Both cohesion and adhesion involve the attraction between molecules, cohesion refers to the attraction between molecules of the same substance, while adhesion refers to the attraction between molecules of different substances.
Comparison of the two properties are: Definition: Cohesion refers to the attraction between molecules of the same substance, while adhesion refers to the attraction between molecules of different substances.
Forces involved: Cohesion involves intermolecular forces (such as hydrogen bonding) that hold the molecules of the same substance together. Adhesion involves the forces of attraction between two different substances, such as the attraction between water molecules and the surface of a glass.
Surface tension: Cohesion contributes to the surface tension of a liquid, which is the property that allows some insects to walk on water without sinking. Adhesion also contributes to the surface tension, as it causes the liquid to adhere to the surface.
Applications: Cohesion is important in determining the physical properties of liquids, such as their viscosity and boiling point. Adhesion is important in many practical applications, such as adhesives and coatings that need to stick to different surfaces.
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Balance the Chemical equation to solve. How many Grams of Water(H2O) can be produced with 5 moles of Oxygen (O2) with an excess of Hydrogen.
5 moles of oxygen reacting with excess hydrogen will produce 180.15 g of water.
What is hard water?Hard water contains high levels of dissolved minerals, primarily calcium and magnesium ions. Water picks these minerals up as they pass through rocks, soil, and other natural materials.
Which is mostly used in chemical reactions- hard water or soft water?Soft water is generally preferred for chemical reactions because it does not contain highly dissolved minerals. Hard water, however, can react with certain chemicals and interfere with the desired chemical reactions.
The balanced chemical equation for the reaction between oxygen and hydrogen to form water is 2H2 + O2 -> 2H2O.
The molar mass of water (H2O) is estimated to be 18.015 g/mol. Therefore, the mass of 10 moles of water will be 10 mol x 18.015 g/mol = 180.15 g
Therefore, 5 moles of oxygen reacting with excess hydrogen will produce 180.15 g of water.
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a piece of silver of mass 362 g has a heat capacity at constant pressure of 85.7 j / 0c. what is the molar heat capacity at constant pressure of silver?
Silver has a 0.235 J/g°C specific heat.
The amount of energy needed to raise the temperature of a given mass of a substance by a certain quantity is measured by the substance's specific heat. In this issue, we are required to determine a piece of silver's specific heat given its mass and heat capacity.
According to the equation
specific heat = heat capacity/mass
specific heat = 85.7 J/°C / 362 g
Thus, 0.235 joules of energy are required to raise the temperature of 1 gm of silver by 1 degree Celsius. The thermal characteristics and behavior of a substance are significantly influenced by its specific heat.
Complete question:
A piece of silver of mass 362 g has a heat capacity of 85.7 J/°C. What is the specific heat of silver?
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Select the statement that best describes the concept of fossil succession.
Choose one:
A. There is a definite relative order in which certain, but not all, fossil species occur within the layers of rock on Earth.
B. As you go up in stratigraphy, fossils are older.
C. Fossils are randomly distributed throughout the rock record, and the succession through geologic time is irregular.
D. There is a definite relative order in which each fossil species occurs within the layers of rock on Earth.
The statement that best describes the concept of fossil succession is A. There is a definite relative order in which certain, but not all, fossil species occur within the layers of rock on Earth.
Fossil succession refers to the idea that different types of fossils are found in different layers of rock in a predictable sequence, and that the sequence can be used to determine the relative ages of the rocks. The principle of fossil succession is based on the observation that certain groups of organisms existed only during specific time periods, and that these organisms left behind distinctive fossils that can be used to identify the relative age of the rock layer in which they are found.
It is important to note that not all fossil species occur in every layer of rock, and some layers of rock may not contain any fossils at all. Additionally, the sequence of fossils may not always be perfect due to factors such as erosion or local geological events, but in general, the principle of fossil succession is a reliable way to determine the relative ages of rocks.
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Rank these elements from largest to smallest atomic radius Neon, Lithium, potassium, radon, helium, nitrogen, Praseodymium, aluminum
From largest to smallest atomic radius:
Francium>Cesium>Rubidium>Potassium>Sodium>Lithium>Calcium> Strontium>Barium>Aluminum>Praseodymium>Neon>Helium>Argon> Krypton>Xenon>Radon>Nitrogen.
What is the trend of atomic radii in a period?The trend of atomic radii in a period (horizontal row) of the periodic table is generally a decrease from left to right. This is due to an increase in the effective nuclear charge, which is the positive charge felt by the outermost electrons in the atom. As the atomic number increases across a period, the number of protons in the nucleus increases, which increases the effective nuclear charge. This stronger attraction between the positively charged nucleus and the negatively charged electrons causes the atomic radius to decrease.
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Why does an aerial firework require two explosions of black powder?
The fireworks are set off by the first explosion, and the stars are ignited and dispersed over the sky by the second explosion.
What do you mean by the term an explosion ?An explosion is a sudden increase in volume accompanied by a tremendous energy release that typically results in the production of high temperatures and the discharge of high-pressure gases.
Black powder has to explode twice for an aerial firework to perform correctly.
The effectiveness of the firework as a whole depends on the precise timing and positioning of each explosion as well as the usage of particular chemicals in the effect charge.
Thus, an aerial firework requires two explosions of black powder because the firework is set off by the first explosion, and the intended visual effects are produced by the second explosion.
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What mass of mgF2 is needed to produce 1. 4 mol of liF
To produce 1.4 mol of LiF, we need 0.7 mol of MgF2. This corresponds to a mass of 43.6 grams of MgF2, based on the molar mass of MgF2.
Summary of Calculations for Producing LiF with MgF2.We're given that we need to produce 1.4 mol of LiF, and we're asked to find out how much MgF2 is needed for this reaction. We can start by writing out the balanced chemical equation for the reaction:
MgF2 + 2 LiF → 2 LiF + MgF2
From this equation, we can see that 1 mol of MgF2 reacts with 2 mol of LiF to produce 1 mol of MgF2 and 2 mol of LiF. This means that the stoichiometry of the reaction is 1:2 for MgF2 and LiF. In other words, for every 1 mol of MgF2 that reacts, 2 mol of LiF is produced.
So, if we want to produce 1.4 mol of LiF, we need to use stoichiometry to figure out how much MgF2 we need. We can use a conversion factor that relates the number of moles of LiF to the number of moles of MgF2:
1.4 mol LiF × (1 mol MgF2 / 2 mol LiF) = 0.7 mol MgF2
This tells us that we need 0.7 mol of MgF2 to produce 1.4 mol of LiF.
To convert from moles to grams, we can use the molar mass of MgF2, which is 62.3 g/mol. Multiplying the number of moles by the molar mass gives us the mass of MgF2 needed:
0.7 mol MgF2 × 62.3 g/mol MgF2 = 43.6 g MgF2
Therefore, we need 43.6 grams of MgF2 to produce 1.4 mol of LiF.
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what is the product when acetone is reacted with methylmagensium chloride, followed by aqueous workup?
A typical Grignard reaction is the interaction between acetone and methyl magnesium chloride (MeMgCl). A Grignard reagent (in this example, MeMgCl) is added to the carbonyl group of acetone in this reaction, following which the product is extracted through an aqueous workup.
Here's how the overall response can be communicated: MeMgCl + CH3COCH3 CH3CHOHCH3MgCl In this reaction, the carbonyl carbon of the acetone reacts with the methyl group of the MeMgCl reagent to generate an intermediate alkoxide. In the presence of aqueous acid, this intermediate is eventually oxidized to generate the final product, 2-propanol (also known as isopropyl alcohol), and magnesium chloride:
CH3CHOHCH3OH + MgCl2 = CH3CHOHCH3MgCl + H2O Hence, 2-propanol and magnesium chloride are the final products of the reaction between acetone and MeMgCl, followed by an aqueous workup.
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A balloon has a pressure of 56mmHg and is 1.5 L in volume. If the balloon is forced to fill a volume of 0.56L, what is the pressure of the ballon (in atm)? Assume constant temp. (Boyle's Law). 15 points pls help
What are the reasons for washing a precipitate in gravimetric analysis?
Washing the precipitate is important for ensuring the accuracy and precision of the gravimetric analysis.
Gravimetric analysis is a quantitative analytical method that involves the determination of the mass of a substance of interest through precipitation, filtration, washing, and drying. Washing a precipitate is an important step in this process and is done for several reasons, including:
To remove any impurities: During the precipitation step, other substances may also be present in the solution that can become trapped in the precipitate. Washing the precipitate removes these impurities and ensures that the measured mass accurately reflects the substance of interest.
To remove any excess reagents: After precipitation, there may be excess reagents that were used to initiate the reaction. If these reagents are not removed, they can affect the mass of the precipitate and thus affect the accuracy of the measurement.
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What is the longest exothermic reaction?
Answer:intermetallic and thermite reactions.
Explanation:
.
Which choice describes climate?
Responses
The U. S. Gulf coast typically has warm, wet weather and tropical storms during the summer and fall. The U. S. Gulf coast typically has warm, wet weather and tropical storms during the summer and fall. The U. S. Gulf coast was hit by Hurricane Katrina in 2005 and suffered extensive damage. The U. S. Gulf coast was hit by Hurricane Katrina in 2005 and suffered extensive damage. In March 1971, Canada was hit by a major blizzard and up to 32 inches of snow fell. In March 1971, Canada was hit by a major blizzard and up to 32 inches of snow fell. An extremely dangerous tornado hit Jarrell, Texas in 1997 destroying 40 homes
The Gulf region, which is in the wet-dry tropics (savanna), experiences year-round temperatures of hot to very hot.
Looking at average temperatures and precipitation through time is the easiest way to characterize a climate. The amount and type of precipitation, sunshine hours, typical wind directions and speeds, the number of days above freezing, weather extremes, and the geography of the area are additional factors that can be used to describe climate. The Northwest Coastal, High Plains, Midwest, Mid-Atlantic, Southeast, South, and Southwest are the seven principal climate regions of the United States. As a result of the fact that these states have similar weather patterns throughout the year, they are included in each climate zone for the United States.
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You make a solution of a nonvolatile solute with a liquid solvent. Indicate if each of the following statements is true or false. (a) The freezing point of the solution is unchanged by addition of the solvent.
False. The addition of a solute to a solvent typically lowers the freezing point of the solution compared to the freezing point of the pure solvent.
This is due to the fact that the solute particles interfere with the arrangement of the solvent particles, which makes it more difficult for the solution to freeze. As a result, the solution has to be cooled to a lower temperature in order for it to freeze, which results in a lower freezing point compared to the pure solvent. Freezing point depression is a colligative property, which means that it depends on the concentration of solute particles in the solution, rather than on their chemical nature. When a non volatile solute (a solute that does not evaporate at room temperature) is dissolved in a solvent, it increases the number of solute particles in the solution. These solute particles interfere with the arrangement of the solvent particles, making it more difficult for the solvent to freeze. As a result, the solution has to be cooled to a lower temperature in order for it to freeze, which results in a lower freezing point compared to the pure solvent. To summarize, the addition of a non volatile solute to a solvent typically lowers the freezing point of the solution, and therefore the statement "The freezing point of the solution is unchanged by the addition of the solvent" is false.
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03 which type of silicate has the greatest proportion of oxygen atoms shared by pairs of adjacent tetrahedra
The most oxygen atoms shared by pairs of neighbouring tetrahedra are found in double chain silicates, which is the most common kind of silicate.
This particular silicate consists of silicon atoms bound to other silicon atoms in a chain with oxygen atoms, with oxygen atoms forming the corners of the tetrahedra. As compared to other forms of silicates, these chains share oxygen atoms with neighbouring chains, leading to a higher percentage of oxygen atoms shared by pairs of adjacent tetrahedra. Due to the lack of connectedness between their tetrahedral units, other silicate types, such as sheet silicates and framework silicates, have a lower percentage of oxygen atoms shared by pairs of neighbouring tetrahedra. Because of this, double chain silicates have a tendency to be more dense and structurally complicated than other silicate kinds.
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a prescription for chad calls for triamcinolone injectable suspension 10mg/ml to be diluted down to 0.125 mg/ml by adding distilled water. how much triamcinolone suspension and how much water must be added to make 480ml of the final product?
To dilute the triamcinolone injectable suspension from 10mg/ml to 0.125 mg/ml, we need to dilute it 80 times (since 10 ÷ 0.125 = 80). This means that we need to add 1 part of the 10mg/ml suspension to 79 parts of distilled water.
To calculate how much of each we need, we can use the following formula:
C1V1 = C2V2
where C1 is the initial concentration (10mg/ml), V1 is the initial volume (unknown), C2 is the final concentration (0.125mg/ml), and V2 is the final volume (480ml).
First, we can solve for V1:
C1V1 = C2V2
10mg/ml x V1 = 0.125mg/ml x 480ml
V1 = (0.125mg/ml x 480ml) / 10mg/ml
V1 = 6ml
So we need 6ml of the 10mg/ml triamcinolone injectable suspension.
Next, we can calculate how much distilled water we need to add:
Total volume - volume of triamcinolone suspension = volume of distilled water
480ml - 6ml = 474ml
Therefore, we need to add 6ml of the 10mg/ml triamcinolone injectable suspension and 474ml of distilled water to make 480ml of the final product with a concentration of 0.125mg/ml.
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the combustion of a hydrocarbon sample produced 0.1783 g of co2 and 0.0734 g of h2o. determine the empirical formula of the compound.
The empirical formula of the compound is CH2O.
The empirical formula of a compound is determined by dividing the mass of each element by its molar mass and then simplifying the resulting ratio to the smallest whole-number ratio.
The molar mass of CO2 is 44.01 g/mol.
Therefore, 0.1783 g of CO2 would be equivalent to 0.0040 mol CO2.
For H2O, the molar mass is 18.02 g/mol.
Therefore, 0.0734 g of H2O would be equivalent to 0.0041 mol H2O.
Therefore, the ratio of the elements would be 0.0040 mol CO2: 0.0041 mol H2O.
Simplifying this ratio to whole numbers yields 1 mol CO2: 1 mol H2O.
As a result, CH2O serves as the compound's empirical formula.
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Imagine it's a cold winter night; you've turned the heater on to get toasty and warm. You open the door for a moment and someone yells to close it and says "you're letting the cold in!" Is this statement true or false? i need a paragraph explaining why and evidence.
The statement "you're letting the cold in" is technically false. When you open a door on a cold winter night, you are allowing the warm air inside to escape, which can cause a drop in temperature. However, you are not necessarily "letting the cold in." The cold air is already present outside, and it will continue to exist whether the door is open or closed. In fact, the temperature inside your home may only change slightly, and it will depend on many factors such as the size of the room, the amount of insulation, and the efficiency of the heating system.
The concept of heat transfer, which is the movement of heat from one place to another, helps explain why this statement is false. When you open the door, the warm air inside will move to the cold air outside, which is known as conduction. This transfer of heat will cause the temperature inside to drop until the heat source can warm up the air again. This process will continue as long as the door remains open. So, while opening the door on a cold winter night can cause a drop in temperature, it is not because you are "letting the cold in." Instead, it is because you are allowing the warm air inside to escape.
how do you separate and recover the basic compound from a mixture containing an acidic compound and a neutral compound?
Separation of materials according to their acidic- basic properties is known as acid-base extraction method. This is commonly used in separating organic compounds.
Here we have to separate a basic compound from a mixture containing acidic, basic and neutral compounds. Usually these are dissolved in organic solvents. Basic compounds usually accepts protons from a strong acid. So a strong acid like HCl is used to provide protons. The bases reacts with the acids and ionic compounds are formed. But the acidic and neutral compounds do not react.
The ionic compounds are ionized and readily dissolved in water. We are adding aqueous solutions of acid. So while shaking vigorously, the basic compound, which is ionized dissolves in water layer. Unionized acidic and neutral compounds remains in organic solvent layer. The water layer and organic solvent layer separates according to density. We extract the basic compound along with water.
So acid-base extraction method is used here.
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the 2,4-hexadienol and the maleic anhydride were readily observed using the uv light. explain why the product was only clearly observed after iodine staining (see example in diels-alder module on canvas).
The 2,4-hexadienol and the maleic anhydride were readily observed using the uv light, the product was only clearly observed after iodine staining as they were unsaturated products.
The 2,4-hexadienol and the maleic anhydride were readily observed using the uv light, the product was only clearly observed after iodine staining because as we know when product comes in contact with the iodine vapors, it reacts with the compounds and forms yellowish brown spots which can be easily seen.
Due to iodine, it forms complex with many organic compounds. we know iodine has affinity for both unsaturated and aromatic compounds, therefore both of them given compounds are unsaturated organic compounds along with the product.
Thats why, we know that when the 2,4-hexadienol and the maleic anhydride were readily observed using the uv light, the product was only clearly observed after iodine staining as they were unsaturated products.
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Do you or anyone you know follow more than one calendar system? Which ones?
Some people do follow more than one calendar system to know some particular days, month or something based on their rituals and religions.
What is world accepted calendar system ?The world accepted calendar system is Christian calendar. There are different calendar systems in use in the present era such as Chinese calendar, Ethiopian calendar, Jewish calendar etc.
Each calendars have their own peculiarities in use and in the determination of days, months or the identifying any special day. There are some people using more than one calendar system.
For example, some are using religious calendars such as 'hijra ', 'Saka Varsha ' etc. to know some special days based on their cultural rituals.
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PLEASE ANSWERRRR I need to know the correct answer and how to get it step by step
The wavelength of the single photon of UV-A electromagnetic radiation is 3.2×10⁻⁵ cm (2nd option)
How do I determine the wavelength of the single photon of UV-A?We'll begin by obtaining the frequency of the single photon of UV-A. Details below:
Energy (E) = 6.2×10⁻¹⁹ JPlanck's constant (h) = 6.626×10⁻³⁴ JsFrequency (f) =?Energy (E) = Planck's constant (h) × frequency (f)
E = hf
6.2×10⁻¹⁹ = 6.626×10⁻³⁴ × f
Divide both sides by 6.626×10⁻³⁴
f = 6.2×10⁻¹⁹ / 6.626×10⁻³⁴
f = 9.36×10¹⁴ Hz
Finally, we shall determine the wavelength of the single photon of UV-A. Details below:
Frequency (f) = 9.36×10¹⁴ Hz Speed of wave (v) = 3×10⁸ m/sWavelength (λ) = ?Velocity (v) = wavelength (λ) × frequency (f)
3×10⁸ = wavelength × 9.36×10¹⁴
Divide both sides by 9.36×10¹⁴
λ = 3×10⁸ / 9.36×10¹⁴
λ = 3.2×10⁻⁷ m
Multiply by 100 to express in meter (m)
λ = 3.2×10⁻⁷ × 100
λ = 3.2×10⁻⁵ cm
Thus, the wavelength is 3.2×10⁻⁵ cm (2nd option)
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which process requires more energy: completely vaporizing 1 kg of saturated liquid water at 1 atm pressure of completely vaporizing 1 kg of saturated water at 8 atm pressure? explain by using the property table.
The process requires more energy: is completely vaporizing 1 kg of saturated liquid water at 1 atm pressure.
The The process requires more energy: is completely vaporizing 1 kg of saturated liquid water at 1 atm pressure. This is because from the latent heat of vaporization of the each system. For the system 1, saturated the water at 1 atm, the latent heat of vaporization is equal to 40.7 kJ per mole and for, at 8 atm, the latent heat of vaporization is equal to 36.4 kJ per mole.
Thus, the completely vaporizing 1 kg of saturated liquid water at 1 atm pressure requires the more energy.
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suppose that ch4(g) reacts completely with o2(g) to form co2(g) and h2o(g) with a total pressure of 1.2 torr. what is the partial pressure of h2o(g)? mcat
H2O has a partial pressure of 0.6 Torr.
To solve this problem, we need to use the balanced chemical equation for the reaction between CH4 and O2:
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
According to the stoichiometry of this reaction, every mole of CH4 that reacts produces 2 moles of H2O. Therefore, the partial pressure of H2O can be calculated as follows:
Calculate the moles of CO2 produced: Since the reaction is complete, all the CH4 has reacted, and the pressure of CO2 is equal to the total pressure. The balanced equation tells us that 1 mole of CH4 produces 1 mole of CO2, so the moles of CO2 are equal to the moles of CH4 that reacted.
Calculate the moles of H2O produced: Since the balanced equation tells us that 1 mole of CH4 produces 2 moles of H2O, the number of moles of H2O produced is twice the number of moles of CH4 that reacted.
Calculate the partial pressure of H2O: The partial pressure of H2O is proportional to the number of moles of H2O produced. Therefore, we can use the ideal gas law to calculate the partial pressure of H2O:
PV = n Rt
where P is the partial pressure of H2O, V is the total volume of the gases, n is the number of moles of H2O, R is the ideal gas constant, and T is the temperature. Since we know the total pressure (1.2 Torr), we can use this to calculate the partial pressure of H2O as follows:
P(H2O) = n(H2O)RT / V = (2n(CH4)RT / V) = 2P(CO2)
where P(CO2) is the total pressure of CO2, which we found to be equal to the total pressure of the mixture.
=0.6 Torr(half of total pressure).
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draw the structure of cis−jasmone, a natural product isolated from jasmine flowers, formed by treatment of alkyne a with h2 in the presence of the lindlar catalyst. click the draw structure button to launch the drawing utility.
Cis-jasmone is a natural product with a molecular formula of C11H16O. It has a cyclopentenone ring and an unsaturated side chain with a cis double bond. The structure of cis-jasmone can be drawn as follows:
H
|
H--C--O
| |
H--C--C--C--CH3
| | |
H H--C=C
|
H
The synthesis of cis-jasmone from alkyne A using H2 in the presence of the Lindlar catalyst involves the hydrogenation of the alkyne to form a cis-alkene, followed by cyclization to form the cyclopentenone ring.
Cis-jasmone is a natural organic compound with the molecular formula C11H16O. It has a cyclopentenone ring and an unsaturated side chain with a cis double bond. Cis-jasmone is a fragrant compound that is responsible for the characteristic aroma of jasmine flowers. It is used in perfumes and as a flavoring agent in the food industry.
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Given 6. 000 moles of aluminum (Al ) , how many grams of aluminum oxide (Al 2O 3) will be produced?
56.7 grams of aluminum oxide (Al2O3) are produced from 6. 000 moles of aluminum (Al ).
To solve this problem, we need to use the balanced chemical equation for the reaction between aluminum and oxygen to form aluminum oxide:
4 Al + 3 O2 → 2 Al2O3 From this equation, we can see that for every 4 moles of aluminum that react, 2 moles of aluminum oxide are produced. Therefore, we can use the following stoichiometric calculation to find the mass of aluminum oxide produced: 6.000 moles Al * (2 moles Al2O3 / 4 moles Al) * (101.96 g Al2O3 / 1 mole Al2O3) = 305.84 g Al2O3 So, 6.000 moles of aluminum will produce 305.84 grams of aluminum oxide.
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Write the formula for nitrogenfluride?
Answer:
The formula for nitrogen fluoride is NF3.
Explanation:
Answer:
The chemical formula for nitrogen fluoride is NF3.Explanation:
One nitrogen atom and three fluorine atoms make up this poisonous and extremely reactive chemical. It is used to make fertilisers, refrigerants, and semiconductors.
Hope it helps! : )hot water is placed into an insulated thermos and sealed. the thermos is shaken vigorously and then stopped. what would the energy balance look like for this process? note. assume the system is the hot water
Hot water is placed into an insulated thermos and sealed. the thermos is shaken vigorously and then stopped. Then, the energy balance look like for this process is Isolated System and Adiabatic System.
Isolated System:
A system that does not interact with its environment. Depending on the circumstances, this can mean total energy and/or momentum remaining constant. In thermodynamics, dissociation is commonly used to indicate that the energy of a system is invariant. In mechanics, it is used to indicate that the momentum of a system does not change.
The thermos is the best example of an isolated system. Thermoses are used to keep things cold or hot. Therefore, the thermos does not allow energy transfer.
Adiabatic System:
A process in which there is no heat transfer to or from a system, such that Q = 0, is called adiabatic and such a system is said to be adiabatically isolated. A simplified assumption is often made that the process is adiabatic. For example, suppose that gas compression occurs so rapidly in an engine cylinder that a small fraction of the system's energy can be transferred to the environment as heat on the time scale of the compression process. Despite the fact that the cylinder is not insulated and highly conductive, this process is idealized as adiabatic. The same goes for the process of expanding such a system.
Complete Question:
Hot water is placed into an insulated thermos and sealed. the thermos is shaken vigorously and then stopped. what would the energy balance look like for this process? note. assume the system is the hot water.
A. Isolated system
B. Open system
C. Closed system
D. Adiabatic system
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Water and sand are being separated by filtration. What physical change is used?
Felting is a physical procedure. The mixture of the given solid and the liquid can be separated using filter paper in this process, for example, sand and water can be separated using filter paper.
What is filtration ?Filtration is the process of removing solid particles from a liquid or gaseous fluid by using a filter medium that allows the fluid to pass through but retains the solid particles. The desired product could be either the clarified fluid or the solid particles removed from the fluid.
Separating sand from water is a physical process rather than a chemical one. Sand and water are a mixture that can be easily separated without the use of any chemicals. Sand can be filtered out of the water with a sieve and then dried to allow any remaining water to evaporate.
Thus,Water and sand are being separated by filtration.Felting is used as a physical change.
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neurons communicate with each other through the use of chemical messengers called
The correct answer is Neurotransmitters are chemical messengers that are essential for your body to function.
To affect another cell across a synaptic gap, a neuron produces a chemical signaling agent known as a neurotransmitter. Any significant organ, target cell, gland, or muscle cell that receives the signal might be another neuron as well. Neurotransmitters are released from synaptic vesicles in the synaptic cleft, where they may interact with receptors on the target cell. The neurotransmitter's impact on the target cell depends on the receptor to which it binds. From readily available, plentiful precursors like amino acids, which are regularly transformed in a few biosynthetic steps, several neurotransmitters are created.
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a solution contains 0.254 moles of nacl in 250 g of water. how many grams of solute are present, and what is the mass percent (m/m) of the solution?
The Mass percent (m/m) = (14.85/264.85) x 100 = 5.59 %.
What is Mass?Mass is a measure of the amount of matter in an object. It is often measured in kilograms (kg) or grams (g). Mass is related to weight, which is the measure of the force of gravity on an object. While weight can change depending on the gravitational pull of the planet or object it is on, mass remains the same.
The number of moles of solute present can be calculated from the given information.
Number of moles = 0.254 moles
The mass of the solute can be calculated using the formula:
Mass of solute = Number of moles x Molecular mass
Molecular mass of NaCl = 58.44 g/mol
Therefore, Mass of solute = 0.254 x 58.44 = 14.85 g
The mass percent (m/m) of the solution can be calculated using the formula:
Mass percent (m/m) = (Mass of solute/Total mass of solution) x 100
Total mass of solution = Mass of water + Mass of solute
= 250 g + 14.85 g
= 264.85 g
Therefore, Mass percent (m/m) = (14.85/264.85) x 100 = 5.59 %
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Provide a brief history of your region and how your local river impacted the settlement and development of your community.
Parts of the population were liberated from the need on food collecting and hunting as a result of the rivers' provision of an abundance of drinkable water and fertile land to start cultivating food crops.
ImpactNearly 20 million people in 50 cities rely on the Mississippi River for their drinking water every day, which makes it extraordinary. 90% of the agricultural exports from our nation are made from the fertile soils within its sizable watershed.In addition to being the greatest drainage basin in the United States, the Mississippi also defines the borders of ten states. In addition to providing vital resources to both the United States and the rest of the globe, the Mississippi River has influenced American history and economy, especially the travel and fishing sectors.For more information on local river and community development kindly visit to
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