Answers
Answer: It would be B
Explanation: a magnet moves from north to south
due to pole attraction is more in the north region
Related Questions
pls help me with this questions for 30 points and brainiest
Answers
Answer:
d is correct
Explanation:
Long hours of work in the lab have reveled an improved version of the drug, D', which forms an additional hydrogen bond with the drug target enzyme E. This results in an overall stabilization of the complex ED' relative to ED and the binding free energy for ED' is 10.5 kJ/mol more negative than for ED. What is the resulting dissociation constant for the complex ED' at room temperature
Answers
The correct answer is 0.015 M. The resulting dissociation-constant for the complex ED' at room temperature is 0.015 M.
The dissociation constant (Kd) can be defined as the reciprocal of the association constant (Ka). The dissociation constant describes the extent of binding between two or more molecules that are non-covalently bonded or can be considered as a measure of the concentration of dissociated molecules in a solution. The lower the dissociation constant (Kd), the greater the affinity of the two interacting molecules.
Let's calculate the dissociation constant for the complex ED' at room temperature:
ΔG = -RTlnKa
Where ΔG is the change in free energy,
R is the universal gas constant, and
T is the temperature.
Ka = e^(-ΔG/RT)
Substitute the given values,
Ka = e^(-(-10.5 × 10^3 J/mol) / (8.31 J/mol K × 298 K))
Ka = e^(4.2)
Ka = 66.68
The association constant (Ka) is 66.68 M⁻¹.
The dissociation constant (Kd) is the reciprocal of the association constant (Ka)
Kd = 1/KaKd
= 1/66.68Kd
= 0.015 M
Therefore, the resulting dissociation constant for the complex ED' at room temperature is 0.015 M.
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Atoms in aluminium foil paper are the same as the atoms in the aluminium pot.
True or false
Answers
Answer:
False
Explanation:
what are two reasons why pH affects enzyme rate?
Answers
Answer: The first is that enzymes have an ideal pH range in which they operate most effectively, and any departure from this range may cause a reduction in enzyme activity. The enzyme's shape or conformation may change as a result of a pH shift, which may also have an impact on the enzyme's capacity to bind to substrates and catalyze processes.
Explanation: Because particular pH ranges are necessary for enzyme activity, PH has an impact on enzyme rate. The pH at which an enzyme is most active is known as its ideal pH, and it might vary from one enzyme to another. A change in pH can cause an enzyme's structure to change, making it more difficult for it to connect to the substrate, which will halt or even stop the process. Even extreme pH values have the ability to denature the enzyme, making it inactive.
The pH levels have a significant impact on an enzyme's capacity to operate effectively, which in turn affects how quickly it can catalyze chemical processes.
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what is an orbital in chemistry
Answers
Answer:
Wave function
Explanation:
orbital, in chemistry and physics, a mathematical expression, called a wave function, that describes properties characteristic of no more than two electrons in the vicinity of an atomic nucleus or of a system of nuclei as in a molecule.
the greater gravitational force
Answers
Answer:
The stronger the pull of gravity on an object ( the greater it's weight)
what is the amount of gold present in 15.5g of a pure gold ring? (Au=197)
Answers
Answer:
.0787 moles
Explanation:
I'm assuming you mean moles of gold present as the "amount."
This is a moles to moles calculation, so we set it up as such:
*Note that 15.5g Au is given to us, and 197 g / mol of Au is gold's molar mass.
15.5g Au * (1 mol Au / 197 g Au) = ?
We can evaluate the equation to get 15.5 / 197 to get .0787 moles of Au.
Alma's mother keeps many potted plants. In the summer, she keeps the plants outside. Some of the plants are placed in full, direct sunlight. Others are placed in the shade under the trees. Alma has noticed that her mother gives the plants that are in the sun much more water than the ones in the shade. Alma asked her mother why some plants were in the sun and others in the shade. Her mother explained that some plants need more light than others. Alma concludes that plants that need more light also need more water. Which of the following is a possible alternative explanation for why the plants in the sun are given more water?
Answers
The plants in the sun are given more water because in the presence of sunlight, the water transpire more quickly.
Why the plants in the sun are given more water?
Loss of water is also important because it can cool plants on very hot summer days. If plants are present in limited amount the plants close their stomata and eventually the process of photosynthesis stops. But the process of respiration remains continue. Water is necessary for photosynthesis because the plants use water and carbondioxide gas in the presence of sun in order to create their own food. During this process, plants use carbon dioxide from the air and water that is absorbed through their roots forming food in the form of glucose and oxygen.
So we can conclude that the plants in the sun are given more water because in the presence of sunlight, the water transpire more quickly.
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11
Two students are investigating relative motion. One student is on a bike and the other is on
foot.
The students on foot runs alongside the student on the bike as they cycles at the same speed.
Is their relative motion the same? Explain your answer? (highlight the correct answer)* 193
(1 Point)
Answers
Explanation:
No because the person on the bike is going faster then the person on foot.
Please help How many moles of a gas sample are in 5.0 L container at 215 K and 342 kPa(The gas constant is 8.31 L kPa/mol K) Round your answer to one decimal place and enter the number only with no units.
Answers
Answer
1.0 mol
Explanation
Given:
Volume, V = 5.0 L
Temperature, T = 215 K
Pressure, P = 342 kPa
The gas constant, R = 8.31 L kPa/mol K
What to find:
The number of moles of the gas sample.
Step-step-solution:
The number of moles of the gas can be determine using the ideal gas equation formula:
\(PV=nRT\)Put the given values into the formula and calculate for n:
\(\begin{gathered} 342\times5.0=n\times8.31\times215 \\ 1710=1786.65n \\ \text{Divide both sides by 1786.65} \\ \frac{1710}{1786.65}=\frac{1786.65n}{1786.65} \\ n=0.9571\text{ mol} \\ To\text{ one decimal place,} \\ n=1.0\text{ mol} \end{gathered}\)The number of moles of the gas sample is 1.0 mol.
Why dont people brush their teeth?Like some be going around people and everything,UGHHHHH!
Please tell me
Answers
Answer:
like so true just brush your teeth... if you can't afford it then no disrespect to you
Explanation:
Answer:
their fault when the grow up and have yellow teeth + dentures and they are like 28 XD
Explanation:
Which of the following best describes a meridian of longitude?
A line that is drawn horizontally around the earth and is parallel to the Prime Meridian.
A line that is drawn vertically down the earth and is parallel to the equator.
A line that is drawn vertically down the earth but is NOT parallel to the Prime Meridian.
A line that is drawn horizontally around the earth and is parallel to the equator.
Answers
Answer:
A line that is drawn vertically down the earth but is not parallel to the prime Meridian.
Explanation:
A line that is drawn vertically down the earth but is NOT parallel to the Prime Meridian, best describes the meridian of longitude.
What is prime meridian?Prime Meridian is an imaginary line which divides the earth into eastern and western hemispheres
What do you mean by meridian of longitude?Meridian of longitude is an imaginary semicircle that runs from north to south direction and joins the two poles. All meridians are of the same length and meet at the poles.
Hence, option 3 is the answer.
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Validity,Reliability and Accuracy through the process of separating iron filings, sand and salt from the mixture
Answers
Validity, Reliability and Accuracy are used in the following ways:
How important are Validity, Reliability and Accuracy in separating iron filings?
Validity refers to whether the process of separating iron filings, sand, and salt actually measures what it is intended to measure. In this case, the process is intended to measure the ability to separate the three substances from each other, so as long as the process accurately reflects this ability, it can be considered valid.Reliability refers to whether the process can be consistently replicated with similar results. If the process is carried out by different individuals or at different times, it should still lead to the same outcome. In the case of separating iron filings, sand, and salt, if the same process is used with the same materials, it should result in the same outcome every time.Accuracy refers to how closely the results of the process reflect the true values or qualities of the substances being separated. In this case, the accuracy of the process will depend on whether all of the iron filings, sand, and salt have been completely separated from each other, and whether the amounts of each substance are accurately measured after the separation is complete.
Overall, to ensure validity, reliability, and accuracy when separating iron filings, sand, and salt from a mixture, it is important to follow a standardized and consistent process, use appropriate materials and equipment, and accurately measure and record the amounts of each substance before and after separation.
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How many grams of sodium fluoride are needed to prepare a 0.600m NaF solution that contains 600.0 g of water? Show your work.
Answers
Molality (W) is the ratio of the amount of substance of a solute (in moles – n) to the mass in kilograms of the solvent (m1). It can be calculated by the following formula:
W = n/m1
Step 1 - Let's discover how many moles of sodium fluoride is needed first.
Let's transform 600 g of water to kilograms:
1 g = 0.001 kg
600 g = 0.6 kg
W = 0.600m
m1 = 0.6
0.600 = n/0.6
n = 0.36 moles of sodium floride
Step 2 - Let's transform 0.36 moles of NaF into grams. Let's use the following formula: mass = moles x molar mass
molar mass of NaF = 42 g/mol
mass = 0.36 x 42
mass = 15.12 g
Answer: 15.12 g of NaF
convert eachh into scientific notation
4.060 x 10^5 →
7 x 10^3 →
5.0 x 10^-4 →
8 x 10^-2 →
Answers
Answer:
0.00580 →
3000 →
0.000908 →
200. →
Explanation:
yay
Answer:
\(\large \boxed{\mathrm{view \ explanation}}\)
Explanation:
4.060 × 10⁵ (scientific notation)
The decimal point moves 5 places to the right.
⇒ 406000 (standard form)
7 × 10³ (scientific notation)
The decimal point moves 3 units to the right.
⇒ 700 (standard form)
5.0 × 10⁻⁴ (scientific notation)
The decimal point moves 4 units to the left.
⇒ 0.0005 (standard form)
8 × 10⁻² (scientific notation)
The decimal point moves 2 units to the left.
0.08 (standard form)
What is the mass of an object if it produces a 20 N force with a 4m/s/s
acceleration?
Answers
Answer:
The answer is 5 kgExplanation:
To find the mass given the force and acceleration we use the formula
\(mass = \frac{force}{acceleration} \\ \)
From the question
force = 20 N
acceleration = 4 m/s²
We have
\(mass = \frac{20}{4} \\ \)
We have the final answer as
5 kgHope this helps you
Hi! My responsibility is to add and protection to plant cells. what i am
Answers
Copernicus believed the planetary motions were due to:
Answers
Answer:circular heliocentric orbits.
Explanation:
Which of the following describes fertilization?
Answers
Answer: Fertilization defintion
Explanation:
the action or process of fertilizing an egg, female animal, or plant, involving the fusion of male and female gametes to form a zygote.
Or giving rise to new indivisual organisms or offspring and initiating development
Select the correct electron configurations from the list below. You can refer to the periodic table for atomic numbers. Check all that apply.
Answers
You push your friend up the street with a force of 200N. How much work did you do if you traveled 15m?
Formula:
Solution:
Answer:
Answers
Answer:
3000J
Explanation:
Formula: Work = Force × Distance
Solution: Work = 200N × 15m
Answer = 3000N/m or 3000J
Calculate the volume of 1. 0 x 10-4 m cv+ solution that needs to be added to a 25. 0 ml volumetric flask and diluted with deionized (di) water in order to prepare a calibration standard solution with a concentration of 1. 0 x 10-5 m cv+. As part of your preparation for performing this experiment, repeat this calculation for each of the calibration standards you would need to prepare in part i a of the experiment and record the information in your notes so that you have it ready during the lab session. Also calculate the volume of 1. 0 x 10-4 m cv+ solution required to prepare 10 ml of 3. 0 x 10-5 m cv+ solution to be used in part ii b of the experiment and record the information in your notes.
Answers
2.5 ml and 3 ml of solution, respectively, are needed to make the final concentration of.
What is calibration standard solution?Standard addition, internal standard, and external standard techniques to quantitation all employ calibration solutions. Calibrants can be made gravimetrically using reference standards or pure reference materials, but they can also be made on a volumetric or other fraction basis.
How do you prepare a calibration solution?Calculate the volume of stock solution needed for each calibration standard by deciding on its number (minimum 5) and concentration. As often as necessary, repeat the treatment. Select and create the dilution solution (such as a matrix solution or 1% acid, for example). Both the working curve method and the standard addition method can be used to calibrate an instrument.
Briefing:Calibration standard solution is the solution prepared of the known concentration for the plotting of standard curve.
For preparing the solution of known concentration and volume, the equation imputed is :
M1V1=M2V2
Where M1 and V1 are molarity and volume of known solution
M2 and V2 are molarity and volume of solution to be prepared.
Given, volume to be prepared V2 : 25 ml
concentration to be prepared : M_2:1×〖10〗^(-5) M
concentration of given solution : M_1:1×〖10〗^(-4) M
1×〖10〗^(-4)×V_1=1×〖10〗^(-5)×25
Volume of solution required is 2.5 ml.
The volume required to prepare 10 ml solution of 3×10-5 M is:
1×10-4×V1=3×10-5×10
Volume = 3 ml.
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What is the charge on oxygen (O) when it forms an ion? a 1+ b 1− c 2+ d 2−
Answers
Answer:
d. 2-
when it forms an ion.
Explanation:
how do atoms achieve noble-gas configurations in single covalent bonds
Answers
Answer:
by sharing an electron
Explanation:
each of the two bonded atoms share an electron....making a single covalent bond b/w the two....like in....F - F
An electron in a hydrogen atom has principal quantum number n = 4. how many possible values of the orbital quantum number l could it have?
Answers
The electron in a hydrogen atom that has principal quantum number n = 4 could have 4 possible values of L the orbital quantum number.
What is orbital quantum number ?
The orbital quantum number, or l, must be smaller than the primary quantum number, or n, which is equivalent to an electron "shell." Since all of the electrons in each shell have the same primary and orbital quantum numbers, l separates each shell into n subshells.
The l values that can occur when n = 4 are 0 through 3. This suggests that the 4s, 4p, 4d, and 4f subshells are the 4 potential subshells. There is only one orbital in the 4s subshell, yet it has space for two electrons. There are three orbitals in the 4p subshell, which has room for six electrons.
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What aspects of thermodynamics can an enzyme not change?
Answers
The aspects of thermodynamics the enzyme can not change are alter the overall energy balance of a chemical reaction and overall direction of a reaction
Firstly, enzymes cannot alter the overall energy balance of a chemical reaction, the first law of thermodynamics states that energy cannot be created or destroyed, only converted from one form to another. Enzymes can speed up reactions by lowering the activation energy, but they cannot change the total energy input or output.
Secondly, enzymes cannot change the overall direction of a reaction, as dictated by the second law of thermodynamics, this law states that natural processes tend to increase the entropy (disorder) of the system. If a reaction is not thermodynamically favorable (i.e., it would result in a decrease in entropy), enzymes cannot make it occur spontaneously. They can only increase the reaction rate if the reaction is already favorable. In summary, enzymes can speed up the reaction rate and lower activation energy, but they cannot change the total energy balance or the overall direction of a reaction, as these are determined by the laws of thermodynamics.
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Eye color is mostly caused by ?
Answers
Answer:
Genes
Explanation:
Eye color is a genetic feature given to a child by the parents.
in blood plasma, ph is maintained by the carbonic acid-bicarbonate buffer system. how is ph maintained when acid or base is added to the buffer system?
Answers
The blood interacts with the bicarbonate, C03²-, from the acid to balance it when acid is supplied to the blood buffer system.
How does a buffer system operate and what does it mean?A buffer is a substance that can withstand a pH shift when acidic or basic substances are added. Small additions of acid or base can be neutralized by it, keeping the solution's pH level largely constant. For procedures and/or reactions that call for certain and stable pH ranges, this is significant.
Give an example of what a buffer system is.Buffer solutions can resist the pH change when a strong acid or base is added sparingly. A strong acid and also its salt can be used as a buffer. It is a mixture of sodium acetate and acetic acid, CH3COOH + CH3COONa.
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Help would be greatly appreciated
What is pressure?
Answers
Answer:
D
Explanation:
Pressure is the force that you produce by the gas or liquid in a place or a container
what are examples of types of chemical markers associated with dna that determines when, where and by how much genes are expressed in each cell?
Answers
examples of types of chemical markers associated with dna that determines when, where and by how much genes are expressed in each cell is epigenetic.
When, where, and how much a gene is expressed in a cell depends on the histones and epigenetic elements working together.
Who or what are histone protein factors?Eukaryotic cells have proteins called histones that serve two purposes. They help keep DNA compact and control the loosening and tightening of the DNA strands that control gene expression.
How do epigenetic factors work?Epigenetic factors are substances that alter genes to control how they are expressed. Both changes are not inheritable and do not lead to mutations. These include transient changes such as DNA remodeling, methylation and alkylation.
The field of epigenetics deals with stable phenotypic changes that are not caused by changes in the DNA sequence. Epigenetics, a name derived from the Greek prefix epi-, refers to traits that are 'above' or 'additional' to the conventional genetic base.
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