the star affect the orbital path of earth?
Answers
The changes to the mass of the star affect the orbital path of the earth because the sun exerts a gravitational force on the planet.
What is the meaning of the gravitational forces on a celestial body?The meaning of the gravitational forces on a celestial body is based on the forces that attract celestial bodies such as in this case occurs with the sun that attracts the earth planet.
Therefore, with this data, we can see that the meaning of the gravitational forces on a celestial body is associated with attractive forces.
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What is the mass of one liter of liquid in grams, if the density of liquid
is 13.6 g/cm3?
Answers
Answer:
m = 13.6 kg
Explanation:
Given that,
Volume, V = 1 L
The density of the liquid is, d = 13.6 g/cm³
We know that, 1 L = 1000 cm³
The formula of density is given by :
Density=mass/volume
\(m=d\times V\\\\m=13.6\ g/cm^3\times 1000\ cm^3\\\\m=13600\ g\\\\\text{or}\\m=13.6\ kg\)
So, the mass of liquid is 13.6 kg.
Question 16 of 30
The graph below shows how the temperature and volume of a gas vary when
the number of moles and the pressure of the gas are held constant. What
happens to the temperature of a gas as its volume increases?
A. The temperature decreases.
OB. The temperature doubles.
OC. The temperature increases.
D. The temperature remains the same.
Answers
The temperature of a gas as the volume of the gas increases and the temperature also rises.
Explain about the pressure?A location inside a gas experiences pressure in all directions. The pressure force at a gas' surface acts perpendicular to the surface. If the gas is moving overall, the measured pressure will differ according to the motion's direction.
The force that is dispersed over a unit area per time perpendicular to an object's surface.
Pressure is the term for the physical force that is exerted on an object. The force is applied perpendicularly to the objects' surfaces per unit area. F/A is the basic formula for pressure (Force per unit area). Pressure is measured in Pascals (Pa). There are four distinct types of pressure: gauge, absolute, ambient, and differential.
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How many moles of C2H3N022- would you need to prepare a buffer solution with C2H4NO2 that has a pH = 9.85? O 1.17 O 0.85 0.068 O 0.07
Answers
The number of moles of C₂H₃NO₂⁻ you would need to prepare a buffer solution with 1 mol C₂H₄NO₂ that has a pH = 9.85 is 1.17 moles of C₂H₃NO₂⁻.
A buffer solution is a solution that is resistant to pH changes on the addition of acid or base. For a buffer solution to be prepared, an acid and its salt, or a base and its salt, must be mixed. These chemicals should be present in approximately equal molar amounts. The pH of a buffer solution is determined by the pKa of the acid utilized to make the buffer.
To prepare a buffer solution with a pH of 9.85 using C₂H₃NO₂⁻ and C₂H₄NO₂, you need to use the Henderson-Hasselbalch equation:
pH = pKa + log ([A-]/[HA])
First, find the pKa of C₂H₄NO₂ (glycine), which is 9.78.
Now, plug in the values:
9.85 = 9.78 + log ([C₂H₃NO₂⁻]/[C₂H₄NO₂])
Rearrange the equation to solve for the ratio of [C₂H₃NO₂⁻]/[C₂H₄NO₂]:
0.07 = log ([C₂H₃NO₂⁻]/[C₂H₄NO₂])
Using the antilog, find the ratio:
10^0.07 = [C₂H₃NO₂⁻]/[C₂H₄NO₂] ≈ 1.17
So, you would need a ratio of 1.17 moles of C₂H₃NO₂⁻ for each mole of C₂H₄NO₂ to prepare a buffer solution with a pH of 9.85.
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(WILL GIVE BRAINLIEST TO BEST ANSWER) What might a weak acid do to a rock?
Answers
When water combines with carbon dioxide in the atmosphere, it will form carbonic acid, which is a weak acid. If this weak acid comes in contact with a rock, it will cause some of the rock to be dissolved. This process can also be referred to as weathering.
Question 11
Which formula represents a hydrocarbon?
C₂H6
C₂H5OH
C₂H5Cl
C₂H6O
Answers
Answer:
C₂H6
Explanation:
Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A
A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:
A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.
B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.
C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.
D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.
Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.
In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A
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Is it coating iron pipe with Zinc or connecting a zinc rod to a
iron pipe, which is advantageous to protect the Fe surface from
undergoing corrosion? Justify the answer
Answers
Connecting a zinc rod to an iron pipe offers advantages in protecting the iron surface from corrosion. The zinc acts as a sacrificial anode, corroding in place of the iron and providing uniform and extended protection to the entire iron pipe.
Connecting a zinc rod to an iron pipe is advantageous to protect the iron (Fe) surface from undergoing corrosion. This process is known as cathodic protection, where the zinc acts as a sacrificial anode. Here's the justification for this answer:
Galvanic Protection: When a zinc rod is connected to an iron pipe, it creates a galvanic cell. Zinc is more reactive than iron, so it acts as the anode, sacrificing itself to protect the iron pipe (cathode). The zinc corrodes instead of the iron, thereby providing protection to the iron surface.Sacrificial Anode: Zinc has a higher electrochemical potential than iron, making it more susceptible to corrosion. This means that zinc will preferentially corrode instead of the iron pipe. By connecting a zinc rod, the zinc sacrificially corrodes, protecting the iron from corrosion. Uniform Protection: Connecting a zinc rod provides uniform protection to the entire iron pipe surface. As long as the zinc rod is in contact with the iron pipe, it will continuously provide cathodic protection along the entire length of the pipe. Extended Protection: The sacrificial zinc anode can provide protection for an extended period before it gets fully consumed. Once the zinc is depleted, it can be replaced with a new zinc rod to continue the protection.Read more on corrosion here: https://brainly.com/question/489228
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All of the following scientists contributed to the field of nuclear chemistry EXCEPT
Ernest Rutherford
Niels Bohr
Henri Becquerel
Marie Curie
NEED HELP asap
Answers
Answer:Bohr
Explanation: