Double displacement reactions occur when two compounds in a solution react to produce two new compounds by the exchange of their respective radicals. The term "double decomposition reaction" also applies to this kind of reaction.
When a more active ingredient pushes a less active element out of a molecule, this is known as a displacement reaction. A double displacement reaction is one in which the reactants swap ions, as the name implies. The common response is A + B - C A - C + B.
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what type of interaction would you expect between the side chains of each of the following pairs of amino acids in the tertiary structure of a protein?what type of interaction would you expect between the side chains of each of the following pairs of amino acids in the tertiary structure of a protein?
Dipole - dipole two cysteine interaction
What amino acid stabilizes the tertiary structure of a protein?
A protein's overall three-dimensional arrangement of its polypeptide chain in space is referred to as its tertiary structure. Internal interactions between nonpolar amino acid side chains and external polar hydrophilic hydrogen and ionic bond connections between polar molecules stabilize it frequently.
What is dipole-dipole interaction with example?
Examples of polar compounds that interact dipole-dipole include hydrogen chloride (HCl), carboxylic acids (such as acetic acid), and amino acids. A polar molecule's positive end will pull another molecule's negative end and change the other molecule's location.
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Which of the following statements correctly describe chemical kinetics? Select all that apply.Chemical kinetics describes chemical reactions using collision theory.Chemical kinetics is the study of reaction rates.Chemical kinetics measures how fast reactants are converted into products.
Understanding how quickly chemical reactions occur is the focus of the physical chemistry subfield known as chemical kinetics. In contrast to thermodynamics, which focuses on the direction in which a process takes place but says nothing about its rate, it is to be contrasted with this.
A chemical reaction is a procedure that causes one group of chemical components to change chemically into another. Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present). The study of chemical processes involving unstable and radioactive elements, where both electronic and nuclear changes may take place, is known as nuclear chemistry. Reactants or reagents are the substance(s) or substances that are initially utilized in a chemical reaction. Chemical reactions typically involve a chemical change and produce one or more products, which typically differ from the reactants in some ways. The details of the particular course of action are part of the reaction mechanism. Reactions frequently consist of a series of discrete steps, or elementary reactions. Chemical equations, which represent the initial substances, final products, and occasionally intermediate products as well as the reaction circumstances symbolically, are used to describe chemical reactions.
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Classify each of the following reactions as a precipitation, acid-base neutralization, or oxidation reduction Drag the appropriate items to their respective bins. 2HCN (aq) + Ca(OH),(aq) Ca(CN)2(aq) + 2H2O(1) NICI, (n) + Na,(na) - NIS(8) +2NaCl(aq) S:($)+80,(B) +880,() Precipitation Acid-base neutralization Oxidation reduction
Ca(CN)2 (aq) + 2H2O (l)
Here HCN is acid and Ca(OH)2 is base . Acid and base Neutralize and forms water.
Here also acid and base Neutralize and forms water.
Therefore This is acid-base neutralization reaction.
NiCl2 (aq) + Na2S (aq)
NiS(s) + 2 NaCl(aq)
In this reaction, precipitation of NiS occurs and hence this reaction is precipitation reaction.
Note: 's' in paranthesis represent solid i.e., precipitate.
S8 (g) + 8O2 (g).
Increase in Oxidation number is Oxidation and decrease in oxidation number is reduction.
Here , Oxidation number of S is increase from 0 to +4 and that of oxygen is decreses from 0 to -2 .
Hence this reaction is Oxidation-reduction reaction.
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what kind of intermolecular forces act between a chloroacetylene molecule and a fluoride anion? note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.
Dipole- Dipole force act between a chloroacetylene molecule and a fluoride anion.
Hydrogen bromide (HBr) and chlorine monofloride (CIF) are also highly polar compounds in this situation. Dipole intermolecular forces exist between polar molecules. In comparison to non-polar molecules, polar molecules are more likely to stick to their atomic neighbours and have higher boiling temperatures. The positive end of one polar molecule is pulled by the negative end of another polar molecule, and vice versa. Between molecules with permanent dipoles, there are dipole-dipole forces (i.e., polar molecules). These forces become stronger with increasing polarity for molecules with identical size and mass.
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Does oxygen make ionic bonds?
Oxygen can produce both ionic and covalent connections. Numerous oxides contain the oxide ion, O2 but water hydrolyzes it, making it impossible for it to reside there.
What kind of bonds does oxygen form?When it is in its elemental condition, oxygen is a diatomic molecule, like hydrogen. Only six electrons are available to each oxygen, thus two bonds must be formed by sharing these electrons. Double bonds serve as an illustration of this.
What is hydrogen and oxygen capable of forming ionic bonds?Detailed response and defense The hydrogen and oxygen atoms in water are covalently bound. This is because the difference in electronegativity between oxygen and hydrogen prevents the oxygen atom from completely stealing the electron from each hydrogen atom.
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A student obtains a liquid sample of green food coloring that is known to contain a mixture of two solid pigments, one blue and one yellow, dissolved in an aqueous solution of ethanol. Which of the following laboratory setups is most appropriate for the student to use in order to separate and collect a substantial sample of each of the two pigments?
chromatography column (long tube w/ ink seperating)
Chromatography column (long tube w/ ink seperating) is the most appropriate for the student to use in order to separate and collect a substantial sample of each of the two pigments.
An aqueous solution is an solution in which the solvent is water. It's mainly shown in chemical equations via appending to the relevant chemical system. For example, an answer of table salt, or sodium chloride, in water might be represented as Na? + Cl?.
The solvent in aqueous answers is water, which makes up approximately 70% of the mass of the human body and is important for lifestyles.
Some examples of aqueous solutions are cola, the saltwater, the rain, acid , base solutions, salt solutions, and so forth.
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The shape of the water molecule is unique with two hydrogen ions bonded to the side of the oxygen ion. This give water several unique properties. Select four of them.-Cohesion-Polarity-High specific heat-Adhesion-Colorless-Drinkable-Transparent
Water has some emergent properties that have a significant impact on life on Earth as a result of the extensive hydrogen bonding. These characteristics include ice's ability to float, cohesion, adhesion, high surface tension, high specific heat, and high heat of vaporization.
The ability of water to dissolve polar molecules, its high heat capacity and heat of vaporization, its cohesive and adhesive qualities, and its dissociation into ions that generate pH are just a few of water's unique properties.
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Which of the following describes the changes in forces of attraction that occur as H,O changes phase from liquid to vapor? H-0 bonds break as H - H and 0-0 bonds form_ Hydrogen bonds between H,O molecules are broken Covalent bonds between H,O molecules are broken Ionic bonds between H+ ions and OH- ions are broken Covalent bonds between H+ ions and H,O molecules become more effective
When a hydrogen atom is bound to a strongly electronegative atom and is in close proximity to another electronegative atom with a single pair of electrons, an intermolecular force (IMF) known as a hydrogen bond arises. This IMF is a particular sort of dipole-dipole attraction.
A sample's vapor pressure will rise as the temperature rises because the particles will have more energy to dispel the intermolecular forces keeping them in a liquid state.
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Write a balanced equation for each reaction.
a. HBr(aq) + KOH (aq)——>
b. HCl(aq) + NaHCo3(aq)—->
Answer:
a. The balanced equation for the reaction of HBr(aq) and KOH(aq) is: HBr(aq) + KOH(aq) → KBr(aq) + H2O(l)
b. The balanced equation for the reaction of HCl(aq) and NaHCo3(aq) is: HCl(aq) + NaHCo3(aq) → NaCl(aq) + H2O(l) + CO2(g)
Explanation:
Solved Which mineral will scratch fluorite but not feldspar?
A mineral with a hardness of 7 can scratch. Fluorite is unable to scratch feldspar, quartz, corundum, diamond, or any other mineral with a Mosh hardness greater than 4.
What is mineral?
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid compound with a fairly well-defined chemical composition and crystal structure that occurs naturally in its pure form.
Therefore, A mineral with a hardness of 7 can scratch. Fluorite is unable to scratch feldspar, quartz, corundum, diamond, or any other mineral with a Mosh hardness greater than 4. In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid compound with a fairly well-defined chemical composition and crystal structure that occurs naturally in its pure form.
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Identify the type of interactions involved in each of the following processes taking place during the dissolution of sodium chloride (NaCl) in water.
Drag the appropriate items to their respective bins.
Interactions involving water molecules and dipole-dipole interactions are examples of solvent-solvent interactions. interactions between sodium chloride ions or ion-ion attraction are examples of solute-solute interactions.
What is chloride and is it toxic to humans?Our bodies require significantly higher levels of chloride, one of the primary minerals, in order to be healthy. Chloride occurs naturally in a wide range of foods, however it is most frequently consumed as sodium chloride, popularly known as table salt.
What foods have a high chloride content?In table salt or sea salt, chloride is present as sodium chloride. Numerous veggies also contain it. Seaweed, rye, tomatoes, lettuce, celery, and olives are a few examples of foods having greater chloride content. Additionally, many meals include chloride and potassium.
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question at position 14 after you collect a fraction from the column, how do you remove the solvent to get the pure compound?
Remove the solvent by rotoevaporation. You should have a flask of free-flowing silica gel that you can pour on the top of your column. Add a layer of sand and elute as usual.
Solvents are a diversified group of chemical compounds that have the ability to water down, disintegrate, or disperse other substances. A solvent's ability to dissolve another molecule is determined by the molecule and physicochemical parameters of the solvent and the solute. Pure compounds are those contain just one type of particle and possess a simple design throughout. Pure compounds involve sugar, salt, and baking soda. Pure compounds include diamonds, protein crystals, and copper sulphate crystals.
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the oxidation of fadh2 to fad involves the transfer of ; the oxidation of nadh to nad involves the transfer of .
Transfer of two hydrogen atoms occurs during the oxidation of fadh2 to fad, whereas a hydride is transferred during the oxidation of nad+ to nad. when a chemical reaction of an atom to lose one or more of its electrons.
The chemical element with the atomic number 1 and symbol H is hydrogen. The element hydrogen is the lightest. Hydrogen is a gas made up of diatomic molecules with the formula H2 under normal circumstances. It has no flavour, no smell, no colour, is non-toxic, and is very flammable. The elementary electric charge of the electron, a subatomic particle, is a negative one. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically considered to be elementary particles.
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Which of the following statement is correct order of reactivity?
Na>Mg>Zn>Fe is the proper sequence of reactivity. Caesium is both the most electropositive element and the most reactive metal in the periodic table.
What is the correct order of reactivity among the following?According to their reactivity, metals are arranged as follows: K > Na > Ca > Mg > Al > Zn > Fe > Ni > Sn > Pb > H > Cu > Ag > Au. In light of this, the proper sequence is Fe > Ni > Sn > Pb > H > Cu > Au.
Why is the order of the reactivity series?A chart listing metals in decreasing order of reactivity is called the metals reactivity series. A metal generally reacts with other chemicals more forcefully the more reactive it is. the easier it is for positive ions to form when losing electrons (cations)
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When the nurse administers ethyl chloride to a client, which type of anesthesia is being administered?
Answer: Topical Anesthesia.
Explanation:
Topical anesthetics are used to treat ailments including small burns, insect bites, poison ivy, poison oak, poison sumac, and minor cuts and scratches that cause discomfort and irritation.
The nerve terminals in the skin are numbed by topical anesthesia. They don't render patients unconscious like general anesthetics used during surgery do. The majority of topical anesthetics are accessible over-the-counter, but your doctor may have specific recommendations for their usage and dosage given your particular medical condition.
A gas phase reaction is happening in a closed metal vessel. Identify the surroundings of the reaction. O The metal vessel The room The experiment O The gas
The metal vessel The room The experiment O The gas, The gas which evolve in the reaction is oxygen. A chemical process in which substances interact and transform into another substance.
What is reaction?
A chemical process in which substances interact and transform into another substance, or one substance transforms into another, is called a reaction.
Therefore, The metal vessel The room The experiment O The gas, The gas which evolve in the reaction is oxygen. A chemical process in which substances interact and transform into another substance, or one substance transforms into another, is called a reaction.
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a chemist burns 175g of solid magnesium in excess o2 gas. all of the metal reacts. He wants to know how many grams of the oxygen reacted?
Answer:
57.76 grams of oxygen reacted.
g give the cell notation for a voltaic cell consisting of a metallic iron electrode immersed in a solution of fecl2, and a metallic copper electrode immersed in aqueous cu(no3)2
For a voltaic cell made up of a metallic iron electrode submerged in a fecl2 solution, Fe(s)/Fe(aq)3+ is the anode and Cu2+/Cu(s) is the cathode. An electrochemical cell in which an electric current.
Is produced by spontaneous Oxidation-Reduction reactions is known as a galvanic cell or voltaic cell, respectively named after the scientists Luigi Galvani and Alessandro Volta. The term "electrode" refers to a conductor that is used to make electrical contact with a non-metallic component of a circuit. The cathode is the electrode from which a conventional current exits a polarised electrical device. The acronym CCD, short for Cathode Current Departs, can help you remember this definition. The movement of positive charges is referred to as a conventional current.
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What is the difference between metal, non-metal and metalloids
Metals : A collection of materials with high electrical and thermal conductivity and malleability is referred to as a metal. Three-quarters of the elements on the periodic table are metals.
Metalloids: The term "metalloids" refers to compounds whose properties fall somewhere between those of metals and nonmetals. Many of these substances are also known to be semiconductors, which indicates that they may conduct electricity under specific conditions. They are also frequently referred to as semimetals because, despite having some characteristics of metals, they do not meet the criteria for classification as metals.
Non metals: A nonmetal is a material that is recognized for having limited electrical and heat conductivity, as well as being brittle rather than particularly malleable. Compared to metals, they make up a far smaller percentage of the periodic table's elements, yet nonmetals are more prevalent than metalloids.
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Why starch peanut doesn't dissolve in acetone
Peanut doesn't dissolve in acetone because the crosslinking structure of polystyrene can be broken down in some organic solvents such as acetone.
What is acetone?
Acetone, is described as an organic compound with the formula (CH₃)₂CO which is the simplest and smallest ketone.
Acetone is known to be colorless, highly volatile and flammable liquid with a characteristic pungent odor.
When the polystyrene peanuts are added to the acetone, they do not really dissolve in the acetone, but instead go through a process called “swelling” that allows the trapped gases to escape.
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Using the table Melting and Glass Transition Temperatures for Some of the More Common Polymeric Materials, which of the following polymer(s) would be suitable for the fabrication of cups to contain hot coffee: (a) polyethylene, (b) polypropylene, (c) poly(vinyl chloride), (d) polystyrene, (e) polycarbonate, and (f) PET polyester? O (a) and (d) O only (e) (a), (b), and (c) (b), (c), (f), and (e) O (d) and (e)
Probably a little below 100°C (212°F) is the maximum temperature for hot coffee. Only polycarbonate and polystyrene have glass transition temperatures of 100°C or higher (Table 15.2), making them the only polymers on the list that would work for this application.
The temperature at which an amorphous polymer transitions from a hard, glassy state to a soft, leathery state, or vice versa. Tg is a direct correlation between a material's strength and capabilities in a specific end-use application.
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Air and water are both considered to be ________
Air and water are both considered to be _elements.
What are elements ?A basic thing that is difficult to divide into smaller parts is known as an element. Unbreakable by non-nuclear reactions, an element is a material in chemistry and physics. An element is a unique component of a bigger system or set in mathematics and computing. Atoms of at least one or more different elements can be found in everything in the cosmos. The elements with comparable properties are grouped together in the periodic table, which contains a list of every known element.
The elements include things like iron, gold, silver, oxygen, and hydrogen. A single atom form makes up every element.
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Since water and air are each a gas and just a liquid, those who are both fluids, as are all liquids and gases.
What are liquids, and what varieties exist?Pure liquid & liquid mixtures are the two main categories into which liquids can be separated. Water is the most prevalent liquid on Earth, yet a lot of the water that microorganisms come into direct contact with isn't pure water; instead, it's a slurry in which different compounds are dissolved.
Which seven liquids are there?40:18 Seven liquids are involved in this matter: wine, bee syrup, olives, milk dew, animal or avian blood, and water. Blood may not often be consumed, but in this case, it was because it had possibly been used in a medical treatment.
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correctly order the steps necessary to calculate the mass of product formed in a chemical reaction, given the masses of all reactants. start with the first step at the top of the list.
To write a balanced equation for the reaction we
Convert the given mass into moles using molar mass.Convert moles of A to moles of B using a conversion factor derived from the balanced equationConvert most of the 2nd substance to mass using its molar math.Mass of products is equal to mass of reactants. This equation can be read in “moles” by placing the word “moles” between each coefficient and formula. A mole-mole factor is a ratio of the moles for any two substances in an equation. Reactants are starting materials and are written on the left-hand side of the equation. Products are the end result of the reaction and are written on the right-hand side of the equation.Use mole ratios to calculate the number of moles of product that can be formed from the limiting reactant. Multiply the number of moles of the product by its molar mass to obtain the corresponding mass of product
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The vapor pressure of water at 5C is 6.55 toor. Calculate the vapor pressure in mm Hg and atm . Round each of your answers to 3 significant digits.
Answer: 6.55 mmHg, 0.00862 atm
Explanation:
1 mmHg is equal to 1 torr, so those two values are the same thing.
1 atm is 760 torr, we can find the atm value by (6.55)/(760)=0.00862 atm.
What happens to the temperature of the water when you dissolve salt on it?; Why did the temperature go down when dissolving the second salt?; Is dissolving salt in water exothermic or endothermic?; When an endothermic reaction occurs in a water solution the temperature of the solution?
Because the products of an endothermic reaction are more energetic than the reactants, heat energy is absorbed. The temperature drops as a result of this absorption of heat energy.
Any thermodynamic process with an increase in the enthalpy H (or internal energy U) of the system is referred to as an endothermic reaction in thermochemistry (from the Greek v (endon) "inside" and -(therm) "hot, warm"). A closed system often transfers heat into itself during such a process by absorbing thermal energy from its surroundings. As a result, an endothermic reaction typically results in a rise in the system's temperature and a fall in the environment's. It could involve a chemical reaction, such when ammonium nitrate (NH4NO3) is dissolved in water (H2O), or a physical action, like when ice cubes melt.
French scientist Marcellin Berthelot first used the word in the 1800s. An exothermic process is the opposite of an endothermic process.
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6. A pigeon was 240 meters south of an apartment building. The pigeon then flew north at a constant
velocity, and in 15 seconds, it had flown halfway to the apartment building. What was the pigeon's
velocity?
The pigeon's velocity is 68.62 m/s.
How to calculate velocity?Velocity in physics is a vector quantity that denotes the rate of change of position with respect to time, combining speed with a directional component.
The velocity of an object can be calculated using one of the equations of motion as follows:
v² = u² + 2as
According to this question, a pigeon was 240 meters south of an apartment building. The pigeon then flew north at a constant velocity, and in 15 seconds, it had flown halfway to the apartment building. The velocity of the pigeon can be calculated as follows;
v² = 0² + 2(9.81)(240)
v² = 4707.8
v = ✓4708.8
v = 68.62m/s
Therefore, 68.62 m/s is the pigeon's velocity.
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Calculate the heat, in kJ, that would be involved in condensing 22.5 g of CH₃OH. (∆Hvap = 38.0 kJ/mol)
Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, 12.401KJ of heat is required to condense 22.5 g of CH₃OH.
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.
Mathematically,
q = n ×ΔH
where
q = amount of heat= ?
n = no of moles
number of moles of CH₃OH = 22.5 g ÷32.04 g/mol
number of moles of CH₃OH = 0.70 moles
ΔH = enthalpy =38.0 kJ/mol
Substituting all the given values, we get
q = n ×ΔH
= 0.70 ×38.0
= 12.401 kJ
Therefore, 12.401KJ of heat is required to condense 22.5 g of CH₃OH.
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in which of the following compounds is the oxidation number of s equal to 4? question 15 options: a) h2s b) na2so3 c) mgso4 d) s8 e) s2cl2
containing sulfur and having a bonus oxidation state The two SOCLs are. The word "oxidation" was first used to describe an object's reaction with oxygen by Antoine Lavoisier.
What takes place during oxidation?When oxygen reacts with a material or an element, an oxidation process occurs. Another meaning of oxidation is the elimination of hydrogen from reactant species. When a molecule, moiety, or ion loses electrons, it goes through oxidation
What can be said about oxidation?By losing electrons in a reaction, a reactant is said to have undergone oxidation. When a reactant undergoes a reaction, reduction is the procedure through which it picks up electrons. When metals plus acids interact, this happens regularly. When a reactant loses electrons, the process is referred to in science as oxidation.
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How many neutrons does cobalt have if its atomic numbers is 27 and its mass number is 59?; How many protons neutrons and electrons are there of cobalt has an atomic number of 27 a mass number of 58 and a charge of 3?; How many neutrons are present if cobalt has an atomic number of 27 a mass number of 59 and a charge of 3?; What is the number of protons of cobalt if it has a number of 27 in atomic number?; How many neutrons does an atom have if its mass number is 27 and it has 13 protons?; How many neutrons in atomic number is 27?
for the above example there are 27 protons, 31 neutrons, 27 electrons
Atomic number is equal to the number of protons and equal to the number of electrons. So 27 = number of protons = Number of electrons. Mass number is the sum of the number of proton and neutrons Mass number = 58 = Number of proton + Number of neutrons .Number of neutrons = Mass number - Number of protons 58-27=31 The charged amount of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number. For conventional nuclei, this is equivalent to the proton count or the amount of protons in the nucleus of every atom in that element
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wavelength and frequency practice problems with answers; calculate the frequency of light that has a wavelength of 4.25 x 10-9m; calculate the number of photons having a wavelength of 10.0 m required to produce 1.0 kj of energy; wavelength frequency and energy practice problems answers; wavelength, frequency and energy problems worksheet; wavelength frequency and speed of light practice problems; calculate the total energy in 1.5 x 1013 photons of gamma radiation having ฮป = 3.0 x 10-12 m.; chemistry wavelength and frequency practice problems
The frequency of light is 7.5 x 10¹⁶ Hz or 75 PHz that has a wavelength of 4.25 x 10-9m .
What is the formula of frequency of light?The formula frequency=c/v, where c is the speed of light, equals 2.998 x 108 m s-1. Wavenumber, or =1/, is another statistic that you will frequently see. It is typically expressed in units of cm-1. E = hc = 1.986 1016 J nm photon 1 gives the energy of a single photon with the wavelength [6]. .2a]Formula: c = f where: c = the speed of light = 300,000 km/s or 3.0 x 108 m/s. = the wavelength of light, usually measured in meters or Ångströms (1 Å = 10-10 m) f = the frequency at which light waves pass by, measured in units of per seconds (1/s).It can be said to have a wavelength and a frequency. a wavelength. of light is the distance and frequency between identical points in two subsequent light cycles.Problem 1
Velocity of a light wave = 3 x 10⁸ m/s
Given
Wavelength (λ) = 4 x 10⁻⁹ mVelocity (V) = 3 x 10⁸ m/sFrequency (f) = ?
f = V / λ
f = (3 x 10⁸ m/s) / (4 x 10⁻⁹ m)
f = 7.5 x 10¹⁶ Hz or 75 PHz
Problem 2
We have to calculate the number of photons having a wavelength of 10μm required to produced 1 kJ of energy.
we know, “Energy of each photon is inversely proportional to wavelength”. and energy of photon is given by, E = hc/λ ,
where h is plank's constant, c is the speed of light and λ is wavelength.
here, wavelength , λ = 10μm = 10¯⁵ m
speed of light in vacuum, c = 3 × 10^8 m/s
plank's constant , h = 6.63 × 10¯³⁴ J.s
let number of photons = n
⇒Total energy = n × energy of each photon
⇒1 kJ = n × (6.63 × 10¯³⁴ × 3 × 10^8)/(10¯⁵)
⇒10³ = n × 19.89 × 10¯²¹
⇒n = 1/19.89 × 10²⁴ ≈ 5 × 10²²
Therefore the number of photons required to produced 1 kJ energy is 5 × 10²².
find the attachment of Problem 3
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