Frontier ethics explains that nature has an unlimited supply of resources. So, humans can use natural materials limitlessly. These ethics are sometimes considered as human interference in the matter of natural resources and the environment. Harmony with nature is not possible if human will follow frontier ethics.
Human manages and controls the natural environment. Human consumption of resources in unlimited ways was also discussed in frontier ethics. Natural laws are not followed in frontier ethics. According to frontier ethics, human development and economic growth are the most important issues.
In short, human attitudes and behavior toward nature are not so good. Here, humans are not much concerned about environmental problems. They only value their needs and desires.
Therefore, the correct answer is (A).
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What is the [OH-] in a solution that contains 0.285 g of NaOH in 0.350 L of solution 
The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, 0.020M is the [OH⁻] in a solution that contains 0.285 g of NaOH in 0.350 L of solution.
What is molarity?Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.
Mathematically,
Molarity= number of moles of solute/volume of solution in litre
Where,
moles= given weight /by molecular weight
= 0.285 g/ 40
=0.0071moles
Substituting values in equation 1
Molarity=0.0071/0.350
Molarity=0.020M
Therefore, 0.020M is the [OH⁻] in a solution that contains 0.285 g of NaOH in 0.350 L of solution.
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when a substance goes under evaporation does energy increase or decrease 
Answer:
it decreases and lowers the average energy of the remaining liquid molecules
Which statement below best describes SO2 with respect to the polarity of bonds and the polarity of the molecule? A) SO2 has polar S-O bonds and is a non-polar molecule. B. SO2 has polar S-O bonds and is a polar molecule. C) SO2 is neither a polar nor a non-polar molecule but is rather an ionic compound. D) SO2 has non-polar S-O bonds and is a polar molecule. E) SO2 has non-polar S-O bonds and is a non-polar molecule.
The statement below best describes SO₂ with respect to the polarity of bonds and the polarity of the molecule is B) SO₂ has polar S-O bonds and is a polar molecule.
The SO₂ is an covalent bond. the bond between the sulfur and the oxygen atom is the covalent bond. the oxygen atom is more electronegative than the sulfur atom . the oxygen atom attract the shared paired of the electron towards it self. thus it makes the S - O bond polar bond. the each S - O bond is polar bond. the net dipole moment in the SO₂ molecule is greater than zero due to the unequal sharing of the electrons.
Thus, the SO₂ molecules is the polar molecule.
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a radioactive isotope, like 14c, can be used to accurately date something up to about half-lives.
A radioactive isotope, like 14c, can be used to accurately date something up to about half-lives.
Carbon-14 has a half-life of 5,730 ± 40 years (i.e., half the amount of the isotope present at any instant will undergo spontaneous disintegration during the succeeding 5,730 years).
What is an isotope?
The first 80 elements in the periodic table have stable isotopes. The properties of stable isotopes allow their use to understand and manage water and soil resources. They are also used in environmental studies, nutritional assessment and forensic science.Naturally occurring stable isotopes, such as hydrogen isotopes, are used by measuring their abundance and ratio in water samples to determine the age and origin of water, understand its history, and recognize its sources. This is known as isotopic hydrology.To know more about isotopes of elements, click the link given below:
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the accepted density of a certain material is 7.44 g/cm^3. A student measures the density of the same material as 7.30 g/cm3. What is the percentage error of the measurement?
The percentage error of the measurement, given that the accepted measurement is 7.44 g/cm³, is 1.88%
How do I determine the percentage error?First, we shall determine the absolut error. This can be obtained as follow:
Accepted value = 7.44 g/cm³Measured value = 7.30 g/cm³Absolute error = ?Absolute error = accepted value - measured value
Absolute error = 7.44 - 7.30
Absolute error = 0.14 g/cm³
Haven obtained the absolute error, we shall determine the percentage error. Details below:
Absolute error = 0.14 g/cm³Accepted value = 7.44 g/cm³Percentage error =?Percentage error = (Absolute error / accepted value) × 100
Percentage error = (0.14 / 7.44) × 100
Percentage error = 1.88%
Thus, we can conclude that the percentage error is 1.88%
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Which of the following is currently most often used to indicate the location of a signal on an IR spectrum?a. frequencyb. wavelengthc. wavelength and wavenumberd. wavenumber
Currently, the method utilised to identify a signal's position on an IR spectrum is called vibration excitation (increase vibration of the bonds or frequency).
The fingerprint area is the range of the infrared spectrum between 1200 and 700 cm-1. By measuring atom vibrations using IR spectroscopy, the functional groups of molecules can be identified.
What device might we employ to find IR?
A radiometer is a device used to find or quantify radiant energy. The phrase is specifically used in reference to instruments used to measure infrared radiation. There are several different types of radiometers, and each has a different measurement method.
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A gas has an initial volume o 5.32L at 371K. The same gas now has a volume of 4.90 Lat 273
K and 1.03 atm. What was the original pressure of the gas?
Type your answer...
Answer:1.29atm
Explanation: We are given P2,V1,V2,T1, and T2. We are looking for P1.
We can plug it into the combined gas laws formula.
[tex]\frac{(P1)(V1)}{T1} =\frac{(P2)(V2)}{T2}[/tex] [tex]P1=\frac{(P2)(T1)(V2)}{(T2)(V1)}[/tex]P1 = ?
V1 = 5.31 L
T1 = 371 K
P2 = 1.03 atm
V2 = 4.90 L
T2 = 273 K
[tex]P1 = \frac{(1.03)(371)(4.90)}{(273)(5.31)} \\[/tex]
P1 = 1.29 atm
What is the percent composition of Fluorine (F) in the compound XeF6?
Od
26.258%
12.520%
110.76%
46.472%
The percent by mass of the fluorine in the compound is 46.472%.
What is the percent by mass?We know that the percent by mass has to do with the ratio of the total mass of the atom that is part of the compound and the total molar mass of the compound multiplied by one hundred.
The question in this case has demanded that we ought to obtain the mass percent of fluorine from the compound that we can be able to identify from the formula of the compound that is shown here as xenon hexa fluoride.
Mass of the compound can be obtained from; 131 + 6(19)
= 245 g/mol
The total mass of the fluorine atom in the compound is 114 g
Thus we have the use of; 114 /245 * 100/1
= 46.472%
The percent by mass is now gotten for the fluorine atom as 46.472%.
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structural insights from molecular dynamics simulations of tryptophan 7-halogenase and tryptophan 5-halogenase.
A computer simulation technique called molecular dynamics (MD) examines the actual motions of atoms and molecules. For a predetermined amount of time, the atoms and molecules are allowed to interact, providing insight into the system's dynamic "evolution."
What purposes might molecular dynamics serve?
For big molecules like proteins, molecular dynamics is frequently the approach of choice. It can be used to explore conformational space. In molecular dynamics, the energy surface is investigated by resolving the system's Newton's laws of motion.
How do simulations of molecular dynamics function?
A method for simulating complicated processes on computers that models them at the atomic level is called molecular dynamics. The system's time evolution is tracked by numerically solving the motion equations, which enables the use of "computer experiments" to derive important kinetic and thermodynamic parameters.
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Work through Example 17.9. Then, calculate how many minutes it will take to plate out 10.0 g of zinc using a current of 5.0 A? Hint: first write an equation for the reduction of zinc ions to elemental zinc.
The time to plate out 10.0 g of zinc using a current of 5.0 A is 98.35 minutes.
The reduction reaction in the electrolysis reaction of zinc
Zn²⁺ + 2e → Zn.
Based on stoichiometry, the number of moles is proportional to the number of reacting atoms or ions.
Number of moles for Zn
n = m ÷ Mr
n = 10.0 ÷ 65.4 = 0.153 mol
Number of moles for electrons
n Zn : n e = 1 : 2
n e = 2 × n Zn
n e = 2 × 0.153 = 0.306 mol
The equation for the number of moles of an electron from Faraday's law
n e = It ÷ 96,485
It = n e × 96,485
5.0 × t = 0.306 × 96,485
t = 29,506.12 ÷ 5
t = 5,901.22 s
t = 5,901.22 ÷ 60 minutes
t = 98.35 minutes
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What is the mystery element based on the image?
Uranium-235 has 92 protons and 143 neutrons. The mystery element based on the image is krypton 89.
What is an element ?
A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.
Uranium-235 has 92 protons and 143 neutrons. As an example, two extremely unstable fission fragments, a barium and a krypton nucleus, are produced in many known fission processes of uranium-235 initiated by absorbing a neutron. These pieces very instantly split into barium-144 and krypton-89 after releasing three neutrons each.
Thus, The mystery element based on the image is krypton 89.
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all of the following are strong acids except question 1 options: nitric acid hydrochloric acid perchloric acid acetic acid sulfuric acid
Sulfuric acid, nitric acid, hydrochloric acid, and perchloric acid are all powerful acids, while acetic acid is a milder one. These acids are all included in the option's given list of acids.
What is acid?
When a substance is treated with aqueous solution, acid—which has a pH below 7—releases H+ ions. The acids are divided into two groups based on their dissociation rates: strong acids, which have a high dissociation rate, and weak acids, which have a low dissociation rate.
With the chemical formula CH3COOH, acetic acid is an organic acid. It is an indistinct acid also known as ethonoic acid.
Vinegar gets its distinctive smell from acetic acid, a byproduct of fermentation.
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A 15.5 gram sample of diphosphorous pentoxide contains how many grams of oxygen? O 3.38 O 1.69 O 6.76 O 13.5 8.74
A 15.5 gram sample of diphosphorous pentoxide contains 8.74 grams of oxygen (option D)..
How to calculate mass of an element in a compound?A chemical compound is a substance formed by the union of two or more chemical elements in a fixed ratio, the union being a chemical bond.
According to this question, a chemical compound named diphosphorous pentoxide (P₂O₅) is made up of two elements namely: phosphorus and oxygen.
The atomic mass of oxygen in the compound is as follows: 16 × 5 = 80g/mol
Atomic mass of P₂O₅ = 142g/mol
Mass of oxygen = 80/142 × 15.5 = 8.74 grams
Therefore, 8.74 grams is the mass of oxygen in the compound.
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in the solid state, which of the following forces ammonium acetate units, nh4c2h3o2, to each other? (select all that apply) london dispersion forces dipole-dipole forces hydrogen bonds ion-ion
Ammonium acetate (nh4c2h3o2) is attracted to other ions by ion-ion attraction.
Describe solid state.When the constituent particles of a substance are very tightly packed together, the result is a solid state of matter. A solid substance contains atom, volume, ions, as well as other constituent particles. A solid's shape, weight, and volume are determined by the strong and quick interactions that take place between its constituent particles.
What are the benefits of a solid state?In essence, it aids in our understanding of the molecule from the molecular to the crystallographic levels. Nonstoichiometric compounds are classified as an exclusive solid-state compounds in solid-state chemistry because of their structural and thermodynamic properties.
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Question 1-3
A balloon with a volume of 2.50 L is left in a car at 323K. After sitting in the sun, the temperature increases to 398K. What is the volume
of the heated balloon?
Answer:
[tex] \huge{\boxed{3.08 \: L}} [/tex]
Explanation:
The volume of the heated balloon can be found by using the Charles' law formula which is;
[tex] \bold{\frac{V_1}{T_1} = \frac{V_2}{T_2}} \\ [/tex]
where
T1 is the initial temperature
T2 is the final temperature
V1 is the initial volume
V2 is the final volume
From the question
T1 = 323K
T2 = 398K
V1 = 2.5 L V2 = ?
[tex] V_2 = \frac{V_1 \times T_2}{T_1} \\ [/tex]
[tex] V_2 = \frac{2.5 \times 398}{323} = \frac{995}{323} \\ = 3.0804 [/tex]
We have the final answer as
3.08 LWhat is the de Broglie wavelength of an electron traveling at 1.59×105m/s ?
The de Broglie wavelength of an electron traveling at 1.59×105m/s is 0.4547 x 10⁻⁹ m.
What is an electron ?The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically regarded to be elementary particles.
The length scale at which a particle's wave-like characteristics are significant is indicated by its de Broglie wavelength. The symbol or dB is typically used to indicate the De Broglie wavelength. The de Broglie wavelength for a particle with momentum p is given by dB = hp.
λ = h/mv
Where,
λ = wavelength of electron
m = mass of electron = 9.11e-31 kg
v = speed of electron = 1.59 × 10⁵ m/s
h = constant
Therefore,
λ = (6.626x10⁻³⁴J-s) ÷ [(9.11e-31 kg) (1.59 x 10⁵ m/s)]
λ = 0.4547 x 10⁻⁹ m
Thus, The de Broglie wavelength of an electron traveling at 1.59×105m/s is 0.4547 x 10⁻⁹ m.
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Oxygen and chlorine gas are mixed in a container with partial pressures of 3040 mmHg
1.63 atm, respectively.
What is the TOTAL pressure inside the container in atm? *Don't forget to convert: 760mmHg
= latm*
Type your answer...
A mixture of oxygen and chlorine gas with a partial pressure of 3040 mmHg and 1.63 atm respectively will have a total pressure of 5.55 atm.
Partial pressure of gas mixturesAccording to Dalton's law of partial pressure, when a gas contains a mixture of gases, the total pressure of the gas mixture is the sum of the individual gas pressure.
This law can be mathematically expressed as:
P (total) = P ₁ + P ₂ + P ₃ + ......
Where P is the pressure of gas and 1, 2, 3, etc., represent the gases respectively.
In this case, the pressure of oxygen is 3040 mmHg. We first need to convert this to atm.
1 mmHg = 0.0013 atm
Thus, 3040 mmHG = 3040 x 0.0013
= 3.952 atm
The pressure of chlorine is 1.63 atm. Thus, the total pressure of the gas mixture would be:
P (total) = P oxygen + P chlorine
= 3.92 + 1.63
= 5.55 atm
In other words, the total pressure inside the container in atm would be 5.55 atm.
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It takes 4 pounds of steel to make a small robot. You have 48 ounces. Do you have enough? If not what do you need?
No, 48 ounces are not enough. For making a small robot we need 64 ounces which is equal to 4 pounds.
What is pound and ounces?Pound is a unit for measuring weight. 16 ounces makes one pound.
Ounce is also a unit for measuring weight. 16 ounces is equal to 1 pound
So, for making one small robot we need 4 pounds.
1 pound = 16 ounces
4 pounds = 64 ounces
But, we have 48 ounces
We need more = 64 - 48 = 16 ounces or 1 pound
No, 48 ounces are not enough. For making a small robot we need 64 ounces which is equal to 4 pounds.
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what percent of glucose C6H12O2 is carbon?
Answer: 40.0%
Explanation: Thus the % composition of glucose by mass is carbon 40.0 % oxygen 53.3 % hydrogen 6.7 % In this way, the % composition by mass of any compound can be calculated provided that its formula is known.
when the electron moves closer to the nucleus, the energy increases to overcome the positive and negative attractions.
Yes, this is correct. When an electron moves closer to the nucleus, the electrical attraction between the electron and the nucleus increases and the electron must expend more energy to stay in that position. This increase in energy is due to the increased force of attraction between the electron and the nucleus.
The Effect of Electrostatic Attraction on Electron EnergyThe interaction between electrons and the nuclei of atoms is the basis of chemistry. This interaction is due to the attractive force of electric charge, which is known as electrostatic attraction. This force can be felt when an electrically charged object approaches another electrically charged object.
The electrostatic attraction between an electron and the nucleus of an atom depends on the electric charge and the distance between them. The more charged the electron is, the stronger the attraction. The closer the electron is to the nucleus, the stronger the attraction.
This means that when an electron moves toward the nucleus, the electrostatic attraction between them increases, requiring the electron to expend more energy to stay there. This means that when an electron moves closer to the nucleus, the energy of the electron increases to overcome the positive and negative attraction.
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Dr
Carries oxygen-rich blood and
nutrients away from the heart
to the rest of the body
Carries carbon
dioxide-rich blood
back to the heart
3
Exchanges gases to remove
carbon dioxide and add
oxygen to blood
Responsible for
pumping blood
throughout the body
Transports oxygen-depleted
blood to the lungs to exchange
CO₂ for O,
Transports oxygen-rich blood
to the heart to redistribute to
the rest of the body
 dragon drop 
Calculate the de Broglie wavelength of a 143- g baseball traveling at 80 mph .
The de Broglie wavelength of a 143- g baseball traveling at 80 mph is 1.092 × 10⁻³⁴ m.
What is de broglie wavelength ?The length scale at which a particle's wave-like characteristics are significant is indicated by its de Broglie wavelength. The symbol or dB is typically used to indicate the De Broglie wavelength. The de Broglie wavelength for a particle with momentum p is given by dB = hp.
Given that,
Mass of the baseball ( m ) = 143 g
= 0.143 kg
Velocity of the baseball ( v ) = 95 m/h
1 m/h = 0.447 m/s
Velocity of the baseball ( v )= 80 m/h
= 35.76 m/s
De-Broglie wavelength is given by :
H is Planck's constant
Thus, The de Broglie wavelength of a 143- g baseball traveling at 80 mph is 1.092 × 10⁻³⁴ m.
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During the light reactions of photosynthesis, ATP can be generated either by linear electron flow or cyclic electron flow. Which of the following best explains differences between these two mechanisms? ( 2 points)Cyclic electron flow uses only photosystem I and does not produce NADPH or release oxygen.Cyclic electron flow uses photosystems I and II and produces NAPPH but does not release oxygen.Linear electron flow uses only photosystem II but produces NADPH and releases oxygen.Linear electron flow uses photosystems I and II and releases oxygen but does not produce NADPH.
The PSs work in series to move electrons from water to NADP+ while simultaneously producing NADPH and ATP.
What is ATP?
The energy used and stored by cells is derived from adenosine triphosphate (ATP). Adenine, a ribose sugar, and three serially linked phosphate groups make up the nucleoside triphosphate (nucleoside) structure of ATP.
What is electron ?
A negatively charged subatomic particle called an electron can be either attached to or detached from an atom (not bound). Along with protons and neutrons, the electron is one of the three primary particle types found inside an atom.
The PSs work in series to move electrons from water to NADP+ while simultaneously producing NADPH and ATP. Contrarily, cyclic electron flow (CEF) recycles electrons around PSI by diverting them away from ferredoxin (Fd) and toward the plastoquinone (PQ).
Therefore, the PSs work in series to move electrons from water to NADP+ while simultaneously producing NADPH and ATP.
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Which air mass contains cold, dry air?
Answer:
The answer to your question is ⇔ arctic air mass
Explanation:
I hope this helps and have a wonderful day!
222222222222222222222222222222222222222222
Answer:
Explanation:
Yes
The indicator in a titration changed color after 0.01 mol of sodium hydroxide were added to a sulfuric acid solution for the acid-base reaction shown below:
H2SO4 + 2NaOH → Na2SO4 + 2H2O
How many moles of sulfuric acid are in solution?
The number of moles of sulfuric acid in the solution would be 0.005 mol.
Stoichiometric problemFirst, the balanced equation of the reaction is as below:
[tex]H_2SO_4 + 2NaOH -- > Na_2SO_4 + 2H_2O[/tex]
From the equation, the mole ratio of sodium hydroxide to sulfuric acid is 2:1. This means that for every 1 mole of sodium hydroxide used in the reaction, 0.5 moles of sulfuric acid is required.
Now, in this case, the indicator changed color after 0.01 mol of sodium hydroxide has been added to the sulfuric acid solution. This means that the reaction has been completed.
With 0.01 mol of sodium hydroxide used, the equivalent mole of sulfuric acid would be:
0.01/2 = 0.005 mol.
In other words, the number of moles of sulfuric acid in the solution would be 0.005 mol.
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Which one of the following is most likely to lose electrons when forming an ion?
Kr
C
Se
Zr
The element that is most likely to lose electrons when forming an ion is zirconium, Zr.
The correct option is D.
What are metals?Metals are elements that form positive ions by the loss of electrons.
Hence, metals are electropositive elements.
Some examples of metals are sodium, potassium, calcium, zirconium, etc.
The physical properties of metals include:
They are hard and shiny solidsThey have a characteristic lusterThey are malleable and ductile.The chemical properties of metals include their ability to react with dilute acids to produce hydrogen gas.
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If this diagram represents sugar in water, what factors affect solubility? (Choose all that apply.
stirring the mixture
temperature of the mixture
volume of container
using finer particles of sugar
If this diagram represents sugar in water -
temperature of the mixture, this factor affect the solubility.
What is solubility?The maximum quantity of a chemical that will dissolve in a given amount of solvent at a particular temperature is referred to as its solubility. A synonym for solvability is soluble.
If a solute is a solid or liquid, its solubility rises as the temperature rises. In comparison to cold water, hot water can facilitate the dissolution of sugar. A gas-based solute becomes less soluble as temperature rises. For instance, warm water may dissolve carbon dioxide more easily than cold water.
Thus, temperature of the mixture is the factor that affect the solubility.
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two of the following statements are true, select them. two of the following statements are true, select them. a hydrogen atom in the n
Radius of the second orbit is 4 times the radius of the first orbit.
KE∝ 1/n²
So, kinetic energy is maximum in 1st orbit.
(Radius)n ∝ n²/z
r2 = k(4); r1 = k(1)
∴ Radius of the second orbit is 4 times the first orbit.
What is radius?
If the object has no center, the term can refer to its circumferential radius, the radius of its circumscribed circle, or circumscribed sphere. In any case, the radius can be greater than half the diameter, which is usually defined as the maximum distance between any two points in the image. The radius of a geometric figure is usually the radius of the largest circle or sphere contained within it. The radius of a regular polygon is also called an apothem. In graph theory, the radius of a graph is minimal over all vertices at the maximum distance from u to any other vertex of the graph.To know more about radius, click the link given below:
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i want to be taught chemistry