The physical property possessed by the matter that can depend on the pull of gravity is weight. Hence, option C is correct.
What is gravity?Gravity can be given as the force exerted by a body, in order to attract it towards itself. In other words, it can be given as the pulling force exerted by a body.
The gravitational force of the earth was given by Issacs Newton, which describes the earth as a gravitational force that allows matter over the surface of the earth.
The object that occupies space, and comprises of a measurable amount of mass has been a matter. The mass of the matter has been the absolute measure of the atoms, while the weight of the matter has been the mass of the matter experienced after the pull of gravity.
Therefore, the property of matter that has been dependent on the pull of gravity is weight. Hence, option C is correct.
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Which type of bond shows two or more atoms sharing electrons?
Metallic
Covalent
Tonic
Equal
Need ASAP!
Answer:
Covalent is the type of bond.
Answer:
Covalent
Explanation:
Took the test and got it right :)
To make a 4.00 M solution, how many moles of solute will be needed if 12.0 liters of solution are required?
A: 6 mol
B: 12 mol
C: 48 mol
D: 120 mol
Answer:
C
Explanation:
Molarity=number of moles/volume
Hence:
Moles required=Molarity×volume
=4mol/L×12L=48moles
Hint:As L(litre will cancel out))
Answer is C
The required moles of solute will be "48 mol".
Molar solutionAn aqueous solution containing one mole of something like a chemical dissolved throughout one liter of water or liquid is considered a Molar solution.
According to the question,
Molarity = 4 M
Volume = 12 L
We know the formula,
→ Molarity = [tex]\frac{Number \ of \ moles}{Volume}[/tex]
or,
→ Moles required = Molarity × Volume
By substituting the values, we het
= 4 × 12
= 48 moles
Thus the correct answer be "Option C" i.e., 48 mol.
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In the picture, the different shapes (circle, triangle, and a square) represent different elements. Which of the following represents a pure substance?
A) Figure W&X
B)Figure W&Y
C) figure Z&Y
D) figure Z&W
Answer:
A
Explanation:
In your own words, explain if you agree or disagree with this statement: "Nuclear energy is the cleanest
and safest energy source we have available." Explain your choice by including at least 3 supporting
details.
Answer:
nuclear energy is the cleanest and safest energy source we have available and i agree with this statement for following reasons:
1. Nuclear power is generated by a controlled chain reaction involving the splitting of atoms. A modern nuclear power plant uses the intense heat created by this reaction to heat water and create steam, which turns a turbine and generates electricity. Whereas a coal-fired plant heats water by burning coal, a nuclear plant heats it by splitting atoms. This process is called nuclear fission.
2. Nuclear fission, in simple terms, occurs when an atom splits in two, releasing a massive amount of energy and several subatomic particles called neutrons. These neutrons, in turn, hit and split other atoms, beginning and sustaining the chain reaction. Reactor operators control this reaction in a variety of ways and thus regulate the amount of heat generated and energy produced.
3. The raw fuel for this process is the metal uranium, which must be enriched before it can be used for producing energy in commercial reactors. Enrichment is necessary because mined uranium ore is around 99.3 percent uranium-238, which, in today’s commercial power plants, does not readily split upon exposure to neutrons from the fission chain reaction, and thus makes poor fuel. The other 0.7 percent of mined uranium is uranium-235, which makes excellent fuel. The number refers to the atomic mass, or the total mass of protons and neutrons that make up the atomic nucleus. This difference in mass of the same element makes them two different isotopes of uranium. The enrichment process consists essentially of increasing the percentage of uranium-235 by decreasing the percentage (via removal) of uranium-238.
i hope you find your answer..Which of the following correctly represents 148 million kilometers in scientific notation?
Group of answer choices
1.48 × 10 8
1.48 × 10 5
1.48 × 10 7
1.48 × 10 6
In the following reaction, H3PO4 (aq) + H2O (l) ⇄ H2PO4– (aq) + H3O+ (aq) what happens when more H2PO4– (aq) is added to the solution?
Answer:
The concentration of H₃PO₄ will increase.
Explanation:
H₃PO₄(aq) + H₂O(l) ⇄ H₂PO₄⁻(aq) + H₃O⁺(aq)
According to Le Châtelier's Principle, when we apply a stress to a system at equilibrium, the system will respond in a way that tends to relieve the stress.
If we add more H₂PO₄⁻, the position of equilibrium will move to the left to get rid of the added H₂PO₄⁻.
The concentration of H₃PO₄ will increase.
At 17.0 degrees Celsius, a 0.800 mole sample of a gas exerts a pressure of 1.20 atmospheres.
What is the volume of the container? *
Answer:
The volume in the container is 15.86 L
Explanation:
Step 1: Data given
Temperature = 17.0 °C = 290 K
Number of moles = 0.800 moles
Pressure = 1.20 atm
Step 2: Calculate the volume of the container
p*V = n*R*T
⇒with p = the pressure of the gas = 1.20 atm
⇒with V of the container = TO BE DETERMINED
⇒with n = the number of moles = 0.800 moles
⇒with R = the gas constant = 0.08206 L*Atm/mol*K
⇒with T = the temperatur = 17.0 °C = 290 K
V = (n*R*T)/p
V = (0.800 moles * 0.08206L*atm/mol*K * 290 K) / 1.20 atm
V = 15.86 L
The volume in the container is 15.86 L
The population of the Earth at the end of 2018 was approximately 7.7 × 10 9 people. Which of the following is the correct way of representing this number?
Answer:
7700000000
Explanation:
so 7.7 x 10 to the power of 9 is in standard form
to put it into a number you just need to times it by 1000000000
however your answer will only have 8 zeros because of the decimal point
In water, compounds that releases __________ ions are known as _________
Answer:
hydrogen,Acids
Explanation:
Hope this helps you
How many joules are required to raise the temperature of a 6.50 g sample of silver from 34°c to 189°C? The specific heat of gold is 0.235j/g°c
Answer:
236.76 J
Explanation:
Parameters given:
Mass of sample, m = 6.50 g
Initial temperature, [tex]T_1 = 34^o C[/tex]
Final temperature, [tex]T_2 = 189^oC[/tex]
Specific heat capacity of gold, [tex]c = 0.235 J/g^oC[/tex]
Heat of a substance is related to specific heat capacity by the formula:
[tex]H = mc(T_2 - T_1)[/tex]
[tex]H = 6.5 * 0.235 * (189 - 34)\\\\\\H = 6.5 * 0.235 * 155\\\\\\H = 236.76 J[/tex]
236.76 J of heat is required to raise the temperature of the sample.
The quantity of heat, in Joules, required to raise the temperature is 236.76 J
HeatFrom the question we are to determine quantity of heat required
Using the formula
Q = mcΔT
Where Q is the quantity of heat
m is the mass of substance
c is the specific heat capacity
and ΔT is the change in temperature
From the given information,
m = 6.50 g
c = 0.235 J/g °C
ΔT = 189 °C - 34 °C = 155 °C
Putting the parameters into the formula, we get
Q = 6.50 × 0.235 × 155
Q = 236.76 J
Hence, the quantity of heat, in Joules, required to raise the temperature is 236.76 J
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You have 34.1 x 1023 molecules of O2. How many moles of O2 do you have? Fill in the grid. Then, solve the problem and answer the question. Remember to include units!
Number of moles = 5.7 moles of oxygen.
Explanation:
We have to convert number of molecules into number of moles by dividing the number of molecules by Avogadro's number.
Here number of molecules of oxygen given is 34.1 × 10²³ molecules.
Now we have to divide the number of molecules by Avogadro's number as,
Number of moles = [tex]$\frac{number of molecules}{Avogadro's number}[/tex]
= [tex]$\frac{34.1}{6.022} \times \frac{10^{23} }{10^{23} }[/tex]
= 5.7 moles
So here molecules is converted into moles.
Identify the type of reaction
Na2SO4 + 2AgNO3 → Ag2SO4 + 2NaNO3
A student synthesized a cobalt amine complex with 11.0323 g of CoCl2·6H2O (limiting reactant, MW = 237.83 g/mol) and collected 9.4705 g of the cobalt amine complex (MW = 250.45 g/mol). What was the percent yield?
Answer:
The percent yield would be 81.51%
Explanation:
Number of moles of CoCl2·6H2O would be calculated by using the formula
number of moles = given weight/molecular weight.
Thus, by putting values,
= 11.0323/237.83
= 0.046387
Number of moles of CO+2 = Number of moles of CoCl2·6H2O = 0.046387
As we know that CoCl2·6H2O is a limiting reactant, therefore, the number of moles of complex = Number of moles of CO+2 = 0.046387.
Hence, we can calculate the mass of the complex as follows:
Molecular weigth x number of moles = 250.45 x 0.046387
Thus, the theoratical yield would be 11.6176.
We know that actual yield as given in statement is 9.4705 g. Therefore, percent yield would be,
= (9.4705 / 11.6176) x 100
= 81.51%
The process of hydrogen bonding involves hydrogen atoms bonding with blank
A. Either oxygen, carbon, or silicon
B. Either nitrogen, Boron, or hydrogen
C. Either fluorine, oxygen, it nitrogen
D. Either fluorine, hydrogen, or sodium
A 0.120 gram sample of Zn reacts with an excess of hydrochloric acid and produces 46.5 mL of H2 gas which is collected over water at a barometric pressure of 748 mm Hg and at 23° C. The vapor pressure of water at 23° C is 21 mm Hg. What is the molar mass of Zn?
To determine the molar mass of Zn, we first calculated the moles of H2 gas using the ideal gas law with corrected gas pressure, and then used this to find the moles of Zn which was equal to the moles of H2. By dividing the mass of Zn by the moles of Zn, we found the molar mass to be 66.7 g/mol.
To calculate the molar mass of Zn, using the data provided, we first have to use the ideal gas law to find the number of moles of H2 gas produced. The barometric pressure is given as 748 mm Hg, from which we need to subtract the vapor pressure of water at 23°C (21 mm Hg) to find the actual pressure of the hydrogen gas.
The corrected gas pressure is, therefore, 748 mm Hg - 21 mm Hg = 727 mm Hg. Converting this to atmospheres (atm): 727 mm Hg * (1 atm / 760 mm Hg) = 0.957 atm. Given that the volume of the gas is 46.5 mL (which we convert to liters: 46.5 mL * (1 L / 1000 mL) = 0.0465 L) and temperature is 23°C (which we convert to Kelvin: 23 + 273 = 296 K), we can use the ideal gas law (PV = nRT) to calculate the number of moles of hydrogen gas (n).
Calculate moles of H2:
PV = nRT
n = PV / RT
n = (0.957 atm * 0.0465 L) / (0.0821 L atm mol-1 K-1 * 296 K)
n = 0.00180 moles of H2
Since one mole of Zn produces one mole of H2, the moles of Zn reacted is also 0.00180. The molar mass (M) of Zn can now be calculated by dividing the mass of the Zn by the moles of Zn consumed.
Calculate molar mass of Zn:
M = mass / moles
M = 0.120 g / 0.00180 mol
M = 66.7 g/mol
The answer is: 65.22. The molar mass of Zn is approximately 65.22 g/mol.
1. Calculate the pressure of the dry hydrogen gas by subtracting the vapor pressure of water from the total pressure. The total pressure is given as 748 mm Hg, and the vapor pressure of water at 23°C is 21 mm Hg.
Dry H₂ gas pressure = Total pressure - Vapor pressure of water
Dry H₂ gas pressure = 748 mm Hg - 21 mm Hg
Dry H₂ gas pressure = 727 mm Hg
2. Convert the pressure of the dry hydrogen gas from mm Hg to atmospheres (atm).
1 atm = 760 mm Hg
Dry H₂ gas pressure in atm = 727 mm Hg - (1 atm / 760 mm Hg)
Dry H₂ gas pressure in atm = 0.9566 atm
3. Convert the temperature from degrees Celsius to Kelvin (K).
T(K) = T(°C) + 273.15
T(K) = 23°C + 273.15
T(K) = 296.15 K
4. Use the Ideal Gas Law to calculate the number of moles of hydrogen gas produced. The Ideal Gas Law is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.
Rearrange the Ideal Gas Law to solve for n (number of moles of H₂):
n = PV / RT
We need to convert the volume of H2 gas from mL to L:
1 L = 1000 mL
V = 46.5 mL = 0.0465 L
Now, plug in the values:
n = (0.9566 atm)(0.0465 L) / (0.0821 L·atm/mol·K)(296.15 K)
n = 0.00184 mol
5. According to the balanced chemical equation for the reaction of zinc with hydrochloric acid, the reaction is:
Zn(s) + 2HCl(aq) -- ZnCl₂(aq) + H2(g)
From the stoichiometry of the reaction, 1 mole of Zn produces 1 mole of H₂ gas. Therefore, the moles of Zn reacted is equal to the moles of H₂ gas produced.
Moles of Zn = Moles of H₂
Moles of Zn = 0.00184 mol
6. Finally, calculate the molar mass of Zn using the mass of the Zn sample and the moles of Zn reacted.
Molar mass of Zn = Mass of Zn sample / Moles of Zn
Molar mass of Zn = 0.120 g / 0.00184 mol
Molar mass of Zn = 65.22 g/mol
This value is close to the accepted molar mass of Zn, which is 65.38 g/mol, indicating that the calculation is consistent with the expected value.
Identify the main purpose of the Periodic Table. *
The periodic table is one of the most important tools in the history of chemistry. It describes the atomic properties of every known chemical element in a concise format, including the atomic number, atomic mass and relationships between the elements. Elements with similar chemical properties are arranged in columns in the periodic table.
The table thus is a quick reference as to what elements may behave the same chemically or which may have similar weights or atomic structures.
Hope this answer helps you
What is the molar solubility of zinc oxalate ( ZnC204) in water? The solubility-
product constant for ZnC04 is 2.7 x 10-8 at 25°C.
O
1.4 x 10-8
O 7.57
5.4 x 10-8
1.6 x 10-4
2.3 x 10-4
Question 12.11 noint)
Answer:
S = 1.6 E-4 M
Explanation:
ZnCO4 ↔ Zn2+ + CO42-S S S
∴ Ksp = 2.7 E-8 = [Zn2+]*[CO42-]
⇒ Ksp = (S)*(S) = S² = 2.7 E-8
⇒ S² = 2.7 E-8
⇒ S = √2.7 E-8
⇒ S = 1.6432 E-4 M ≅ 1.6 E-4 M
How does changing the temperature affect the chemical reaction?
A) Solubility of the solutes and the reaction rate are increased as the temperature of the reaction is decreased.
B) Lowering the temperature of the chemical reaction increases the concentration of the solute and the reaction rate.
C) Raising the temperature of the reaction increases the reaction rate by increasing the energy and frequency of collisions.
D) Concentration of the solute and pressure of the solution decreases as the temperature of the chemical reaction increases.
Answer:
C
Explanation:
Temperature is directly related to kinetic energy (KE). As we raise temperature, we are raising KE, as well. Particles with more KE move more quickly and with more force.
This means that these particles are more likely to collide with each other and react to allow the chemical reaction to follow through. In turn, if the chemical reaction is more likely to go to completion, the reaction rate increases, eliminating A and B.
The concentration of the solute is not affected by the temperature; in other words, temperature will not increase or decrease the amount of solute in the solution, so eliminate D.
Thus the answer is C.
Hope this helps!
Final answer:
Raising the temperature of a chemical reaction generally increases the rate of reaction due to faster molecular movement, more collisions, and higher chances of overcoming the activation energy barrier. However, the solubility of gases in a solvent typically decreases with increased temperature.
Explanation:
Changing the temperature can significantly influence the rate of a chemical reaction. When you raise the temperature of a chemical reaction, you provide more kinetic energy to the reactants. This increased energy results in the molecules moving faster, leading to a higher frequency of collisions. More importantly, these collisions are more forceful, making it more likely for the reactants to overcome the activation energy barrier and form products. As such, the reaction rate increases with an increase in temperature.
It is important to note, however, that the effect of temperature on solubility can vary depending on the nature of the solute. For example, the solubility of gases such as HCl, NH₃, and SO₂ in a solvent actually decreases with an increase in temperature. This is because a higher temperature gives the gaseous solute molecules more kinetic energy, increasing their tendency to escape the solvent and return to the gas phase.
In summary, among the given options, C) accurately describes the effect of temperature on chemical reactions: Raising the temperature of the reaction increases the reaction rate by increasing the energy and frequency of collisions.
0710
A missile is flying at a speed of 125 m/s. If the missile has a
mass of 125 kg, what's its kinetic energy? Keep 4 significant
figures.
Answer:976,600
Explanation:
I had the exact same question and I got it right.
Answer:
976,563
Explanation:
this is the true answer
A 1300 mL sample of gas with a molar mass of 71.0 g/mol at STP has what density?
Answer:
0.055g/mL
Explanation:
Data obtained from the question include:
Molar Mass of the gass sample = 71g/mol
Volume of the gas sample = 1300 mL
Density =?
The density of a substance is simply mass per unit volume. It is represented mathematically as:
Density = Mass /volume.
With the above equation, we can easily obtain the density of sample of gas as illustrated below:
Density = 71g / 1300 mL
Density = 0.055g/mL
Therefore, the density of the gas sample is 0.055g/mL
Select the reasons why organisms are classified. Check all that apply.
to name them
to determine their lifespan
to form groups
to allow identification
to show relatedness
to identify their habitats
Answer:
ACDE
Explanation:
just answered this question on edg
Answer: A C D and E
Explanation: I just did it.
On her way to school Tuesday morning, Ana got soaking wet during a surprise rainstorm. She was not carrying an umbrella or rain jacket because the climate in her town was normally very hot and dry. What are the main factors that influence the amount of precipitation in an area or region?
Answer:
Prevailing winds
Presence of mountains
Seasonal winds.
Explanation:
Prevailing winds:
Prevailing winds is the wind that blows across an area or surface over time. It affects the amount of precipitation. If winds blows inland from water bodies such as oceans the amount do precipitation will be high because they carry more water vapor than the winds that blow over land.
Presence of mountains :
Mountain ranges affect precipitation too.The windward side of the mountain, which is the side the wind hits has higher precipitation while the land on the other side of the mountain, leeward side, will have little precipitation.
Answer:
Prevailing winds
Presence of mountains
Seasonal winds.
Explanation:
Prevailing winds:
Explanation:
Prevailing winds is the wind that blows across an area or surface over time. It affects the amount of precipitation. If winds blows inland from water bodies such as oceans the amount do precipitation will be high because they carry more water vapor than the winds that blow over land.
Presence of mountains :
Mountain ranges affect precipitation too.The windward side of the mountain, which is the side the wind hits has higher precipitation while the land on the other side of the mountain, leeward side, will have little precipitation.
5.22x10-3 = [? ]x 10-2
Answer:490
Explanation: 5.22x10-3= 49.2 49.2x10-2=490
In the energy pyramid, if a primary producer is consumed by a first-level consumer, and that first-level consumer is consumed by a
second-level consumer and the second-level consumer is consumed by a third-level consumer, how much energy is stored by the
third-level consumer from the primary producer?
0.1%
4.09
109
40%
Answer:
0.1%
Explanation:
1. ____________ refers to the nonliving parts of an ecosystem. Biotic Abiotic 2. ___________ refers to the living parts of an ecosystem. Biotic Abiotic
3. Parasitic diseases and predator/prey relationships are all examples of __________ factors in an ecosystem. biotic abiotic
Answer:
1. Abiotic
2. Biotic
3. Biotic
Explanation:
Abiotic includes nonliving.
Biotic includes living.
Answer:
abiotic
biotic
abiotic
Explanation:
can someone help me create my own chemistry meme with this picture.. ( don’t copy and paste from internet please ) THANKS !
Answer:
When you remember salt is soduim chloride so you put it on everything to feel smart.
Explanation:
Sorry im bad at this : - /
a scuba diver's tank contains 0.29g of oxygen compressed into volume of 2.3L. What is the pressure in the tank at 9C?
To find the pressure in the scuba diver's tank, you can use the Ideal Gas Law. Convert the provided quantities into appropriate units (g to moles, °C to K, etc), then substitute into the Ideal Gas Law equation to solve for pressure.
Explanation:To calculate the pressure in the scuba diver's tank, it is necessary to apply the Ideal Gas Law, which states PV = nRT. Here, P is pressure, V is volume, n is moles of the gas, R is the ideal gas constant and T is temperature in Kelvin.
First, you need to convert all the given values into compatible units. 0.29 grams of Oxygen need to be converted to moles. We know that the molar mass of Oxygen is about 32 g/moles, hence, 0.29 g is approximately 0.00906 moles. The volume of 2.3L is appropriate as is, and the temperature needs to be converted from Celsius to Kelvin by adding 273.15 to the °C value. Thus, the temperature will be 9 + 273.15 = 282.15 K.
Substituting the found values and the ideal gas constant (which is about 0.0821 L·atm/(K·mol) in this case) in the equation P = nRT / V, we have:
P = (0.00906 moles * 0.0821 L·atm/(K·mol) * 282.15K) / 2.3L
By calculating the above expression, we can get the pressure in the diving tank.
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To find the pressure in the scuba tank, you can use the ideal gas law equation (PV=nRT). Convert the given temperature to Kelvin and the given mass of oxygen to moles. Plug the values into the equation to solve for the pressure, which is approximately 0.110 atm.
Explanation:To find the pressure in the scuba tank, we can use the ideal gas law equation, which is PV = nRT. In this equation, P represents the pressure, V represents the volume, n represents the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
We first need to convert the given temperature of 9°C to Kelvin. To do this, we add 273.15 to the Celsius temperature, giving us 9 + 273.15 = 282.15 K.
Next, we convert the given mass of oxygen (0.29g) to moles. Since the molar mass of oxygen (O₂) is 32 g/mol, we divide the mass by the molar mass: 0.29g / 32 g/mol = 0.009 mol.
Now we can plug the values into the ideal gas law equation and solve for the pressure:
PV = nRT
P * 2.3L = 0.009 mol * 0.0821 L·atm/mol·K * 282.15 K
P = (0.009 mol * 0.0821 L·atm/mol·K * 282.15 K) / 2.3L
P ≈ 0.110 atm
Therefore, the pressure in the scuba tank at 9°C is approximately 0.110 atm.
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If a liter of solution is needed, how many grams of ethanol, C2H6O will be added when a scientist creates a 0.25 molal solution?
Answer:
11.52g of ethanol
Explanation:
Molality is an unit of concentration defined as ratio between moles of solute (In this case, ethanol) and kg of solvent.
As solvent is water, 1 liter of water weights 1kg.
That means to create a 0.25molal solution it is necessary to have 0.25 moles of ethanol.
Molar weight of ethanol (C₂H₆O) is:
C: 12.01g/mol × 2 = 24.02g/mol
H: 1.01g/mol × 6 = 6.06g/mol
O: 16g/mol × 1 = 16g/mol
24.02g/mol + 6.06g/mol + 16g/mol = 46.08g/mol
As you need 0.25 moles, there is necessary to weight:
0.25 moles × (46.08g/mol) = 11.52g of ethanol
The Lewis dot model of a molecule is shown
Answer:
b. Each chlorine has three non-bonded pairs and one bonded pair of electrons.
Explanation:
Chlorine has three valance electrons. Each Cl atom forms a single covalent bond with the central P atom by sharing a pair of electrons. After forming a single covalent bond each Cl atom is left with six electrons that do not participate in any bond formation or there are three pairs of lone electrons.
Hope this helps :)
Answer:
Each chlorine has three non-bonded pairs and one bonded pair of electrons.
Explanation:
Which statement accurately compares ionic and covalent bonding?
Answer:
Ionic have high melting and boiling points while covalent has low melting and boiling points.
Compound with ionic bonding have high melting points as compared to the compounds with covalent bonding.
What is ionic bonding?
Ionic bonding or electrovalent bonding is a type of bonding which is formed between two elements when there is an exchange of electrons which takes place between the atoms resulting in the formation of ions.
When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge and forms an ion called the anion.
As the two atoms are oppositely charged they attract each other which results in the formation of a bonding called the ionic bonding.The compounds with ionic bonding have high melting points ,high density and are malleable and ductile as well.
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