Many factors make it extremely difficult to analyze patterns in terrorism. Simply said, there is a severe paucity of comparable and trustworthy data, and there is a tendency to compartmentalize analyses to address specific threats, countries, and regions. When the analysis tries to address topics as sensitive as the connections between Islam and terrorism, the issue becomes even worse.
How Islam is affected as a religion by the global terrorism?Nearly all of the governments of the engaged nations are actively battling terrorism, and the majority are allies of Western nations who collaborate closely with the security, armed forces, and anti-terrorist organizations of non-Muslim nations.
Muslims around the world differ greatly not just in terms of their religious beliefs but also in terms of their political and societal philosophies, including how they perceive the government, the law, and human rights; what they believe should be taught in schools; and whether or not they are violent.
Thus, global terrorism has affected the Islam as a religion in the eye of world.
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Chlorine gas (Cl2) reacts with solid calcium (Ca) to form solid calcium chloride (CaCl2). Write a balanced chemical equation for this reaction
A balanced chemical equation for this reaction would be 1 mole of Ca reacting with 1 mole of Cl2 to produce one mole of CaCl2.
A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reactant and product side of the reaction and the total charge are the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.
In the formation of calcium chloride reaction we can see that Calcium is reacting with chlorine molecule to form a calcium chloride molecule. From the balanced chemical reaction we can see that one mole of calcium reacts with one mole of Cl2 to form one mole of calcium chloride molecule. The reaction is given below
Ca + Cl2 ⇄ CaCl2
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A solution was found to have a 15. 6 % transmittance at 500 nm, its wavelength of maximum absorption, using a cell with a path length of 5. 00 cm. Calculate the absorbance of the solution in a 1. 00 cm cell at 500 nm.
The correct answer is 0.16138
Solution:
Percentage transmission (%T) of the sample = 15.6
Therefore, Absorbance (A) 2 – log (%T) = 2 – log (15.6) = 0.8069
Use Beer’s law:
A = ε*c*l where ε = molar absorptivity of the solution, c = concentration of the solution, and l = path length of the solution.
Given A = 0.8069 and l = 5.00 cm, we must have
0.8069 = ε*c*(5.00 cm)
ε*c = 0.16138 cm-1
For the next part, assume that ε*c remains constant and we have
A’ = ε*c*l’ where l = 1.00 cm.
Plug in values and write
A’ = (0.16138 cm-1)*(1.00 cm) = 0.16138
The ratio of the light intensity entering the sample to the light intensity exiting the sample at a particular wavelength is defined as the transmittance. Absorption and transmission are two related and different quantities used in spectroscopy. The main difference between absorption and transmission is that absorption measures how much incident light is absorbed as it travels through the material, while transmission measures how much light is transmitted.
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PLEASE HELP FAST 30 POINTS!!! YOU WILL SAVE MY LIFE TY TY TY!!!!!!
In the Lewis structure of acetic acid, there are 7 sigma bonds and 1 pi bond. Sigma bonds are the strongest covalent bond while pi bonds are covalent bonds where orbitals overlap laterally.
What are Lewis structures?Lewis structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .
They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.
They are capable of reflecting electronic structure of elements and even the pairing of electrons . In the diagram, each dot represents an electron while a pair of dots represent a bond between the atoms.
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Melting an ionic solid involves freeing the ions from their positions in the ionic crystal and separating them. Since the ions are held together by _____ electrostatic attractions, the amount of energy required is _____ and ionic solids therefore have relatively _____ melting points.
Melting an ionic solid involves freeing the ions from their positions in the ionic crystal and separating them. Since the ions are held together by strong electrostatic attractions, the amount of energy required is large and ionic solids therefore have relatively high melting points.
What are ionic Solids?
The crystalline solids are formed by neatly packed ions of opposite charge. Ionic compounds are formed when metals react with non-metals.Ionic solids are held together by electrostatic attraction between the positive and negative ions.Due to presence of electrostatic forces of attraction between ions, a large amount of energy is required to break the ionic bonds between the atoms. Thus, ionic compounds have high melting and boiling points.In a reaction between metals and non-metals, metals loose electrons to complete their octet while non-metals gain electrons to complete their octet. Metals and non-metals react to form ionic compounds.Learn more about ionic compounds at https://brainly.com/question/2687188
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gaseous methane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . suppose 0.962 g of methane is mixed with 1.2 g of oxygen. calculate the maximum mass of water that could be produced by the chemical reaction. be sure your answer has the correct number of significant digits.
The maximum mass of produced will be, 2.16 grams
What is molar mass ?
In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance. This is the number of moles of that sample measured in moles. Molar mass is a mass property, not a molecular property of a substance. Molar mass is the average of many instances of a compound, which often differ in mass due to the presence of isotopes. Most commonly, molar mass is calculated from standard atomic masses, so it is a global average and a function of the relative isotopic abundances of constituent atoms on Earth. Molar mass is good for converting between the mass of a substance and the quantity of a bulk substance.
Mass of Methane = 0.962 g
Mass of oxygen= 1.2 g
Molar mass of Methane= 16 g/mole
Molar mass of Oxygen = 32 g/mole
Molar mass of Water = 18 g/mole
First we have to calculate the moles of and .
Now we have to calculate the limiting and excess reagent.
Moles of methane = 0.962 g/16 g/mole=0.060
Moles of oxygen = 1.2 g/32 g/mole=0.04
As, 1 moles of CH₄ react with 2 mole of O₂
So, 0.06 moles of methane react with 2 x 0.04 = 0.08 moles of oxygen
From this we conclude that, Oxygen is an excess reagent because the given moles are greater than the required moles and methane is a limiting reagent and it limits the formation of product.
Now we have to calculate the moles of .
As, 1 mole of react to give 2 moles of
So, 0.06 moles of methane react to give 0.06 x 2 = 0.12 moles of
Therefore, the maximum mass of produced will be, 2.16 grams.
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Which section most clearly supports the generalization that everyone uses the amazing substance known as glass?.
Option B. section seven most clearly supports the generalization that everyone uses the amazing substance known as glass.
In section 7 It turned via these natural occasions that human beings observed the superb substance called glass. After its discovery, human beings began manufacturing glass and its use of it for plenty of sensible and creative functions. today, glass is a crucial part of our everyday lives.
Glass is a non-crystalline, frequently transparent, amorphous solid that has huge practical, technological, and ornamental use in, for instance, window panes, tableware, and optics. Glass is most often formed by means of rapid cooling of the molten shape; some glasses consisting of volcanic glass are obviously taking place.
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Disclaimer:- your question is incomplete, please see below for the complete question.
Which section most clearly supports the generalization that everyone uses the amazing substance known as glass?
A) section three
B) section four
C) section five
D) section seven
How many moles of Al are necessary to form 35.2 g of AlBr₃ from this reaction: 2 Al(s) + 3 Br₂(l) → 2 AlBr₃(s) ?
Based on the mole ratio, the number of moles of Al required to produce 35.2 g of AlBr₃ is 0.13 moles.
What is the mole ratio of the reaction?The mole ratio of the reaction is the ratio in which moles of reactants combine to form moles of product.
The mole ratio is obtained from the equation of the reaction.
Considering the given reaction equation below:
Al(s) + 3 Br₂(l) → 2 AlBr₃(s)
1 mole of Al produces 2 moles of AlBr₃ when reacted with 3 moles of Br₂
Molar mass of AlBr₃ = 267 g
Molar mass of Al = 27 g
Moles of Al required to produce 35.2 g of AlBr₃ = 35.2 * 27/267 * 1 mole/27
Moles of Al required to produce 35.2 g of AlBr₃ = 0.13 moles of Al
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What makes an atom radioactive? (2 points)
Its electrons are easily pulled away.
Its protons and electrons repel each other.
Its nucleus can easily break apart over time.
Its neutrons are held more strongly than its protons.
Please help me answer this question
Answer:
Q2 Ga3+
Q3 There are no gaps/sticks between the potassium ions and the sulfur ions.
Explanation:
fill in the blank question. gram-positive and gram-negative are among the most significant infectious agents of humans.
Gram-positive and gram-negative cocci are among the most significant infectious agents of humans.
What are the important differences between gram-positive and gram-negative bacteria?Grаm-positive bаcteriа аre bаcteriа clаssified by the colour they turn in the stаining method. Hаns Christiаn Grаm developed the stаining method in 1884. The stаining method uses crystаl violet dye, which is retаined by the thick peptidoglycаn cell wаll found in grаm-positive orgаnisms. This reаction gives grаm-positive orgаnisms а blue colour when viewed under а microscope. Аlthough grаm-negаtive orgаnisms clаssicаlly hаve аn outer membrаne, they hаve а thinner peptidoglycаn lаyer, which does not hold the blue dye used in the initiаl dying process. Another informаtion used to differentiаte bаcteriа is the shаpe. Grаm-positive orgаnisms hаve а thicker peptidoglycаn cell wаll compаred with grаm-negаtive bаcteriа. It is а 20 to 80 nm thick polymer while the peptidoglycаn lаyer of the grаm-negаtive cell wаll is 2 to 3 nm thick аnd covered with аn outer lipid bilаyer membrаne.
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What are some practical uses for metallic changes?
Some practical uses of metallic change are : electrolysis, heating of silver coin and melting.
What are some practical uses of metallic changes?Practical application of metallic change is electrolysis. Charge is conducted through metals. In electrolysis, input of energy is needed to force a nonspontaneous redox reaction.
When the silver-colored penny is heated, zinc atoms outside and copper atoms inside move around because of the heat. This results in the outer layer of zinc mix with the copper which becomes an alloy called yellow brass.
Melting is an example of a physical change. A physical change is a change to a sample of matter where some properties of the material change but the identity of the matter does not.
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An orange solid cannot be broken down into simpler components by any physical methods. When it is heated, a chemical reaction takes place and a colorless gas and a silvery liquid form. Further tests on the resulting substances shows that they cannot be broken down further by physical or chemical methods. What type of substance is the original orange solid?.
Type of substance is the original orange solid is element .
What is chemical reaction ?
Chemical reaction, the process by which one or more substances (reactants) are transformed into one or more other substances (products). Substances are either chemical elements or compounds. Chemical reactions rearrange the constituent atoms of reactants to produce different substances as products.
Chemical reactions are an integral part of technology, culture, and even life itself. Fuel combustion, iron smelting, glass and pottery making, beer brewing, and wine and cheese making are just a few examples. Activities involving chemical reactions that have been around for thousands of years. Chemical reactions are abundant in a variety of complex processes that occur in Earth's geology, atmosphere and oceans, and in all biological systems.
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if 250 ml of methane, ch4, effuses through a small hole in 28 s, the time required for the same volume of helium to pass through the hole under the same conditions will be
To find the volume, known grahams law of diffusion.
What is grahams law of diffusion?
The rate of diffusion or effusion of a gas is inversely related to its square root of molar mass, according to Graham's Law. The majority of the time, particles in a material that are in a low-concentration area will move to a high-concentration area. When we spray scented air freshener or perfume in one area of the room and then we can smell it throughout the entire space, this process is easily illustrated. The SI unit for the diffusion coefficient is square meters per second (m2/s).
What is Volume ?
The amount of cubic space a three-dimensional object takes up (measured in inches, quarts, or centimeters): square footage.
Therefore, the same volume of helium to pass through the hole under the same conditions will be same.
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if the concentration of nacl is 7.61 m, when it begins to crystallize out of solution, then what is the ksp? ksp
If the concentration of NaCl is 7.61 m, when it begins to crystallize out of solution, then the Ksp is 57.91.
The dissociation reaction of NaCl is given as:
NaCl → Na⁺ + Cl⁻
7.61 7.61
The Ksp for the following is given as :
ksp = [Na⁺] [Cl⁻]
⇒ksp = 7.61 × 7.61
⇒ksp = 57.91
When a solid substance dissolves into an aqueous solution, it posses a equilibrium constant which is known as solubility product constant, Ksp. The solubility product constant Ksp increases with increase in temperature and with increase in the solubility.
Thus, If the concentration of NaCl is 7.61 m, when it begins to crystallize out of solution, then the ksp is 57.91 .
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A chemist is trying to determine the molar mass of an unknown substance. What is the molar mass of this substance if she finds that 30.8 g contains 7.180x10^23 molecules?
I know the answer is 25.8, but I need to know the work needed to be done to get there.
Answer:
Explanation:
n=m/M=N/Na
where m represents mass
M represents molar mass
N represents Number of molecules
Na is avogadros constant which is denoted as 6.02*10^23
30.8/M=7.180*10^23/6.02*10^23
30.8/M=1.1927
M=30.8/1.1927=25.1g/mol
why does the alkane not change color? choose all that apply. it is non reactive to bromine. it is reactive to bromine. there is no electron density for it to serve as an electrophile. there is no electron density for it to serve as a nucleophile.
Alkane hydrocarbons will not cause dissolution of bromine because alkanes do not have double bonds so they will not undergo addition reactions. Since alkanes do not have double bonds the red color of bromine does not change. The reaction that may occur in alkanes with bromine is a substitution reaction.
Addition ReactionAddition reactions are reactions that break a double bond. It can be used to distinguish alkenes from alkynes. This recognition reaction is carried out by adding bromine which is red brown. The addition reaction was indicated by the disappearance of the red-brown color from the bromine. The addition reaction was indicated by the disappearance of the red-brown color from the bromine.
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Naturally occurring iron has four isotopes. A-53.9396 amu 5.82%, B-55.9349 amu 91.66%, C-56.9354 amu 2.19%, and D-57.9333 amu 0.33%. Calculate the atomic mass of iron from these data.
Considering the definition of isotopes and atomic mass of an element, the atomic mass of iron is 55.9012 amu.
Definition of isotopeAn isotope is a form of a chemical element in which the atoms have the same number of protons, but a different number of neutrons.
Definition of atomic massThe atomic mass of an element is the weighted average mass of its natural isotopes, considering the relative abundance of each of them.
Atomic mass of ironIn this case, you know iron has four isotopes:
A- An isotope with a mass of 53.9396 amu and an abundance of 5.82%.B- An isotope with a mass of 55.9349 amu and an abundance of 91.66%.C- An isotope with a mass of 56.9354 amu and an abundance of 2.19%.D- An isotope with a mass of 57.9333 amu and an abundance of 0.33%.Then, the atomic mass of iron can be calculated as:
atomic mass of iron= 53.9396 amu×0.0582 + 55.9349 amu×0.9166 + 56.9354 amu×0.0219 + 57.9333 amu×0.0033
atomic mass of iron= 55.9012 amu
Finally, the atomic mass in this case is 55.9012 amu.
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A mountaineer is planning an expedition. He wants to follow the easiest possible path, which means he needs to find the most gentle slope up the mountain. Which route should the mountaineer choose?
The route that the mountaineer should choose from the graph is route A.
Who is a mountaineer?The term mountaineer has to do with a person who is a specialist in the process of climbing mountains. Such a person does know the various routes around a mountain and how to get to the peak of the mountain very easily.
In this case, we have to consider the steepness of each of the paths as we can see from the graph. The steeper the mountain path that is chosen the broader it is and the easier it is for the mountaineer to climb the mountsin successfully.
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Missing parts;
A mountaineer is planning an expedition. He wants to follow the easiest possible path, which means he needs to find the most gentle slope up the mountain. Which route should the mountaineer choose?
A.Route A
B.Route B
C.Route C
D.Route D
a solution containing agno 3 is mixed with a solution of nacl to form a solution that is 0.10 m in agno 3 and 0.075 m in nacl. what will happen once these solutions are mixed? ksp (agcl)
When a solution containing AGNO3 is mixed with a solution of NACl AgCl will precipitate because Q > Ksp. Silver chloride will precipitate out of solution, leaving an unsaturated solution of AgCl.
Explain molarity?
A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The moles per litre, is expressed by the unit symbol mol/L or mol/dm3 in SI units.Information provided according to:
As a result, AgNO3's molarity is 0.10 M.
Following that, NaCl's molarity is equal to 0.075 M.
Thus, Ksp AgCl is equal to 1.77 * 10^-10.
Then the variables in the equation are as follows:
AgNO3 + NaCl AgCl(s) + NaNO3 (aq)
Next, we have 0.10 moles of Ag+ for every 0.10 moles of AgNO3 (molarity is equal to 0.10 M).
Following that, we have 0.075 moles of Cl- (molarity is 0.075 M) for 0.075 moles of NaCl.
Now, we compute Q, which is:
So Q is = [Ag+][Cl-]
In the following, Q is equal to (0.10 M)(0.075 M) = 0.0075.
Currently, Ksp is 1.77 x 10-10.
Q >>> Ksp.
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Krypton atoms in the ground state tend not to bond with other atoms because their?.
Krypton atoms in the ground state tend not to bond with other atoms because they have a total of 8 electrons in their valence shell.
Krypton is a rare noble gas thus it does not react at ground state because its shell is complete. The atomic number of krypton is 36. It is three times heavier than air. It is not totally unreactive as it can form some compounds. krypton is colorless, odorless, and tasteless.
According to the octet rule, the last shell of krypton is completely filled so it will not form a bond with another atom.
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A total of eight valence electrons makes krypton atoms to not bnd with other atoms.
Moreover, An atom changes from its ground state to an excited state by taking in energy from its surroundings in a process called absorption. An electron absorbs energy and jumps to a higher energy level. In the opposite process, emission, the electron returns to its ground state by releasing the extra energy it absorbed.
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difference between steam distillation and fractional distillation
According to the research, the correct answer is that steam distillation the components of a mixture are separated by direct injection of steam while in fractional distillation vaporization and condensation occur successively.
What is distillation?It is a process that allows the separation of mixtures in the liquid phase into their individual components.
In this sense, fractional distillation requires a fractionating column and is used when the boiling points of the volatiles in the liquid mixture are below 80 °C.
On the other hand, steam distillation is used to purify or isolate the compounds whose boiling point is very high based on a steam separation.
Therefore, we can conclude that in steam distillation a current of water vapor is passed while in fractional distillation a vaporization and condensation of the volatile component is carried out.
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What is the formal charge on the central nitrogen atom in the most favorable lewis structure for the fulminate ion, cno–, based on minimizing formal charge overall?.
The formal charge of the central nitrogen atom of dinitrogen sulfide is +1.
Formal charge refers to the presence of electrons on an atom when absent and present in the molecule.
Lewis structure is The structural representation of a compound in which the electrons existing around the atom are represented by points is called the Lewis point structure.
Three possible Lewis structures of dinitrogen sulfide are shown below.
But the best Lewis structure of these is the first. The central nitrogen atom has a positive charge and the sulfur atom has a negative charge. The charges on these atoms are the most stable and make compounds stable.
Therefore, the central nitrogen atom has a formal charge of +1.
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the reduction of iron(iii) oxide () to pure iron during the first step of steelmaking, is driven by the high-temperature combustion of coke, a purified form of coal: suppose at the temperature of a blast furnace the gibbs free energies of formation of and are and , respectively. calculate the maximum mass of pure iron that can be produced by the combustion of of coke. (one metric ton, symbol , equals .) round your answer to significant digits.
The maximum mass of pure iron that can be produced by the combustion of coke is 3.9 × 10⁶ kg.
Combustion, or burning, is a high-temperature exothermic redox chemical reaction between gasoline and an oxidant, generally atmospheric oxygen, that produces oxidized, regularly gaseous products, in a combination termed as smoke. combustion, a chemical reaction between materials, typically consisting of oxygen and normally observed by way of the era of warmth and mild inside the shape of a flame.
A combustion reaction is a sort of chemical reaction wherein a response between any flammable substance and an oxidizer takes area as a way to shape an oxidized product. Combustion reactions are regularly followed via fires and the discharge of power in the form of warmth.
Calculation:-
2Fe₂O₃ ------> 4Fe(s) + 3O₂
C(s) + O₂ -------> CO₂ ₓ 3
________________________
2Fe₂O₃ + 3C(s) ------------> 4Fe + 3CO₂(g)
mass of coke = 630 . t
= 630 × 1000
= 6.3 × 10⁵
So, 3 × 12g og Coke = (4 × 56)/3×12 kgFe
= 39.2 × 10⁵ kg Fe
= 3.9 × 10⁶ kg
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Benzene, a cancer-causing chemical, was recently detected in several batches of what product?.
Benzene , a cancer causing chemical was recently detected in several batches of dry shampoo products.
Cancer Causing materials are carcinogens and genetics. This can increase risk of developing cancer.Cancer is caused by changes of genes that changes the way of cell function.Some occur naturally when DNA is replicated during cell function.But some occur by the environmental exposure that damages DNA.
All substances that cause cancer are called carcinogens.According to the report of the national toxicology programme (NTP), benzene is a carcinogen,cancer causing chemical. High levels of benzene can cause cancer.High levels of benzene have been detected in several batches of dry shampoo products.Carcinogene which can cause cancer by acting with another chemical.
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if i know neons atomic number is 10, what do i now know about the number of protons and electrons that neon contains?
Answer:
10
Explanation:
the atomic number shows how many protons and electrons there are
a common polymorphism in the us population is a variant o n5,n10-methylene-fh4 reductase, which has a reduced activity as compared to the normal enzyme. a person expressing this variant enzyme would have difficulty producing which one of the following
The thymine nucleotide is required for DNA synthesis.
The only pyrimidine that requires folate for its synthesis is thymine. Folate is required for the incorporation of carbons 2 and 8 into all purine molecules. The synthesis of creatine phosphate and of phosphatidylcholine does not require folate. Folate deficiencies during pregnancy can lead to neural tube defects in the fetus.
Deoxyribonucleotide synthesis requires ribonucleotide reductase which uses thioredoxin and does not require a folate derivative. Genetic variability of drug-metabolizing enzymes and drug transporters has been related to interindividual variations in pharmacokinetics and pharmacodynamics. Such differences might also result in variants in drug efficacy safety and remedy effects in some of the often prescribed drugs3.
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What is the frequency of a 4,600 cm wave?
The frequency of a 4,600 cm wave is 652 Hz
Frequency is the number of waves that pass a fixed point in unit time
Here given data is
Wave = 4,600 cm = 4.6 × 10⁸ nm
We have to calculated frequency = ?
Frequency =v = c/λ
Frequency = 3×10⁸m / 4.6 × 10⁸ nm
Frequency = 652 Hz
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7. The local police department just bought a Reflected Ultraviolet Imaging System (RUVIS) device. What is MOST likely the purpose of this purchase?
to test DNA from blood in their lab
to individualize hair samples
to determine if blood is human or animal
to find and process more fingerprints
The most likely purpose of the purchase of a Reflected Ultraviolet Imaging System (RUVIS) device by the local police department is: to find and process more fingerprints.
What is Digital forensics?Digital forensics can be defined as a type of technology which is designed and developed to gather, access, and monitor the activities of a particular user or users on a computer system, networks, and other devices over the Internet such as a Reflected Ultraviolet Imaging System (RUVIS).
Generally speaking Reflected Ultraviolet Imaging System (RUVIS) simply refers to an optical touchless instrument that is designed and developed to be used by crime scene search investigators and the police for the detection of latent fingerprints without making use of any of the following chemical substances:
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If sodium (na) has 4 neutrons, 3 protons, and 2 electrons, which would be the correct ion symbol?.
According to electronic configuration, the correct symbol for sodium with 4 neutrons, 3 protons, and 2 electrons is Na-2.
What is electronic configuration?
The distribution of electrons in atomic or molecular orbitals within an atom or molecule is referred to as its electronic configuration. It explains how every electron in an orbital move on its own.
For understanding the period table, one needs to know about electronic configuration. It aids in comprehending the chemistry of various elements.
For an element to become stable, chemical reactions must take place. The transition elements adhere to the 18-electron rule, whereas the main group elements follow the octet rule in their electrical arrangement. Noble elements are thought to be stable because their valence shells are finished in the ground state.
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What is the first element to have a different number of protons and neutrons in the nucleus?.
Hydrogen is the first element to have a different number of protons and neutrons in the nucleus.
Hydrogen (H), a gaseous material that is colorless, odorless, tasteless, and flammable, is the most basic chemical element. A proton with one unit of positive electrical charge and an electron with one unit of negative electrical charge make up the hydrogen atom's nucleus.
Hydrogen makes up just around 0.14 percent of the weight of the Earth's crust, despite being the most common element in the universe and three times as abundant as helium, the next most frequent element. The water in oceans, ice caps, rivers, lakes, and the atmosphere all contain significant amounts of it.
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