What is the net charge at ph 7. 0 on a peptide with the sequence? ala-thr-leu-asp-ala-lys-pro-glu.
Answers
the net charge on the given peptide can be calculated as follows:Ala (neutral) + Thr (neutral) + Leu (neutral) + Asp (negative) + Ala (neutral) + Lys (positive) + Pro (neutral) + Glu (negative) = -1Therefore, the net charge on the given peptide at pH 7.0 is -1.
The net charge at pH 7.0 on a peptide with the sequence ala-thr-leu-asp-ala-lys-pro-glu is -1. Peptides are short chains of amino acids. The charge on a peptide can be calculated by summing the charges on its constituent amino acids and adjusting for the pH of the solution. At pH 7.0, some amino acids have a positive charge (arginine, histidine, and lysine) while others have a negative charge (aspartate and glutamate). The remaining amino acids (alanine, threonine, leucine, and proline) are neutral. Therefore, the net charge on the given peptide can be calculated as follows:Ala (neutral) + Thr (neutral) + Leu (neutral) + Asp (negative) + Ala (neutral) + Lys (positive) + Pro (neutral) + Glu (negative) = -1Therefore, the net charge on the given peptide at pH 7.0 is -1.
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Related Questions
Which of the following is an example of a substance changing its state of matter?
Crumpling paper
Ink added to water
Breaking a chair into pieces
Water collecting on a cold glass
Answers
Breaking a chair into pieces is an example of a substance changing its state of matter ,therefore option (c) is correct.
What do you mean by the states of matter ?There are three state of matter which includes solid, liquid and gases.
A solid is, in most cases, rigid and holds a definite shape. Solids do not change shape at room temperature. They retain the same shape.
A liquid typically flows and, when inside a contained, takes its shape, although the upper surface remains flat or slightly curved.
Gases do not have any definite shape nor have any specific volume. Gases fill the entire space available to them. They can be compressed under pressure.
Breaking a chair into pieces is an example of a substance changing its state of matter ,hence option (c) is correct.
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Answer:
Its (D) Water collecting on a cold glass
Explanation:
Got it right on my quiz.
Condensation, in this case the water vapor turns into a liquid causing a change of its state of mater.
When is electrolysis used to extract metal?
Answers
Answer:
Explanation:
electrolysis is the technique that use direct current to drive a non spontaneous chemical reaction chemical reaction is the gain or lose of electron this technique is use to extract metal from theirs ores
If the temperature of a gas in a container is doubled on the Kelvin scale, what will happen to the pressure of the gas?
Answers
Explanation:
Pressure and temperature will both increase or decrease simultaneously as long as the volume is held constant. If temperature were to double the pressure would likewise double.
Classify as physical property or chemical property: Length of metal objects
A. Physical Property
B. Chemical Property
Answers
Answer:
A.Physical property
Explanation:
Physical properties such as mass,volume,density and colour can be observed without changing the identity of that matter.Examples of extensive properties include mass,volume and length.
the temperature of the filament of an incandescent lightbulb is 2840 k. use the blackbody radiation functions table. given: (λt)maxpower = 2897.8 µm·k
Answers
The wavelength at which the incandescent lightbulb's filament emits maximum power is approximately 1.020 µm. If the temperature of the filament of an incandescent lightbulb is 2840 k.
To find the wavelength at which the incandescent lightbulb's filament emits maximum power, we will use Wien's Displacement Law, which is represented by the formula
(λT)maxpower = 2897.8 µm·K.
In this problem, we are given the temperature of the filament (T) as 2840 K, and we need to find the wavelength (λ) that corresponds to the maximum power emission.
Using Wien's Displacement Law formula, we can solve for λ:
(λT)maxpower = 2897.8 µm·K
To find λ, we simply divide the constant (2897.8 µm·K) by the given temperature (2840 K):
λ = (2897.8 µm·K) / (2840 K)
λ ≈ 1.020 µm
The wavelength at which the incandescent lightbulb's filament emits maximum power is approximately 1.020 µm.
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Why does the carbon anode burn away in the electrolysis of aluminium chloride?
Answers
Typically, when two atoms form a chemical bond, the expected result is that the electrons.
Answers
When atoms form chemical bonding then the atoms attain Noble gas configuration.
Noble gas configuration of an atom includes the fundamental image of the ultimate noble fueloline previous to that atom, observed via way of means of the configuration of the ultimate electrons.so for sodium, we make the substitution of [Ne] for the 1s22s22p6 a part of the configuration. Sodium's noble fueloline configuration becomes [Ne]3s1.
Covalent bonds, atoms percentage pairs of electrons, at the same time as in ionic bonds, electrons are absolutely transferred among atoms in order that ions are formed.During the formation of a chemical bond, the predicted end result is that the electrons will whole a noble fueloline configuration in each atoms. Typically, while atoms shape a chemical bond, the predicted end result is that the electrons.
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what is the bond formed between N and Br
A) non-polar covalent
B) Polar Covalent
C) Ionic
Answers
Answer:
Bond between N and Br is non polar bond
Nitrogen being the element of group 15 , it required only 3 electrons to complete it's octace and BR, element of group 17 requires only one electron to complete it's octace both nitrogen and br share their electrons as for forming ionic bond it requires too much energy for nitrogen to remove 3 electrons also here, valency of br is only one. both are non metal so they formed covalent bond.Given 1 in=2.54 cm, how many centimeters are in an average hand (9.50 inches) __ cm (3 significant figures)
Answers
Answer:
9.5 inches = 24.1 cm
Explanation:
Given that,
1 inch = 2.54 cm
We need covert 9.5 inches to cm. For this we will use unitary method. To convert 9.5 inches to cm multiply 2.54 and 9.5. So,
9.5 inches = (2.54 × 9.5) cm
9.5 inches = 24.13 cm
or
9.5 inches = 24.1 cm
Hence, this is the required solution.
Why is water used as a solvent in many solutions?
A Water dissolves other water molecules.
B Water dissolves any chemical.
C Water dissolves nonpar molecules.
D Water dissolves polar molecules.
O A
OB
O C
O D
Answers
explanation: because use nonpartisan molecules
The chemical equation below shows the amount of the reactants used and the amount of only one of the products formed. How much water (H2O) should be formed in this chemical reaction? CH4 mass 4 + 2O2 mass 16 CO2 11 + 2h2O mass ?
Answers
Answer:
CH4 + 2O2 → CO2 + 2H2O
Explanation:
This is all i could come up with im sorry.
The amount of water formed in the given chemical reaction is 9 grams.
What is Stoichiometry?Stoichiometry is the calculation for the determination of the relative amount of reactants and products in chemical reactions. Stoichiometry is based on the law of conservation of mass where the total mass of the reactants in reaction equals the total mass of the products.
If the quantity of one reactant is known and the quantity of the product can be determined empirically, then the quantity of the other reactants can be calculated.
Given chemical equation is:
CH₄ + 2O₂ \(\longrightarrow\) CO₂ + 2H₂O
16g 32g 44g 32g (from their molecular masses)
The amount of methane, oxygen, and carbon dioxide is 4g, 16g, and 32 g respectively.
16g of methane react with oxygen = 32g
4g of methane will react with oxygen = 8g
It means here methane is the limiting reagent as the given amount of oxygen is more than reacted one. So CH₄ will decide the amount of water.
16g of methane produces water = 32g
Then 4g of methane will produce water = (32/16) × 4 = 9 g
Therefore, 9 grams of water should be formed in this reaction.
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What pillar of sustainability is broken by recycling
electronics in India? Should the US make a law that electronics can
only be recycled in the US?
Answers
The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.
Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.
However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.
Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.
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How do the claims in drug ads impact the medical profession in 4 sentence
Answers
Answer:
But drug advertising is not all about deception. It can offer helpful information if you know what to look for. "Advertisements can offer information on drugs that may help many older men, especially those who have conditions that may be tough to treat or manage, such as diabetes and hypertension,"
What is the maximum number of electrons in an atom that can have the following quantum numbers? Specify the orbitals in which the electrons would be found. (a) n = 2, ms = +1 2; (b) n = 4, mℓ = +1; (c) n = 3, ℓ = 2; (d) n = 2, ℓ = 0, ms = −1 2; (e) n = 4, ℓ = 3, mℓ = −2.
Answers
Answer:
1.04
Explanation:
Use the formula to answer the following question4Li + Pb(SO4)2->2Li₂SO4 + PbHow many moles of Pb(SO4)2 are needed to produce 330 g Li₂SO4?
Answers
ANSWER
The number of moles of Pb(SO4)2 is 1.5 moles
EXPLANATION
Given that;
The mass of Li2SO4 is 330g
Follow the steps below to find the moles of Pb(SO4)2
Step 1; Write the balanced equation of the reaction
\(\text{ 4Li + Pb\lparen SO}_4)_2\rightarrow\text{ 2Li}_2SO_4\text{ + Pb}\)Step 2; Find the number of moles of Li2SO4 using the below formula
\(\text{ Mole = }\frac{\text{ mass}}{\text{ molar mass}}\)Recall, that the molar mass of Li2SO4 is 109.94 g/mol
\(\begin{gathered} \text{ mole = }\frac{\text{ 330}}{\text{ 109.94}} \\ \text{ mole = 3.00 moles} \end{gathered}\)The number of moles of Li2SO4 is 3.00 moles
Step 3; Find the number of moles of Pb(SO4)2 using a stoichiometry ratio
In the above equation of the reaction, 1 mole Pb(SO4)2 reacts to give 2 moles LiSO4
Let the number of moles of Pb(SO4) be x
\(\begin{gathered} \text{ 1 mole Pb\lparen SO}_4)_2\text{ }\rightarrow\text{ 2 moles Li}_2\text{SO}_4 \\ \text{ x moles Pb\lparen SO}_4)_2\text{ }\rightarrow\text{ 3.00 moles Li}_2SO_4 \\ \text{ Cross multiply} \\ \text{ 1 mole Pb\lparen SO}_4)_2\text{ }\times\text{ 3 .00 moles Li}_2SO_4\text{ = 2 moles Li}_2SO_4\text{ }\times\text{ x moles Pb\lparen SO}_4)_2 \\ \text{ Isolate x} \\ \text{ x = }\frac{\text{ 1 mole Pb\lparen SO}_4)_2\times3moles\cancel{Li_2}SO_4}{2moles\cancel{Li_2}SO_4} \\ \text{ x = }\frac{1\text{ }\times\text{ 3}}{2} \\ \text{ x = }\frac{3}{2} \\ \text{ x = 1.5 moles} \end{gathered}\)Therefore, the number of moles of Pb(SO4)2 is 1.5 moles
The formula of a compound is M(OH)2 . Given that the Mr of compound is 98 , calculate Ar of M. (Ar of O = 16 , H = 1 ) WITH WOKING OUT
Answers
Answer:
The atomic weight Ar, of M is 64
Explanation:
The formula of the given compound is M(OH)₂
Mr, is the molecular weight of a compound and for the given compound, Mr is equal to 98.
Ar, is the atomic weight of the elements in the compound
The molecular weight, Mrof a compound is the mass of one mole mole of that compound. It can be obtained by summing the atomic masses of all elements in that compound. For elements that has more than one atom in the compound, the atomic weight of that element is multiplied by the number of atoms of the element present in the compound and then the sum of the weight of each element gives the molecular weight of the compound.
Onnthe compound above,the atomic weight of the unknown element M, is to be obtained.
Ar of the other elements inn he compound is given : Ar of O = 16, Ar of H = 1.
Molecular weight of the compound, Mr = 98
Calculating for the Ar of M:
(M × 1) + (16 × 2) + (1 × 2) = 98
M +32 + 2 = 98
M + 34 = 98
M = 98 -34
M = 64
Therefore, the atomic weight Ar, of M is 64
Look at your calculated values for 50% and 75% loss. Does the time between them match what you would expect with the graph at the beginning of this section? Using this information, does it matter where we set our A0 when solving for the half-life? Why or why not?
Answers
The calculated value at 50 percent and 75 percent loss could be expected to be given by the equation t1/2 = ln(2)/λ . Hence t1/2 is independent of time.
What is Half Life Period?“The given half-life of a reaction or any radioactive substances is the time where the concentration of a reactant will be minimized to one-half of its initial concentration”.It is represented as t1/2 .Uses of Half Life Period?Half-life is used to calculation of ages of different substances.It is also used in the chapter of chemical kinetics.For a first-order reaction, the half-life given will be independent to that of initial concentration.Now,
according to the given question,
We have to calculate the values for 50% and 75% loss.
Hence,
The difference in time is to be (300-160) = 140 sec, which means that it is closer to 160s to that of half-life.
This is expected result.
The value of A₀ does not matter to calculate the half-life. Whatever the initial value is , it will always take the same time to get halved.
We have,
N = No e– λt
where
N = No/2
t = t1/2
Now
½ = e– λ t1/2
λ t1/2 = ln (2)
hence,
t1/2 = ln(2)/λ
Hence,
t1/2 is independent of time.
Thus, from the above conclusion we can say that the calculated value at 50% and 75% loss would be expect to be given by t1/2 = ln(2)/λ . t1/2 is independent of time.
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Which of the following is a type of cell organelle?
O
membrane
cytoplasm
DNA
Nucleus
Answers
Answer:
Nucleas is a cell organelle
The option that is a type of cell organelle would be D.Nucleus
What is a cell organelle ?A nucleus is a membrane-bound organelle that contains the cell's DNA. It is the control center of the cell, and it is responsible for storing genetic information and directing the cell's activities.
The other options are not cell organelles. Membrane is a phospholipid bilayer that surrounds the cell and separates the cell's interior from the environment. Cytoplasm is the jelly-like substance that fills the cell and contains the cell's organelles. DNA is the genetic material of the cell, but it is not an organelle.
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what is the volume of a 0.12 m sulfuric acid (h2so4) solution that contains 0.33 mol sulfuric acid?
Answers
the volume of the 0.12 M sulfuric acid solution containing 0.33 mol of sulfuric acid is 2.75 liters.
To determine the volume of the sulfuric acid (H2SO4) solution, we need to use the relationship between moles, concentration, and volume.
The given information is:
Number of moles of sulfuric acid (H2SO4) = 0.33 mol
Concentration of sulfuric acid solution = 0.12 M
The formula relating moles, concentration, and volume is:
Moles = Concentration * Volume
Rearranging the formula to solve for Volume:
Volume = Moles / Concentration
Plugging in the given values:
Volume = 0.33 mol / 0.12 M
Calculating the volume:
Volume = 2.75 liters
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In which of the following cases is the vapor pressure of ethanol greatest?
A. mole fraction of ethanol in water = 0.10
B. mole fraction of ethanol in water = 0.25
C. mole fraction of ethanol in water = 0.50
D. pure ethanol
Answers
Answer:
The answer Is c. mole fraction of ethanol in water=0.50
Explanation:
Do you have more gravity when your on the ground or in the air
Answers
The gravity force on an object from the Earth is the same regardless of whether the object is surrounded by air .
the Earth has an average gravitational force. Different locations on Earth have gravitational forces that are larger or smaller than average. This is because each location has more or less mass than the average
What percentage of an original polonium sample will remain after 3 half-lives have passed?
Answers
After three half-lives, 12.5% of the original sample of polonium remains.
What is polonium element?Polonium is a very infrequent natural element. It is found in uranium ores but it is careless to extract it. It is obtained by bombarding bismuth-209 with neutrons to give bismuth-210, which then purifies to form polonium. All the industrially produced polonium in the world is made in Russia.Po-210 is an effect of the radioactive decay of uranium-238, which decays to radon-222 and then to polonium. Polonium 210 has a half-life of 138 days. Let the opening value of polonium-218 be 100. First half-life. Therefore, 6.25 % of the original sample remains after 4 half-lives that are 12 minutes. Element Polonium has atomic Number 84, p-block, Mass number is 209.
So we can conclude that polonium is a radioactive, silvery-gray, or black metallic element of the oxygen group in the periodic table.
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An apple i reting on a table Clarie ay that there are no force acting on the apple becaue it i not moving i he right
Answers
Clarie is wrong by saying that no force is acting on the apple when it is rest on the table.
Forces always come in pairs. The gravitational force is acting upon the apple and the result is that the matter in the Earth is pulling the matter in the apple. When the apple is set rest on the table, the table exerts a force upward on the apple equal to the force exerted downward, and hence the apple stays without moving. This implies that resting object always have their own gravitational force.
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C. Use the data provided in Table 2 to complete the following.
Sketch a phase diagram for O₂. The diagram should be roughly to
scale and include the Triple point and Critical point.
Answers
The triple point can be seen from the graph that has been attached here.
What is the triple point?The triple point is a special combination of temperature and pressure where the equilibrium of a substance's three phases—solid, liquid, and gas—occurs. The transition between phases happens with no discernible net change in the substance because the solid, liquid, and gas phases are in perfect equilibrium at the triple point.
A crucial reference point in thermodynamics, the triple point is frequently used to specify temperature scales and calibrate thermometers. Each substance has a specified value for temperature and pressure.
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Can somebody take some time out of their day to really help me
I’m struggling
I’ll give brainly
Answers
The reaction is endothermic with a heat of reaction is 2613 kJ/mol
What is an endothermic reaction?An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature of the immediate surroundings.
We have that;
O=O = 5(495) = 2475
O - C - O = 4(358) = 1432
C- H = 2(413) = 826
O-H = 2(467) = 934
Then we have that;
Reactant side = ( 826 + 1678) + 2475 = 4979
Products side = 1432 + 934 = 2366 kJ/mol
Heat of reaction ion = Recants - Products
= 4979 - 2366
= 2613 kJ/mol
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Determine the number of atoms of O in 32.3 moles of Al₂(SO₄)₃.
Answers
387.6 number of atoms of oxygen are in 32.3 moles of Al₂(SO₄)₃.
What do you mean by the mole concept ?
Mole is the amount of substance in a chemical system that contains as many elementary entities as there are atoms in exactly 12 grams of the carbon−12 isotope.
The mole concept is a convenient method of expressing the amount of a substance.
To calculate the the number of atoms of O in 32.3 moles of Al₂(SO₄)₃-:
The chemical formula for aluminum carbonate, Al₂(SO₄)₃ , indicates that in one mole of the compound there are twelve moles of oxygen atoms.
Now,
=22.3 m o l Al₂(SO₄)₃× 12 m o l O atoms/1 m o l Al₂(SO₄)₃
= 387.6 m o l of O atoms
Hence, 387.6 number of atoms of oxygen are in 32.3 moles of Al₂(SO₄)₃.
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do the change in enthalpy & change in entropy values favor a spontaneous reaction?
Answers
For a reaction to be spontaneous, the change in enthalpy (ΔH) should be negative (exothermic), and the change in entropy (ΔS) should be positive (increase in disorder). The Gibbs free energy (ΔG) can be used to determine the spontaneity, where a negative value of ΔG indicates a spontaneous reaction.
The change in enthalpy (ΔH) and change in entropy (ΔS) values provide important information about the spontaneity of a reaction. For a reaction to be spontaneous, it should have a negative ΔH (exothermic) and a positive ΔS (increase in disorder).
1. If ΔH is negative, it means that the reaction releases energy in the form of heat. This is favorable for a spontaneous reaction because it indicates that the products are more stable than the reactants.
2. If ΔS is positive, it implies an increase in the randomness or disorder of the system. This increase in entropy favors the spontaneity of a reaction since nature tends to move towards higher entropy states.
3. To determine whether a reaction is spontaneous, we can use Gibbs free energy (ΔG). The relationship between ΔH, ΔS, and ΔG is given by the equation: ΔG = ΔH - TΔS, where T represents temperature. If ΔG is negative, the reaction is spontaneous.
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HELPP!! INOIC BONDS
How will Sr and O come together in an ionic bond? Complete the sentence: For
every 1 atom of Sr, there will be
atom(s) of 0.
Choose
Answers
The ionic substance strontium oxide, SrO, forms from the reaction of strontium metal with molecular oxygen.
What is ionic compounds?Positively charged ions, known as cations, and negatively charged ions, known as anions, make up ionic compounds, which are neutral substances. The name of the cation is written first, followed by the name of the anion, for binary ionic compounds (ionic compounds that only contain two types of elements).A chemical compound known as an ionic compound in chemistry is one that contains ions bound together by the electrostatic forces known as ionic bonding. Despite having both positively and negatively charged ions, or cations and anions, the molecule is generally neutral.Ionic bonding will often be present in compounds when a metal is bound to either a non-metal or a semi-metal.Learn more about Ionic compound refer to ;
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74.7 g of Calcium Chlorate = __mol
Answers
Answer:
747 mol.
Explanation:
Cyanide and water react in a proton transfer reaction to form hydrogen cyanide and hydroxide
Answers
The proton transfer reaction between Cyanide and water can be written as; X^- + H2O -----> HX + OH^-
What is a proton transfer reaction?A proton transfer reaction is one in which a proton is moved from one chemical specie to another.It is in fact and acid - base reaction in the Brownstead - Lowry sense.
The proton transfer reaction between Cyanide and water can be written as(Let the cyanide ion be shown as X);
X^- + H2O -----> HX + OH^-
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The proton transfer reaction to form hydrogen cyanide and hydroxide is
X⁻ + H₂O → HX + OH⁻
What is a proton transfer reaction?A reaction in which a proton H⁻ is removed from one species and accepted by another species.
An example of a proton transfer is Brønsted acid reacting with a Brønsted base.
Thus, the proton transfer reaction to form hydrogen cyanide and hydroxide is X⁻ + H₂O → HX + OH⁻
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