A 2.40-mol sample of oxygen gas is confined to a 4.91-l vessel at a pressure of 8.05 atm, average translational kinetic energy of the oxygen molecules under these conditions is 4.15*10power-21
What is kinetic energy?The kinetic energy is energy that an object has because of its motion. If we want to accelerate an object, then we have to must apply a force, applying a force requires us to do work. After the work has been done, the energy has been transferred to the object, and the object will be moving with a new constant speed. The energy transferred is known as the kinetic energy, and it depends on the mass and speed achieved.
Kinetic energy can be transferred between the objects and transformed into other kinds of energy. For example, a flying squirrel might collide with the stationary chipmunk. Following the collision, some of initial kinetic energy of the squirrel might have been transferred into the chipmunk or transformed to some other form of energy.
How to calculate kinetic energy?To calculate the kinetic energy, we follow the reasoning outlined above and begin by finding the work done, W, by a force, F, in a simple example, consider a box of mass m being pushed through distance d along a surface by a force parallel to that surface.
K.E.=3/2 KbT
=3/2[(8.05*1.013*10power5*4.91*10power-3)/2.40*6.022*10power23)]
=4.15*10power-21
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Question 2
Which of the following is an SI unit for expressing the mass of a block of Au?
A. M
B. L
C. Pound
D. G
The SI unit for expressing the mass of a block of Au is gram with SI unit symbol g.
SI unit is a measurement unit which is universally accepted system. It is used for technical and scientific work.
The gram is the unit of mass in the International systems of units, SI. Gram is equal to 1/1000th of a kilogram.
Mass is used to measure an objects's weight. Most common units to express mass in metric system is gram and kilogram. The standard unit of mass in SI system is kilogram (Kg). The reason to use kilogram is because gram is a small amount.
Although, in case of Au, the SI unit to express mass of Au is g.
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Which term best describes salt water made by combining table salt with pure water
Answer: "homogenous mixture." out of these 2
brine, salt water, particularly a highly concentrated water solution of common salt (sodium chloride).
HOPE THIS HELPS.✨
an aqueous solution of 0.783 m silver nitrate, , has a density of 1.11 g/ml. the percent by mass of in the solution is %
An aqueous solution of 0.783 m silver nitrate, has density of 1.11 g/ml. the mass percentage in the solution is 40.1%.
What is aqueous solution?Water serves as solvent in an aqueous solution. It is mostly shown in the chemical equations by appending (aq) to relevant chemical formula.
Reactions in aqueous solutions are usually the metathesis reactions. Metathesis reactions are the another term for double-displacement; that is, when a cation displaces to form an ionic bond with the other anion. The cation bonded with latter anion will dissociate and bond with the other anion.
A common metathesis reaction in the aqueous solutions is a precipitation reaction. This reaction occurs when the two aqueous strong electrolyte solutions mix and produce an insoluble solid, also known as a precipitate. The ability of a substance to dissolve in the water is determined by whether the substance can match or exceed the strong attractive forces that water molecules generate between themselves. If the substance lacks the ability to dissolve in the water, the molecules form a precipitate.
let's take 1.00-L sample of this solution. Use given density to determine its mass
1.00L*1000mL/1L*1.47 g/1mL=1470 g
Now, this 1.00-L solution will contain
c=n V⇒ n=c*V
n=3.47moles/L*1.00L=3.47 moles
Use the molar mass of silver nitrate to help us how to determine grams of silver nitrate would contain this many moles 3.47
moles AgNO3
169.87 g*1mole AgNO3=589.4 g AgNO3
Now, solution's percent concentration by mass is defined as the mass of the solute, in your case silver nitrate, divided by the mass of the solution, and multiplied by 100
%w/w=mass of solute/mass of solution×100
Plug in your values to get
%w/w=589.4g1470g×100=40.1%
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a snow falls ln a cold after non is an example of
A snow is basically made up of individual ice crystals which grow during suspended in the atmosphere, usually within the cloud. The snow fall is an example of precipitation.
At what temperature snow fall?For the formation of snow, the temperature required at the level of air at which it form must be below or at freezing 32° F or 0°C. Snow falls with the warmer air and it ends up on the ground in the form of rain. Rain also falls in colder layers and end up in the form of sleet. We also have the freezing rain which starts off in a warmer layer and freezes when the surface layer of air is below or at freezing.
What is Precipitation?Precipitation is a type of water phase which dorm in the atmosphere and falls on the earth surface.
Types of precipitationRainHailSnowThus, we concluded that the snow falls ln a cold afternoon is an example of precipitation.
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What would be a rocket’s acceleration [a = (End velocity - Start velocity) / time] in space if it fires its engines and starts moving from 1000 m/s to 2500 m/s in 10 seconds?
The acceleration of the rocket would be 150 m/s^2.
Initial velocity, u=1000 m/s
Final velocity, v=2500 m/s
Time taken, t=10 seconds.
According to equation of motion,
v=u+at
2500=1000+10a
2500-1000=10a
1500=10a
a=150 m/s^2.
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a certain ore is 27.9'.9% nickel by mass. how many kilograms of this ore would you need to dig up to have 85.0 g85.0 g of nickel?
To get 85g of nickel, 0.304 kilogram of the ore must be mined.
27.9% of what = 85g
0.279 * x = 85
x = 304.6g = 0.304kg
What is ore?
Ore is a naturally occurring rock or silt that has one or more precious minerals in it that may be extracted, processed, and sold for a profit. Metals are the most common valuable minerals found in ore. To remove the valuable metals or minerals from ore, it is mined from the earth and then processed or refined, frequently by smelting.
An ore is a naturally occurring collection of minerals from which metals can be profitably extracted. Originally, the term "ore" solely referred to metallic minerals, but today it also refers to nonmetallic materials that have been deposited in rock after it has formed.
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What is the best choice of reagent to perform the following transformation?.
a. h2o
b. h2so4
c. naoch3
d. kotbu
the best choice of reagent to perform the following transformation is H₂O and H₂SO₄
What is reagent with example?
In chemistry , the term "reagent" denotes a chemical ingredient, this will also be stated as an "Orko". this is often typically found in a compound. (a compound or mixture, typically of inorganic or small organic molecules) introduced to cause the specified transformation of an organic substance.Reagents could also be compounds or mixtures. In chemistry , most are small organic molecules or inorganic compounds.
What is difference between reagent and reactant?Reactant: Reactants are the starting materials that undergo changes during a reaction .
Reagent: Reagents are the compounds that are added to a system so as to cause a chemical reaction.
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If i have 82 ml of a solution with a molarity of 5.3 m nabr, how many ml of a 1.1 m nabr solution can i prepare? 395.1 ml 0.07 ml 17.0 ml 478.1 ml
I have 82 ml of a solution with a molarity of 5.3 m nabr. We can make 395.1 ml ,1.1M NaBr solution from 82 ml of 5.3 M NaBr solution.
What is molarity?
The number of moles of solute per litre of solution is known as molarity or molar concentration, and it may be determined using the equation: To convert between the mass or moles of solute and the volume of the solution, utilise molar concentration.
The ratio of the moles of the solute whose molarity needs to be calculated is multiplied by the volume of solvent needed to dissolve the supplied solute.
Molarity (M) = moles of solute ÷ liters of solution
I have 82 ml (= 0.082 liter) of a solution with a molarity 5.3 M NaBr. Here the moles of solute is-
5.3 = Moles of solute ÷ 0.082
Or, Moles of solute = 0.4346 moles
Now if we dilute the 82 ml, 5.3 M NaBr solution to make a new solution with a molarity of 1.1 M , the total volume of the new solution will be-
1.1 = 0.4346 ÷ liters of solution
Or, liters of solution = 0.3951
0.3951 liters = 395.1 ml
So, we can make 395.1 ml ,1.1M NaBr solution from 82 ml of 5.3 M NaBr solution.
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The bohr radius theoretically is the __________ distance an electron can approach the nucleus in the hydrogen atom.
The bohr radius theoretically is the equal distance an electron can approach the nucleus in the hydrogen atom.
Bohr radius named after by Niels Bohr because Niels Bohr proposed the bohr model of an atom. Bohr radius is the mean radius of the orbit of an electron around the nucleus of a hydrogen atom at its ground state and is approximately equal to 5.29177×10⁻11 . the Bohr radius approximately equal to the most probable distance between the nucleus and the electron in a hydrogen atom in its ground state. so theoretically distance an electron is equal approach the nucleus in the hydrogen atom.
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The partial melting of ____ will yield mafic (basaltic) magma. diorite granite peridotite rhyolite andesite
The answer would be mantle rocks i.e., the partial melting of mantle rocks will yield basaltic magma, diorite granite peridotile rhyolite andesite.
The mantle rocks are partially melted because the mantle is comprises of many various kinds of minerals, it does not melt accordingly. As minerals with lesser melting points converted into liquid magma, those with inflated melting points endure as solid crystals. This method is called as partial melting.
The properties that aim partial melting Rocks is because of decompression, heat input, or addition of a flux.
Mantle rocks are also known as semi molten rocks , generally silicates are found there.
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The renal control mechanism of restoring the acid-base balance is accomplished through which process?
Re absorption of H[tex]CO_{3}[/tex] and excretion of H+ restores acid-base balance through the renal control mechanisms.
What is renal mechanism?
The renal system consists of the kidney, ureters, and therefore the urethra. the general function of the system filters approximately 200 liters of fluid a day from renal blood flow which allows for toxins, metabolic waste products, and excess ion to be excreted while keeping essential substances within the blood
Why is renal function important?
Renal function is important for homeostasis. The kidneys play important pleiotropic roles including removal of metabolic waste products and maintenance of water–electrolyte balance and vital sign . Early diagnosis of renal dysfunction and institution of appropriate therapy are vital to survival.
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The chemical formula for octane is: ch3ch26ch3 calculate the molar mass of octane. round your answer to 1 decimal place.
The chemical formula for octane is: ch3ch26ch3 114073 is the molar mass of octane.
What is molar mass ?The molar mass of a chemical compound is determined in chemistry by dividing the mass of a sample of that compound by the quantity of that compound, which is the number of moles in that sample, measured in moles. A substance's molar mass is a bulk attribute rather than a molecular one. The compound's molar mass is an average over multiple samples, each of which will likely have a different mass because of the existence of isotopes.
The molar mass is most frequently calculated from the standard atomic weights, making it a terrestrial average and a function of the relative abundance of the constituent atoms' isotopes on Earth. The molar mass is suitable for converting between a substance's mass and a quantity.
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Which solid has the highest melting point? why? c(s, diamond), kr(s), nacl(s), h2o(s
Diamond has the highest melting point, which is close to five thousand.
Which of the following solids has the highest melting point?When it comes to melting points, metallic solids vary greatly. Tungsten has the highest melting point of 3422°C, while mercury has the lowest melting point of -38.83°C. They are gleaming, sturdy, and malleable. Because of their delocalized electrons, they can conduct electricity.Diamond has a very high melting point because it takes a lot of energy to break through the many strong covalent bonds.As a result, we can conclude that diamond melts at around 9,000 K and between 0.60 and 1.05 TPa along the Hugoniot.covalent network solid
As a result, diamond is classified as a network covalent solid. Diamond is the hardest substance, has a high boiling and melting point, and is a poor conductor as a result of this. It is difficult due to the intermolecular covalent bonds. As a result, diamond is a network covalent solid.To learn more about solids melting point refer to
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15) CCC Patterns Changes in the state of matter (solid, liquid, gas) are
the result of different energy levels at the molecular level. Look
at the graph of the energy required to go from water ice to water
vapor. Describe the energy of the water molecules for each state.
The thermal energy of solid state is the least and the thermal energy for gaseous state is maximum.
Any substance that is present around us exists in three states i.e, solid, liquid and gas.
The two major factors that affect the state of the substance are thermal energy and intermolecular interactions. These factors are shown in the adjoining image.
When energy in the form of heat is provided to ice, it first converts into liquid water and finally into steam. This conversion has been shown in the graph present in the adjoining diagram.
As energy is added to it, the solid state has the lowest energy, the energy of the liquid state is more than the solid state and the maximum energy is of gaseous state.
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mercury, also known as quicksilver, is a metallic element and a liquid at room temperature. calculate mercury's density if a sample of mercury is found to have a mass of 537.0537.0 g and a volume of 39.9939.99 ml.
The mass upon volume take the measure of the substance is known to be its density.
As we know the formula of density is:
density = mass / volume. ------ (1)
Mercury is a heavy silver colored element.
Also called as a quicksilver , it's formula is Hg.
Mercury's atomic number is 80.
According to question,
It is given in the question,
Mass of mercury ( Hg) = 537.0537.0 g
Volume of mercury (Hg) = 39.9939.99 ml
Now putting the given values in formula (1)
density = 537.0537.0 / 39.9939.99
density = 13.42 g/ml
Hence, the density of mercury is 13.42 g/m
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Which statement would be the most useful for deriving the ideal gas law?
O Volume is directly proportional to the number of moles.
O Volume is inversely proportional to the temperature.
O Pressure is directly proportional to the volume.
O Pressure is inversely proportional to the number of moles.
Mark this and return
hs
The correct answer is a) Volume is directly proportional to the number of moles.
The Volume is directly proportional to the number of moles according to the Ideal Gas Equation.
Ideal Gas Equation is given as:
PV = nRT
where, P is the Pressure of the gas
V is the Volume of the gas
n is the number of moles of gas
R is the Universal Gas Constant
T is the Temperature
Since, it can be seen from the Ideal Gas Equation that the Volume is directly proportional to the number of moles, Universal Gas Constant and Temperature.
Similarly, Pressure is directly proportional to the number of moles, Universal Gas Constant and Temperature.
Also, the Pressure is inversely proportional to the volume of the gas.
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If solutions of co(no3)3 and koh are mixed, how many precipitation reactions will occur?
If solution of Co(NO3)3 and KOH are mixed then following reaction will occur:
Co(NO₃)₃ + KOH → Co(OH)₃ + KNO₃
This is double displacement reaction.The ions swap positions in a double displacement process. The first ion's positive ion moves to the second ion's negative ion, and the second ion's positive ion moves to the first ion's negative ionIn this reaction cobalt nitrate reacts with potassium hydroxide to form cobalt hydroxide which is insoluble in water and therefore it will form precipitate in the solution.Other product will be potassium nitrate ( KNO₃). Nitrates are soluble in water therefore KNO3 will not form precipitate in the solution.let us balance the equation:
Co(NO₃)₃ +3 KOH → Co(OH)₃ +3 KNO₃
Now we will split strong electrolyte into ions:
Co³⁺ + 3NO₃⁻ + 3K⁺ + 3OH⁻ = Co(OH)₃ + 3K⁺ + 3NO₃⁻
So the net ionic equation will be
Co³⁺ + 3OH⁻ = Co(OH)₃
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A huge candy bar measures 35.6cm long, 3.8cm tall, and 4.2cm wide. The bar has a total Mass of 633.6
grams, including a delicious 198 grams of fat!
Calculate the Density of this wonder of the chocolate.
The density of the chocolate, given the data is 11.15 g/cm³
What is density?The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
How to determine the density of the chocolateThe following data were obtained from the question:
Dimension = 35.6 cm × 3.8 cm × 4.2 cmVolume = dimension = 35.6 cm × 3.8 cm × 4.2 cm = 568.176 cm³Total mass = 633.6 gDensity of chocolate =?The density of the chocolate can be obtained as follow:
Density = mass / volume
Density of chocolate = 633.6 / 568.176
Density of chocolate = 11.15 g/cm³
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for what maximum kinetic energy is a collision between an electron and a hydrogen atom in its ground state definitely elastic?
The calculated kinetic energy is 10.2 J
Measurements have been made of the cross section for the elastic scattering of electrons with energies lower than 10.2 eV by free hydrogen atoms. The signal from the electrons that were scattered by the beam appeared at the modulation frequency and at a predetermined phase, allowing for their identification. The ratio of the hydrogen atoms and the molecule's cross sections was directly measured, and absolute values for the atomic cross section were calculated using the absolute molecular cross-section.
The experimental findings support the theory.
Electron energy in the ground state is 0.13.6
In the second energy level, 3.4
Total energy level difference = 10.2
Thus, kinetic energy equals 10.2.
Therefore, we are aware that some electron kinetic energy was transmitted to the hydrogen atom during an elastic collision.
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I need help with ten and eleven
Answer:
11no:4.9%
Explanation:
4.9% bones are there in the human body in hips and legs
Relative conductance is the ability of a specific conductor to carry electrons as compared to the ability of a(n) ___ conductor to carry electrons.
Relative conductance is the ability of a specific conductor to carry electrons as compared to the ability of a copper conductor to carry electrons.
The relative conductance (g'X) of a given ionic species is the conductance for that single ion divided by the total conductance for all of the ionic species (i.e., g'X = gX/g Total). The flow of free electrons in the form of an electric current is referred to as conduction. The inverse of resistivity is conductivity. That is 1/ and has a siemens per meter, or S/m, value. From zero (for a perfect insulator) to infinity, conductivity is possible (for a perfect conductor). A super conductor has nearly no ohmic resistance and limitless conductance
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Molecule in a pizza that is a polymer; has oxygen, hydrogen, and sulfur atoms; and is hydrophilic. what kind of molecule is?
The molecule in this pizza is a "protein" because it is already mentioned and cleared from the question that it is a polymer, hydrophilic, and it's made up of oxygen, hydrogen, and sulfur atoms.
Explanation :
Amino acid is a simple term defined as an organic chemical compound that comprises of an acidic carboxyl group (COOH), a basic amino group (NH_2NH2).
It is unique chain group.
Protein : The hydrophilic, macromolecule (polymer) that is made as a result of the unison of the chain of the many amino acids is known as Protein.
Protein normally comprises of various elements such as Oxygen (O2), Hydrogen (H2), Sulphur atoms.
Hence, it is pretty much clear from the above explanation that molecule in a pizza that is a polymer, has O2, H2 and Sulphur atoms and that is also hydrophilic is a molecule of "Protein".
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Ashton wants to find the
volume of a block of
wood. The density of the
block was 30 g/mL and the
mass of the block was 125
g. What is the volume of
the block of wood?
►
The volume of the wood is 4.167 mL.
All three-dimensional objects have a certain amount of volume. It's the area that a particular object takes up.
Mass is the total amount of matter of an object or a particle. This term is also used to measure inertia, which is the body's resistance to acceleration when a net force is applied. A body's mass has an impact on how strongly it attracts other bodies through gravity.
The density of the wooden block is 30 g/mL.
The mass of the wooden block is 125 g.
So, m = 125 g
ρ = 30 g/mL
The density of an object is given as the mass of the object per unit volume.
Therefore,
density = mass / volume
ρ = m / V
V = m / ρ
V = 125 g / 30 g/mL
V = 4.167 mL
Hence, the volume of the block of wood is 4.167 mL.
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experiment 1: spectroscopy-infrared (ir) spectroscopy and nuclear magnetic resonance (nmr) spectroscopy
(IR) spectroscopy analyses a sample using infrared radiation. nuclear magnetic resonance (NMR) spectroscopy makes use of the spin states of protons and, to a lesser degree, other nuclei.
what is spectroscopy-infrared (ir) spectroscopy and nuclear magnetic resonance (nmr) spectroscopy?
As the name suggests, infrared (IR) spectroscopy analyses a sample using infrared radiation, which is a range of frequencies below the visible spectrum. However, IR spectroscopy works with wavenumbers as opposed to describing the light in terms of frequencies (the reciprocal of wavelength).
In order to identify a molecule, nuclear magnetic resonance (NMR) spectroscopy makes use of the spin states of protons and, to a lesser degree, other nuclei. The two spin quantum states that we identified as +1/2 and -1/2 for electrons are possible.
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Perform each operation. Express your answers to the correct number of significant figures.
a. 61.2 m + 9.35 m + 8.6 m
b. 9.44 m – 2.11 m
c. 1.36 m + 10.17 m
d. 34.61 m – 17.3 m
In the correct significant figures, the solutions to the given problems are;
61.2 m + 9.35 m + 8.6 m = 79.15 m9.44 m – 2.11 m = 7.33 m1.36 m + 10.17 m = 11.53 m34.61 m – 17.3 m = 17.31 mWhat is significant figure?The term significant figures refers to the number of important single digits in the coefficient of an expression in scientific notation.
61.2 m + 9.35 m + 8.6 m = 79.15 m
9.44 m – 2.11 m = 7.33 m
1.36 m + 10.17 m = 11.53 m
34.61 m – 17.3 m = 17.31 m
Thus, in the correct significant figures, the solutions to the given problems are;
61.2 m + 9.35 m + 8.6 m = 79.15 m9.44 m – 2.11 m = 7.33 m1.36 m + 10.17 m = 11.53 m34.61 m – 17.3 m = 17.31 mLearn more about significant figures here: https://brainly.com/question/24491627
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a cell containing 97% h2o is placed into a 90% h2o solution. the solution is to the cell, which would cause the size of the cell to
A cell containing 97% h₂o is placed into a 90% h₂o solution. the solution is to the cell and there the size of the cell will shrink .
What is a solution ?A particular kind of homogenous mixture made up of two or more substances is known as a solution. The solution is formed when a solute is a substance that has been dissolved in a solvent, which is the other substance in the mixture.Solute + Solvent = Solution
The cell will cremate because the water in the solution will gets released and there the state of equilibrium exists and that can be determined as Hypertonic solution.
A liquid that has a higher concentration of dissolved particles than regular cells and blood do, like salt and other electrolytes. For instance, wounds are soaked in hypertonic liquids.
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Calculate the energy of a gamma ray photon whose frequency is 5.02x10^20 Hz
When molecules fluoresce, the emitted photon has ________ energy compared to the absorbed photon.
In molecules fluoresce, the emitted photon has lower energy when compared to the absorbed photon.
What kind of molecules show fluorescence?The most extreme fluorescence is found in compounds having aromatic levels with low-energy π→π∗ transitions. A few aliphatic, alicyclic carbonyl, and positively conjugated double-bond structures also show fluorescence. Most unsubstituted aromatic hydrocarbons fluoresce in the solution again.
What makes a molecule fluoresce?If a molecule soaks the light of one wavelength and emits it in another i.e., fluoresces, we reach that molecule as a fluorophore.
Some molecules are capable of being eager, via absorption of light energy, to a higher energy state, also named an excited state.
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If 30.0 ml of 0.15 m ba(oh)2 was needed to neutralize 50.0 ml of an h3po4 solution. what is the concentration of the original h3po4 solution?
Barium hydroxide is a strong diprotic base and phosphoric acid is a weak triprotic acid. Therefore the balanced acid-base reaction requires a 3:2 molar ratio:
First we find the moles of barium hydroxide reactant:
Volume of barium hydroxide (given) = V1=0.0300 L
Molarity of barium hydroxide (given) = C1=0.15 M
Moles of barium hydroxide = n1=V1×C1=0.0045 mol
For neutralization we require 2/3 the moles for phosphoric acid:
Moles of phosphoric acid = n2=23×0.0045 mol=0.0030 mol
Volume of phosphoric acid (given) = V2=0.0500 L
Molarity of phosphoric acid = n2V2=0.0030 mol/0.0500 L=0.060M
What is Neutralization Reaction?
3Ba(OH)2+2H3PO4→Ba3(PO4)2+6H2O
Conjugate base and acid are the results of the reaction between a Bronsted acid (proton donor) and a Bronsted base (proton acceptor). When both of these reactants have been completely consumed, leaving only the product species, a neutralisation reaction takes place. The stoichiometry of the balanced acid-base reaction equation is used to determine the ratio of molar amounts needed for neutralisation.
Therefore,
If 30.0 ml of 0.15 m ba(oh)2 was needed to neutralize 50.0 ml of an h3po4 solution. what is the concentration of the original h3po4 solution?
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If one or more nucleotide pairs are deleted from a dna strand, this is known as a:_________
a. frameshift mutation
b. point mutation
c. missense mutation
d. silent mutation
If one or more nucleotide pairs are deleted from a DNA strand, this is known as a frameshift mutation.
What is frameshift mutation? explain its function.
An indel (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three results in a frameshift mutation, also known as a framing error or reading frame shift. The triplet structure of gene expression by codons means that an insertion or deletion might alter the reading frame (the arrangement of the codons), leading to a translation that is entirely different from the original. A frameshift mutation is different from a single-nucleotide polymorphism, in which a nucleotide is substituted rather than inserted or deleted, and the protein is more altered the sooner in the sequence the deletion or insertion occurs.
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