Answers
Related Questions
Explain how some salt solutions can be heavy and some light if they are made
with the same materials.
Answers
Answer:??????
Explanation:
It is not safe to put an aerosol canister in a campfire, because the pressure Inside the can gets very
high at the temperature rises....it can explode! If you have a 1500 milliliter canister that holds 3 moles
of gas, and the campfire temperature reaches 1500 °C, what is the pressure in atmospheres inside the
canister?
Answers
To calculate the pressure inside the canister, we can use the ideal gas law equation:
PV = nRT
Therefore, the pressure inside the canister at a campfire temperature of 1500 °C is approximately 136.39 atmospheres.
To calculate the pressure inside the canister, we can use the ideal gas law equation:
PV = nRT
Where:
P = pressure (in atmospheres)
V = volume (in liters)
n = number of moles of gas
R = ideal gas constant (0.0821 L·atm/(mol·K))
T = temperature (in Kelvin)
First, we need to convert the volume from milliliters to liters:
1500 milliliters = 1500/1000 = 1.5 liters
Next, we need to convert the temperature from Celsius to Kelvin:
1500 °C + 273.15 = 1773.15 K
Now, we can substitute the values into the ideal gas law equation:
P * 1.5 = 3 * 0.0821 * 1773.15
Simplifying the equation:
P = (3 * 0.0821 * 1773.15) / 1.5
Calculating the value:
P ≈ 136.39 atm
Therefore, the pressure inside the canister at a campfire temperature of 1500 °C is approximately 136.39 atmospheres.
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The gases in a hair spray can are at a temperature of 27OC and a pressure of 30 lbs/in2. If the gases in the can reach a pressure of 90 lbs/in2, the can will explode. To what temperature in kelvin must the gases be raised in order for the can to explode? Assume constant volume. (1 sig fig for answer)
50 points
Answers
As we know that the volume is constant, we can say that PV1 = PV2.
P1V1 = P2V2
We also know that P1 = 30 lbs/in2, P2 = 90 lbs/in2
Rearranging the equation, we can find the temperature T2:
T2 = (P1V1/nR) * (P2/P1) = (30 lbs/in2 * V1/nR) * (90 lbs/in2/30 lbs/in2)
P1 and V1 are known. We need to find T2.
T2 = (27+273.15) * (90/30) = (300) * 3 = 900 K
So, the temperature in kelvin must be raised to 900 K in order for the can to explode.
What is higher boiling point alkyne or alkyl halides??
Answers
Answer: alkyl halide
Explanation: brianlist please?
Please Help ASAP - 100 pts + Brainliest if correct!
Answers
(e)
1. When CO2 (s) sublimes, there is a change in the
A) bond type
B) gram-formula mass
C) molecular polarity
D) particle arrangement
Answers
Answer:
D)Particle Arrangement
Explanation:
When solid carbon dioxide CO₂ will evaporate in gaseous carbon dioxide CO₂ the particles arrangement will change from ordered in solid state to completely disordered in gaseous state.
Bond type, gram formula mass and molecular polarity are not changed in the described physical transformation.
which of the following is the correct net ionic equation of the reaction that occurs when aqueous solutions of ammonia and hydrochloric acid are combined?
Answers
Answer: NH₃ (aq) + H⁺ (aq) ⇒ NH₄⁺ (aq)
Explanation:
Step 1: Write the balanced equation and include the state, in this case aqueous (aq) as stated in the problem.
NH₃ (aq) + HCl (aq) ⇒ NH₄Cl (aq)
Step 2: Break apart strong electrolytes to form the complete ionic equation.
Ammonia is a weak base so it will not completely break apart in solution. HCl is a strong acid so it will break apart in solution. Ammonium chloride is an ionic compound, so it will break apart too.
NH₃ (aq) + H⁺ (aq) + Cl⁻ (aq) ⇒ NH₄⁺ + Cl⁻ (aq)
Step 3: Remove the spectator ions that are found on both sides of the equation. Cl- (aq) is on both sides of the equation, so it is a spectator ion and can be crossed out.
NH₃ (aq) + H⁺ (aq) + Cl⁻ (aq) ⇒ NH₄⁺ (aq) + Cl⁻ (aq)
NH₃ (aq) + H⁺ (aq) ⇒ NH₄⁺ (aq)
a student is given the task of determining the molar concentration of a cuso4 solution using two different procedures precipitation and spectrophotometry
Answers
The correct option which can help in defining this question is- M1V1 = M2V2 50 X 0.05 = 0.1 X V2 V2 = 25 ml H
Procedure for precipitation:
In this procedure, the Cuso4 solution is mixed with a known quantity of potassium chromate (K2CrO4). A yellow precipitate develops as a result. Filtering the solution and drying the precipitate yields the amount of this precipitate. The molar concentration of the solution is then determined using the mass of the precipitate.Procedure for Spectrophotometry:
The method of spectrophotometry is used to gauge how much light a sample has absorbed. A specific wavelength of light is used in this process to pass through the Cuso4 solutionThe solution's molar concentration is then determined by measuring the amount of light that is absorbed.The molar concentration of the Cuso4 solution can be calculated by combining the outcomes from both the precipitation and spectrophotometry procedures.To know more about molar concentration here
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What is the name for a particle that has a mass about 1/1835 of a proton, but with a negative charge
Answers
Answer:
Electron
Explanation:
electron configuration for group 15, period 3
Answers
Answer:
Phosphorus
Explanation:
This should be the correct answer
If not then im sorry :)
WILL GIVE 50 POINTS AND BRAINLIEST
Plate Tectonics Lab Report
Instructions: In the Plate Tectonics lab you will investigate the interactions between continental and oceanic plates at convergent, divergent, and transform boundaries around the globe. Record your observations in the lab report below. You will submit your completed report.
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objective(s):
In your own words, what was the purpose of this lab?
Hypothesis:
In this section, please include the if/then statements you developed during your lab activity for each location on the map. These statements reflect your predicted outcomes for the experiment.
Location One: Select two events that you predict will be observed. If I explore two continental plates at a convergent boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Two: Select three events that you predict will be observed. If I explore two continental plates at a divergent boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Three: Select three events that you predict will be observed. If I explore two continental plates at a transform boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Four: Select two events that you predict will be observed. If I explore two oceanic plates at a convergent boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Five: Select three events that you predict will be observed. If I explore two oceanic plates at a divergent boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Location Six: Select two events that you predict will be observed. If I explore two oceanic plates at a transform boundary, then I will observe:
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Procedure:
The procedures are listed in your virtual lab. You do not need to repeat them here. Please be sure to identify the test variable (independent variable), outcome variable (dependent variable).
Reminder: Test variable = the item you are changing or manipulating; Outcome variable = the item you are measuring
Test variable (independent variable):
Outcome variable (dependent variable):
Data:
Record the data from each location below.
Location Name Boundary Type
(C=Convergent, D=Divergent, or T=Transform) Year Observed
(5, 10, or 20 million years) Geologic Events Observed
(earthquakes, faults, ocean formation, mountains, volcanoes, island chains, seafloor spreading)
Location One
Himalayas 5 Event 1-
20 Event 2-
Location Two
East Africa 5 Event 1-
10 Event 2-
20 Event 3-
Location Three
San Andreas fault zone 5 Event 1-
10 Event 2-
20 Event 3-
Location Four
Aleutian Islands 5 Event 1-
20 Event 2-
Location Five
Mid-Atlantic Ridge 5 Event 1-
10 Event 2-
20 Event 3-
Location Six
Alpine Fault 5 Event 1-
20 Event 2-
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please write in complete sentences.
What types of geological events or changes occur at divergent plate boundaries?
What types of geological events or changes occur at convergent plate boundaries?
What types of geological events or changes occur at transform plate boundaries?
Explain how these geological processes and interactions have changed Earth's surface through the years. Be sure to use evidence to support your answer.
Answers
Answer:
here are what i have so far, im doing this right now
Explanation:
Plate Tectonics Lab Report
Instructions: In the Plate Tectonic lab you will investigate the interactions between continental and oceanic plates at convergent, divergent, and transform boundaries around the globe. Record your observations in the lab report below. Y
Objective(s):
To look at interactions between continental and oceanic plates, etc.
Hypothesis:
In this section, please include the if/then statements you developed during your lab activity for each location on the map. These statements reflect your predicted outcomes for the experiment.
Location One: Select three events that you predict will be observed. If I explore two continental plates at a convergent boundary, then I will observe:
• earthquakes
• mountains
• volcanoes
Location Two: Select three events that you predict will be observed. If explore two continental plates at a divergent boundary, then I will observe:
• ocean formation
• volcanoes
• seafloor spreading
you will submit your completed report
ps; you might want to change up the objective.
A geological event is a brief, spatially diverse, dynamic and ongoing occurrence in the history of the Earth.
What is geological event?A geological event is a brief, spatially diverse, dynamic (diachronous), and ongoing occurrence in the history of the Earth that aids in the modification of the Earth system and the production of geological strata. The concept of event stratigraphy initially came up as a way to identify, analyse, and correlate how significant physical and biological events have affected the overall stratigraphical record.
Israel's Dead Sea basin Holocene sediments contain seismic activity. This can be considered a record of a geological event, an earthquake, that altered the strata. Geological events can occur over timescales of order of magnitude, from just a few seconds through millions of years, as well as on a variety of spatial scales, from the local to the globe.
1. Volcanoes and minor earthquakes
2. Volcanoes, earthquakes and fold mountains.
3. Earthquakes and fold mountains.
4. Magma from volcanoes is filled with nutrients that makes land fertile.
Therefore, a geological event is a brief, spatially diverse, dynamic and ongoing occurrence in the history of the Earth.
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H₂F5BLi
plsssss helppp ima fail if i don’t go this
Answers
The chemical elements involved are; hydrogen, fluorine, boron and lithium
There are two hydrogen atoms, five fluorine atoms, one boron atom and one lithium atom.
What is a chemical formula?Chemical compounds are represented symbolically by chemical formulas, which reveal the types and amounts of atoms that make up the compound. It is a succinct approach to explain a substance's makeup.
The components of a compound are identified in a chemical formula by their corresponding chemical symbols, which are typically derived from their English or Latin names. The number of atoms of each element in a single compound molecule is indicated by the subscripts that follow each element.
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When the concentration of reactant molecules is increased
Answers
Complete question is;
When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases,
A)the average kinetic energy of molecules increases.
B)the frequency of molecular collisions increases.
C)the rate constant increases.
D)the activation energy increases.
E)the order of reaction increases.
Answer:
B) The frequency of molecular collisions increases.
Explanation:
When we increase number of reactant molecules, the effective collision between the reactant molecules will form a product which also increases. As a result, the overall rate of the reaction will also increase which means the frequency of the molecular collision will also increase as well.
Thus, the correct answer is Option B
Mylanta a common antacid contains magnesium hydroxide Mg (OH)2.How many miles of magnesium hydroxide are in 75.0g of magnesium hydroxide?
Answers
To answer this question, we need to convert grams to moles and then use the Avogadro's number to convert moles to molecules.
The molar mass of Mg(OH)2 is 58.32 g/mol.
First, we need to find the number of moles of Mg(OH)2 in 75.0 g.
75.0 g / 58.32 g/mol = 1.287 mol
Next, we need to convert moles to molecules.
1.287 mol x 6.022 x 10^23 molecules/mol = 7.75 x 10^23 molecules
Finally, we can use the molecular formula of Mg(OH)2 to calculate the number of miles of Mg(OH)2.
1 molecule of Mg(OH)2 contains 3 atoms of oxygen (O) and 2 atoms of hydrogen (H).
So, the total number of miles of Mg(OH)2 is:
7.75 x 10^23 molecules x 2 miles/molecule = 1.55 x 10^24 miles
Therefore, there are 1.55 x 10^24 miles of magnesium hydroxide in 75.0 g of magnesium hydroxide.
If a person gains 72 m/s after covering 540m. Calculate the time taken.
Answers
Answer:
3.9 seconds
Explanation:
Given:
Final velocity = 72 m/sDistance covered = 540 mTo find:
Time taken = ?Solution:
We can use the equation,
v = u + at
where,
v is the final velocityu is the initial velocitya is the acceleration t is the time takenWe know that the initial velocity is 0, so the equation becomes,
v = at
We can also use the equation,
s = ut + ½* at²
where,
s is the distance coveredu is the initial velocity a is the acceleration t is the time takenWe know that the distance covered is 540 m and the final velocity is 72 m/s, so we can substitute these values into the equation to solve for the time taken.
540 = 0 * t + ½ * a * t²
540 = ½ * a * t²
1080 = a * t²
\(t^2= \frac{1080}{a}\)
\(t = \sqrt{ \frac{1080}{a}}\)
We know that the acceleration is the change in velocity divided by the time taken, so we can substitute this value into the equation to solve for the time taken.
\(t = \sqrt{\frac{1080 }{ 72 m/s}}\)
\(t = \sqrt{15} s\)
t = 3.9 s
Therefore, the time taken is t = 3.9 seconds
Which resources are unevenly distributed throughout Earth?
Select all that apply.
oil
soil
iron
oxygen
Answers
Answer:
Some natural resources like sunlight and wind are found everywhere, but other natural resources are unevenly distributed. Resources like oil, coal, and natural gas are only found where conditions were favorable to grow and preserve large quantities of animal or plant matter.
Explanation:
How does sweat and evaporation work a lot like a thermostat and furnace?
Answers
Answer:
how to get a now life
Explanation:
heheh
1. What was the immediate cause for the United States' entry into World
War II?
O The attack on Pearl Harbor by Japan
O The German invasion of Poland
O The formation of the Axis powers
O The rise to power of Adolf Hitler
Answers
The immediate cause for the United States' entry into World War II was the attack on Pearl Harbor by Japan on December 7, 1941.
What was World War II about?World War II was a global war that lasted from 1939 to 1945. It involved the majority of the world's nations, including all of the great powers, organized into two opposing military alliances: the Allies and the Axis.
Prior to this attack, the United States had maintained a policy of neutrality and had provided support to the Allies in the form of aid and supplies. However, the attack on Pearl Harbor, which resulted in the deaths of over 2,400 Americans, led to a declaration of war against Japan by the United States, and ultimately to the country's involvement in the larger global conflict.
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Please answer this question
Answers
Answer:
I'm not an expert at this, but I assume its mercury.
Which of the following aqueous solutions are good buffer systems?
(Select all that apply.)
a. 0.22 M acetic acid + 0.15 M potassium acetate
b. 0.27 M nitric acid + 0.16 M potassium nitrate
c. 0.29 M ammonium nitrate + 0.32 M ammonia
d. 0.20 M calcium hydroxide + 0.23 M calcium chloride
e. 0.31 M hydrofluoric acid + 0.22 M potassium fluoride
Answers
The following aqueous solutions represents good buffer systems:
0.22 M acetic acid + 0.15 M potassium acetate0.29 M ammonium nitrate + 0.32 M ammonia What is a buffer?A buffer is a solution used to stabilize the pH (acidity) of a liquid.
A good buffer system is generally known to contain close or equal concentrations of a weak acid and its conjugate base.
Based on the above explanation, the following represents a good buffer system as they are between their weak acid and conjugate base:
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What is the mass of a rectangular piece of copper 24.4cm x 11.4 cm x 7.9 cm? The density of copper is 8.92g/cm3.
Answers
The mass of the rectangular piece of copper is 18,869 g (approx).In conclusion, the mass of a rectangular piece of copper with dimensions 24.4cm x 11.4 cm x 7.9 cm and a density of 8.92 g/cm³ is 18,869 g (approx.).
The given dimensions of the rectangular piece of copper are:Length = 24.4 cmWidth = 11.4 cmHeight = 7.9 cmThe formula to calculate the mass of an object is given by;
Mass = Density x Volume
Here, the density of copper is given as 8.92 g/cm³.
Therefore, the first step is to calculate the volume of the rectangular piece of copper.The formula to calculate the volume of a rectangular object is given by:
Volume = Length x Width x Height
So,Volume = 24.4 cm x 11.4 cm x 7.9 cm= 2115.432 cm³Now we will use the mass formula:
Mass = Density x Volume= 8.92 g/cm³ x 2115.432 cm³= 18,869.27824 g= 18,869 g (approx.)
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definition of terms
Answers
Draw out the skeletal structure of cis-2-methylcyclohexano
Answers
The chemical structure of the compound is shown in the image attached.
How do you draw a chemical structure?Ascertain the molecule's atomic composition and the types of bonds (covalent, ionic, etc.) that each atom forms.
The skeletal structure, which is a straightforward illustration of the molecule's framework, should be drawn first. To do this, a series of lines are drawn to symbolize the atoms' bonds.
By positioning the atoms at the ends of the bond lines, you may complete the skeleton framework.
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Determine the volume in mL of 0.242 M NaOH(aq) needed to reach the equivalence (stoichiometric) point in the titration of 46.79 mL of 0.204 M propanoic acid(aq). The Ka of propanoic acid is 1.3 x 10-5.
Answers
The volume (in mL) of 0.242 M NaOH solution needed for the titration reaction is 39.44 mL
Balanced equationCH₃CH₂COOH + NaOH —> CH₃CH₂COONa + H₂O
From the balanced equation above,
The mole ratio of the acid, CH₃CH₂COOH (nA) = 1The mole ratio of the base, NaOH (nB) = 1How to determine the volume of NaOHVolume of acid, CH₃CH₂COOH (Va) = 46.79 mL Molarity of acid, CH₃CH₂COOH (Ma) = 0.204 MMolarity of base, NaOH (Mb) = 0.242 MVolume of base, KOH (Vb) =?MaVa / MbVb = nA / nB
(0.204 × 46.79) / (0.242 × Vb) = 1
Cross multiply
0.242 × Vb = 0.204 × 46.79
Divide both side by 0.242
Vb = (0.204 × 46.79) / 0.242
Vb = 39.44 mL
Thus, the volume of NaOH needed for the reaction is 39.44 mL
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O c.
Distance versus Time
300
250
200
Distance (km)
150
100
50
o
1
4
5
2 3
Time (h)
Answers
Answer:
Which statement best describes this kind of reproduction? A. Each parent passed all of its genes to every offspring. B. Only one parent is required to produce offspring. C. Each parent passes half of its genes to every offspring. D. All the offspring of a set of parents have identical genes.
Explanation:
This will help you through this.
12. Octane, a compound of hydrogen and carbon, has a molar mass of 114.26 g/mol. If one mole of the compound contains 18.17 g of hydrogen, what is its molecular formula?
Answers
This problem is providing information about the molar mass of octane, which is 114.26 g/mol and the mass of hydrogen that is in there, 18.17 g, it means we conclude that the molecular formula is C₈H₁₈ according to the following:
Molecular formulas:In chemistry, we define molecular formulas as those containing the types and number of atoms a compound has, according to the elements across the periodic table and the subscripts it has, standing for the number of each atom in the formula.
Calculation:In this case, we note that 18.17 g out of 114.26 g in one mole of octane is related to hydrogen, which means that the mass of carbon is 96.09 g in one mole of octane. Next, we divide the mass of each atom by the corresponding atomic mass in order to calculate the subscript in the formula:
\(H:\frac{18.17}{1.01}=18\\\\C:\frac{96.09}{12.01} =8\)
Therefore, the resulting formula is C₈H₁₈
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We can use thin layer chromatography to check if Starbuck coffee has caffeine.
True
False
Answers
Answer:
false?
Explanation:
In Part C of this lab, you will measure the mass, height and diameter of four cylinders composed of some unknown material. Calculate the
volume (in cm³) of a cylinder with a measured height of 11.76 cm and a diameter of 7.22 cm. Type your answer in decimal notation and
include units
Answers
The cylinder's volume is roughly 479.85 cm3 at a height of 11.76 cm and a diameter of 7.22 cm.
Is the diameter of a cylinder measured with a vernier caliper?With no zero error, the diameter of a cylinder can be measured with vernier calipers. The Vernier scale's zero is discovered to be between 5.10 cm and 5.15 cm on the main scale. The 50 divisions on the Vernier scale are comparable to 2.45 cm.
V = πr²h
where r is the cylinder's radius, h is its height, and is the mathematical constant pi (approximately equal to 3.14159).
We must first determine the cylinder's radius in order to compute the volume of the cylinder with a height of 11.76 cm and a diameter of 7.22 cm:
r = d/2 = 7.22 cm / 2 = 3.61 cm
Now that the parameters have been entered, we can compute the cylinder's volume:
V = π(3.61 cm)²(11.76 cm)
V = 479.85 cm³
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How to pass chem!!!!!!!!!!
Answers
Answer:
refer to below
Explanation:
- read your textbook! especially the topics that are most confusing
- as you read, make sure to take notes/make an outline. write the words from the text in your own words. In chem, the textbook explanations are usually very detailed, so putting it in your own words will help you remember and understand what you write.
- make sure you really understand the concepts. don't just memorize what you read.
- draw diagrams and structures. seeing how things are structured will help you visualize what you learn
- ask questions to your teacher. if there is anything confusing, make sure to refer to your teacher as they will hopefully be able to explain it so it won't be confusing
These tips have helped me pass chem with an A. Hope all of this helped!
Answer:
Explanation:
Study material, ask for help, read textbook and do practice problems, get a tutor, beg your teacher for marks,
1. Several solids, liquids, and gases can be found in your home. List three examples of each. (9 points) Think about where solids, liquids, and gases might be found in your refrigerator, bathroom, or basement/garage.
2. What states of matter exist within the human body? What state of matter do you think your body is mostly made up of? Why? (4 points) Think about whether the body contains solids, liquids, or gases. Which of the three would you be most likely to find?
3. Your blood contains many dissolved solids. What do you think could be done if you needed to remove the water from a sample of blood in order to study the solids that remained? (4 points) Think about what processes remove water from watery foods, solutions, or objects.
4. Your body contains a considerable amount of dissolved metal ions. Based on what you know about food and nutrition, list at least three metals you think could be found within the human body. (3 points) Refer to the periodic table — do any of the metal element names seem familiar? (Think about the ingredients list printed on food labels.)
Answers
1. Examples of solids, liquids, and gases found in a home
Solids: books, furniture, toys
Liquids: water, juice, shampoo
Gases: air, natural gas, propane
2. The human body contains solids, liquids, and gases. Solids include bones, muscles, and organs. Liquids include blood, saliva, and urine. Gases include air in the lungs and dissolved gases in the bloodstream. The body is mostly made up of liquids, as they make up a large percentage of its overall volume.
3. If you needed to remove the water from a sample of blood to study the solids that remained, you could use a process such as evaporation or freeze-drying. Evaporation involves heating the sample to allow the water to evaporate, leaving behind the solids. Freeze-drying involves freezing the sample and then removing the water under vacuum, leaving behind a dry solid.
4. Some metals that could be found within the human body include iron, zinc, and copper. These metals are commonly found in foods such as meat, seafood, nuts, and whole grains. Other metals such as calcium, magnesium, and potassium are also important for the body and are found in a variety of foods.
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