Identify the components, inputs, and outputs of your simple model system. Also identify the boundaries of the system.
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Related Questions
All atoms of uranium have the same.
1) Mass Number
2) Atomic Number
3) Number of Neutrons plus Protons
4) Number of Neutrons plus Electrons
Answers
All atoms of uranium have the same atomic number, which is 92. This means that every uranium atom has 92 protons in its nucleus.
The number of protons determines the element's identity, so all atoms of uranium have the same chemical properties.
The mass number of uranium, however, may vary between different isotopes. Uranium has two major isotopes, uranium-235 and uranium-238, which have 143 and 146 neutrons, respectively. The sum of protons and neutrons in the nucleus of an atom is called its mass number. Therefore, the mass number of uranium-235 is 235 (92 protons + 143 neutrons) and the mass number of uranium-238 is 238 (92 protons + 146 neutrons).
The number of neutrons plus electrons is not a commonly used term in describing atomic properties. The number of electrons in a neutral atom is equal to the number of protons, which is 92 in the case of uranium. However, the number of neutrons plus electrons may vary depending on the ionization state of the atom.
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What is the sum of the fractions 2/9+5/9
Answers
Answer:
7\9
Explanation:
please marl brainlieat
Zeke knows that there are several layers of sediment underneath his town. The top layer is soil, the next layer is clay, and the next layer is made up of gravel. He suspects that polluted water from a nearby mine is passing through one of these layers and making it into a local river. What could Zeke do to figure out how the polluted water might be moving from the mine to the river? A. He could build a model of the mine and test how deep it can go before it collapses. B. He could remove water from the mine and test it for certain pollutants. C. He could build a model of the soil layers and test if water passes through any of them. D. He could pour polluted water on the ground and test how long it takes for it to reach the river.
Answers
Answer:
He could add a model of soil layers.
Explanation: C
In an ecosystem where water from mine is polluting river it can be tested by building a model of the soil layers and test if water passes through any of them.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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what word best describes volume
Answers
Answer:
volume is the amount of space something occupies
Explanation:
Answer:The space an object takes up
Explanation:
what is the standard free energy (∆g°) of the reaction represented by the cell shorthand notation Pt | Fe²+ , Fe³+ || Ag+ | Ag
Answers
The standard free energy change for the reaction represented by the cell shorthand notation Pt | Fe²+ , Fe³+ || Ag+ | Ag is ΔG° = -3.88 kJ/mol.
The standard free energy (ΔG°) of a reaction is a measure of the energy change that occurs when the reaction is carried out at standard conditions, which are defined as 25°C and 1 atm pressure. The standard free energy change for a reaction is a measure of the tendency of the reaction to proceed spontaneously under these conditions.
The standard free energy change for the reaction represented by the cell shorthand notation Pt | Fe²+ , Fe³+ || Ag+ | Ag can be calculated using the following equation:
ΔG° = ΔH° + TΔS
To calculate the standard enthalpy change (ΔH°), we can use the standard Gibbs free energy change for the individual half-reactions that make up the cell reaction. The standard Gibbs free energy change for the reaction Fe²+ + e- → Fe³+ is -2.44 kJ/mol and the standard Gibbs free energy change for the reaction Ag+ + e- → Ag is -1.44 kJ/mol.
Therefore, the standard enthalpy change of the reaction is:
ΔH° = -2.44 kJ/mol - (-1.44 kJ/mol)
ΔH° = -3.88 kJ/mol
The standard entropy change for the reaction can be calculated using the standard entropy change for each of the half-reactions and the number of moles of each reactant and product involved in the reaction.
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What is the approximate radius of a 12 Cd nucleus? Express your answer to two significant figures and include the appropriate units.
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The approximate radius of a 12 Cd nucleus is 2.75 femtometers (fm).
The radius of a nucleus can be estimated using the empirical formula given below:
R = r₀ × A¹⁾³
R is the radius of the nucleus,
r₀ is a constant,
A is the mass number (the number of protons and neutrons) of the nucleus.
For a 12 Cd nucleus, A = 12 (the mass number of Cadmium).
The constant r₀ is approximately 1.2 femtometers (1.2 fm).
Now, substituting the values into the formula:
R = (1.2 fm) × (12)¹⁾³
R = 1.2 fm × 2.29
R = 2.75 fm
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. It is a beautiful sunny July day (temperature is 23.5 degrees Celsius) and you are
playing basketball. You are using a basketball that has a volume of 2.8 liters. Late that
night, the temperature drops to 9.2 degrees Celsius and you out to play basketball again.
EXPLAIN what will happen to ball and calculate its volume of the ball that evening (in
liters). (7 marks - 2 for the explanation and 5 for the calculation)
Answers
Answer:
go to the gogle you can fine your answer
Answer:
Tara ml ano name nyo add ko kayo elite na Kasi ako eh
What is chemistry the study of?
Answers
Respiration is measured in a human. How do the concentrations of o2 and co2 in inhaled air compare with exhaled air?.
Answers
Concentrations of O₂ and CO₂ in inhaled air compare with exhaled air when inhaled will have more oxygen and less carbon dioxide and when exhaled air have more carbon dioxide and less oxygen
Respiration is the act of respiring inhalation and exhalation of air and also called breathing and respiration also described as human take in oxygen and release carbon dioxide and this oxygen that is taken in by the cells is used for carrying various functions in the cell and is also used for deriving energy from the food and inhaled air is the oxygen rich and this air is important for the requirement of energy and exhaled air is the air that breath out which is waste air carbon dioxide which is not require for the body
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When 32. 3 g of magnesium nitride are used, what volume of ammonia gas will be collected at 405 k and 2. 33 atm
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19.9 L volume of ammonia gas will be collected at 405 k and 2. 33 atm.
How to calculate volume of ammonia gas?The vοlume οf ammοnia gas cοllected at 405 K and 2.33 atm, when 32.3 g οf magnesium nitride (Mg₃N₂) is used, is apprοximately 19.9 L.
Tο calculate the vοlume οf ammοnia gas, we need tο use the ideal gas law equatiοn:
PV = nRT
First, we need tο determine the number οf mοles οf magnesium nitride. The mοlar mass οf Mg₃N₂ is calculated as:
Mοlar mass οf Mg₃N₂ = (3 * atοmic mass οf Mg) + (2 * atοmic mass οf N)
Mοlar mass οf Mg₃N₂ = (3 * 24.31 g/mοl) + (2 * 14.01 g/mοl)
Mοlar mass οf Mg₃N₂ ≈ 100.94 g/mοl
Number οf mοles οf Mg₃N₂ = mass / mοlar mass
Number οf mοles οf Mg₃N₂ = 32.3 g / 100.94 g/mοl
Number οf mοles οf Mg₃N₂ ≈ 0.320 mοl
Nοw, we can use the ideal gas law equatiοn tο find the vοlume οf ammοnia gas:
V = (nRT) / P
V = (0.320 mοl * 0.0821 L·atm/(mοl·K) * 405 K) / 2.33 atm
V ≈ 19.9 L
Thus, 19.9 L volume of ammonia gas will be collected at 405 k and 2. 33 atm.
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which ion (cation or anion) remained the same between sodium sulfate and sodium chloride?
Answers
Answer:
Sodium (Na) is a cation, which means it has a positive charge.
Sodium forms ionic compounds with different anions, such as sulfate (SO4 2-) and chloride (Cl-).
In sodium sulfate (Na2SO4), sodium is still a cation with a charge of +1, while sulfate is an anion with a charge of -2.
In sodium chloride (NaCl), sodium is still a cation with a charge of +1, while chloride is an anion with a charge of -1.
Therefore, the cation that remained the same between sodium sulfate and sodium chloride is sodium (Na+).
Explanation:
Sodium (Na) is a cation, which means it has a positive charge.
Sodium forms ionic compounds with different anions, such as sulfate (SO4 2-) and chloride (Cl-).
In sodium sulfate (Na2SO4), sodium is still a cation with a charge of +1, while sulfate is an anion with a charge of -2.
In sodium chloride (NaCl), sodium is still a cation with a charge of +1, while chloride is an anion with a charge of -1.
Therefore, the cation that remained the same between sodium sulfate and sodium chloride is sodium (Na+). In chemistry, there are two types of ions: cations and anions.
Cations are ions that have a positive charge because they have lost one or more electrons. Anions are ions that have a negative charge because they have gained one or more electrons.
Sodium (Na) is a cation with a charge of +1, meaning it has lost one electron. In both sodium sulfate (Na2SO4) and sodium chloride (NaCl), sodium is still a cation with a charge of +1.
Therefore, the cation that remained the same between sodium sulfate and sodium chloride is sodium (Na+).
The cation (Na⁺) stayed the same in both cases, whereas the anions (SO₄²⁻ and Cl⁻) differed. The cation (Na+) remained the same in both cases, whereas the anions (SO₄²⁻ and Cl⁻) differed.
The ion that remained the same between sodium sulfate and sodium chloride is cation. An ion is an atom that has lost or gained one or more electrons. A positive ion is known as a cation since it has lost one or more electrons, whereas a negative ion is known as an anion since it has gained one or more electrons. The ions are crucial for the chemical reactions to occur and salt formation.
In sodium sulfate (Na2SO4), the sodium (Na) atom gives away two electrons to create Na+. In this example, the Na+ ion is formed, which is a cation. In sodium chloride (NaCl), the sodium (Na) atom gives away one electron to create Na+. In this example, the Na+ ion is also formed, which is a cation.
The cation (Na+) stayed the same in both cases, whereas the anions (SO₄²⁻ and Cl⁻) differed. As a result, the cation (Na+) remained the same in both cases, whereas the anions (SO₄²⁻ and Cl⁻) differed.
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During break time, you bought a magnum ice cream to your crush to show your gratitude in helping her during the previous activity. You bought a pair of magnum even though you don't have enough money. Thanks to your best friend who is always there to support you in times of need. As you approach her with confidence, you saw her talking to the person you saw last time in the canteen. As you turned around and leave, she called you. You have no choice but to confront her even though you feel that your heart is filled with sorrow. Then suddenly she introduced her brother. Your face turns to read with delight and also wonder? You told her that you didn't see her brother in IG, YT,FB or even tweeter. (such amazing stalker you are) then she told you the whole story to the point that you forgot to give the magnum ice cream that melted for some times in your hand. What phase change is being undergone as the magnum ice cream melt?
Answers
Answer:
Solid---> Liquid
A solution of NaCl was prepared in the following manner: 0.0842 g of NaCl is massed out on an analytical balance. The solid is transferred to a 25.00 mL volumetric flask. Deionized water is added to the flask such that the bottom of the meniscus is at the line. A 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask using a volumetric pipet and diluted to volume. 6. Calculate the concentration of NaCl in the resulting solution in mg/L NaCl. (answer = 67.4 mg/L) 7. Calculate the concentration of NaCl in the resulting solution using propagation of error through the calculation. Use the manufacturer's tolerance values as the absolute error. The tolerances can be found in Chapter 2 of the Harris text. Assume a Class 1 balance and Class A glassware. Treat the tolerances as random error. (answer = 67.4+0.4 mg/L) 8. Identify 2 possible sources of random (indeterminate) error. Identify 2 possible sourses of systematic (determinate) error.
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Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl
To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7. Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.
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How many atoms are in Na2SiO3
Answers
Answer:
6.
Explanation:
2 sodium
1 silicon
3 oxygen
--------------
6 atoms
Calculate the ionization constant of each reaction. hcl (aq) + h2o (l) equation h3o+ (aq) + cl- (aq); [hcl] = 16.9m, [h3o+] = 13.3m, [cl-] = 7.4mka =
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The ionization constant from the reaction as shown in the calculation is 5.8.
What is the ionization constant?The term ionization constant refers to the extent to which the acid is ionized in solution. It is calculated from;
Ka = [H3O^+] [Cl]/[HCl]
Thus when we substitute the values;
Ka = 13.3 * 7.4/ 16.9
Ka = 5.8
The ionization constant from the reaction as shown in the calculation is 5.8.
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The list below includes some of the properties of butane, a common fuel. Identify the chemical properties in the list. Check all of the boxes that apply.
denser than water
burns readily in air
boiling point of –1.1°C
odorless
does not react with water
Answers
Answer:
Answer above is incorrect
Explanation:
The true answers are B and E on Edge 2020
Hope this helps :)
Answer:
B and E
Explanation:
on edge hope this helps
(0)
The timing and size of production quantities for each product in the product family is specified by the:
a) scheudling plan
b) material requirements plan
c) resource plan
d) master production schedule
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The timing and size of production quantities for each product in the product family are specified by the Master Production Schedule (MPS). The MPS serves as a comprehensive plan that outlines the production requirements and schedules for the entire product family.
It takes into account various factors such as customer demand, production capacity, lead times, and inventory levels.The MPS is typically created based on inputs from the sales and operations planning process, where demand forecasts and production capabilities are assessed. It translates the sales forecasts into specific production quantities and schedules for each product within the product family.
By considering factors like lead times and available resources, the MPS helps determine when and how much of each product should be produced to meet customer demand while optimizing production efficiency.The MPS serves as a crucial link between the sales forecasts and the execution of production activities.
It provides guidance to the scheduling plan, material requirements plan, and resource plan, enabling coordination and alignment across these different aspects of production planning. Ultimately, the MPS plays a pivotal role in ensuring that the right products are produced in the right quantities and at the right time to fulfill customer orders and maintain efficient operations.
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A bus traveled 280 kilometers between two cities . It left the first city at 3:00 p.m. and arrived at the second city at 7:00 p.m. What was the average speed of the bus during the trip ?
Answers
Answer:
70 kilometers per hour
Explanation:
280 kilometers ÷ 4 hours (7:00 pm - 3:00 pm = 4 hours) = 70 kilometers per hour
Hope this helps! Sorry if wrong. You are loved and you are beautiful/handsome!
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How many coulombs are required to produce 49 g of potassium metal from a sample of molten potassium chloride?
Use scientific (E) notation with 2 numbers after the decimal point.
Answers
The amount of charge required to produce a certain amount of a metal during an electrolysis process is determined by Faraday's laws of electrolysis.
The first law states that the amount of a substance produced at an electrode during electrolysis is proportional to the amount of charge passed through the electrode. The constant of proportionality is called the Faraday constant, F, and its value is:
F = 96,485.3329 C/mol
This means that to produce one mole of a metal, a charge of 96,485.3329 Coulombs is required.
To determine the amount of charge required to produce 49 g of potassium metal, we need to first calculate the number of moles of potassium in 49 g. The molar mass of potassium is 39.10 g/mol, so:
moles of K = 49 g / 39.10 g/mol = 1.253 mol
Now we can use Faraday's law to calculate the amount of charge required:
charge = moles of K × F
= 1.253 mol × 96,485.3329 C/mol
= 1.210×10^5 C (in scientific notation with 2 numbers after the decimal point)
Therefore, the amount of charge required to produce 49 g of potassium metal is approximately 1.210×10^5 Coulombs.
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Pick an answer and explain why the others are incorrect.
Answers
The name of this compound using IUPAC rules is 3,4-dimethylhexane.
Option D is correct.
What are IUPAC rules?the IUPAC nomenclature of organic chemistry is described as a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry.
Option A, 2,3-diethylbutane, is incorrect because it has a different carbon chain length and different substituent positions.
Option B, 2-ethyl-3-methylpentane, is incorrect because it has a different carbon chain length and one of the substituents is incorrectly placed.
Option C, 3-methyl-4-ethylpentane, is incorrect because it has a different carbon chain length and the substituent positions are reversed.
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1. 4.5 cm = __________ Km
2. 34⁰C = __________ Kelvin
3. 195kg = __________ lb
7. 108⁰F =__________ ⁰C
8. 63.2 m =__________ mm
if you can solve this for me I'd gladly appreciate it
Answers
Answer:
1. 0.000045km
2. 307.15 Kelvin
3. 429.9014lb
7. 42.22222 celcius
8. 63200 mm
Which of the following best describes electroplating?
A Forcing a nonspontaneous reaction
B. Depositing one metal on another
c
C Tuming a metal Jions
D. Reversing the flow of electrons
Answers
Answer:
The answer is Depositing one metal on another
Explanation:
Depositing one metal on another best describes electroplating. Hence, option B is correct.
What is electroplating?"Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode."
An electroplating process is the electroplating of copper in which the metal to be plated (copper) is used as the anode, and the electrolyte solution contains the ion of the metal to be plated (Cu2+). Copper in the solution at the anode and is plated at the cathode.
Electroplating is primarily used to change the physical properties of the materials. This process can be used to give materials increased wear resistance, corrosion protection or aesthetic appeal, as well as increased thickness.
Hence, depositing one metal on another best describes electroplating.
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What is the pressure in millimeters of mercury inside a container of gas.
Answers
What mass of Barium Nitride can be theoretically produced?
Answers
Answer:
151.33 g/mol
Explanation:
TRUST ME -_-
Explain how nutrient cycles connect past, present, and future life.
Answers
Answer:
the nitrogen cycle
Explanation:
Which of the following is a synthesis reaction?
AgNO3 + NaCl → AgCl + NaNO3
CH4 + O2 → CO2 + H2O
SO3 + H2O → H2SO4
Cu + AgNO3 → Ag + CuNO3
Answers
Synthesis reaction
It is a reaction in which 2 or more reactants combine with each other to form one product .
Check option C
Sulphate and water are combining to form sulfuric acid .
Hence option C is correct
Answer:
SO3 + H2O => H2SO4
Explanation:
I took the test :)
Select the correct answer from each drop-down menu. When a car is parked in hot sunlight, the temperature of the car’s seats ____ and the thermal energy of the seats _____
Answers
The radiation of the Sun heats the air trapped inside the car which eventually heats everything inside the car including the seats of the car.Sep 10, 2020
(The words in caps are your answer) :)
Answer:
When a car is parked in hot sunlight, the temperature of the car’s seats
increases and the thermal energy of the seats increases .
Explanation:
Under what conditions can lithium bromide conduct electricity?
only when dissolved
only when melted
only when it is in crystal form only when melted or dissolved in water
Answers
Answer:
D
Explanation:
Only when melted is correct
Only when crystal is wrong
Only when dissolved in water is correct
Only when melted or dissolved in water is wrong
I hope this helps you :)
What can be used to measure molecular polarity?
a. x-rays
b. electron microscope
c. electric field
d. infrared light
Answers
Infrared light can be used to measure molecular polarity. Therefore, the correct option is option D.
A molecule or its chemical groups have an electric dipole moment with a negatively charged end and a positively charged end when they are polar, which in chemistry is the separation of electric charge. Because the bonded atoms' electronegativity differs, polar compounds must have one or more polar bonds. If the bond dipoles cancel one other out via symmetry, molecules with polar bonds are not polar. Infrared light can be used to measure molecular polarity. Dipole-dipole intermolecular forces and hydrogen bonding are how polar molecules communicate with one another. Many physical characteristics, including as surface tension, solubility, and melting and boiling points, are based on polarity.
Therefore, the correct option is option D.
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calculate how many kcals would be in a meal that contains 19 grams of fat, 39 grams of carbohydrate, and 16 grams of protein. 391 220 171 433
Answers
220 Calories would be in a meal that contains 19 grams of fat, 39 grams of carbohydrate, and 16 grams of protein.
calories are units of measurement for the amount of calories in a beverage or food. When we take in more calories than we burn, our carcasses store the excess as fat. If this persists, we may gain weight over time. To maintain a healthy weight, an average man requires approximately 2,500kcal (10,500kJ) per day. Calories are the units of energy is released by your body whenever it digests as well as absorbs food. The higher the calorie content of a food, the more power it can supply to your body. When you take in more calories than you require, your body will store the surplus calories as fat.
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