The Bohr model for the atom explains how electrons chenges different energy levels and accounted for the emission spectra of atoms.
The Bohr model postulates that electrons orbit the nucleus at constant electricity ranges. Orbits in addition to the nucleus exist at better electricity degrees. While electrons go back to a decreased strength level, they emit energy in the shape of light.
Bohr's model shows that the atomic spectra of atoms are produced via electrons gaining energy from a few supplies, leaping as much as a better electricity degree, then without delay losing returning to a lower strength stage and emitting the strength difference among the 2 power ranges.
Bohr explained the steadiness of atoms by using presenting that electrons revolve across the nucleus inside the exact circular paths having fixed strength and while transferring in the same orbit they do now not lose or benefit from strength.
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Which of the following phrases describes the similarities between problem space theory and how the brain looks at problems
The phrases that describes the similarities between problem space theory and how the brain looks at problems is option C: They can occur quickly or slowly.
What does problem space theory entail?The category of problem-solving techniques used in social science includes the problem space theory. The problem space theory employs the strategy of characterizing the issue before seeking a resolution. The focus of a problem space is on the stages and objectives involved in solving a problem rather than providing details of a solution.
Note that Your heart rate increases as your brain releases a surge of adrenaline, causing you to become stiff and shake. Despite the absence of difficulties, the brain is programmed to find solutions. The brain invents a new problem to remedy when there is nothing to tackle.
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See full question below
Which of the following phrases describes the similarities between problem space theory and how the brain looks at problems?
They have only three steps.
They can only be used in a laboratory setting.
They can occur quickly or slowly.
They are biased against the scientific method.
which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of ni2 is increased?
Reaction Ni²⁺(aq) + 6NH₃(aq) ⇌ [Ni(NH₃)₆]²⁺ will experience a shift towards the products in equilibrium position when the concentration of Ni²⁺ is increased.
What is equilibrium shift?According to Le Chatelier's Principle: When the equilibrium is stressed, the response changes to relieve the stress. This means that adding a reactant moves the equilibrium away from the reactant to the right. Adding a product moves the equilibrium away from the product and to the left.
Equilibrium type:
Stable equilibrium.Unstable equilibrium.Neutral equilibrium.As the concentration of Ni²⁺(aq) increases, the system attempts to reach equilibrium by reducing the increased coefficient according to Le Chatelier's principle. To do this, the concentration of Ni²⁺(aq) must be lowered. Therefore, it is necessary to lower the Ni²+(aq) concentration by promoting forward reaction.
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The given question was incomplete so the complete question is as follows:
Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of Ni2+ is increased? View Available Hint(s) Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of is increased?
Ni(OH)₂(s)⇌Ni²⁺(aq)+2OH⁻(aq)
[Ni(H2O)₆]²⁺(aq)+3En(aq)⇌[Ni(En)₃]²⁺(aq)+6NH₃(aq)
Ni²⁺(aq)+6NH₃(aq)⇌[Ni(NH₃)₆]²⁺
NiS(s)⇌Ni²⁺(aq)+S²⁻(aq)
Which of the electron dot structures correctly illustrates diatomic nitrogen with a triple bond?.
The electron dot structure that correctly illustrates diatomic nitrogen with a triple bond is of diatomic nitrogen which is N≡N.
A Lewis Structure is a simplified representation of the valence shell electrons in a molecule. It is used to show the arrangement of the electrons is arranged around atoms in a molecule.
Usually in Lewis Structure, Electrons are represented by dots but in the case of bonds such as given in the given question, they are represented by lines.
Thus the electron dot structures that correctly illustrate diatomic nitrogen with a triple bond is of diatomic nitrogen which is N≡N.
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what is the rate constant for the reaction? express your answer in liters per mole per minute to two significant figures.
The rate constant for the reaction is the relation between the concentration of the reactant and the chemical rate of reaction.
The rate constant of the chemical reaction is the proportionality constant that describes the relationship between the concentration of the reactants and the chemical rate of reaction. The symbol of rate constant is k. Rate is depends on the temperature. unit for the zero order reaction is : L⁻¹ s⁻¹. unit of rate constant for the first order reaction is : s⁻¹. unit for the rate constant for second order reaction is : mol⁻¹ L s⁻¹.
Thus, The rate constant for the reaction is the relation between the concentration of the reaction and the chemical rate of reaction.
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what would be the effect on the melting point of a sample if it were not dried completely after filtering the recrystallized sample?
The melting point of the sample if it is not dried completely after filtering the recrystallized product will have a broad range and will occur at lower range than the actual value.
What is melting point?
Melting point is the temperature at which the solid form of a given substance changes to the liquid form at atmospheric pressure. It is important because, by using the physical property of a substance the substance can be identified.
The sharp range melting point of the substance indicates the purity of the substance. If the sample is not dried completely after recrystallisation, the melting point will have a broad range.
Therefore, if the sample given is not dried completely, it will be impure and the decreases the melting point of the substance. So the actual melting point of the substance cannot be determined.
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I NEED THE ANSWER ASAP
Chemicals that have leached into the soil can be made harmless by _______________________. (binary fission, bioremediation)
Chemicals that have leached into the soil can be made harmless by bio remediation .
What is bio remediation?Bioremediation is a biotechnology process that reduces or eliminates pollution. It is a type of waste management technology that uses organisms to remove or recycle pollutants from polluted areas. There are several remedial measures to clean up contaminated water and solids through chemical treatment, incineration and landfill. There are other types of waste management technologies such as solid waste management, nuclear waste management, etc.Bioremediation is different because it does not use toxic chemicals.How does it work?Bioremediation relies on stimulating the growth of specific microorganisms that use contaminants such as oils, solvents and pesticides as food and energy sources.These microbes convert pollutants into small amounts of water and harmless gases such as carbon dioxide.Can learn more about bio remediation from
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Joey is thinking about applying an equal push force to two objects, one with a small mass, and one with a large mass. What is the most likely outcome to this test?
The smaller object will have a greater change in motion.
The larger object will have a greater change in motion.
Both objects will have an equal change in motion.
Neither object will have a change in motion.
The result of the test is that the smaller object will have a greater change in motion. Option A
What is force?In the simplest sense of the word, a force could be regarded as a push or a pull. We can see that the object irrespective of the mass of the object would continue to be at rest until it is acted upon by a force.
In this question, we are told that Joey is thinking about applying an equal push force to two objects, one with a small mass, and one with a large mass. The force that could move the small mass may not move the large mass due to inertia.
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chemical analysis of an unknown compound shows that it contains 64.9% c, 13.5% h, and 21.6% o by mass. at 120oc and 750 mmhg, 2.00 l of the gaseous compound weighs 9.1 g. a. what is the empirical formula of the compound?
The empirical formula of the compound C₄H₁₀O₁.
The empirical method of a chemical compound is the simplest entire range ratio of atoms present in a compound. The empirical formula of a compound is the most effective whole variety ratio of atoms of each detail in the compound.
Step 1: decide the masses. Step 2: decide the variety of moles by dividing the grams by means of the atomic mass. Step 3: Divide the wide variety of moles of every detail through the smallest quantity of moles. Step 4: Convert numbers to complete numbers.
divide by smallest
64.9% C /12 = 5.4 5.4/ 13.5 = 4
13.5% / 1 H = 13.5 13.5 /1.35 = 10
21.6% / 16 O = 1.35 1.5/1.5 = 1
Empherical formula = C₄H₁₀O₁
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How many formula units of NaCl are there in a 10. 95 mole sample of sodium chloride
Answer: 6.59 x 10^24 formula units
Explanation: Formula units are another word for atoms, meaning we use Avogadro's number (6.022x10^23 atoms per mole), we multiply 10.95 by Avogadro's number to get the answer
Determine the energy of a photon whose frequency is 5.94 x 10^17 Hz. Answer in units of J
The energy of a photon whose frequency is 5.94 × 10¹⁷ Hz is 3.94 × 10-¹⁶J.
How to calculate energy?The energy of a photon wave can be calculated by using the following formula:
E = hf
Where;
E = energy (joules)h = Planck's constant (6.626 × 10-³⁴J/s)f = frequencyAccording to this question, a photon has a frequency of 5.94 x 10¹⁷ Hz. The energy can be calculated as follows:
E = 6.626 × 10-³⁴J/s × 5.94 x 10¹⁷ Hz
E = 3.94 × 10-¹⁶J
Therefore, 3.94 × 10-¹⁶J is the energy of the photon.
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the ground state electron configuration ofor the snigle electron in the hydrogen atom is 1s^1. what are the values of the ml and ms quantum numbers for this electron?
ml= 0 ms = +1/2 are the values of the ml and ms quantum numbers for this electron
What is quantum numbers ?
A total of four quantum numbers are used to fully describe the motion and trajectory of each electron in an atom. The combination of all quantum numbers of all electrons in an atom is described by a wave function corresponding to the Schrödinger equation. . Quantum numbers are important because they can be used to determine the electron configuration of atoms and the putative positions of atomic electrons. Quantum numbers are also used to understand other properties of atoms such as: B. Ionization energy and atomic radius.
Atoms have four quantum numbers: principal quantum number (n), orbital angular momentum quantum number (l), magnetic quantum number (ml), and electron spin quantum number (ms). The principal quantum number n is the energy of an electron and probable distance from the nucleus. In other words, it says to the size and energy level of the orbital in which the electron is placed. The number of subshells or l describes the shape of the orbitals. It can also be used to determine the number of angular nodes. The magnetic quantum number ml represents the energy level in the subshell and ms represents the electron spin. This is either upwards or downwards.
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in the decomposition of h2co3, carbon dioxide is produced. how many liters of carbon dioxide are produced when 5.00 grams of hydrogen bicarbonate breaks down at 25 c and 1.24 atm?
1.81 liters of carbon dioxide are produced when 5.00 grams of hydrogen bicarbonate breaks down.
Mass of hydrogen bicarbonate (H₂CO₃) = 5.00 g
Molar mass of hydrogen bicarbonate = 62 g/mol
Molar mass of carbon dioxide = 44.01 g/mol
Density of CO₂ = 1.97 g / L
Temperature = 25 0C
Pressure = 1.24 atm
Volume of CO₂ = ?
Write the balanced chemical equation
H₂CO₃ → CO₂ + H₂O
The molar ratio of hydrogen bicarbonate to carbon dioxide is 1 : 1
It means that when one mole of hydrogen bicarbonate decomposes it will produce one mole of carbon dioxide
Now we will find out the number of moles of hydrogen bicarbonate
number of moles = mass / molar mass
number of moles of H₂CO₃ = 5.00 g / 62 g/mol
number of moles of H₂CO₃ = 0.081 mol
Number of moles of H₂CO₃ = number of moles of CO₂
Hence the number of moles of CO₂ = 0.081 mol
Now find out the mass of CO₂
mass = number of moles × molar mass
mass of CO₂ = 0.081 mol × 44.01 g/mol
mass of CO₂ = 3.565 g
Convert mass to volume
volume = mass / density
V of CO₂ = 3.565 g / 1.97 g / L
V of CO₂ = 1.81 L
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The concentration of a solution of sodium hydroxide is 0.10 mol/dm3. What is the concentration of the solution in g/dm3?
The concentration of solution of sodium hydroxide is 4 g/dm³ as per the molar concentration concept, to convert mole/dm³ to g/dm³ multiply the concentration by molar mass, which is 40 g.
What is molar mass?Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.
The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.
Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.
The molar mass of sodium hydroxide is 40 g thus, concentration in mole/dm³×40, that is 0.10×40= 4 g/dm³.
Thus , the concentration in g/dm³ is 4 g/dm³.
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bystolic (shown below) is a pharmaceutical used to treat high blood pressure. what is the maximum number of stereoisomers possible for this structure?
the maximum number of sterioisomers that are possible for bystolic was about 10 sterioisomer
what is bystolic ?
Beta-blockers include Bystolic (Bistolic). It functions by enabling the heart to beat more gradually and weakly, reducing the volume of blood it pumps out, and thus reducing blood vessel pressure. This lessens the strain on the heart and lowers blood pressure while enhancing cardiac pumping efficiency. Additionally vasodilating, bystolic (Bistolic). It thereby prevents the muscles from contracting, keeping the blood vessels open. Blood can flow more freely as a result of relaxed blood vessels.
the maximum number of sterioisomers that are possible for the structure of bystolic drug was 10 sterioisomers
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why are group VIA elements called halogens??
Answer:
Group VII are called halogens because react with metals to form salts
what is the anion of cobalt III sulfide
chemical formula:
Co2S3
The only ion that is seen to be a negative ion in cobalt III sulfide is the sulfide ion.
What is an anion?The term anion just means a negative ion. We know that when we have an ionic compound, the ionic compound would have a positive ion which would have a plus sign and a negative ion which would have a minus sign.
We have to look at the compound that is called cobalt sulfide. there are two ions here, the cobalt III ion and the sulfide ion. The cobalt III ion is positive while the sulfide ion is negative.
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What are both names for the compound HNO₂?
(In the spaces provided, write out the complete names of the compound requested)
The name of this compound when not dissolved is type your answer...
The name of this compound when dissolved in type your answer…
Answer:
Explanation:nitrous acid
calculate the mass of 45.0 L of Cl2 at 87.0°C and 950. mm Hg.
use the ideal gas law formula and here are values for R:
8.134 (L * kPa)/(mol * K)
0.0821 (atm * L)/(mol * K)
62.364 (L * mmHg)/(mol * K)
include the following with your answer:
Which Gas Law constant did you use or which “R” value did you use? Why?
The numerical answer to the question.
An explanation of the correct number of significant figures you will use for the numerical answer.
The mass of 45.0 L of at 87.0° C and 950 mm Hg is therefore 72.181 g, we can deduce.
What is the theory of the ideal gas law?The macroscopic characteristics of ideal gases are related by the ideal gas law (PV = nRT). A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume).
Briefing:Volume = 45.0 L
Temperature =87 = (87.0 + 273) K = 360 K
Pressure = 950 mm Hg (1 mm Hg = 0.00131579 atm) = 1.25 at
The following formula is used to calculate moles.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
As shown, enter the values into the formula above.
PV = nRT
1.25 atm* 45.0 L = n * 0.0821 L atm /mol K * 360 K
n = 1.25 atm* 45.0 L / 0.0821 L atm /mol K * 360 K
n = 56.25 / 29.556
n = 1.90 mol
The mass of a substance divided by its molar mass is expressed in moles. The following formula is used to compute the mass of (molar mass = 37.99 g/mol).
Moles = mass / molar mass
1.90 mol = mass/37.99 g/mol
Mass = 72.181 g
The mass of 45.0 L of at 87.0° C and 950 mm Hg is therefore 72.181 g, we can deduce.
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sodium hydroxide (naoh) is a notably common strong base. it is used in household cleaning, drain clearing, tissue digestion, chemical pulping, and german pretzel production (which thankfully uses food grade sodium hydroxide, which is rare.) a. to prepare a solution for an important reaction, a scientist places 40 g of naoh in 2 l of water. what is the poh of this solution? what is the ph of this solution?
The pOH of this solution is 0.3 and the pH of the solution is 13.3 .
What is pH ?
The pH of a food is a direct function of the free hydrogen ions present in that food. Acids in food release free hydrogen ions. Hydrogen ions give acidic foods their characteristic sour taste. Therefore, pH can be defined as a measure of free acid. More specifically, pH is defined as the negative logarithm of hydrogen ion concentration. The pH range is 0 to 14. The pH of pure water is exactly 7, so pH 7 is neutral. Values less than 7 are acidic. Values above 7 are basic or basic.
Foods are generally classified as “acidic foods” (low pH, pH 4.6 or less) or “weakly acidic foods” (high pH, pH 4.6 or higher). Safe food storage is determined by the pH of the food. Acidic foods such as fruit and pickles can be safely canned in a tin can with a hot water bath. A combination of acid and hot water (212°F) destroys perishable organisms such as mold and yeast. Proper cooking water canning processes are important to prevent the growth of acid-tolerant molds and yeasts that can lead to elevated pH levels. The pH of borderline foods such as figs and tomatoes can easily exceed 4.6, so lemon juice or citric acid should be added before canning with boiling water. Low-acid foods such as vegetables and meat should be processed in a pressure preserver for safety.
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if a phosphoric acid solution has a ph of 2.42, what can you tell about the relative concentrations of phosphoric acid and dihydrogen phosphate? the pka for each step in the dissociation of phosphoric acid is given.
2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]
The first dissociation of phosphoric acid involves the species phosphoric acid, H2 PO4, and dihydrogen phosphate, H2 PO. The formula for the acid dissociation constant is: Ka, =2.42
the logarithm of the log On both sides of the mentioned equation, ka1 =
Pн = PKA + log [H, PO4)
Using definitions
[H3PO4] The renderson equation mentioned above will be utilized to determine the relative concentrations. log PH - Pka, 2.42; [H2 PO] =0.3
I log x = 2 = 109
Thus, X= 2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]
Dihydrogen phosphate is present at higher concentrations than phosphoric acid.
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What is the solubility of strontium iodate, Sr(IO3)2, in water? The Ksp for Sr(IO3)2 is 1.14x 10-7.Sr(IO3)2(s) Sr2+(aq) + 2IO3- (aq)
The solubility of the strontium iodate is 3.1 * 10^-3 M.
What is solubility?The term solubility has to do with the amount of a solid that is dissolved in water. We know that there are some substances that are able to dissolve better in water than others.
We now have to find the solubility of the strontium iodate from the following;
Ksp = [x] [2x]^2
Ksp = 4x^3
The solubility of the substance is x.
x= ∛Ksp/4
x =∛ 1.14 x 10^-7/4
x = 3.1 * 10^-3 M
The solubility of the solid is obtained as 3.1 * 10^-3 M.
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if you close a pressure cooker with the contents at 280k and 1 atm, what is the pressure when the contents are heated up to 406k ?
The new pressure will be 1.45atm.
Ideal gas equation gave a relation between pressure, temperature and volume. It can be expressed as:
PV=nRT
Where, P is pressure, V is volume and T is temperature
The given data:
[tex]T_{1}[/tex] = 280K
[tex]T_{2}[/tex]= 406K
[tex]P_{1}[/tex] = 1 atm
[tex]P_{2}[/tex] = ?
The amount of unknown pressure can be determined by using the formula:
P1/T1=P2/T2....(i)
Now, put the values of given data in above equation.
P2= P1T2/T1
P2=1×406K / 280
P2 = 1.45atm
Therefore, the new pressure will be 1.45atm
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When 0.4g of zinc trioxocarbonate (IV) reacted with dilute hydrochloric acid, zin chloride was produced and carbon (IV) oxide evolved if the reaction took 2minutes. What was the rate of the reaction
The rate of reaction when 0.4g of zinc trioxocarbonate (iv) reacted with dilute hydrochloric acid to produce zinc chloride and carbon (iv) in 2 minutes is 0.0016 mol/min.
What is the rate of a reaction?The rate of a reaction is the time taken for product molecules to appear or the time taken for reactant molecules to be converted.
Rate of reaction = moles of products formed/ time takenOr
Rate of reaction = moles of reactant converted / time takenThe equation of the reaction is given below:
ZnCO₃ (s) + 2 HCl (aq) ---> ZnCl₂ (aq) + H₂O (l) + CO₂ (g)
Molar mass of zinc carbonate = 125.39=8 g/mol
Moles of zinc carbonate converted = 0.4 / 125.38
Moles of zinc carbonate converted = 0.0032 moles
Time taken = 2 minutes
Rate of reaction = 0.0032/ 2
Rate of reaction = 0.0016 mol/min
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When a chlorine atom reacts weith a sodium atom to form an ion, the chlorine atom will
Select one:
a.
gain one electron
b.
gain two electons
c.
lose two electrons
d.
lose one electon
Answer:
a) gain one electron
Explanation:
When the chlorine atom reacts with the sodium atom, it creates NaCl. Sodium would be your cation and chlorine would be your anion. A sodium atom (Na) has a 1+ charge while the chlorine atom (Cl) has a 1- charge. As a result, sodium would lose a valence electron causing chlorine to gain a electron.
consider the molecule cis-1,2-dibromocyclopentane. which of the following types of isomers does this molecule have?
The molecule cis-1,2-dibromocyclopentane comes under Stereoisomers.
Stereoisomers are molecules that have the same molecular formula, the same atom connectivity, but they differ in the relative spatial orientation of the atoms.
In cis-1,2-dibromocyclopentane, both bromine atoms are on the same "face" of the cyclopentane ring.
suppose that an atom has (i) 4, (ii) 5, electrons in different orbitals. what are the possible values of the total spin quantum number s? what is the multiplicity in each case?
The spin quantum number will be 2 and 2.5 and multiplicity in each case will be 5 and 6.
The angular momentum of such an electron is described by its spin quantum number (ms). An electron carries orbital angular momentum in addition to angular momentum around its axis of rotation. The Spin Quantum Number (s) really does have a magnitude (1/2) and a direction (+ or -) since angular momentum would be a vector.
(i) If an atom has 4 electrons then it will have total
Total spin quantum number = 1/2+1/2+1/2+1/2 = 4/2=2
Multiplicity = 2S+1= 2×2+1=5
(ii) If an atom has 5 electrons then it will have
Total spin quantum number = 1/2+1/2+1/2+1/2+1/2 = 5/2 = 2.5
Multiplicity = 2S+1= 2×2.5+1=6
Therefore, the spin quantum number will be 2 and 2.5
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Why would a thermometer be considered a speedometer for atoms? Explain with at least 2 sentences.
Apply to a gas molecule's kinetic energy is not the same as telling you the speed, so calling a thermometer a speedometer for atoms is deceptive.
Why would a thermometer be considered a speedometer for atoms?Uniformly, if a sample of water is put down in the freezer, its molecules begin to move slower (with a lower speed) and this is thought the back by a lower thermometer reading. It is in this feeling that a thermometer can be thought of as a speedometer. As John Rennie broaches in the comments, thermometers work for solids, liquids, and gasses, whereas the temperature is comparable to the average. A thermometer would be an average speedometer for the primary molecules of a substance or structure, not specifically separate atoms.
So we can conclude that thermometers compute the average velocity of atoms in a given material or order volume.
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what are the products for the balanced reaction of hydrochloric acid (hcl) and magnesium hydroxide (mg(oh)2)
The products for the balanced reaction of hydrochloric acid (HCL) and magnesium hydroxide (mg(oh)2) are salt (magnesium chloride ) and water.
The balanced equation is:
[tex]Mg(OH) _{2}+2HCl - MgCl_{2}+2H_{2} O[/tex]
What happens when magnesium hydroxide reacts with HCl?
The reaction between magnesium hydroxide and hydrochloric acid is an example of a neutralization reaction. The hydroxide and hydrogen ions will combine to form water. The remaining ions combine to produce the salt of neutralization. The salt is magnesium chloride.Does magnesium hydroxide dissolve in HCl?
Magnesium Hydroxide is soluble in dilute hydrochloric acid.
Thus, products obtained from the reaction are salt and water.
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suppose you mix 100.0 g of water at 23.2 oc with 75.0 g of water at 71.9 oc. what will be the final temperature of the mixed water, in oc?
The final temperature of the mixed water is 17.43°C.
Principle of Calorimeter:
The body at a higher temperature releases heat while the body at a lower temperature absorbs heat. The principle of calorimetry indicates the law of conservation energy, i.e. the total heat lost by the hot body is equal to the total heat gained by the cold body.
From the calorimeter principle we have:
heat loss by hot water = Heat gained by the cold water
The formula for the heat gained or loss:
Q = m.c.ΔT
Q = heat gained or loss
c = specific heat
ΔT = temperature change
m1 = 100g
m2 = 75g
m2c ΔФ2 = m1c ΔФ1
75 × (71.6-T) = 100× ( T - 23.2)
5370 - 75T = 100T - 2320
175 T = 3050
T = 17.43°C
Therefore the final temperature is 17.43°C
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Which of the following ions is a polyatomic ion?
OP³-
OOH
0²-
Mg
Polyatomic ion is OOH
Polyatomic ion are ion which consist of more than one atom and atom in a polyatomic ion are usually covalently bonded to one another and therefore stay together as a single or charged unit and here OOH there are two oxygen atom and one hydrogen atom that's it is polyatomic ion
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