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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Question 4 (5 points)
Which of the following statements about the partial charge in the compound CIF is
correct?
O
F will have a partial negative charge, and CI will have a partial positive charge.
OF and Cl will have partial positive charges.
OF and Cl will have partial negative charges.
F will have a partial positive charge, and CI will have a partial negative charge.
Answer:
Explanation:
the second option I believe
3. compare the mass of zinc produced on the iron nail to the mass of zinc lost from the zinc electrode. comment on any similarity or difference observed.
The no loss of mass in the Mass of zinc produced in a iron nail is similar equal to the Mass of Zn consumed.
What is mass?
It is the most fundamental characteristic of matter and one of the basic physical quantities. The amount of matter in a body is measured by its mass. Kilogram is the SI-defined mass unit (kg). It should be noted that a body's mass never changes.
What is zinc?
One of the most extensively used metals is zinc (Zn), a chemical element that is a low-melting metal of Periodic Table Group 12 (IIb, or the zinc group). Zinc is a necessity for life.
Mass of zinc produced in a iron nail = 0.620-0.610g
= 0.01g
Mass of Zn consumed = 5.720-5.710
=0.01g
Given length of the time run = 5 min
= 5*60= 300
from the faradays first law of electrolysis = I = mF/ Et
= 0.01* 96500/32.7*300
I= 0.098 amps
Mass of zinc produced in a iron nail is similar equal to the Mass of Zn consumed, hence no loss of mass.
Therefore , no loss of mass in the Mass of zinc produced in a iron nail is similar equal to the Mass of Zn consumed.
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5. A certain radio wave has a wavelength of 7 inches. a. Convert the wavelength of this radio wave into
meters. (1 meter = 39.37 inches) b. Find the frequency of this radio wave.
Answer: 0.18 (rounded) if you need exact, it's 0.1778
Explanation: I just divided 7 by 39.37 and then checked with g oogle to see if I was doing it right.
but also, that's physics, not chemistry
Place the following events related to hyperglycemia and vascular injury in the proper order. Reduced blood flowChronic hyperglycemiaEndothelial injuryCalcified plaqueAtherosclerotic plaque2, 3, 1, 4, 53, 2, 1, 4, 52, 3, 4, 5, 12, 3, 5, 4, 13, 2, 1, 5, 4
2, 3, 5, 4, 1 is the Correct order which is relater to hyperglycemia and vascular injury.
What is Hyperglycemia?
The word "hyperglycemia" comes from the Greek words "hyper" (high) and "glykys" (sweet/sugar") (blood). Blood sugar levels of more than 125 mg/dL when fasting and more than 180 mg/dL two hours after eating are considered to be hyperglycemia. A patient has pre-diabetes or impaired glucose tolerance if their fasting plasma glucose is between 100 and 125 mg/dL. The pathophysiology of hyperglycemia, its presentation, and consequences are covered in detail in this exercise, which also emphasises the need of the interprofessional team in diagnosing and treating patients with this illness.
Untreated hyperglycemia can result in a variety of significant, life-threatening consequences, including harm to the kidneys, heart, eyes, nerves, and peripheral vascular system. Thus, it is essential to properly and efficiently treat hyperglycemia to minimise illness complications and enhance patient outcomes.
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50.0 grams of a pure gaseous compound was
found to contain 30 grams of poxygen. What
is the percentage by weight of oxygen in this
compound?
Answer in units of %.
Answer:
To find the percentage by weight of oxygen in the gaseous compound, we need to first find the weight of the compound that is not oxygen. We can do this by subtracting the weight of the oxygen from the total weight of the compound: 50.0 grams - 30.0 grams = 20.0 grams.
Next, we need to divide the weight of the oxygen by the total weight of the compound and multiply the result by 100% to express the answer as a percentage: 30.0 grams / 50.0 grams * 100% = 60.0%.
Therefore, the percentage by weight of oxygen in the gaseous compound is 60.0%.
Explanation:
10. Which pair of elements would form a polar covalent bond together?
A. copper and carbon
B. sulfur and chlorine
C. oxygen and sodium
D. fluorine and fluorine
Answer: Which pair of elements would form a polar covalent bond together?
B. sulfur and chlorine
Explanation: In a covalent bond, two atoms share electrons to achieve a stable electron configuration. A polar covalent bond occurs when the electrons are not shared equally between the two atoms, resulting in a partial positive charge on one atom and a partial negative charge on the other.
This difference in electronegativity between sulfur and chlorine leads to an uneven distribution of electron density in the bond, creating a polar covalent bond.
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given the following diagram, indicate whether each labeled position is a reactant, a product, a transition state, or an intermediate.
The 2 transition state and 2 intermediate state are present and finally one product is there.
What is transition state ?
A transition state is an extremely transient configuration of atoms in a reaction-energy diagram that is at a local energy maximum (aka reaction coordinate). An unstable condition known as a transition possesses partial bonding, a very short lifetime (measured in femtoseconds), and cannot be isolated.
What is intermediate state ?
Any species that reacts and is not a transition state, no longer a starting material or reactant, nor a product.
According to the peaked Ness the ranges are named from A to G
A- Reactant
B- transition state
C- intermediate state
D- transition state
E -intermediate state
G- Product
There are 2 transition state and 2 intermediate state are present and finally one product is there.
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You are helping a friend change the battery in his car and some of the battery
fluid spills on your arm. You quickly begin to feel your skin burning where the fluid
leaked onto you. What caused the burning and what can you do to stop the
burning sensation?
Answer: 1. Immediately flush the area with lukewarm water for 30 minutes.
2. Remove clothing and jewelry from the affected area.
3.Wait to see if symptoms appear.
find the molarity and malality of 37.0wt% HCL given that the density of the reagent is 1.19g/ml
1) Let us assume 100.0 grams of solution. Therefore:
37 g is HCI
63 g is H2O
2) Calculate molality:
moles HCI = 37 g/ 36.5 g / mol = 1.014 mol
kg of water = 0.063 kg
molality = 1.014 mol / 0.063 kg = 16.09 molal
1) Determine moles of HCI in 100.0 g of 37% solution:
37 g of this solution is HCI
37 g / 36.5 g / mol = 1.014 mol
2) Determine volume of 100.0 g of solution:
density = mass / volume
1.19 g / mL = 100g / x
x = 84.03 mL
3) Determine molarity:
1.014 mol / 0.084 L = 12.07 M
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which of the following will result in the passivation of a metal (i.e., protection of the metal from corrosion)? select all that apply.
Use an oxidising chemical to give the metal an oxide covering.
Paint or another nonporous covering should be applied to the metal.
what is passivation?
In physical chemistry and engineering, passivation is the process of covering a material to make it "passive," or less susceptible to environmental corrosive effects. Passivation is the process of forming an outer layer of shield material that is either applied as a microcoating, produced chemically through reactivity with the base material, or allowed to develop naturally through airborne spontaneous oxidation. Passivation, as a technique, is the application of a thin layer of a corrosion-resistant substance, such as metal oxide.When making microelectronic devices, silicon is passively coated.
Many metals naturally develop a hard, comparatively inert surface layer when exposed to air. This layer, known as the "native oxide layer" or the "passivation layer," is typically an oxide or a nitride.
In the case of silver, the dark tarnish is a layer of silver sulphide that has formed by passivation as a result of reactivity with ambient hydrogen sulphide. (In contrast, metals like iron easily oxidise to generate a rough, porous covering of rust that attaches slackly and peels off easily, permitting further oxidation.)
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which of the following is not one of the three types of liquidity in terms of meeting cash needs in production cycles?
Meeting cycle due dates is not one of the three types of liquidity in terms of meeting cash needs in production cycles
Describe the production cycle.The process of turning raw resources into completed goods is referred to as the manufacturing cycle. The cycle consists of numerous independent parts, including product design, scheduling of production, manufacturing tasks, & a cost accounting feedback process. The production cycle of a business reveals how well it can turn assets into earnings, inventories into goods, & supply - chain into cash flow.
Describe the four fundamental steps in the production cycle.The product design, planning and scheduling, production operations, and cost accounting are the four fundamental steps in the production cycle.
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A 25-gram block of Aluminum has an initial temperature of 35 degrees Celcius. What will be the final temperature of the aluminum block with the addition of 503.38 Joules of heat?
The final temperature of aluminum is 57.37°C
Q=mcΔT
This means that the amount of energy produced is equal to the mass of the system multiplied by its change of temperature and multiplied by its specific heat
ΔT=(x−27.5) °C
503.38 = 25 × 0.9 × (x - 35)
(x - 35) = 503.3 / 25 × 0.9
x = 57.37°C
What is specific heat constant?
The specific heat capacity c [J/(kg K)] of tissue describes how much energy is required to change the temperature of 1 kg of tissue by 1 K (=1°C). For example, the lower specific heat capacity of fat compared to other soft tissue indicates, that fat requires less energy to obtain a certain temperature increase. If we multiply specific heat capacity by mass density (ρ·c [J/(m3 K)]), we obtain the energy required to raise the temperature of 1 m3 of tissue by 1 K (=1°C)—that is, a quantity equivalent to a volume-specific heat capacity
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feso4(aq) zn then, write balanced half-reactions describing feso4 mg the oxidation and reduction that happen in this reaction g
Given Reaction:
FeSO4(aq) + Zn (s)--> Fe (s ) + ZnSO4 (aq)
In above reaction, SO4-2(aq) is a spectator ion. Hence the net ionic equation for above reaction is given by-
Fe+2 (aq) + Zn (s) --> Fe (s) + Zn+2 (aq)
In the net ionic equation, the oxidation state of Zn changes from " 0" to " + 2 ". Therefore, the oxidation half reaction is
Zn (s) --> Zn+2 (aq) + 2e- (oxidation by releasing elections)
The oxidation state of Fe changes from ‘+2’ to ‘0’. Therefore, reduction half reaction:
Fe+2 (aq) + 2e- -->Fe (s) (Reduction by accepting elections)
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Calculate the enthalpy of solution for calcium chloride (110.98 g/mol) using the following data: When 37.73
g of CaCl₂ is dissolved in 240.00 g of water, the temperature of the solution increases by 24.25°C. Assume the
specific heat of the solution is 4.18 J/(g. °C).
CaCl(s) → Ca²+ (aq) + 2 Cl(aq)
AH=? kJ/mol
The enthalpy of the reaction is then obtained as 71.5 kJ/mol.
What is the enthalpy of the solution?We know that the enthalpy of the reaction has to do with the amount of heat that is absorbed or lost in the reaction. In this case, we can see that our task is to obtain the enthalpy of the dissolution reaction.
Number of moles of the calcium chloride = 37.73 g/110.98 g/mol
= 0.34 moles
Mass of the water = 240.00 g
Heat gained by the water = mcdT
m = mass of the water
c = heat capacity of the water
dT = Temperature change
Then;
H = 240.00 * 4.18 * 24.25
H = 24.3 kJ
Enthalpy of the reaction = -( 24.3 kJ)/0.34 moles
= 71.5 kJ/mol
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a proposed method of producing methanol how much heat must be added or removed from the whole system
A proposed method of producing methanol 5.58J heat must be added or removed from the whole system.
What is methanol ?
Having the chemical formula CH3OH, methanol is a liquid (often abbreviated MeOH). It has no color and is toxic, combustible, volatile, and unstable. The main building blocks for the synthesis of methanol are carbon monoxide and hydrogen, and it is produced by destructively distilling wood.
What is heat ?
Heat is the result of the movement of kinetic energy from one substance or item to another, or from an energy source to a substance or object. Radiation, conduction, and convection are three different ways that this energy might be transferred.
Therefore, a proposed method of producing methanol 5.58J heat must be added or removed from the whole system.
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Hexane burns according to the following equation:
2C6H14(g) + 19O2(g) ----------> 12CO2(g)+14H2O(g)
What volume of CO2 forms when 8.00 L of hexane burn, assuming the two volumes are measured under the same conditions? What volume of oxygen will be needed?
The volume of carbon dioxide gas forms is equal to 48 L and The volume of oxygen gas needed is 76 L.
What is the combustion reaction?A combustion reaction can be explained as a reaction that forms fire and takes place at a high temperature. Combustion Reaction is the combustion of hydrocarbon reacts with oxygen gas to give carbon dioxide and water molecules.
Given the chemical reaction of the combustion reaction of hexane:
[tex]2C_6H_{14}(g) + 19O_2(g) \longrightarrow 12CO_2(g)+14H_2O(g)[/tex]
Given the volume of hexane = 8.00 L
The number of moles of hexane = 8/22.4 = 0.357 mol
The moles of oxygen required to react with 0.357 mol of Hexane is equal to :
= (19/2) × 0.357
= 3.39 mol
The volume of oxygen gas = 3.39 × 22.4 = 76 L
The moles of CO₂ produced from 0.357 mol of Hexane is equal to :
= (12/2) × 0.357
= 2.14 mol
The volume of carbon dioxide gas forms = 2.14 × 22.4 = 48 L
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which of the following expands most when the temperature is increased? equal volumes ofquestion 14 options:iron.helium.wood.ice water.
Helium expands most when the temperature is increased.
For a given rise in temperature, gasses expand much more and faster than liquids. This is due to the fact that gasses have more interatomic or intermolecular space than liquids. Among the given, helium is a gas while the rest are liquids: Helium expands more than the rest.
What is temperature?
Temperature is a physical quantity that quantitatively expresses the sensations of hotness and coldness. The temperature is measured with a thermometer. Thermometers are calibrated in different temperature scales, which historically relied on different reference points and thermometric substances for definition.The Celsius scale (°C) is used for temperature measurements. It is an empirical scale that has evolved historically, leading to its zero point of 0 °C being defined as the freezing point of water and 100 °C as the boiling point of water.To know more about temperature, click the link given below:
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(a) the complex ion [ni (cn) 4 ]^ 2- is diamagnetic. explain using crystal field theory whether the structure of this complex ion is octahedral, square planar, or tetrahedral. .
−C≡N is the classic low spin ligand.
What is Ligand?
The Latin root of the term "ligand" means "to tie or bind." Anions, cations, and neutral substances can all function as ligands. Lewis bases are ligands that provide electron pairs, whereas Lewis acids are central metal atoms (electron pair acceptor). Covalent and ionic bonds are two different types of bonding that can exist between a metal and its ligand.
On rare occasions, ligands can be electron-pair acceptors and cations (NO+, N2H5+). Examples of neutral ligands include NH3, H2O, NO, and CO, whereas anionic ligands include F-, Cl-, Br-, I-, S2-, CN-, NCS-, and OH-.
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PLEASE HELP 100 POINTS WILL GIVE BRAINLIEST
Answer:
I believe it is either A or B but I'm leaning more towards B
Explanation:
Sorry I'm not for sure
Answer: C
Explanation:
What is the volume of oxygen gas at stp from thr decompositon of 10.8g of mercuric oxie (216.59g/mol)
The volume of oxygen gas from mercuric oxide at STP from ideal gas equation is 123.54 liters.
What is ideal gas equation?The ideal gas equation is a equation which is applicable in a hypothetical state of an ideal gas.It is a combination of Boyle's law, Charle's law,Avogadro's law and Gay-Lussac's law . It is given as, PV=nRT where R= gas constant whose value is 8.314.The law has several limitations.
Substituting the given values in ideal gas equation, V=mass×RT/molar mass×P=10.38×8.314×298/216.59×1=123.54 L.
Thus, the volume of oxygen gas at STP is 123.54 L.
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If atom a loses electrons to atom b, what will be the oxidation number of atom A?
And…. If atom A loses electrons to atom B, what will be the total charge of the compound formed? Please explain?
Answer:
Total charge would be 0
Explanation:
Atom A will lose 2 outer electrons to atom B. So atom A will be come [A]2+ while atom B will become [B]2-. The total charge of the compound AB will be 0.
If atom A loses electrons to atom B, what will be the total charge of the compound formed is zero.
What is charge of an atom?Charge often refers to electric charge in chemistry and physics, which is a conserved feature of some subatomic particles that governs their electromagnetic interaction. An electromagnetic field exerts a force on matter as a result of the physical attribute of charge. Positive or negative charges can exist in an electric field.
The matter is regarded as neutral or uncharged if there is no negative electric charge present. Similar charges repel one another, such as two positive or negative charges. Positive and negative charges that are incompatible are drawn to one another. To atom B, atom A will give two outer electrons. As a result, atom A will change into A²⁺ and atom B into B²⁻. The chemical AB will have a total charge of zero.
Therefore, if atom A loses electrons to atom B, what will be the total charge of the compound formed is zero.
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Estimate the overall liquid side resistance for oxygen transfer from water to air. The local mass transfer coefficient for Ozin air is 23 cm/s. The local mass transfer coefficient for O2 in water is 0.0021 cm/s. The liquid-gas partition coefficient for O2 is 0.03
The overall liquid side resistance for oxygen transfer from water to air is 477.63 sec/cm.
The relationship between the mass transfer coefficient and local mass transfer coefficient can be calculated using the formula 1/Kc = 1/kc+1/mk
1/Kc=1/0.0021+1/23*0.03 sec/cm
1/Kc= 477.63sec/cm
What is resistance?
The obstruction to current flow in an electrical circuit is measured by resistance. The Greek letter omega () represents the unit of measurement for resistance, known as ohms. Georg Simon Ohm (1784–1854), a German physicist who investigated the connection between voltage, current, and resistance, is the name given to the unit of resistance.
What is formula of resistance?
The following is the formula for calculating resistance using Ohm's Law: R = V I, where R is the resistor's resistance measured in ohms () and V is the voltage drop measured in volts within the resistor.
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The overall liquid side resistance is 476 cm/s.
What is resistance?
Resistance is a measure of how difficult it is for electricity to flow through a material or circuit. It is measured in ohms and is determined by the material used and its dimensions. Resistance affects the current in a circuit, as well as the voltage, and can be used to control the flow of electricity. Resistance can be increased or decreased in a circuit by changing the material used, or by altering the shape or size of the material. Resistance is an important part of electrical engineering, and is essential for the functioning of many electronic devices.
The overall liquid side resistance for oxygen transfer from water to air can be calculated using the following equation:
R_l = 1/(K_L * k_L)
where K_L is the liquid-gas partition coefficient and k_L is the local mass transfer coefficient in the liquid phase.
In this case, K_L = 0.03 and k_L = 0.0021 cm/s. Thus, the overall liquid side resistance is
R_l = 1/(0.03 * 0.0021 cm/s) = 476 cm/s
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With enough ____________,
_______________, and
__________, the original
sedimentary or igneous rock is
changed to ______________ rock.
Answer: with enough heat, pressure, and time, the original sedimentary or igneous rock is changed to metamorphic rock.
Explanation:
4) How many moles of a gas occupy 347.8 mL, at 4.369 x 10-1 atm and 25.00 C?
The number of moles occupied by a gas at 347.8 mL is 6.21 × 10-³moles.
How to calculate moles?The number of moles occupied by a gas can be calculated using the ideal gas equation formula as follows:
PV = nRT
Where;
P = pressureV = volume n = number of molesR = gas law constantT = temperatureAccording to this question, the following parameters are given:
P = 0.4369atmV = 0.3478LT = 25°C = 298K0.4369 × 0.3478 = n × 0.0821 × 298
0.1519 = 24.47n
n = 6.21 × 10-³moles
Therefore, 6.21 × 10-³moles is the number of moles of the gas.
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Who used cathode ray tubes and what discovery did this lead to?.
Predict whether S for each reaction would be greater than zero, less than zero, or too close to zero to decide.
H2(g) + F2(g)2HF(g)
2NOBr(g)2NO(g) + Br2(g)
2HBr(g) + Cl2(g)2HCl(g) + Br2(g)
4HCl(g) + O2(g)2H2O(g) + 2Cl2(g)
CaCO3(s)CaO(s) + CO2(g)
Entropy (S) for H₂(g) + F₂(g) ⇒2HF(g) would be less than zero. for 2NOBr(g )⇒2NO(g) + Br₂(g)would be greater than zero. for 2HBr(g) + Cl₂(g) ⇒ 2HCl(g) + Br₂(g) would be too close to zero to decide. for 4HCl(g) + O₂(g) ⇒ 2H₂O(g) + 2Cl₂(g) too close to zero to decide. for CaCO₂(s) ⇒ CaO(s) + CO₂(g)would be greater than zero.
Entropy is typically higher in reactions that entail the transformation of a solid into a liquid or a liquid into a gas.
Entropy is typically lower in reactions involving the transformation of gases into liquids and liquids into solids.
H₂(g) + F₂(g) ⇒2HF(g)Due to the fact that the total number of products generated decreased from 2 gases to 1, there was less degree of disorderliness, making this value less than zero.
2NOBr(g⇒ 2NO(g) + Br₂(g)Due to the formation of two products from one, this is more than zero. The number of gas products increased from one to two, further escalating the system's dysfunction.
2HBr(g) + Cl₂(g) ⇒2HCl(g) + Br₂(g)Due to the reactant and product both having an identical number of products in the same state of matter, this is too near to zero to decide.
4HCl(g) + O₂(g) ⇒2H2O(g) + 2Cl₂(g)Due to the reactant and product both having an identical number of products in the same state of matter, this is too near to zero to decide.
CaCO₃(s) → CaO(s) + CO₂(g)Due to the formation of one gas products from one solid, this is more than zero. The number of gas products increased from zero to one, further escalating the system's dysfunction.
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Calculate the mass of hydrogen in your 50.0 mL of water.
100 POINTS HELP PLEASE You decide to study which dishwashing detergent removes dried on ketchup the fastest. Which of these would be considered a constant in the experiment?
A. Using 40 °C water
B. Altering the wash cycle length
C. Using different amounts of ketchup
D. Using different brands of dish detergent
Should be A: 40 C water
Explanation:
7. What are the coefficients that will balance the skeleton equation below?
N₂ + H₂ → NH3
a.1,1,2
b.3,1,3,1
c.1,1,1,3
d.1,3,3,1
When the equation Fe + Cl₂ → FeCl, is balanced, what is the coefficient
Answer:
N₂ + 3H₂ → 2NH3
4Fe + 2Cl₂ → 4FeCl
Explanation:
This equations are now balanced
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When X rays of wavelength 0.090 nm are diffracted by a metallic crystal, the angle of first-order diffraction (n = 1) is measured to be 15.2. What is the distance (in pm) between the layers of atom responsible for the diffraction?
When X rays of wavelength 0.090 nm are diffracted by a metallic crystal, the angle of first-order diffraction (n = 1) is measured to be 15.2. The distance between layers in an NaCl crystal is 282pm.
What is wavelength?
A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. This length is typically defined in wireless systems in metres (m), centimetres (cm), or millimetres (mm) (mm).
The wavelength, which will also apply to troughs, is the separation between two wave crests. The frequency is measured in cycles per second (Hz), which is the quantity of vibrations that cross a specific area in a second (Hertz).
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When X rays of wavelength 0.090 nm are diffracted by a metallic crystal, the angle of first-order diffraction (n = 1) is measured to be 15.2. The distance between layers in an NaCl crystal is 282pm.
What is wavelength?Wavelength is a measure of the distance between two consecutive peaks or troughs in a wave. It is usually represented by the Greek letter lambda (λ) and is measured in the SI unit of meters. Wavelength is an important parameter in many fields, including physics, acoustics, optics, and astronomy. In physics, the wavelength of a wave is related to its frequency, period, and energy. In optics, it is used to describe the properties of light, and in astronomy it is used to describe the properties of radio waves and other forms of electromagnetic radiation. Wavelength is also used to calculate the angular size of an object and its distance from Earth. Wavelength is an important concept in understanding the behavior of light and sound, and their interactions with matter.
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