When two protons are extremely close to each other, there is a strong nuclear force between them.
The force between a proton and neutron is same as the force between two proton, which the nuclear force. Nuclear forces can also be called as the nuclear interactions. Nuclear forces affects the neutrons and protons, both nucleons in identical or similar way.
Strong nuclear force is one of the fundamental forces of the nature and it is strongest among the four. Four fundamental forces are -Gravitation, strong nuclear force, weak nuclear force, and electromagnetism.
The energy that is used in nuclear power and nuclear weapons, the nuclear force has an important role in storing it. To bring the charged protons together against their electric repulsion, energy is required. When the protons and neutrons are bound together by the nuclear force they form a nucleus, this energy is in stored form.
So, the strong forces holding two protons extremely close is strong nuclear forces.
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Which of the following demonstrates a chemical change? (1 point)
• dry ice vaporizing
•
iron (Fe) reacting to water((H,O)) and
oxygen(O) to form iron oxide(Fe2Og)
O sugar and water mixing to create sugar water
• steam condensing on a mirror
The reaction that demonstrates a chemical change is iron (Fe) reacting to water((H,O)) and oxygen(O) to form iron oxide(Fe2Og). That is option B.
What is a chemical change?A chemical change is defined as the change that occurs when two substances reacts or combines to form an entirely new product.
The following are the features that shows that a chemical change has taken place. They include:
colour change, precipitate formation, gas formation, smell change, andchange in temperature.When the above signs are seems there is every reason to accept the fact that a chemical change has occurred in the chemical reaction that took place.
From the chosen option, the reactants and product of the chemical reaction are:
Iron (Fe) + water (H2O) --> iron oxide(Fe2Og)
This reaction is a chemical reaction as the product formed leads to a colour change known as rust.
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The absolute pressure in a compressed air tank is 180 kpa. what is this pressure in psia?
The absolute pressure in a compressed air tank is 180 kpa. pressure in psia is 26.10 psia
The pressure of having no matter inside a space, or a perfect vacuum called absolute pressure. it indicates how much higher your process pressure is than that of a process in vacuum, so measurements are always positive. for calculate pressure
P=(180kPa)(1 psia/6.895 kPa) = 26.10 psia
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What is the nucleotide sequence of an mrna strand that has been transcribed from the dna sequence ggtagc?
CCAUCG is the nucleotide sequence of an mrna strand that has been transcribed from the DNA sequence ggtagc.
What is a nucleotide sequence?Transfer RNAs interact with the ribosome system to translate a nucleic acid sequence, known as a messenger RNA or mRNA, into the protein it encodes. Transfer RNAs partition the nucleic acid sequence into triplet codons, each of which specifies one amino acid, by binding to three nucleotides at once. The sequence does not contain punctuation signals to indicate which reading frame should be used, hence the nucleic acid can be read in three different phases or reading frames depending on the point at which division into codons begins. An addition or deletion in the nucleic acid sequence that changes the translation process from one reading frame to another is known as a frameshift mutation.To know more about the nucleotide sequence, refer:
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Which of the following best compares a fission reaction and a fusion reaction?
A.Both reactions absorb energy; in a fission reaction, two smaller atoms combine to form one larger atom, while in a fusion reaction, one large atom splits into smaller atoms.
B.Both reactions absorb energy; in a fission reaction, one atom splits into two smaller atoms, while in a fusion reaction, two smaller atoms combine to form one larger atom. C.Both reactions release energy; in a fission reaction, two smaller atoms combine to form one larger atom, while in a fusion reaction, one large atom splits into smaller atoms.
D.Both reactions release energy; in a fission reaction, one atom splits into two smaller atoms, while in a fusion reaction, two smaller atoms combine to form one larger atom.
Answer:
D.
Explanation:
You are doing a lab and the instructions tell you to use 100x magnification. you know the eyepiece has 10x the magnification. what objective lens would you use to reach 100x magnification?
The objective lens that would you use to reach 100x magnification is known as the Oil immersion objective lens.
What is Magnification?Magnification may be defined as the process of making enlarged views of smaller objects like cell specimens with the help of tools and devices.
The Oil immersion objective lens is known to have the most powerful magnification with a whooping magnification range of approximately 1000x when significantly combined with a 10x eyepiece.
Therefore, the Oil immersion objective lens is the objective lens that would you use to reach 100x magnification.
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The density of lead is 11.4g/cm^3. the mass of a lead ball with a radius of .50mm is:_________
The density of lead is 11.4 g/cm³. The mass of a lead ball with a radius of 0.50mm is 5.9714226 x 10⁻² g.
The density of a substance is defined as the mass of substance per unit of its volume. Density is represented by the symbol, ρ.
The formula for density is -
Density (ρ) = mass (m)
volume (v)
Given :
Density of lead = 11.4 g/cm³
Radius of lead ball = 0.50 mm = 0.05 cm
Since,
Vsphere = 4/3 π r³
v = 4 × 3.14 × (0.05)³
3
v = 4.18 x (1.25 x 10⁻³)
v = 5.225 x 10⁻³
Since,
Density = mass
volume
11.4 g/cm³ = mass
5.225 x 10⁻³
mass = 11.4 x (5.225 x 10⁻³)
mass = 5.9565 x 10⁻² or 0.05955 g
So, the mass of a lead ball with a radius of 0.50mm is 5.9565 x 10⁻² g
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A small airplane takes on 326 l of fuel. part a if the density of the fuel is 0.821 g/ml, what mass of fuel has the airplane taken on?
The mass of fuel has the airplane taken on is 201145g.
Use the formula [tex]mass = density \times volume[/tex]. And since we are given the value of density, we just substitute it to the formula since the density of a compound is constant at a given temperature. So we have:
mass = [tex]0.821 \dfrac{g}{mL}\times(245 L\times\dfrac{1000mL}{1L}) =201145g[/tex]
Density is the dimension of how tightly a cloth is packed together. It is defined as the mass per unit volume. Density Symbol: D or ρ Density Formula: ρ = m/V, where ρ is the density, m is the mass of the object and V is the volume of the object.
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Metric Conversions
1: convert 104 KM to M
2: convert 16 CM to MM
3: convert 5.6 KG to MG
Answer:
1. 104000m
2. 160mm
3. 5600000 mg
Phosphoric acid can be prepared by reaction of sulfuric acid with “phosphate rock” according to the equation:
Ca3(PO4)2 + 3H2SO4 => 3CaSO4 + 2H3PO4
How many oxygen atoms are there in 1.75 ng of Ca3(PO4)2?
A)3.4 * 10^12
B)2.72 * 10^13
B) 2.72 * 10^13 oxygen atoms are there in phosphoric acid.
The most significant phosphorus oxygen acid, also known as orthophosphoric acid (H3PO4), is used to create phosphate salts for fertilizers. Additionally, it is utilized in the production of albumin derivatives, dental cement, sugar, and textile manufacturing. It is used in food goods as an acidic, fruity flavoring.
A less concentrated version of phosphoric acid is a colorless syrupy liquid, while pure phosphoric acid is a crystalline solid with a melting point of 42.35° C (or 108.2° F). While white phosphorus is used to create acid with a higher purity, phosphate rock is used to create crude acid. Three classes of salts are produced by phosphoric acid depending on whether one, two, or three hydrogen atoms are substituted.
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What were the initial observations that led to the discovery of the ozone hole?
OCFCs were being used extensively.
Ozone levels in the upper atmosphere were decreasing.
OCFCs were found in the atmosphere at high levels.
Antarctica had cold temperatures.
OCFCs were found in the atmosphere at high levels.
Ozone absorbs the maximum of the ultraviolet radiation from the sun. faraway sensing is the technology of obtaining statistics about gadgets or regions from a distance, usually from aircraft or satellites. A Lidar mild Detection and the ranging image were created with data accrued by NOAA's country-wide Geodetic Survey. In 1985 Jonathan Shanklin turned into a junior researcher at BAS while he determined a hole in the invisible defense that protects us from solar radiation.
The ozone layer, which lies high within the ecosystem, shields us from harmful ultraviolet UV rays that come from the sun. Human activities successfully punched a hollow in it, through the use of gases like chlorofluorocarbons CFCs in spray cans and refrigerants, which wreck down ozone molecules in the top environment. Depletion of the ozone layer has outcomes on humans, animals, and plant life. This is typically a consequence of higher UV degrees achieving us on earth. The chlorofluorocarbons act like ultraviolet radiation inflicting a big amount of ozone to be produced.
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When drawing conclusions from the data in a scientific claim, you need to evaluate the person making the claim. the person making the claim should be?
When drawing conclusions from the data in a scientific claim , the person making the claim should be trained in that field in which he or she is making claim.
Claim made by scientists in there research or theory is known as Scientific claim. It is based generally on evidences and systematic observation . These claims should be supported by proofs and pre existing theories so that this can be relied on.
But every scientific claim is not true and thus is non reliable because of faults and flaws made during the experiment and investigation .
Therefore to make a claim reliable , the person making the claim should have abundance knowledge of it and have done sufficient background search of the topic on which he or she is making the claim. Also he or she should be trained in the field in which they are making the claim then only the claim can be trusted and the theories and conclusion can be made out of it.
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What will happen to the potency of acetylcholine after replacing the acetyl group with propionyl or butyryl groups?
The potency of acetylcholine after replacing the acetyl group with propionyl or butyrly group decreases.
Its is a organic chemical that function in the brain and body fofmany types of animal ,and humans also as neurotransmitter.
It act as a messenger , that plays a very important role in the central and peripheral nervous system.
The acetylcholine is important for autonomic body functions, muscle control and memory , learning and attention.
Lack of acetycholine cause no contraction in muscles.
Excess of acetylcholine causes cramps , muscular weakness blurry vision, diarrhea etc.
Propionyl or butyryl is higher homologus group than acetyl , this is the reason the potency will decreases or reduces its activity.
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which component of the following reaction is the enzyme? sucrose sucrase water → sucrase glucose fructose
Sucrase is the enzyme in the given reaction.
Enzymes help proceed with chemical reactions faster in the body. They play a key role in digesting food, respiration, and other chemical processes happening in the body.
Sucrase is an enzyme that helps with digestion by the hydrolysis of sucrose into glucose and fructose. They are localized in the brush holder for the absorption of food. The body won't absorb sucrose in the absence of sucrase.
Sucrase is also known as invertase and it also occurs in plants for the hydrolysis of sucrose.
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The molecule of the type ml4 consists of four single bonds and no lone pairs. what structure is it expected to assume?
It expected to assume tetrahedral in shape.
What is tetrahedral shape?Tetrahedral molecules are those in which the central atom has four bonds and no lone pairs. The atoms bonded to the central atom are located at the four corners of a tetrahedron, and there are 109.5° angles between them.
A common example of a tetrahedral structure is methane, which contains four hydrogen atoms around the carbon atom. The nitrogen atom at the centre of the ammonium ion is surrounded by four hydrogen atoms.
The carbon atoms are organised tetrahedrally in a diamond. With a C-C-C bond angle of 109.5 degrees, each carbon atom is joined to four more carbon atoms at a distance of 1.544 x 10⁻¹⁰metres. It produces an endless network of atoms and has a robust, hard three-dimensional structure.
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The molecule of the sort ML₄ consists of four single bonds and no lone pairs.The structure is it expected to assume is tetrahedral
What is meant by tetrahedral structure?
Tetrahedral may be a molecular shape that occurs when there are four bonds and no lone pairs in the molecule's central atom. The atoms bonded to the central atom are located at the four corners of a tetrahedron, with 109.5° angles between them.
What is a Molecule?
A molecule may be a particle made up of two or more atoms that are chemically bonded together; the number of atomic nuclei making up a molecule is a determinate number. for instance , HCl(g) may be a molecule made of one hydrogen atom bonded to one chlorine atom.
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What is the percent yield of a reaction in which 43.9 g of tungsten(vi) oxide (wo3) reacts with excess hydrogen gas to produce metallic tungsten and 9.60 ml of water (d= 1.00 g/ml)?
The percent yield of reaction of tungsten (vi) oxide with excess hydrogen gas to produce metallic tungsten and 9.60 mL of water is 101.25%
The balanced chemical equation of reaction is -
WO₃ + 3H₂ → W + 3H₂O
Given :
Mass of WO₃ = 43.9 g
Molar mass of WO₃ = 231.8 g/mol
Molar mass of H₂O = 18 g/mol
So,
Number of moles of WO₃ = Given mass
Molar mass
moles of WO₃ = 43.9 g = 0.18 mol
231.8 g/mol
Now, to calculate number of moles of H₂O, we use the balanced equation. From the equation,
1 mole of WO₃ reacts to give 3 moles of H₂O
So, 0.18 mole of WO₃ reacts to give 3 x 0.18 = 0.54 moles of H₂O
To calculate mass of H₂O,
Mass of H₂O = Moles x molar mass
= 0.54 mol x 18 g/mol
= 9.72 g
Therefore, the theoretical yield is = 9.72g
For actual yield,
Actual mass = density x volume (density =mass/volume)
= 1.00 g/mL x 9.60 mL
= 9.6 g
Therefore, the actual yield is 9.6 g
Now, for percent yield of reaction,
% yield = actual yield x 100
theoretical yield
= 9.72 x 100
9.6
= 101.25 %
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An unknown substance has a density of 2.5g/ml. is this a physical or
chemical property? how do you know?
1 point
density is a chemical property because every substance has a unique density that we
can use to identify it.
density is a physical property because we can find it for a substance without
changing the identity of the substance.
o density is a chemical property because all chemicals have a density.
o density is a physical property because we can measure it.
An unknown substance has a density of 2.5g/ml. Density is a physical property because we can find it for a substance without changing the identity of the substance. The correct option is B.
What are physical properties?Physical properties are those properties that can be seen by seeing the matter of the object. Density is a physical property. It does not depend upon the chemical composition of the object.
Thus, the correct option is B. Density is a physical property because we can find it for a substance without changing the identity of the substance.
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It is often helpful to remember the acronym pass when using a fire extinguisher. fill in the word that corresponds with each letter to complete the steps needed for operation of this device.
the acronym PASS involves the steps needed for the operation of the fire extinguisher which are Pull, Aim, Squeeze, and Sweep.
P- Pull the pin, this step will allow you to discharge the extinguisher.
A- Aim the nozzle at the base of the fire, If aim at the flames, which is most frequently the temptation, the agent in the extinguisher will fly right through and will do no good, You had to hit the fuel.
S- Squeeze the lever slowly, In this step depresses the button that releases the pressurized extinguishing agent in the extinguisher.
S- Sweep the spray from side to side over the fire, Start using the extinguisher from a safe distance away, then move forward to the reduced flame, until the fire is completely out, but keep an eye, on the area it may re-ignites.
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Why are the properties of a compound different than the elements that make it up.
The houses of compounds are one-of-a-kind and in a few instances very one-of-a-kind, from the ones of the factors that compose them. This is because Elements combine compounds to grow to be absolutely one-of-a-kind materials with specific houses.
Elements combine may be chemically blended into compounds, therefore, a compound includes extra factors blended, in exact proportions, with the aid of using chemical means. Compounds can be shaped with the aid of using combining atoms in their constituent factors with the aid of using ionic bonds or with the aid of using covalent bonds.
An Elements compound is a completely unique substance that paperwork while or extra factors integrate chemically. A compound usually includes the identical factors withinside the identical ratio. If the identical factors integrate into one-of-a-kind ratios, they shape one-of-a-kind compounds. Types of compounds encompass covalent and ionic compounds.
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When phosphate is added to adp to form the energy-storing molecule atp, this is known as ________ and, since water is also produced, this reaction is also considered a ________ reaction.
When phosphate is added to ADP to form the energy-storing molecule ATP, this is often often known as phosphorylation and, since water is additionally produced, this reaction is additionally considered a condensation reaction.
What are phosphorylation and condensation?
Phosphorylation could also be a condensation reaction that is important for the functioning of sugars, lipids, and proteins and is critical when it involves regulating the function of enzymes. one among the simplest phosphorylation reactions in nature is the phosphorylation of glucose which is the first step in glycolysis.
What happens when a phosphate molecule is added to ADP?
When the cell has extra energy (gained from breaking down food that has been consumed or, within the case of plants, made via photosynthesis), it stores that energy by reattaching a free phosphate molecule to ADP, turning it back to ATP. The ATP molecule is simply like a rechargeable battery.
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Which model of the atom has electrons traveling in specific paths around the nucleus?
Answer:
Bohr's model of hydrogen is based on the nonclassical assumption that electrons travel in specific shells, or orbits, around the nucleus.
Explanation:
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Q21 90g of glucose is dissolved in water. The glucose solution is fermented. C6H12O62CO₂ + 2C₂H₂OH glucose, M, = 180 After the fermentation finishes, 6.8g of ethanol is obtained from the solution. What is the percentage yield of ethanol? A 7.4 B 7.6 C 14.8 ethanol, M, = 46 D 29.6
The correct answer is 14.8%.
The given reaction,
C_6H_12O_6 ----> 2CO₂ + 2C₂H₂OH
A key idea in chemistry is stoichiometry, which determines the quantity of reactants or products in a chemical reaction and aids in understanding different reactions and the proportions in which they might take place. A combination of two Greek terms is stoichiometry. Stoicheion, which denotes an element, and metron, which denotes a unit of measurement
mole= mass/mole mass
=90g/180g/mol
=0.5mol
According to stoichiometry
1 mol glucose = 2 mol ethanol
0.5 mol C_6H_12O_6 = 1 mole ethanol
mass of ethanol = 1 mole ×46 g/ mol
Theoretical yield = 46 g
percentage = actual yield / theoretical yield × 100
=6.8 g / 46 g × 100 = 14.78% =14.8%
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Chemical bonds that join amino acids together to form polypeptide chains are __________________bonds.
Chemical bonds that join the amino acids together to form polypeptide chains are peptide bonds. Chemical bonds are formed when two or more atoms, molecules, or ions come together to form a compound. Atoms in the resultant molecule are held together by these chemical bonds.
Bonds can be classified as ionic, covalent, or metallic in general. When a valence electron transfers from one atom to another to finish the outer electron shell chains, an ionic bond is created. Ionic bonds, covalent bonds, hydrogen bonds, and van der Waals interactions are the four categories of chemical bonds that are necessary for life.
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Consider an atom of zirconium which has a mass number of 96.how many electrons are in an atom of zirconium with a charge of 3?
An atom of zirconium which has a mass number of 96 has 37 electrons in it.
What is zirconium?Atomic number 40 and the letter Zr are used to identify the chemical element zirconium. Zircon is the name of the mineral from which zirconium gets its name. The name has a connection to the most significant source of zirconium, the Persian word zargun (zircon; zar-gun, "gold-like" or "like gold").
This transition metal closely resembles titanium and, to a lesser extent, hafnium. It is glossy, grey-white, and strong. Although it is used sparingly as an alloying agent due to its high corrosion resistance, zirconium is mostly utilised as a refractory and an opacifier.
Inorganic and organometallic compounds like zirconium dioxide and zirconocene dichloride are both formed by zirconium. There are five stable isotopes that are found in nature. The biological function of zirconium compounds is unknown.
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_______________ forces mediated by _________________ are disrupted when ice melts
Answer:
Explanation:
intermolecular forces mediated by hydrogen bonding are disrupted when ice melts.
The chemical released by the synaptic vesicles of neurons during synaptic transmission is called:___.
Answer:
a neurotransmitter
Explanation:
Set the temperature of the green box to 300k. click on start. after 10 seconds remove the wall. what is the convincing evidence that entropy increased when the wall was removed?
Convincing evidence that entropy increased when the wall was removed, when the distribution of ball speeds evened out, and there was no longer a significant difference in distributions between the two boxes.
Entropy is just a measure of disorder and affects all aspects of our daily lives. If you add more energy by heating the gas, the amount of various possibilities for arranging the energy over the molecules increases.
For example, when a hot object is placed up-to-date with a chilly object, heat flows from the warmer one to the Entropy, never spontaneously from colder to hotter. If heat were to go away from the colder object and pass to the warmer one, energy could still be conserved.
The Second Law indicates that thermodynamic processes, i.e., processes that involve the transfer or conversion of warmth energy, are irreversible because all of them lead to a rise in entropy. Entropy measures what quantity thermal energy or heat per temperature.
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Identify the oxidizing agent and the reducing agent for: ba (s) cl2 (g) --> bacl2 (s)
CL2 is the oxidizing agent and Ba is the reducing agent for :
ba (s) cl2 (g) --> bacl2 (s)
Oxidation agents are those which oxidize another substance by taking up their electrons. The other substance gets oxidized and loses electrons. The oxidation agents themselves go through reduction.
The tendency of oxidizing agents to accept electrons is due to their high oxidation states. Halogen is an example of an oxidizing agent.
Reducing agents on the other hand reduces the other substance by giving them electrons. they themselves go through oxidation. Hydrogen is an example of a reducing agent.
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The action potentials of myocardial autorhythmic cells, are due to a combination of increasing Na+ and Ca2+ ________ and decreasing k ________.
The action potentials of myocardial autorhythmic cells, are due to a combination of increasing Na⁺ and Ca²⁺ influx and decreasing K⁺
efflux .
The autorythmic cells are concentrated in many areas such as:
Sinoatrial (SA) node which is located in the upper wall of the right atrium (auricle). It initiates the cardiac cycle by generating an action potential spreading throughout both atrium via gap junctions of the cardiac muscle fibers.
These autorhythmic cells have unique ability to depolarize spontaneously, which results in a pacemaker potential. Channels of cardiac autorhythmic cells are responsible for the electrical signal that triggers heart contraction.
Autorhythmic cells begin depolarizing due to a slow continuous influx of Na⁺ and Ca²⁺, and a reduced efflux of K⁺.
Several protein channels are embedded in the plasma membrane of an autorhythmic cell that allows ions to move in and out of the cell. These are important for generating action potential.
Sodium channels : allow Na⁺ ions to enter cellFast calcium channels : allow Ca²⁺ ions to enter cellPotassium channels : allow K⁺ ions to leave the cellTo learn more about autorhythmic cells,
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The rms speed of the molecules of a gas is 200 m/s at a temperature 300 k. what is the mass of the individual molecules?
The rms speed of the molecule is 200 m/s at a temperature of 300K. Then, the mass of the individual molecule is 3.11 ×10⁻²⁵ Kg.
Given,
The rms speed of the molecule (Vrms) = 200 m/s
The temperature of the molecule (T) = 300K
We have to find the mass (M) of individual molecules.
The expression for root mean square speed measures the speed of particles in a gas is given by:-
Vrms = √3KT/M
By squaring both sides we get,
(Vrms)² = 3KT/M
(200)² = 3 × 1.33 × 10 ⁻²³ × 300 / M
Or, M = 3.105 × 10⁻²⁵ Kg
Hence, the mass of the individual molecule is 3.105 × 10⁻²⁵ Kg.
The root mean square (R.M.S) speed V of the molecules of an ideal gas is given by the expression, v=sqrt(3RTM) and v=sqrt(3KTm) where R is universal gas constant, T is the absolute (Kelvin) temperature, m is the molar mass, K is Boltzmann's constant and M is the molecular mass.
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Dilute 500 ml of 0.5 m kcl to a final volume of 3.5l. what is the resulting molarity?
Dilute 500 ml of 0.5 m kcl to a final volume of 3.5l resulting molarity is 0.1428
Molarity is the amount of a substance in a certain volume of solution. molarity is also defined as the moles of a solute per liters of a solution. molarity is calculated as M = no of moles of solute/volume of solution in liter
here, kcl is diluted as 0.5m and final volume is 3.5l so,
M = 0.5/3.5 = 0.1428
So molarity is 0.1428
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