There is 12.4g of silver chromate.
Almost all alkali metal compounds and nitrates are soluble, but most silver compounds are not. Therefore, when the soluble salts silver nitrate and sodium chromate are mixed, insoluble silver chromate is formed and precipitated. This method involves titrating the chloride ion concentration in a solution with silver nitrate. A silver chloride precipitate forms when the silver nitrate solution is slowly added.
The endpoint of the titration is when all chloride ions have precipitated. Silver chromate precipitates as a brick-red precipitate from aqueous solutions. This reaction is also called a precipitation reaction. A precipitate is an insoluble solid that forms when solutions are mixed. For precipitation titrations with silver nitrate, a suitable indicator indicates the end point of the titration by a color change when there is excess Ag+ in the solution.
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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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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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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.
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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A block and tackle is a rope and pulley system that uses multiple pulleys. It multiplies a small force into a large one. If a motor has a weight of about 2500 N and people pull 4.0 m of rope with a force of 700 N to raise the motor 1.0 m, how efficient is the block and tackle?
The efficiency of the machine is obtained as 89.3%.
What is a pulley?A pulley is one of the types of simple machine. We know that a simple machine has to do with anything that helps you to be able to do your work more efficiently.
We know that the efficiency has to do with how well the pulley is able to do work as we know. In this case we know that the efficiency is obtained from;
Work output/Work input * 100/1
Work output =2500 N * 1.0 m = 2500 J
Work in put = 700 N * 4 m= 2800 J
Efficiency = 2500 J/2800 * 100/1
= 89.3%
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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 ph of a buffer with 0.462 m acetic acid and 0.355 m acetate. the ka for acetic acid is: 1.8 x 10-5
A buffer with 0.462 m acetic acid and 0.355 m acetate has a pH of 4.6. The acetic acid ka value is 1.8 x 10-5.
Buffer solution: What is it?The pH of a buffer solution won't change when small amounts of an acid or an alkali are added.
Simply put, a buffer solution that is acidic has a pH that is lower than 7. Acidic buffer solutions are normally made using a weak acid and one of its salts, frequently a sodium salt.
Alkaline buffer solution has pH higher than 7. The most common method for producing alkaline buffer solutions is to combine a weak base with one of its salts.
pH = -logKa + log([C₂H₃O₂⁻] / [HC₂H₃O₂])
ph = -log(1.8 × 10⁻⁵) + log(0.355 M / 0.462 M)
ph = 4.6
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Does alcohol really burn off when cooking? what are the possible substitutions for alcohol in recipes?.
Answer:Does alcohol really burn off when cooking? what are the possible substitutions for alcohol in recipes?
Explanation:
The longer you cook, the more alcohol cooks out, but you have to cook food for about 3 hours to fully erase all traces of alcohol. A study from the U.S. Department of Agriculture's Nutrient Data lab confirmed this and added that food baked or simmered in alcohol for 15 minutes still retains 40 percent of the alcohol.
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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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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the pressure of a sample of argon gas was increased from 3.34 atm to 8.18 atm at constant temperature. if the final volume of the argon sample was 14.8 l, what was the initial volume of the argon sample? assume ideal behavior.
The initial volume of the argon gas sample at a constant temperature is 36.24 L.
Let the initial pressure and initial volume be P and V respectively
And the final pressure and volume be P' and V' respectively
At constant temperature, for the given sample,
P = 3.34 atm
V = ?
P' = 8.18 atm
V' = 14.8 L
The ideal gas law is PV = nRT,
At constant T (temperature), PV = constant
According to Boyle's law, the product of the pressure and volume of an ideal gas at constant temperature is constant.
For ideal gas argon at a constant temperature, using Boyle's law we get
P * V = P' * V'
3.34 * V = 8.18 * 14.8
V = 121.06 / 3.34
∴ V = 36.24 L
Thus at 3.34 atm and constant temperature, the volume of a sample of agon gas is 36.24 L
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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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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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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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3. a student required 0.40 ml more naoh than she calculated she would need in question 1. explain how this might happen.
A student required 0.40 ml more NaOH than because it will use unstable indicator.
Chemical indicator, any substance which indicates visibly the existence or disappearance of a threshold concentration of such a chemical species, for instance an acid or a caustic in a solution, typically through a color change. One such chemical is methyl yellow, which gives an alkaline liquid a yellow color.
Indicators were weak acids as well as bases which exhibit a colour change when hydrogen ion quantity in a solution varies or as a solution's pH changes. In the water, the indicators gently separate to produce ions. Indicators include things like Litmus, turmeric, phenolphthalein, etc.
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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 can you say to the movie san andreas you've watch?
It appears that your answer contains either a link or inappropriate words. Please correct and submit again!
This is what it keeps saying when I want to answer so I have commented my answer below:
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.
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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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 group in the periodic table contains elements with the valence electron configuration of ns2np1?
group j neptunium Atomic number 93
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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Which property would cesium most likely have?
It is hard.
It is ductile.
It is a gas.
It has low reactivity.
Answer:
It is ductile.
Explanation:
Cesium belongs to group 1 on the periodic table, meaning it is an alkali metal, not a gas. Alkali metals are soft, malleable, and ductile. They are good conductors of heat and highly reactive in nature, meaning cesium is also highly reactive. Therefore, the only option that would make sense is "It is ductile."
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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24. what is the relationship between the number of bonds between two atoms and bond strength? bond length?
The strength of the bond describes how closely each atom is connected to another atom and how much energy is required to break that connection. The bond length is the average distance between the two atomic nuclei of two molecules that are joined together.
Define bond strength:The strength of the bond indicates how strongly each atom is bound to another and how much energy is expended in doing so. The force that a chemical bond utilizes to hold two atoms together is known as bond strength. The amount of energy required to break the bond is expressed in terms of the kilocalories per mole.
Define bond length:The equilibrium separation between the nuclei of two bound atoms in a molecule is referred to as the bond length. The bond length increases with increasing atom size. Bond multiplicity cause decrease in bond length. Rotational spectroscopy, X-ray diffraction, and other methods are used to measure it.
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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
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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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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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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Which atom’s ionization energy is greater than that of phosphorus (P)?
A) Ba
B) K
C) As
D) Cl
D.) CI
Explanation:Hi and Bye, have a good one. '^'