Majority carries electron concentration n₀=225 cm⁻³
Briefing:At= 300k ni= 1.5×10¹⁶ cm⁻³
Given na= 10¹⁸ cm⁻³
as Na>>ni the hole concentration is,
P₀= Na= 10¹⁸ cm⁻³
Therefore majority carries of the hole concentration is
P°= 10¹⁸ cm⁻³
At equilibrium,
P₀n₀= ni²
n₀= ni²/P₀= (1.5×10¹⁰)²/10¹⁸= 225×cm⁻³
n₀= 225 cm⁻³
Majority carries electron concentration n₀=225 cm⁻³.
Definition of concentration:All that noise is interfering with my focus since concentration is defined as the act or process of concentrating as well as the state of being concentrate a focus within a major or a major itself The student decided to concentrate in law.
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The exchange of energy between the surface of the earth, the atmosphere, and space causes ________________ .
A small change in the atmospheric condition can create a different weather pattern. Each weather pattern has a domino effect, creating a ripple effect around the world.
Weather is the state of the atmosphere with respect to heat or cold, wet or dry, calm or stormy, clear or cloudy.
The exchange of energy between the surface of the earth, the atmosphere, and space causes weather.
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To include a css file in an html document, you use the _______________________ element.
To include a css file in an html document, you use the link element.
While CSS determines the look and layout of a website, HTML defines its content and organisational structure. Together, the two languages make it possible to build a well-organized, useful website.
What kind of selection would you employ to make a specific HTML element reference?The id selector chooses a particular HTML element by using the id property. The id selector is used to choose a single distinct element since each element's id is distinct inside a page. A hash (#) character should be written after the element's id in order to pick it.
How may CSS be added to HTML?There are three techniques to include CSS in HTML documents: Using the style property inside HTML elements is known as "inline." Utilizing a "style" element in the "head" section is one internal method. External – by linking to an external CSS file using the link> element.
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How is radioactive decay used to date sedimentary rocks?
a) the amounts of potassium and argon in sedimentary rocks are measured.
b) the amounts of carbon-14 and nitrogen in sedimentary rocks are measured.
The correct option is (d) It is measured how many unstable elements are present in the volcanic layers above and below the sedimentary layers.
How is radioactive decay used to date sedimentary?
Researchers use some kind of clock to ascertain the date when a rock or fossil was generated in order to calculate its age. In order to reliably date historic events, geologists frequently utilize radiometric dating techniques, which are based on the natural radioactive decay of specific elements like potassium and carbon.
Natural radioactive decay results from the atomic nucleus becoming unstable and releasing fragments. Radioactive particles are released as a result (there are many types). When the number of protons and neutrons in the nucleus is balanced as a result of this decay process, the atom becomes stable.
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Which layer of the osi model ensures the data being sent from the sender is formatted correctly so it can be interpreted correctly by the recipient system?
6th layer of OSI model ensures complete and rebel delivery of data packets.
(presentation layer is the 6th layer.)
OSI - Open system Interconnection is a conceptual model that provides a common basis for the condition.
It is a reference model for how application communicate over a network.
This model describes 7 layer that computer system used to communicate over a network.
It was the model for network communication and adopted by all major computer and companies.
The complications between US computing system are split in several layers.
physical. Datalink. Network. Transport. Session Presentation Application.The purpose of OSI reference model is to guide technology developer.
4th layer (presentation layer) of OSI model ensures complete and rebel delivery of data packets.
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A 500 kg pig is moving south and has a momentum of 17.5 kg m/s. At what velocity is it moving?
Answer:
99km
Explanation:
The body process in which an adequate supply of oxygen converts glucose into energy is called:________
Aerobic metabolism can occur both aerobically (using oxygen), or anaerobically (without oxygen). During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell.
What is Cellular respiration ?Through the process of cellular respiration, organisms mix oxygen with food molecules, directing the chemical energy contained in these substances toward life-sustaining processes while excreting carbon dioxide and water as waste.
Glycolysis, also known as the citric acid cycle, is the first stage of cellular respiration. The Krebs cycle, also known as the electron transport chain, is the second stage Anaerobic and aerobic respiration are the two basic forms of cellular respiration. It need oxygen (O2) to make ATP during an exclusive type of cellular respiration known as aerobic respiration.Learn more about Cellular respiration here:
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A car horn creates a 595 Hz tone at rest. Two cars pass on the street, each going 20 m/s; the first car honks. What frequency does the other car hear after they pass each other? (speed of sound = 343 m/s) (unit = Hz). PLEASE HELP
The frequency does the other car hear after they pass each other is 631.8 Hz.
Frequency heard by the second car
The frequency heard by the second car is calculated as follows;
f = f'(v/v - vs)
where;
f' is the original frequencyf is the later frequency heardv is speed of soundvs is source speedf = 595(343/343 - 20)
f = 631.8 Hz
Thus, the frequency does the other car hear after they pass each other is 631.8 Hz.
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An atom of carbon has six protons. consider that the number of protons is changed to seven. is it still an atom of carbon? briefly explain your answer either way.
If the number of protons of a carbon atom is changed from 6 to 7, such an atom will no longer be a carbon atom.
The significance of the proton numberThe number of protons in an atom determines the atomic number of the atom. The atomic number of an atom determines the kind of atom.
For example, lithium has 3 protons and thus, an atomic number of 3. Carbon has the atomic number of 6 because it has 6 protons.
No atom of the same element can have a different number of protons. However, other atomic such as the number of electrons and neutrons components can vary.
Atoms of the same element with a different number of neutrons are called isotopes. Ions of the same atom will have a variable number of electrons.
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What are the four major elements in the body
The correct answer is Oxygen (65%) Carbon (18.5%) Hydrogen (9.5%) Nitrogen (3.2%).
Oxygen (O) - 65% - Oxygen and hydrogen combine to make water, which serves as the body's main solvent and a mechanism for controlling temperature and osmotic pressure. Numerous important chemical molecules include oxygen.
With four bonding sites for other atoms, carbon (C), which accounts up 18.5% of the composition, is the important atom in organic chemistry. Proteins, nucleic acids, carbohydrates, and lipids are all composed of carbon chains. Bonds made of carbon may be ruptured to release energy.
Hydrogen (H) - 9.5% - All organic compounds and water both include hydrogen.
Nitrogen (N) - 3.2% The nucleic acids that make up the genetic code and proteins both include nitrogen.
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Determine whether the underlined numerical value is a parameter or a statistic. explain your reasoning. a certain zoo
Parameter, because the data set of all 843 animals in a zoo is a population.
The population of all animals in the Zoo is 843
Proportion = 8%, which is the ratio regarding the population. So 8% is populaton proporiton, i..e Parameter .
What is a zoo?A zoo, short for the zoological garden, is a place where animals are kept in enclosures, cared for, presented to the public, and occasionally bred for conservation efforts. The phrase zoological garden refers to zoology, the study of animals. It is also used to refer to an animal park or menagerie. In the United States alone, over 181 million people visit zoos every year. The goal of the modern zoo, which first appeared in the 19th century in the United Kingdom was to entertain and inspire the public by offering scientific inquiry and later educational exhibits. The London Zoological Gardens, which was opened to the public in 1847 after being opened for scientific study in 1828, is where the abbreviation "zoo" first appeared.
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If the price elasticity of demand for digital cameras is 0.88, then the demand is _____ and total revenue will ______ if the price of cameras increases.
Digital camera demand is inelastic if the price elasticity of demand is 0.88, meaning that price rises for cameras will result in higher overall sales.
By price elasticity, what do you mean?Price elasticity of demand measures how much a product's consumption changes in response to price changes. If a good's price elasticity is infinite, it is perfectly elastic (if demand changes substantially even with minimal price change). The good is elastic if price elasticity is more than 1, and inelastic if it is less than 1. A good is completely inelastic if its price elasticity is zero, meaning that no amount of price variation will alter demand. The quantity effect will be overpowered by the price effect. The relationship between the percentage change in a product's quantity demanded and the percentage change in price is known as price elasticity of demand. It helps economists comprehend how supply and demand shift in response to changes in a product's price.
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Is the smallest, electrically neutral assemblage of energy and matter that we know exists in the universe. it consists of a nucleus surrounded by a cloud of electrons?
The smallest, electrically neutral assemblage of energy and matter that we know exists in the universe. it consists of a nucleus surrounded by a cloud of electrons is: an atom
The smallest unit of an element that still retains the distinctive behavior of that element is an: atom
A single atom of an element keep its distinctive behavior, that's because the atom is the smallest unit of the composition of a chemical element
What is an atom?The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.
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A wheel rotates with 1800rpm. A)Find the revolutions per minute. B)what is the angular speed of the wheel in rad/s. Use =3
Answer:
Option C
Explanation:
Initial frequency of rotation ν
i
=1800 rpm =1800/60=30 rps
Thus initial angular frequency w
i
=2πν
i
=60π rad/s
Final frequency of rotation ν
f
=3000 rpm =3000/60=50 rps
Thus final angular frequency w
f
=2πν
f
=100π rad/s
∴ Angular acceleration α=
t
w
f
−w
i
OR α=
20
100π−60π
=2π rad/s
2
If a 50.7 mg sample of protein a in 1.5 ml of water has an osmotic pressure of 0.273 atm, what is the molar mass of protein a?
The calculated value is 13963.42 g/mol
Protein Molecular Weight determines the molecular weight from a protein sequence. Using the provided list, you can append copies of frequently used epitopes and fusion proteins. The Rubisco monomer is a typical soluble protein, and a basic rule of thumb for thinking about soluble proteins is that they are 3-6 nm in diameter, which demonstrates not only Rubisco but many other significant proteins that are essential for cell function.
Mass of protein (w2) =0.1g
R=0.082 L atm/ (k mol)
T=298K
π=13.33 mm of Hg = 760/13.33
=0.0175 atm
volume of solution =0.01L
Using,
M2= πVW2RT
We get M2
= 0.0175×0.01/0.1×0.082×298
=13963.42 g/mol
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In the cartesian plane, a house is at the point (107, 64). we are currently at the origin, and we want to reach this house. we have two modes of transportation:_________
As a result, neither a skateboard nor a magic carpet can take us there from the starting place.
Briefing:We can't go there from here (107,64)
Utilizing a skateboard or a magic carpet.
Utilizing a magic carpet with a (3, 1) mile per hour speed
To get to the point's y coordinate, we need 64 hours (107,64)
However, we eventually make it 192 miles in that way.
So, rather than, we arrive at point (192,64) (107,64)
Similarly, using a skateboard at a speed of (5,1) miles per hour
We finally arrive at (320,64) after 64 hours.
Therefore, utilizing a skateboard or a magic carpet won't get us there from where we started.
What skateboard works best on pavement?Longboards are often more suited for bumpy roads compared to street skateboards. The first is that longboards frequently have larger, softer wheels installed these normally have a diameter of 60 to 75mm and a durometer of 77 to 80A.
What are 4 types of skateboards?Skateboard longboard.Rolling Skateboard.skateboard, small cruiser.Skateboard Carve.To know more about Skateboard visit:
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an open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system?
Answer:
Fail-close
Explanation:
A failed open switch is a switching device (be it mechanical, relay, semiconductor) that has lost it's switching capabilities (it's defective) and the switched contacts are now constantly open (disconnected) regardless of the control signal to the switch.
Similarly a failed closed switch is the same just with the contacts connected through.
Your answer should include all the following pieces of information. Check off each of the items you included in your answer. It contains 11 protons in the nucleus. It contains 12 neutrons in the nucleus. It contains 10 electrons surrounding the nucleus. The number of electrons are calculated from net charge and charge of proton (+1) and electron (-1). 12 neutrons are calculated from atomic number: 11 and mass number: 23. DONE
Its nucleus has eleven protons.
The nucleus of it has 12 neutrons.
The nucleus is surrounded by 10 electrons.
Net charge, proton (+1), and electron charges are used to calculate the number of electrons (-1).
Calculated from the atomic number of 11 and the mass number of 23, are 12 neutrons.
What are mass number and atomic number?
The total number of protons or electrons in an element is known as its atomic number. Therefore, using the atomic number to distinguish one element from another is helpful. The total number of protons and neutrons in an element is known as the mass number.
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Question:
An atom of sodium-23 (Na-23) has a net charge of +1. Identify the number of protons, neutrons, and electrons in the atom. Then, explain how you determined the number of each type of particle. Use the periodic table to help you.
A current carrying wire is placed vertically. the magnetic field around the wire is rotating clockwise around the wire. what direction is the current moving?
A current carrying wire is placed vertically. The magnetic field around the wire is rotating clockwise around the wire. The current is moving from top to bottom
Holding a current carrying wire in your right hand with the thumb pointing in the direction of current flow, the fingers wrapping the wire will portray the magnetic lines of force direction, following the right-hand thumb rule.
As a result, a current carrying conductor is vertically held. If you follow the rule, the current should be passed through it to generate a clockwise magnetic field around the conductor from top to bottom.
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A boy sledding down a hill accelerates at 1.25 m/s2. if he started from rest, in what distance would he reach a speed of 5.30 m/s?
By uniform motion, the distance traveled is 11.24 meters.
We need to know about the uniform motion to solve this problem. The uniform motion is the motion of an object which has acceleration applied. It can be determined as
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time interval and s is displacement.
From the question above, we know that:
a = 1.25 m/s²
vo = 0 m/s
vt = 5.3 m/s
By using the second equation, we can calculate the distance
vt² = vo² + 2a . s
5.3² = 0² + 2 . 1.25 . s
2.5s = 28.09
s = 11.24 m
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If earth receives half as much light per unit area per unit time from star a compared to star b, what is the apparent visual magnitude difference between the stars?
The apparent visual magnitude difference between the Star A is higher.
What does apparent visual magnitude measure?A star's apparent magnitude, or m, indicates how brilliant the star appears when it is far away from Earth. The scale is logarithmic and "backwards." Stars with larger magnitudes are also fainter stars. Be aware that brightness is another word for the flux of light that is coming at us and is measured in Watts per square meter.
The brightness of a star or other celestial object as seen from Earth is expressed in terms of apparent magnitude. The apparent magnitude of an object is determined by its inherent luminosity, its distance from Earth, and any light extinction brought on by interstellar dust in the path of the observer's line of sight.
The brightness of a star or other celestial object perceived from Earth is measured in apparent magnitude (m). The apparent magnitude of an object is determined by its inherent luminosity, its distance from Earth, and any light extinction brought on by interstellar dust in the path of the observer's line of sight.
The apparent visual magnitude difference between the Star A is higher.
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Magnetic field strength decreases as you get farther from the poles of the magnet. does the flux through the face of the coil change as you move the magnet? explain your answer.
Magnetic field strength decreases as you get farther from the poles of the magnet.
ExplanationThere are three ways to change the magnetic flux across a loop: Change the strength of the magnetic field across the surface (raise, reduce).
It doesn’t matter whether you move the coil while keeping the magnet fixed or the other way around if you want to change the surface area of the loop (raise by expanding the loop, decrease by reducing the loop).
The way they move in respect to one another determines how the magnetic flux across the coil changes. The direction in which the galvanometer needle deflects depends on which side of the coil confronts the magnet when you move it. The coil ends are labelled to show which goes to the red wire and which goes to the black wire.
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Thwo charges, -10 nc and -10 nc are 1.0 cm apart on the x-axis. what is the total electric
The electrostatic force is 9 x 10¯³ N.
We need to know about electrostatic force to solve this problem. The electrostatic force is applied on a charge which has near position to another charge. It can be determined by
F = k Q1 . Q2 / r²
where F is electrostatic force, k is Coulomb constant (9 x 10⁹ Nm²/C²), Q1 and Q2 are the charges and r is the radius or distance between the charges.
From the question above, we know that
Q1 = -10 nC = -10 x 10¯⁹ C
Q2 = -10 nC = -10 x 10¯⁹ C
r = 1 cm = 0.01 m
By substituting the following parameters, we can calculate the electrostatic force
F = k Q1 . Q2 / r²
F = (9 x 10⁹ . 10 x 10¯⁹ . 10 x 10¯⁹ / (0.01)²
F = 9 x 10¯³ N
Hence, the electrostatic force is 9 x 10¯³ N.
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The vernal equinox is now just entering the constellation aquarius. In what constellation will it lie in the year a. D. 10000?.
The vernal equinox during the year 10000 AD will be in the Scorpio constellation
A complete cycle of precession is finished once every 25800 years. Because there are 12 constellations, it takes 2150 years to travel from one to the next. The vernal equinox travels from Aquarius to Sagittarius, Scorpio, Capricorn, Libra, etc.
The year is 2022 AD, and the vernal equinox has just entered the constellation Aquarius. It would have managed to enter the Capricorn constellation in 4172 AD, the Sagittarius constellation in 6322 AD, the Scorpio constellation in 8472 AD, and the Libra constellation in 10622 AD. This means that it remains in the constellation Scorpio in 10000 AD and has yet to enter the constellation Libra.
As a result, the vernal equinox during the year 10000 AD will be in the Scorpio constellation.
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How many coulombs of positive charge are there in 1. 21 kg of plutonium, given that its atomic mass is 244 and each plutonium atom has 94 protons?
By Avogadro's number, the positive charge of plutonium is 4.5 x 10⁸ C.
We need to know about Avogadro's number to solve this problem. Avogadro's number is the number that explains how many atoms are in one mol. The Avogadro's number is
Na = 6,02 × 10²³ atoms / mol
From the question above, we know that
m = 1.21 kg = 1210 g
Ar = 244
λ = 94 protons/atom
By using Avogadro's number, we can calculate how many plutonium atoms
N = Na . n
N = 6,02 × 10²³ x gr/Mr
N = 6,02 × 10²³ x 1210/244
N = 3.01 x 10²⁵ atoms
Find the protons
protons = λ . N
protons = 94 . 3.01 x 10²⁵
protons = 2.83 x 10²⁷
Each proton has a charge 1.6 x 10¯¹⁹ C. Hence, the positive charge of plutonium is
Q = 2.83 x 10²⁷ . 1.6 x 10¯¹⁹ C
Q = 4.5 x 10⁸ C
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What does your answer indicate about the total resistance of a parallel circuit with three resistors, compared to the resistance of the circuit with a single resistor?
The total resistance of a Parallel circuit with three resistors will be one third times lesser than the resistance of the circuit with single resistor.
What are resistors?A resistor is a passive two-terminal electrical component used in circuits to implement electrical resistance. Resistors have a variety of purposes in electronic circuits, including lowering current flow, adjusting signal levels, dividing voltages, biassing active components, and terminating transmission lines.
High-power resistors that can generate many watts of heat instead of electrical energy can be utilized as test loads for generators, power distribution systems, and motor controls. With temperature, time, or operating voltage changes, fixed resistors’ resistances only slightly fluctuate.
Variable resistors can be utilized as force sensors, heat sensors, light sensors, volume controls, lamp dimmers, humidity sensors, and chemical activity sensors.
What are the types of combination of resistors?When two or more resistances are connected between two points and each has a different current direction, the resistances are said to be connected in parallel.
In such circuits, the branches intersect at a common location, causing the current to branch out and then recombine.
When two or more resistances are connected end to end and the same current passes sequentially through all of them, this is referred to as a series connection. The total resistance in this situation is equal to the entire number of Individual resistances included in the series combination.
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What is the deceleration of the rocket sled if it comes to rest in 1.1 s from a speed of 1000 km/h? (such deceleration caused one test subject to black out and have temporary blindness.)
The deceleration of the rocket sled if it comes to rest in 1.1 s from a speed of 1000 km/h is [tex]252.52\ m/s^2[/tex].
The acceleration in opposite direction is known as the deceleration. Basically the deceleration is negative value of the acceleration since the negative sign depicts its opposite in direction.
The given data:
time, t = 1.1 s
initial speed, u = 1000 km/h = [tex]\frac{2500}{9}\ m/s[/tex]
final speed, v = 0 m/s
So we will be using the equation of motion, that is,
v = u + at
[tex]\therefore 0=\frac{2500}{9} + a(1.1)[/tex]
[tex]\Rightarrow a=-\frac{2500}{9(1.1)}[/tex]
[tex]\therefore a = - 252.52 \ m/s^2[/tex]
Hence , the deceleration of the rocket is [tex]252.52\ m/s^2[/tex].
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The drift velocity should be in the same direction as the applied force.
a. true
b. false
It is a false statement i.e. drift velocity is not same in the direction as the applied force.
Drift velocity of a current-carrying conductor can be explained as, the charges i.e. electrons do not flow in the same direction of current. In other word, in most cases the movement of the electrons is almost random, with a small net velocity. So that , the drift velocity, in the direction opposite to the electric field.
Drift velocity [tex]v_{d}[/tex] is inversely proportional to the number of electron per unit volume of the conductor e. Therefore, the formulation can be given as ,
[tex]v_{d}[/tex] = σ E/ne
The above equation shows the drift velocity in a current carrying conductor
where, [tex]v_{d}[/tex] is drift velocity , σ is the conductivity, E is electric force and n is number of electrons per unit volume of the conductor e.
Hence here we can say that, the drift velocity is not in the same direction as the applied force.
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A kangaroo can jump over an object 2.40 m high. calculate how long in seconds it is in the air. (3 sig figs
A kangaroo will stay 0.699s in the air when he jumps.
What motion does the projectile make?A projectile is an object that is launched vertically into the air and moves while being pulled by gravity. A projectile is an object that is launched into the air horizontally and moves regardless of gravity.
How do you determine the rate of descent?G = -9.81 m/s2 is the acceleration of gravity close to the earth. Simply multiply the acceleration of gravity by the period since the object was released to determine the object's speed (or velocity). In other words, velocity is equal to -9.81 m/s2 * time, or V = gt.
According to the given information:From the conversion of energy =[tex]h=\frac{g t^2}{2}[/tex]
t = √(2h/g)
= √((2 x 2.40) / 9.8)
=0.699 s
A kangaroo will stay 0.699s in the air when he jumps.
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At what point in an acid-base titration are equivalent quantities of hydronium ions and hydroxide ions present?
Answer: Equivalence Point
Explanation:
An Acid-Base Titration is a titration carried out to determine the strength or concentration of an acid or a base by neutralizing it with a standard solution of an acid/base of known concentration.
At equivalence point in an acid-base titration the moles of base become equal to the moles of acid. This implies that , at this point of the titration the amount of titrant (standard solution of acid/base) added is just enough to neutralize the analyte (acid/base whose strength has to be determined).
The progress of these reactions are kept track of by pH indicators like phenolphthalein or methyl red.
At equivalence point, only the salt and water exist.
The following titration curve in the image shows the equivalence point of an acid-base titration.
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How many years would it take to reach the planet saturn travelling at 21 thousand miles per hour? enter your answer with 2 decimal places.
It would take about 4.8 years to travel from earth to Saturn.
How long would it take?We know that speed is expressed as the ratio of distance to time. In this case, we are trying to know ow many years would it take to reach the planet Saturn travelling at 21 thousand miles per hour.
Given that;
Speed = 21 thousand miles per hour
time taken = ???
Distance = 887 million miles
Speed = distance/time
speed * time = distance
time = distance/speed
time = 8.87 * 10^8 miles/2.1 * 10^4 miles per hour
time = 4.22 * 10^4 hours
If 8.766 * 10^3 hours make 1 year
4.22 * 10^4 hours make 4.22 * 10^4 hours * 1 year/8.766 * 10^3
= 4.8 years
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