a material that has more than one set of properties
Answer:
heterogeneous mixture
Explanation:
the particles of each substance can be seen and the mixture has more than one set of properties.
Find the distance between the two points rounding to the nearest tenth (if necessary). ( 8 , − 5 ) and ( 1 , 1 )
The distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.
What is the distance between two points?
The distance between two points is calculated using the following equation.
for a given points (x1, y1), (x2, y2), the distance, d is;
d = √[(x2-x1)² + (y2 - y1)²]
From the given question;
x1 = 8, y1 = -5
x2 = 1, y2 = 1
distance = √[(1-8)² + (1 - -5)²]
distance = √[(-7)² + (16)²]
distance = 9.22 units
Thus, the distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.
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the general molecular formula for alkanes is cnh2n 2. what is the general molecular formula for cycloalkanes? click in the answer box to activate the palette.
The cycloalkanes have the general formula CnH2n, where n is the number of carbons.
The carbon atoms of cyclic hydrocarbons, such as cycloalkanes, are organized in the shape of a ring. Additionally saturated, cycloalkanes have single bonds between all of the carbon atoms that make up the ring (no double or triple bonds). Additionally, there are polycyclic alkanes, which are compounds made up of two or more cycloalkanes linked together to form numerous rings.Cycloalkane naming adheres to a straightforward set of guidelines that are based on the same fundamental procedures used to name alkanes. The prefix "cyclo-" is used to identify cyclic hydrocarbons.Numerous organic molecules, referred to as cycloalkanes, can be found in nature or made in a lab and include rings of carbon atoms with distinctive chemical properties.Therefore, the general formula for cycloalkanes is CnH2n.
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Which of the following is an element?
A. Methane
B. Ozone
C. Ice
D. Air
Answer:
Methane
Explanation:
Beause it's a compound
Answer:
A methane
Explanation:
Methane is one carbon compound in which carbon is attached by hydrogen atom's. It's molecular formula is CH4
Most earth sciences specialize in studying one aspect of the planet true or false
Answer:
oil & mining are big in earth sciences
Answer:
false
Explanation:
there are lot of aspects of Mars that they are disconcerting still like scientists get paid a lot because of that astronomers get paid a lot because of that also.
list some characteristic properties that distinguish the metallic elements from the nonmetallic elements
The metals are malleable and ductile, which means that they can be beaten into sheets and can be given any desired shape while the nonmetals are brittle and soft. Metallic elements are considered as good conductors of electricity and heat while nonmetallic elements are poor conductors. Metals are lustrous while nonmetals are nonlustrous.
A metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets).
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suppose a student poured equal volumes of water and naoh in two different flasks. he forgets to label his flasks and is confused about which is which. he decides to determine the contents of the flasks by adding 10 ml of each to 10 ml of hcl.
The one with higher temperature is the one with NaOH as heatis given off during the neutralization reaction that occurs.
What is volume?Volume can be defined as the amount of space a substance or an objects occupies usually in a closed container.
Volume is measures in litres.
When water is added to dilute acid like HCl, they become more dilute.
When NaOH is added to HCl, a neutralization reaction occurs.
The student will determine the contents of the flasks by adding 10 ml of hcl to each flask. If the NaOH reacts with the Hcl, there will be an increase in temperature.
The increase in temperature is due to the heat of neutralization of the reaction between NaOH and HCl.
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Reading chemical symbols
Answer:
do u need answer for all of them?
Lithium
Sodium
Which of these statements are true?
O sodium is much smaller than lithium
O Lithium has more protons, neutrons and electrons.
O There is no difference between lithium and sodium.
O Sodium has more protons, neutrons and electrons than Lithium
Sodium has more protons, neutrons, and electrons than Lithium.
Components of atomsThe nuclei of atoms consist of protons and neutrons. Both component form the bulk of the mass of atoms.
Outside the nucleus, electrons are found in the orbitals surrounding the nucleus.
The atomic number of an atom is the number of protons in the nucleus of the atom. For neutral atoms, the number of protons and electrons is the same.
The atomic number of Lithium is 2, while that of Sodium is 11. This means Lithium has 2 protons while sodium has 11.
The atomic mass of Lithium is 7 while that of sodium is 23. This means that sodium has more neutrons than lithium.
Thus, sodium has more neutrons, electrons, and protons, than lithium.
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draw the diazonium cation formed when cytosine reacts with nano2 in the presence of hcl. cytosine reacts with n a n o 2 and h c l. cytosine is a 6 membered ring consisting of a nitrogen bonded to a hydrogen at position 1, a carbon double bonded to oxygen at position 2, and a nitrogen at position 3 that is double bonded to the carbon on position 4. there are carbons at positions 5 and 6 and they are double bonded to each other. lastly, the carbon in position 4 has an nh2 substituent.
When cytosine reacts with NaNO2 and HCl to form Diazonium salt.
What is Diazonium salt?Diazonium salt or diazonium compounds are defined as the group of the organic compounds which sharing a common functional group [R−N⁺≡N]X⁻ where R is any organic group, like an alkyl or an aryl, and X can be an organic or inorganic anion, like a halide.
As we know that, Cytosine is a 6 membered ring consisting of
a nitrogen arom is bonded to a hydrogen at position 1. a carbon is doubly bonded with the oxygen present at position 2.and a nitrogen which is at position 3 that is doubly bonded with the carbon at position 4. There are carbons at positions 5 and 6 and these are doubly bonded with each other. Lastly, the carbon in position 4 has an NH2 substituent.Thus, we concluded that the cytosine reacts with NaNO2 and HCl to form Diazonium salt.
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you have a 5.0 ml sample of a protein in 0.5m nacl. you place the protein/salt sample inside dialysis
The final Concentration of salt having a 5.0 ml sample of a protein in 0.5m nacl. you place the protein/salt sample inside dialysis is 0.62mM.
What is Concentration?Concentration is defined as the ratio of number of moles of substance to the volume of the substance occupied.
The dialysis is normally dilution of the solution as the dialysis bag the salt present in protein sample is pass and go to the dialysing rhe solvent (water).
CalculationAs we know that,
M1V1 = M2V2
M1 and M2 are the initial and final concentration of NaCl in the dialysis bag.
V1 and V2 are the initial and final volume of NaCl in the dialysis bag.
Given,
M1 = 0.5M
V1 = 5mL = 0.005L
V2 = 4 + 0.005 = 4.005L
By substituting all the values, we get
M2 = 0.5 × 0.005/4.005
= 0.00062M
= 0.62mM.
Thus, we calculated that the final Concentration of salt is 0.62mM.
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DISCLAIMER:
The above question is incomplete.
Here is the complete question:
You have a 5.0 ml sample of a protein in 0.5M NaCl. You place the protein/salt sample inside dialysis tubing and place the bag in a large beaker of distilled water. Your goal is to remove as much NaCl from the sample as possible. Since you know that the final salt concentration will be the same inside the tubing as out, you can calculate the final concentration of the salt.
A. If you decide to place the dialysis bag in 4.0 L of distilled water for 12 h the final concentration of the salt would be in ________ mM
Using the periodic table above and your knowledge of patterns and trends on the table, which of the following elements is the best conductor of electricity? (1 pt)
*
1 point
Titanium (Ti, #22)
Silicon (Si, #14)
Oxygen (O, #8)
Argon (Ar, #18)
The metals are good conductor of electricity, thus among this titanium is the best conductor of electricity.
What are conductors?Conductors is defined as a substance or type of material that allow flow of charge or electricity in one or more direction. Metals are commonly consider as a good conductor of electricity. It allow electricity to flow through them very easily and produce electric current.
Metals are defined as the elements that are typically hard due to presence of strong metallic connection between the atoms.
Thus, metals are good conductor of electricity, thus among this titanium is the best conductor of electricity.
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When iron is placed in nitrogen no occurs
Nothing happens if the iron rod is inserted into the nitrogen. However, when the iron rod is suspended in the air.
A non-metal, nitrogen is. As a result, it typically interacts with metals to create ionic compounds. Only when the reactants produce products that allow the system as a whole to release energy does the reaction take place. If the system requires energy to undergo the reaction, the reaction cannot take place. When iron is exposed to oxygen and moisture for an extended length of time, a process known as iron oxide occurs. At the atomic level, oxygen bonds to iron to produce the complex known as an oxide, which weakens the metal bond.
The complete question is - If a piece of pure iron is placed in pure nitrogen, nothing happens. If the iron is exposed to air, it begins to rust. What conclusion can you make about air, based on this observation?
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Find the THREE true statements:
☑️If Zinc has an atomic number of 30 and a mass number of 65, the correct number of protons, neutrons, and electrons, respectively, is: 30,35,30
☑️If Magnesium has an atomic number of 12 and a mass number of 24, the correctnumber of protons, neutrons, and electrons, respectively, is: 12,24,12
☑️If Lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is: 3,4,3
☑️If Calcium has an atomic number of 20 and a mass number of 40, the correct number of protons, neutrons, and electrons, respectively, is: 20,20,20
☑️If Fluorine has an atomic number of 9 and a mass number of 19, the correct number of protons, neutrons, and electrons, respectively, is: 9,9,9
Taking into account the definition of atomic number and mass number, the three true statements are:
If Zinc has an atomic number of 30 and a mass number of 65, the correct number of protons, neutrons, and electrons, respectively, is: 30,35,30If Lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is: 3,4,3If Calcium has an atomic number of 20 and a mass number of 40, the correct number of protons, neutrons, and electrons, respectively, is: 20,20,20Subatomic particlesAll atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them. Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged (electrons).
Atomic numberThe atomic number of a chemical element is the total number of protons that each atom of that element has.
Atoms in nature are electrically neutral, so the number of positive and negative particles is the same. That is, in an atom that has no charge, the atomic number also indicates the number of electrons.
Mass numberThe mass number indicates the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus:
Mass number = (number of protons) + (number of neutrons)
So, If you know the number of protons and the mass number, the number of neutrons can be calculated as:
Number of neutrons= mass number - number of protons
This caseConsidering the definition of atomic and mass number, you can know:
Zinc has an atomic number of 30 and a mass number of 65. The correct number of protons and electrons is 30, while the number of neutrons is 65-30= 35Magnesium has an atomic number of 12 and a mass number of 24. The correct number of protons and electrons is 12, while the number of neutrons is 24 -12= 12Lithium has an atomic number of 3 and a mass number of 7. The correct number of protons and electrons is 3, while the number of neutrons is 7-3= 4Calcium has an atomic number of 20 and a mass number of 40. The correct number of protons and electrons is 20, while the number of neutrons is 40 -20= 20Fluorine has an atomic number of 9 and a mass number of 19. The correct number of protons and electrons is 9, while the number of neutrons is 19 -9= 10Finally, the three true statements are:
If Zinc has an atomic number of 30 and a mass number of 65, the correct number of protons, neutrons, and electrons, respectively, is: 30,35,30If Lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is: 3,4,3If Calcium has an atomic number of 20 and a mass number of 40, the correct number of protons, neutrons, and electrons, respectively, is: 20,20,20Learn more about number of protons, neutrons and electrons:
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(bonus) Which of the following sets of elements should have the most similar chemical properties? (1 pt)
*
1 point
Sodium (Na, #11), Aluminum (Al, #13), Chlorine (Cl, #17)
Chlorine (Cl, #17), Argon (Ar, #18), Potassium (K, #19)
Beryllium (Be, #4), Calcium (Ca, #20), Radium (Ra, #88)
Beryllium, Calcium, Radium elements should have the most similar chemical properties.
What are chemical properties?
Chemical properties can be defined as a characteristics or behavior of the substance that be observed when it undergo a chemical change or reaction. Chemical properties may include flammability, toxicity, acidity, basicity, reactivity, heat of combustion and many more.
Beryllium, Calcium and Radium are the elements of alkaline earth metal and the share most of the similar chemical and physical properties.
Thus, Beryllium, Calcium, Radium elements should have the most similar chemical properties.
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Tony walks at an average speed of 70m/min from his house to school. if the distance between his home and the school is 2100 m, how much time does it take for tony to walk to school?
Tony with an average speed of 70m/min walks the distance from his house to school in a time of: 30 min
The formula and procedure we will use to solve this exercise is:
t = x/v
Where:
x = distance
t = time
v = velocity
Information about the problem:
v = 70m/minx= 2100 mt = ?Applying the time formula we have that:
t = x/v
t = 2100 m/ (70m/min)
t = 30 min
What is velocity?It is a physical quantity that indicates the displacement of a mobile per unit of time, it is expressed in units of distance per time, for example (miles/h, km/h).
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Pleaseeeeeee help meeee
Answer:
2
1
2
3
3
1
Explanation:
In the first law, an object will not change its motion unless a force acts on it.
This is exactly how it worked in the (Last one). There is no movement with no force. The Second one seems a bit strange, but it's been known that inertia is the same as the first law. Why is that? Because there is no force acting on the water but there is some force acting on the glass.
In the second law, the force on an object is equal to its mass times its acceleration.
(First one& Third One) Increasing mass means increasing the force to accelerate with the same magnitude
In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction
The Fifth one. The combustion of the fuel produce force which is greater than the gravititional force acting on the rock. Therefore, a force has a reaction force which accelerates the rock upwards.
The Fourth is pretty much the same. A force of inertia acting as the reaction force here which refuses to move with the paper.
If you didn't get what i mean in any of those please let me know
slove this...........................
Explanation:
................easy ngl
Answer:
for protons going down it is:
(already given)
6
6
8
8
17
17
for neutrons going down it is:
6
7
8
(already given)
10
18
20
for electrons going down it is:
6
6
8
8
(already given)
17
Explanation:
bascially the number of protons is the bottom number to the left and the number of electrons is the same as the number of protons and the number of neutrons is basically the mass number (the top right one) minus the proton number
hope this helps:)
a 3.214 g sample of magnesium reacts with 8.416 g of bromine (br2). the only product is magnesium bromide (mgbr2). how much mgbr2 is formed?
The reaction between 3.214 g magnesium and 8.416 g bromine produces 9.7 g of MgBr2.
The balanced chemical reaction of magnesium and bromine is shown below.
Mg + Br2 → MgBr2
Step 1: Convert the given mass of reactants to moles of reactants
moles Mg = mass Mg / molar mass Mg
moles Mg = 3.214 g / 24.31 g/mol
moles Mg = 0.1322 mol
moles Br2 = mass Br2 / molar mass Br2
moles Br2 = 8.416 g / 159.808 g/mol
moles Br2 = 0.0527 mol
Step 2: Bromine (Br2) is determined to be the limiting reactant. Since the stoichiometric ratio between the reactants is equal to 1, the reactant with a lower number of moles would be the limiting reactant.
Step 3: Convert moles of Br2 to the mass of MgBr2. Their stoichiometric ratio is also 1, which makes the solution easier.
mol Br2 = mol MgBr2
mass MgBr2 = mol MgBr2 * molar mass MgBr2
mass MgBr2 = 0.0527 mol * 184.118 g /mol
mass MgBr2 = 9.70 g
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what do you think will happen to the temperature if you use 75 ml of hcl and 75 ml of naoh instead of the 50 ml each that you used in experiment 1?
The thing that will happen to the temperature if you use 75 ml of HCl and 75 ml of NaOH instead is that it increases as more heat is released.
How to explain the reaction?A neutralization occurs when NaOH and HCl are combined. Each chemical reaction has a unique heat of reaction, which is the heat exchanged during the process.
The reaction in issue is exothermic (emits heat), and the amount of heat emitted relies on the chemicals used, their concentrations, and the working temperature (it is produced at a low temperature).
The fluctuation in temperature and the mass used determine how much heat is allocated.
In this case, the thing that will happen to the temperature if you use 75 ml of HCl and 75 ml of NaOH instead is that it increases as more heat is released.
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part 1. determine the molar mass of a 0.458-gram sample of gas having a volume of 1.20 l at 287 k and 0.980 atm. show your work.
The ideal gas equation can be used to determine the molar mass of the substance with the help of the moles. The molar mass of the gas having a mass of 0.458 grams is 9.15g/mol.
What is the ideal gas law?
Ideal gas law gave the relation between the moles, pressure, temperature, volume, and the gas constant. The moles of the ideal hypothetical gas can be used to calculate the molar mass.
An ideal gas equation is given as:
PV =nRT
Given,
Mass = 0.458 gm
Pressure (P) = 0.98 atm
Volume (V) = 1.2 L
Temperature (T) = 287 K
Gas constant (R) = 0.0821
Substituting values in ideal gas as:
0.98 × 1.2 = n × 0.0821 × 287
n = 1.18 ÷ 23.56
n = 0.05moles
Now, moles are used to calculate molar mass as:
molar mass = mass ÷ moles
= 0.458 ÷ 0.05
= 9.15g/mol
Therefore, 9.15g/mol is the molar mass of the unknown gas.
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A solid metal sphere has a volume of 0.0041 m² and a mass of 0.859 kg. Determine the
density in g/cm³
The density in g/cm³ is 0.2095 g/cm³.
The mass of a material substance per unit volume is known as density. The equation for density is d = M/V, where d represents density, M is mass, and V is volume. Density is often measured in grams per cubic centimeter. The weight of an object can be calculated by dividing its mass by the acceleration of gravity; this value is often more significant practically than the mass.
Other tables include information on the weight of various materials per unit volume; this quantity is also known as weight density, specific weight, and unit weight. also take a look at specific gravity. The most popular way to indicate particle density is as n, which instead of referring to the number of particles per unit volume
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How do i find the charge?
Answer:
An easy way to work out the charge of an atom is to look at the periodic table. Elements on the left side of the table usually become positively charged ions and elements on the right side of the table typically have a negative charge. However, you can use a scientific formula to determine the formal charge of an atom.
Explanation:
justify the statements that the cell is the basic unit of all living things
cell is a basic unit of all living things.
Explanation:
because all the metabolic activities performed by the body are outcome of cellular activities
What causes the element name to change (grade 9 Science)?
What is the mass of reactants and products: 2H2 + O2 —> 2 H2O
The molecular mass of reactants and products in 2H2 + O2 —> 2 H2O is 36 g/mole.
What is molecular mass?Molecular mass can be defined as the some of the atomic masses of all the atoms in the molecule of a substance.
It is a molecule relative mass represented by atomic mass unit. It is used to those substance whose constituent particles are molecule.
The molecular mass of 2H2 + O2 —> 2 H2O can be calculated as:
= 2(1x2) + (16x2) -> 2(1x2 + 16)
= 2(2) + 32 ->2(2 + 16)
= 4 + 32 -> 36
= 36 -> 36
Therefore, the molecular mass of reactant is equal to the molecular mass of product.
Thus, the molecular mass of reactants and products in 2H2 + O2 —> 2 H2O is 36 g/mole.
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How would I find the mass of the statue? Is it conversions or just basic math?
The replacement of gold from trapped pedestal is a mathematical equation.
What is density?Density is defined as the measurement of how tightly the material is packed together. It can also be defined as the substance mass per unit volume.
The S.I. unit of density is kilogram per cubic meter.
Density = mass / volume
Thus, the replacement of gold from trapped pedestal is a mathematical equation.
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a covalent bond is likely to be polar when . question 4 options: the two atoms sharing electrons are of the same elements carbon is one of the two atoms sharing electrons one of the atoms sharing electrons is more electronegative than the other atom the two atoms sharing electrons are equally electronegative
A covalent bond is likely to be polar when one of the atoms sharing electrons is more electronegative than the other atom.
When the electronegativity difference is greater, the bond polarity is increasing.
Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.
Atoms with higher electronegativity attracts more electrons towards it, electrons are closer to that atom.
For example, water (H₂O) is a polar molecule. Atom of oxygen has higher electronegativity and negative charge, while atom of hydrogen has lower electronegativity and positive charge. Atoms of hydrogen and oxygen are connected by polar covalent bonds.
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In this experiment you are going to use 100. Mg of sodium borohydride. How many moles of sodium borohydride will you use?.
0.00264 moles of sodium borohydride will be used.
m(NaBH₄) = 100 mg ÷ 1000 mg/g
m(NaBH₄) = 0.1 g; mass of sodium borohydride
M(NaBH₄) = 37.83 g/mol; molar mass of sodium borohydride
n(NaBH₄) = m(NaBH₄) ÷ M(NaBH₄)
n(NaBH₄) = 0.1 g ÷ 37.83 g/mol
n(NaBH₄) = 0.00264 mol; amount of sodium borohydride
Sodium borohydride is white solid and it is a reducing agent.
Sodium tetrahydridoborate is an inorganic compound with the formula NaBH₄.
Mass is a fundamental measure of the amount of matter in the object.
Kilogram (symbol: kg) is the base unit of mass in the International System of Units.
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When making the heating curve for your experiment today the water begins to plateau at a specific temperature. What is this state called?.
From the question, the point at which the heating curve does plateau is the boiling point of water.
What is the heating curve?The heating curve is used tool that we use to see how the temperature change by the addition of heat affects the state of matter in which the material is obtained. The vertical axis could be used to plot the temperature while the horizontal axis could be used to plot the changes in the state of matter.
There are three states of matter namely;
Liquid
Solid
Gas
Water can be able to exist in all the states of matter that have been mentioned but there is a temperature range at which each state of matter can be observed. Thus we have the solid range, liquid range and the gaseous range of water.
Looking at the graph, when we begin to heat the water, the water is liquid at the start but the temperature increases rapidly. This increase would continue until the temperature of the water begins to plateau. The point of plateau is the boiling point of water.
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This state at a specific temperature is called phase change.
For example, evaporization is phase change process in which the water changes from a liquid to a gas (water vapor).
Other example, condensation is phase change process in which the water changes from a gas to a liquid.
Heating curve of water show how the temperature changes as water is heated up. A heating curve for water that shows transition zones (see the picture below).
The first phase change is melting, the temperature stays the same while an ice melts.
The second phase change is boiling, the temperature stays the same while a water boils.
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