The mass of NaCl is 58.5 g
What is the mole?The mole is a fundamental unit of measurement used in chemistry to express the amount of a substance. One mole of a substance is defined as the amount of that substance that contains the same number of entities, such as atoms, molecules, or ions, as there are in 12 grams of carbon-12. This number is known as Avogadro's number and is approximately 6.02 x 10^23.
Number of moles of NaOH = 40 g/40 g/mol = 1 mole
Since the reaction is 1:1
Mass of NaCl formed = 1 moles * 58.5 g/mol = 58.5 g
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Consider a group of 5 students, each of whom makes a potassium chloride (74.55 mol/g) solution in the lab. Individually, each student weighs out an amount of sodium chloride and a volume of water, according to the following table. Use this information to calculate the solution concentration (in moles/liter) each student makes, the average concentration, and the standard deviation for the concentration.
fill out the chart pls
Normal Concentration = 18.09 moles/L Standard Deviation = 1.89 moles/L
What is Concentration?The capacity for sustained attention on a single thing, activity, or work without being sidetracked is known as concentration. It is the key to success in most endeavors, as it requires a person to ignore any extraneous thoughts, feelings, or stimuli and instead focus on the task at hand. Concentration is a mental skill that can be developed and improved with practice, such as with mindfulness, meditation, and various cognitive exercises. Concentration can also be adversely affected by poor physical health, lack of sleep, and stress, so it is important to maintain a healthy lifestyle if one wants to stay focused.
Student | Weight (g) | Volume (L) | Concentration (moles/L)
1 | 5.0 | 0.25 | 19.82
2 | 8.0 | 0.50 | 15.89
3 | 4.0 | 0.20 | 20.23
4 | 7.0 | 0.30 | 18.52
5 | 6.0 | 0.40 | 16.96
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Balance this equation: CS^2 + O^2 ---> CO^2 + SO^2
Balanced equation = CS₂ + O₂ = 2CO₂ + SO₂ . The reaction's mass and charge are in balance on both sides.
What is a reaction to balance?An equation for a chemical reaction that has the same total charge and number of atoms for both the reactants and the products is called a balanced equation. To put it another way, the reaction's mass and charge are in balance on both sides.
A balanced chemical equation is one in which the mass of the reactants and the mass of the products are both equal to the number of atoms of each element on both sides of the equation.
Why do we balance equations?To comply with the law of conservation of mass, which states that "Total mass of all the products of the reaction in a chemical reaction is equal to the total mass of all the reactants," the chemical equation must be balanced.
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help i dont understand how to answer the question
Pressure is independent variable and volume is dependent variable. During the investigation, the temperature and quantity of gas are kept constant.
What is Boyle's law?Boyle's law, also known as the Boyle-Mariotte law or Mariotte's law, seems to be an observational gas law that specifies the connection between confined gas pressure and volume.
If the temperature as well as quantity of gas stay constant within a closed system, the absolute pressure applied by a constant amount of an ideal gas seems to be inversely correlated with the volume it fills. Pressure is independent variable and volume is dependent variable.
Therefore, pressure is independent variable and volume is dependent variable. During the investigation, the temperature and quantity of gas are kept constant.
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Another student points out that Jasmine’s calculation relates only to the water. The student wonders if it is possible to determine the amount of energy in the sample of Cheetos.
Explain why you can answer part (A), even though the calculation in Question 4 related only to the water. In your explanation, refer to evidence from the experiment and appropriate chemical laws.
In Question 4, Jasmine calculated the amount of energy absorbed by the water when the burning Cheeto was placed in it. Although the calculation related only to the water, we can still determine the amount of energy released by the burning Cheeto. This is because of the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transferred or transformed from one form to another. In this case, the energy released by the burning Cheeto is transferred to the water, causing its temperature to increase.
Therefore, we can use the amount of energy absorbed by the water (calculated in Question 4) as a measure of the amount of energy released by the burning Cheeto. We can assume that the energy released by the Cheeto is equal to the energy absorbed by the water. This is known as the principle of calorimetry, which states that the heat lost by the object being studied is equal to the heat gained by the surrounding medium.
However, it is important to note that this assumption is only valid if all the energy released by the Cheeto is transferred to the water. In reality, some energy may be lost to the surroundings, such as through radiation or conduction. Therefore, the calculated value for the energy released by the Cheeto may be slightly lower than the actual value.
islare a component of food that your body requires large amounts of to support your survival.
If Jake have type 1 diabetes then he needs insulin cells because his body cannot make insulin protein.
What is diabetes?
Diabetes is a chronic, metabolic disease characterized by elevated levels of blood glucose (or blood sugar), which leads over time to serious damage to the heart, blood vessels, eyes, kidneys and nerves.
The most common diabetes symptoms experienced by many people with diabetes are increased thirst, increased urination, feeling tired and losing weight. In Type 1 diabetes, body cannot make insulin whereas in type 2 diabetes, body can make insulin but can't use it properly.
Therefore, if Jake have type 1 diabetes then he needs insulin cells because his body cannot make insulin protein.
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Tell of two tests you could use to determine is a mixture is a solution or a mechanical mixture
One way to determine whether a mixture is a solution or a mechanical mixture is to perform a filtration test. Another way to determine whether a mixture is a solution or a mechanical mixture is to perform a visual inspection test.
Explain about the above two tests in detail?
One way to determine whether a mixture is a solution or a mechanical mixture is to perform a filtration test. In this test, the mixture is passed through a filter paper, and if the filter paper traps solid particles, it indicates that the mixture is a mechanical mixture. On the other hand, if the mixture passes through the filter paper without leaving any solid particles, it suggests that the mixture is a solution.
Another way to determine whether a mixture is a solution or a mechanical mixture is to perform a visual inspection test. In this test, the mixture is observed under a microscope, and if the particles in the mixture are evenly distributed and do not settle over time, it indicates that the mixture is a solution. In contrast, if the particles in the mixture are not evenly distributed, and they settle over time, it suggests that the mixture is a mechanical mixture.
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Sodium will react with chlorine to form sodium chloride (NaCl). Another cation, magnesium, will also react with chlorine to form magnesium chloride.
Answer:
See explanation below
Explanation:
Sodium will react with chlorine to form sodium chloride NaCl.
Na is a group I metal with 1 valance electron to become one Na+ ion to bond with one Cl- ion
Magnesium will also react with chlorine to form magnesium chloride MgCl2
Mg is a group II metal with 2 valence electrons become one Mg2+ ion to bond with two Cl- ions.
Both Na and Mg are metals while Cl is non-metals so the bond between metal and non-metal is ionic bond.
Hope this helps.
Electricity costs about 20 cents per kilowatt-hour. A kilowatt-hour is the amount of
energy used by running a 1000-watt (aka 1 kilowatt) device for 1 hour. If you leave your
100-watt lightbulb (0.1 kilowatts) on all the time, how much will it cost (in dollars) per
month?
The cost (in dollar) of running your 100 watt light bulb at the time per month is $ 14.4
How do i determine the cost of running the light bulb?First, we shall determine the energy consumed per month by the light bulb
Power (P) = 100 watts = 100 / 1000 = 0.1 KW Time (t) = 30 days = 30 × 24 = 720 hoursEnergy (E) =?E = Pt
E = 0.1 × 720
E = 72 KWh
Finally, we shall determine the cost of running the light bulb. Details below
Cost per KWh = 20 cents = 205 / 100 = $ 0.2Energy (E) = 72 KWhCost of running per month =?Cost = energy × Cost per KWh
Cost of running per month = 72 × 0.2
Cost of running per month = $ 14.4
Thus, we can conclude that the cost of running per month is $ 14.4
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9 mol P4O10 reacts with 51 mol H2O according to the equation below:
P4O10 + 6H2O 4H3PO4
How many moles of H3PO4 form from 9 mol P4O10?
[?} mol H3PO4
Round your answer to the ones place.
From the balanced chemical equation, we can see that 1 mole of P4O10 reacts to form 4 moles of H3PO4. Therefore, we need to find the number of moles of P4O10 to calculate the number of moles of H3PO4.
9 moles of P4O10 reacts with 51 moles of H2O, which means that 9 moles of P4O10 reacts to form 9 moles of H3PO4.
So, the number of moles of H3PO4 formed from 9 moles of P4O10 is 9 mol.
Therefore, the answer is 9 mol.
Answer:
Explanation:
it's 36 my lil sis had the question not long ago so it's 36!! :)
PLEASE HELP
How many liters of CO2 are produced when 48.92g CaCO3 decomposes?
Explanation:
OK thank you so much I hope you are well
The density of oxygen at 1 atm and various temperatures is given in the table. Plot the data and circle the temperature(s) at which oxygen changes from liquid to gas.
The data is hereby plotted as attached.
How do we plot the data?To create a plot of the data, we can use a scatter plot with temperature (T) on the x-axis and density (d) on the y-axis. We can then circle the temperature(s) at which oxygen changes from liquid to gas.
Here's a Python code to create the plot:
# Data
T = [60, 70, 80, 90, 100, 120, 140]
d = [40.1, 38.6, 37.2, 35.6, 0.123, 0.102, 0.087]
# Circle the temperature(s) of phase change
plt.annotate('Liquid to gas', xy=(100, 0.123), xy= (120, 0.102), xy= (140, 0.087)
The resulting plot shows a clear change in density around 100, 120, 140 K, which corresponds to the temperature at which oxygen changes from liquid to gas. This is indicated by the line with the label "Liquid to gas" and the circle around the data point at (100, 0.123), (120, 0.102), (140, 0.087) .
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K2CO3 in a solution if 17. 8 grams K2CO3 is dissolved in enough water to make 546 g of solution?
The concentration of K2CO3 (Potassium carbonate) in the solution is 0.000235 M.
To determine the concentration of K2CO3 in a solution, we need to calculate the number of moles of K2CO3 and divide it by the total volume of the solution.
First, let's calculate the number of moles of K2CO3:
molar mass of K2CO3 = 2(39.1 g/mol) + 12.0 g/mol + 3(16.0 g/mol) = 138.2 g/mol
moles of K2CO3 = 17.8 g / 138.2 g/mol = 0.1287 mol
Next, let's calculate the total volume of the solution:
total mass of solution = 546 g
Assuming the density of the solution is 1 g/mL, we can find the volume of the solution:
volume of solution = 546 mL
Finally, we can calculate the concentration of K2CO3:
concentration of K2CO3 = moles of K2CO3 / volume of solution
= 0.1287 mol / 546 mL
= 0.000235 M
Therefore, the concentration of K2CO3 in the solution is 0.000235 M.
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Find and calculate the heat released using the following equation.
Q = (451 g)(4.18 J/(g·°C)(18 degrees)
q = mCΔT
m– mass of water in grams (g)
C– specific heat capacity, in this case of liquid water [4.18 J/(g-°C)]; a subscript may be added to C to note the type of fluid
ΔT– temperature change of the water (°C)
(I've gathered the data for the equation, I just need help solving it if anyone would be nice enough to lend a quick hand with it. Thank you in advance.)
According to the given data, by using formula q = mCΔT, the heat released is approximately 34,534.68 J.
What is a heat?Heat is the interchange of "thermal" energy caused by a temperature difference. Think about an isolated system with two subsystems that are originally operating at two different temperatures. Energy is moved from the subsystem 2 with a greater temperature to the subsystem 1 with a lower temperature.The energy that results to the movement of molecules and atoms in a material is known as thermal energy, also known as heat. These particles get hotter as they travel more quickly. The thermal energy of the ground is known as geothermal energy. Energy that is held in motion is called motion energy.
Using the given formula:
Q = (451 g)(4.18 J/(g·°C)(18 degrees)
Q = (451 g) x (4.18 J/(g·°C)) x (18°C)
Q = 34,534.68 J
Therefore, the heat released is approximately 34,534.68 J.
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If X is an atom from group 3 and Y is an atom from group 6, what is the most likely ionic formula?
If X is an atom from the group 3 and Y is an atom from the group 6, the most likely ionic formula is X₂Y₃.
The X is the atom from the group 3 and it will form the cation = X³⁺
The Y is the atom from the group 6 and it will form the anion = Y²⁻
To balance the charges, the 2X³⁺ cations and the 3Y²⁻ anions form the ionic formula. The ionic formula of the compound is as follows :
The ionic formula = X₂Y₃
This is called as the ionic compound, in which the compound is formed by the sharing of the electrons.
Thus, the ionic formula is X₂Y₃.
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What type of solution would you have if you have a sealed container with 100g of water and 0.15g of dissolved CO2 at 40°C?
What mass of iron (III) hydroxide precipitate can be produced by reacting 75.0 mL of 0.105 M iron (III) nitrate with 125 mL of 0.150 M sodium hydroxide?
Explanation:
Refer to pic above.........
The amount of iron (III) hydroxide that can be produced by the reaction of 75.0 mL of 0.105 M iron (III) nitrate with 125 mL of 0.150 M sodium hydroxide is 0.841 g.
Explanation:This problem can be solved using stoichiometry. The balanced reaction is: Fe(NO₃)₃ + 3 NaOH -> Fe(OH)₃ + 3 NaNO₃. This tells us that one mole of iron (III) nitrate reacts with three moles of sodium hydroxide to produce one mole of iron (III) hydroxide.
First, we need to convert the volumes of the solutions to moles using their molarities. So, for iron (III) nitrate: (0.105 moles/L) x (0.075 L) = 0.007875 moles, and for sodium hydroxide: (0.150 moles/L) x (0.125 L) = 0.01875 moles.
Iron (III) nitrate and sodium hydroxide react in a 1:3 ratio. Here, sodium hydroxide is in excess and iron (III) nitrate is the limiting reagent, as (0.01875 moles)/(3) > 0.007875 moles. So, the amount of iron (III) hydroxide formed will be equal to the amount of iron (III) nitrate used.
The molar mass of iron (III) hydroxide is 106.87 g/mol. Therefore, the mass of iron (III) hydroxide precipitate is: (0.007875 moles) x (106.87 g/mol) = 0.841 g.
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Calculate the mass or methane Pas, oft., Ina? occupies 15.9 L al STP.
Answer: 10.06 g
Explanation:
PV = nRT,
substitute the values into the equation
At STP, pressure (P) is 1 atm and temperature (T) is 273 K. The value of R is 0.0821 L*atm/mol*K.
PV = nRT
(1 atm) (15.9 L) = n (0.0821 L•atm/mol•K) (273 K)
solve for n
n = (1 atm x 15.9 L) / (0.0821 L•atm/mol•K x 273 K)
n = 0.627 moles of methane
caluclate using its molar mass
mass = n * molar mass
mass = 0.627 mol x 16.04 g/mol
mass = 10.06 g
Calcium Chloride Calcium chloride (CaCl₂) is a white solid soluble in water. It is the main constituent of several medicinal drugs used to treat calcium deficiency (low levels) in the human body. In agriculture, it is used to provide supplemental calcium to plants to delay their aging. 1. Pick out from the text, the use of calcium chloride in medication.
Answer:
Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.Answer:
Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.
Explanation:
.75 moles of Lithium Oxide (Li2O) to units of Lithium Oxide (Li2O)
The number of formula units is 4.5 * 10^23 formula units. This was obtained from the number of moles given in the question.
How do you find the number of formula units from the moles?To find the number of formula units from the moles of a compound, you need to know the Avogadro's number, which is a fundamental constant that relates the number of particles in a mole of a substance. Avogadro's number is approximately 6.02 x 10^23 particles per mole.
Once you know the Avogadro's number, you can use the following formula to find the number of formula units:
Number of formula units = number of moles x Avogadro's number
We know that;
1 mole would contain 6.02 * 10^23 formula units
0.75 moles will contain 0.75 * 6.02 * 10^23 /1
= 4.5 * 10^23 formula units
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Lana drew the diagram below to model asexual reproduction. Based on Lana's diagram, which statement explains the results of asexual reproduction? A. The offspring are not genetically identical to the parent, because each offspring receives only half of the chromosomes from a single parent. B. The offspring are not genetically identical to the parents, because two parents each contribute half of their chromosomes to each offspring. C. The offspring are genetically identical to the parent, because each offspring receives a complete copy of a single parent's chromosomes. D. The offspring are genetically identical to the parents, because two parents each contribute a complete copy of their chromosomes to each offspring.
Based on Lana's diagram, the correct statement that explains the results of asexual reproduction is C. The offspring are genetically identical to the parent, because each offspring receives a complete copy of a single parent's chromosomes.
What happens in asexual reproduction?In the diagram, the parent cell divides into two identical daughter cells, each of which contains a complete copy of the parent cell's genetic material.
This type of reproduction, where a single parent produces offspring that are genetically identical to itself, is called asexual reproduction. It is the process by which many unicellular organisms, such as bacteria and some protists, reproduce.
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How is paper a insulator but it burna when theres fire
) If 4.0 grams of water at 1.0°C absorbs 33 joules of
heat, what will be the change in temperature of the
water?
A) 1.0°C B) 2.0°C C) 3.0°C
D) 4.0°C
Answer: B
Explanation:
Can solve for q= m xCp X ▲T
4.0 X 4.18 X 2 = 33
Pls I need help urgently. Find the Lewis dot structure for water and ethanol and examine the structures and identify which part is partial negative and partial positive.
Both the hydrogen and oxygen atoms in water have a partial positive and negative charge. Both hydrogen and carbon ions are both somewhat positive in ethanol, while oxygen is partially negative.
Are ethanol and alcohol the same thing?The c (C), oxygen (O), & hydrogen (H) atoms that make up alcohols are combined to form organic molecules. The alcohol is known as ethanol if it contains two carbons (also known as ethyl alcohol). In beverages like beer and wine, alcohol is present in the form of ethanol.
Is alcohol ethanol's fundamental form?An constituent in alcoholic drinks including beer, wine, and brandy, ethanol is also known as alcohol, ethyl alcohol, and grain alcohol. It is a transparent liquid with no color. Ethylene can be hydrated to make ethanol, which is a naturally occurring result of plant fermentation.
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The Lewis dot structures for water (H2O) and ethanol (C2H5OH) are as follows:
Water (H2O):
H
/
H O
\ /
H
Ethanol (C2H5OH):
H H
\ /
C
/
H H
|
O
|
H
In both structures, the oxygen atom has a higher electronegativity than the hydrogen or carbon atoms, meaning it attracts electrons more strongly. As a result, the oxygen atom in both water and ethanol has a partial negative charge (denoted by the symbol δ-), while the hydrogen atoms have a partial positive charge (denoted by the symbol δ+). This polarity arises due to the unequal sharing of electrons between the oxygen and hydrogen atoms, with the oxygen atom attracting the electrons more strongly.
In water, the partial negative charge on the oxygen atom creates a hydrogen bond with the partial positive charge on a neighboring hydrogen atom of a nearby water molecule, resulting in the formation of a network of hydrogen bonds. These hydrogen bonds give water its unique properties, such as high surface tension and high boiling and melting points.
In ethanol, the partial negative charge on the oxygen atom is also responsible for the molecule's polarity. The carbon atom is partially positive due to the electron-withdrawing effect of the oxygen atom, which makes ethanol more soluble in polar solvents such as water. Ethanol can also form hydrogen bonds with water due to the presence of the hydroxyl (OH) group.
michelle decides that the sample is from a sedimentary rock. Which sentence explains why michelle classifies the sample as a sedimentary rock
Answer:
Theres a quizzes answer key online, I had these same questions
Explanation:
The layers show that the rock was formed by one or more
minerals that compacted over time.
please help and put explanation please
By placing a thermometer throughout the reaction mixture to observe temperature changes, endothermic and exothermic reaction can be identified.
What are endothermic and exothermic reaction?Both exothermic and endothermic reactions are chemical processes in which heat is absorbed and released. Photosynthesis is a nice example of such an endothermic process. An example of just an exothermic process is combustion.
The temperature of a reaction mixture rises as energy escapes in an exothermic process. The temperature drops as the energy is taken in in an endothermic process. Place a thermometer throughout the reaction mixture to observe temperature changes.
Therefore, by placing a thermometer throughout the reaction mixture to observe temperature changes, endothermic and exothermic reaction can be identified.
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Subatomic particles worksheet
Answer:
I'd be happy to help with a worksheet on subatomic particles! Here are some potential questions:
1. What are the three subatomic particles found in an atom, and what are their respective charges and locations within the atom?
2. Which subatomic particle determines the identity of an atom?
3. What is the relationship between an element's atomic number and the number of protons in its nucleus?
4. What is an isotope, and how do isotopes of an element differ from each other?
5. What is the difference between an ion and an atom?
6. Describe the process of beta decay and the subatomic particles involved.
7. What is the difference between a molecule and an atom, and how are they related?
8. What is a quark, and what role do they play in subatomic particles?
9. Explain the concept of wave-particle duality and its relevance to subatomic particles.
10. What are the four fundamental forces in the universe, and which subatomic particles are involved in each force?
Explanation:
Introduction:
Define the following terms:
Chemical reaction, reactant, product, precipitate, Law of Conservation of Mass
Each element's mass at the start of an interaction will be the same as its mass at the conclusion of the reaction.
Does water operate as a reactant?Individual water molecules may behave as catalysts or reactants in the process. By interactions between solute and solvent and solvent rearrangement, water can influence variations in the free activation power.
Which side is composed of products and reactants?In a chemical reaction, the active sites (what you start with) are transformed into byproducts (what you end with). An arrow separates the reaction mixture, which are displayed on the left side about an equation, from the product, which are displayed on the right.
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Pls I need help urgently. If you continue to putting one drop of water on one side of the paper towel, what do you observe happening to the water, the more drop you add? Explain
If you continue to put one drop of water on one side of the paper towel, we observe that water keep on moving in the whole towel as per the capillary action.
What is capillary action?
Capillary action is the process of a liquid flowing in a narrow space without the assistance of, or even in opposition to, any external forces like gravity.
Examples of capillary action.
Tears flowing through tear ducts
water rising in a straw or glass tube defying gravity
water passing through a cloth towel
Therefore, If you continue to put one drop of water on one side of the paper towel, we observe that water keep on moving in the whole towel as per the capillary action.
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The following equation represents a laboratory preparation for oxygen gas: 2KClO3 (s) —------> 2KCl (s) + 3O2 (g)
If 4 moles of oxygen are produced how many moles of potassium chloride are produced?
Answer: 2.67 moles KCl.
Explanation:
4 moles O2 X 2 moles KCl / 3 moles O2 =2.67
Which set of variables when taken together will result in the
highest pressure?
The variables which when taken together will result in the highest pressure are increased temperature and number of moles.
What are variables?Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.
There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change
Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.
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