what shape would you expect for xef4 ?
Answers
According to the VSEPR theory the shape of XeF4 is square planar.
XeF4 has a total of six electron pairs around the central xenon atom.Four of these electron pairs are bonding pairs, and the remaining two are lone pairs.
According to the VSEPR theory, the arrangement of these electron pairs around the central atom should be in a square planar shape.In a square planar shape, the central atom is surrounded by four atoms or groups of atoms located in the corners of a square, and the two lone pairs are located on opposite sides of the central atom.
Therefore, XeF4 has a square planar shape.
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Related Questions
Write three sentences about The Amazing Life of Sand
HELP ASAP PLS
Answers
Answer:“If we’ve covered all of the potential sources, and we know the unique signature of the sand from these different sources, and we find it on a beach somewhere, then we basically know where it came from,” explained Barnard.
Explanation:
Apply and explain Coase Theorm.
Answers
The Coase theorem is an economic concept that suggests that, under certain conditions, private parties can efficiently resolve externalities through bargaining without the need for government intervention. It was developed by economist Ronald Coase.
First, property rights must be well defined, allowing individuals to negotiate and make agreements.
Second, transaction costs, such as the costs of gathering information and enforcing agreements, should be low.
Overall, the Coase theorem highlights the potential for private bargaining to efficiently resolve externalities when certain conditions are met.
It emphasizes the importance of well-defined property rights and low transaction costs in facilitating voluntary agreements between parties.
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Which of the following is true: A. Gamma rays are too dangerous to be used in a medicinal way. B. Gamma radiation is used commonly used in smoke detectors C. Gamma radiation should never be used on food products. D. Gamma radiation is frequently used on food to kill bacteria.
Answers
Answer:
D
Explanation:
Gamma radiation penetrates the cell wall of prokaryotic organisms such as bacteria and can inhibit their metabolic functions as well as destroy their DNA.
Debunking the other answers:
A is incorrect as Gamma radiation is used in the treatment of cancer via radiotherapy.
B is incorrect as Gamma rays are too small and would just penetrate any smoke particles.
C is incorrect because Gamma rays are used to disinfect food products to prevent food borne illness. Irradiation is safe to use on food and does not make it radioactive.
Thus, D is correct.
How many atoms of Nitrogen are there in this molecule: 3Ca(NO3)2 ?
Answers
Answer:
Calcium Nitrate is made up of three different elements and contains a total of nine atoms. This compound's formula is Ca(NO3)2. There is one calcium atom, two nitrogen atoms, and there are six oxygen atoms in calcium nitrate.
There are nine atoms altogether in the three distinct elements that make up calcium nitrate. Ca(NO3)2 is the formula for this substance. Calcium nitrate contains one calcium atom, two nitrogen atoms, and six oxygen atoms.
What is calcium nitrate ?Calcium nitrate is an inorganic substance having the formula Ca(NO3)2x. The tetra hydrate is created when the anhydrous chemical, which is uncommon, takes in moisture from the atmosphere. Salts come in two different forms: anhydrous and hydrated.
Calcium nitrate is a chemical compound that dissolves in water and has several applications, including the treatment of water, fertilizers, concrete, and cold packs. Calcium nitrate is mostly utilized in wastewater treatment to eliminate hydrogen sulfide-related odors and guard against oxygen shortage.
It used as a fertilizer in agriculture and as an oxidizing agent in the production of matches. Additionally, the explosives and pyrotechnics industries employ it. In the light business, it is used to create chimneys for incandescent lamps and fireworks. used as a starting point for the production of additional nitrate compounds.
Thus, there are 2 nitrogen atom present in calcium nitrate.
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Which interaction occurs when light goes into an object as heat energy?
A. Absorbed light
B. Bright light
C. Reflected light
D. Refracted light
Answers
Interaction occurs when light goes into an object as heat energy is Absorbed light.
Absorbed light makes an object dark. Absorption of light is when the light is absorbed by the object and converts it into heat energy. The objects converts the wavelength of light into the larger wavelength of heat. this makes the object warmer and produced energy. Absorption depends on the frequency of light that is transmitted. The wavelength of light defined as the distance between the the two successive troughs of the the light wave.
Therefore, Interaction occurs when light goes into an object as heat energy is Absorbed light.
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How would I balance this?
Answers
The balanced chemical equation is as follows:
4KClO₃ ₍s₎ ⇒ 3KClO₄ ₍s₎ + 3KCl
What is balance chemical equation ?The term balanced chemical equation is defined an equation where the number of atoms of each type in the reaction is the equal on both reactants and product sides.
The chemical equation must be balanced in order to obey the law of conservation of mass. When the number of different atoms of elements in the reactants side equals the number of atoms in the products side, the chemical equation is balanced.
Thus, The balanced chemical equation is as follows:
4KClO₃ ₍s₎ ⇒ 3KClO₄ ₍s₎ + 3KCl
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Which of the following would cause the seasons on Earth to change more gradually?
A Increasing the amount of time it takes Earth to orbit the Sun.
B Increasing the number of times Earth rotates on its axis per year.
C Decreasing the speed of the Moon’s orbit around Earth.
D Decreasing the amount of energy the Sun emits per year.
Answers
Answer: The four seasons happen because of the tilt of the Earth's axis. At different times of the year, the sun's rays hit different parts of the globe more directly. The angle of the Earth's axis tilts the Northern Hemisphere towards the sun during the summer.
Explanation: I am not gonna tell u what exactly to pick but this should give an idea okai? Hope I can help u :)
Answer:
so whats the answer?
Explanation:
what is upthrust? name the factor that affect the upthrust.
Answers
The upthrust keeps a ship afloat. The upthrust keeps swimmers on top of the water. Things weigh less in water.
The upward force exerted on a body by the fluid in which the body is submerged is called the upthrust or buoyant force. The property of liquid to exert an upward force on a body immersed in it is called buoyancy. Being a force upthrust is measured in newton or kgf in the system of international units. Examples Pushing an empty can into water experiences the buoyant force. Pushing a cork into water into water experiences the buoyant force. Reason for Upthrust The thrust ating on on the sides of walls of the body get neutralised because they are equal in magnitude and opposite in the directions. There is a pressure difference between the lower and upper faces of block. Since force is the product of pressure and area, The difference in pressure due to liquid is on th two faces of causes a net upward force called upthrust on the body immersed in the fluid.
Answer: upthrust an upward force exerted by a fluid that opposes the weight of an immersed object.It is the force that pushes an object up. ... the upward force that a liquid or gas exerts on a body floating in it.
When a body is placed in water, Up thrust = V x d x g
From the above formula we can say that the following are the factors that affect up thrust:
Acceleration due to gravity - (g)
Density of the liquid - (d)
Volume of the body submerged in the liquid - (V), or volume of the liquid displaced (v)
Explanation:
What is the mass of an object that has a density of 12.7 g/cm3 and a volume of 57.9 cm
Answers
Answer:
735.33 grams
Explanation:
mass = density × volume
= 12.7 × 57.9
= 735.33 grams
What is the percent, by mass, of water in MgSO4.2H20
Answers
Answer:51.1%
Explanation:
Mass percent : It is defined as the mass of the given component present in the total mass of the compound. Formula used : First we have to calculate the mass of and . Mass of = 18 g/mole Mass of = 7 × 18 g/mole = 126 g/mole Mass of = 246.47 g/mole Now put all the given values in the above formula, we get the mass percent of in . Therefore, the mass percent of in is, 51.1%
In a thermonuclear device, the volume is 0.05L of gas and a pressure
of 4.0x106 atm. When the bomb goes off, it relases a gas into the
atmosphere at 1.0 atm, what is the volume of the gas after the
explosion?
Answers
Answer:
2 x 10^5 liters
Explanation:
P1V1 = P2 V2
P1V1 / P2 = V2 = .05 *4 x 10^6 / 1 = .2 x 10^6 liters
Identify all the contributors to a substances strength:
Choose all that apply. (There are two correct answers)
The atomic mass of the atoms
The number of bonds each atom makes to surrounding atoms
The number of neutrons in the nucleus
High levels of chaotic atomic geomtetry
The structures' atomic symmetry and geometry - crystal structure
Answers
The correction options are;
The number of bonds each atom makes to surrounding atomsThe structures' atomic symmetry and geometry - crystal structureFurther ExplanationThe number of bonds each atom makes to surrounding atoms contributes to the substance strength, the strength of a bond between two atoms increases as the number of electron pairs in the bond increases. Thus, we find that triple bonds are stronger and shorter than double bonds between the same two atoms; likewise, double bonds are stronger and shorter than single bonds between the same two atoms.
The crystal structure of a substance can contribute to its strength as it was found that the body-centered-cubic crystal structure is always the softer structure when it is involved in an allotropic transformation. The close-packed and more complex structures are inherently harder, and may be expected, therefore, to be better base materials for high strength alloys.
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Calculate the pH of a 0.09 M solution of HBr
Answers
Which of the following best describes bases? A. They feel slippery and taste sour. B. They turn red litmus paper blue and react with metals. C. They taste bitter and react with carbonates. D. They turn red litmus paper blue and taste bitter.
Answers
Answer: D. They turn red litmus paper blue and taste bitter.
Explanation:
Acids are those substances which either donates hydrogen ions when dissolved in water. They have pH ranging from 1 to 6.9. They are sour in taste. They dissolve metals to give hydrogen gas. They turn blue litmus red.
Bases are those substances which either donates hydroxide ions when dissolved in water or donates a pair of electrons. They have pH ranging from 7.1 to 14. They are bitter in taste. They are slippery in nature. They turn red litmus blue.
Which of the following will only affect the reaction rate of gases?
A. Concentration
B. Catalyst
C. Pressure
D. Surface area
Answers
Answer:
D. Pressure
Explanation:
The rate of a reaction is defined as the speed at which the reactants are converted into products. Factors influencing the rate of a reaction are concentration, catalyst, temperature, surface area, and pressure, etc.
In case of the reaction rate of gases, pressure will only have its affect as pressure do not have any influence on solid and liquid.
While concentration, surface area and catalyst influence all reaction rates including solid, liquids and gases.
Hence, the correct option is (d) pressure.
cr2o72- which element is reduced in the reaction represented above, and how does its oxidation number change?
Answers
The oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.
In the reaction represented by the Cr₂O₇²⁻ ion, the element chromium (Cr) is reduced. Its oxidation number changes from +6 to +3.
In the Cr₂O₇²⁻ ion, each oxygen (O) atom has an oxidation number of -2. The overall charge of the ion is 2-, which means the total oxidation numbers of all the atoms should add up to -2. Since there are seven oxygen atoms, their total oxidation number is (-2) × 7 = -14.
To determine the oxidation number of chromium (Cr), we can set up the following equation;
2(Cr) + 7(-2) = -2
Simplifying the equation, we have;
2Cr - 14 = -2
By solving for Cr, we get;
2Cr = 12
Cr = 6
Initially, the oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.
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You were previously asked to add an additional selection to the standard Case Status picklist field. Users are reporting that this new field is not available for them to select. Where in Setup would you go to troubleshoot this issue
Answers
To troubleshoot the issue of the new field not being available in the standard Case Status picklist, you would need to go to the Object Manager in Setup and check the Field Accessibility for the specific user profiles.
In the Object Manager, you can select the Case object and navigate to the Field Accessibility section to see which profiles have access to the new field. If the field is not visible for a particular profile, you can edit the Field Accessibility settings to make it visible. Additionally, you can check the Page Layouts for the Case object to ensure that the new field is added to the layout and visible for the users. By checking these settings in Setup, you can troubleshoot the issue and ensure that all users have access to the new field.
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1. Calculate the energy for each of the following (1 pt each): Show all your work(a) Joules needed to heat 83.5 g of water from 26.7 °C to 75 °C.
Answers
The question requires us to calculate the energy, in joules (J), necessary to heat 83.5g of water from 26.7 °C to 75°C.
The heat energy (Q) can be calculated from the mass of the sample (m), its specific heat capacity of the substance (C) and temperature variation (ΔT), as given by the following equation:
\(Q=m\times C\times\Delta T\)Since the question did not provide a value for the specific heat capacity of water, we'll adopt the value 4.182 J/g.°C. Applying the values provided by the question, we can calculate the heat energy as:
\(\begin{gathered} Q=m\times C\times\Delta T \\ Q=(83.5g)\times(4.182J/g\mathrm{}\degree C)\times(75-26.7)\degree C=(83.5g)\times(4.182J/g\degree C)\times(48.3\degree C) \\ Q=1.69\times10^4J \end{gathered}\)Therefore, the heat energy necessary to heat the amount of water given grom 26.7 to 75°C is 1.69 x 10^4 J (or 16900 J).
What is called exothermic
Answers
An exothermic process is one that gives off heat.
Explanation:
This heat is transferred to the surroundings. An endothermic process is one in which heat has to be supplied to the system from the surroundings.
When solving net force problems, arrows going opposite directions means you subtract the Newtons.
True
or false
Answers
It's actually true hope it helps.
Write a balanced equation for the following:
1. P4 + O2 → P2O5
2. C3H8 + O2 → CO2 + H2O
3. Ca2Si + Cl2 → CaCl2 + SiCl4
Answers
2) C3H8 + 5O2 = 3CO2 + 4H2O
3) Ca2Si + 4Cl2 = 2CaCl2 + SiCl4
Scott and his classmates were looking at an animal cell under a microscope. They are trying to locate the cell's DNA, which is found in its chromosomes. Where should Scott look to find the chromosomes?
In the mitochondria
In the cell nucleus
In the cytoplasm
In the cell vacuole
Answers
the. particles of an ice cube at 0C (represented by the blue circle) comme in contact with the particles of jaun's hand at 37 C ( represented by the orange circles. which diagram correctly represents the temperature of the two substances and the direction of heat flow?
Answers
Answer:
B.
Explanation:
I just did the edge nuity assignment
What Is The IUPAC Name For The Compound Shown? IUPAC Name: C10H22
Answers
Answer:
Decane Is the IUPAC name of C10H22
By the IUPAC Naming Convention followed by every chemical standards, the structure shown in the image is named as Decane.
IUPAC Stands for International Union of Pure and Applied Chemistry.This organisation issued some standards for naming any chemical components that is followed world wide.
According to the IUPAC Standards:
First of all we have to identify the longest carbon chain which is [CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3] alkane group according to this image.As a result of 10 carbon linked with single bonds and having hydrogen to balance the electron share it will be named Decane.It is an alkane hydrocarbon with the chemical formula C10H22.
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What name is given to a material that does not conduct thermal energy well?
Answers
The name given to a material that does not conduct thermal energy well is an insulator.
Thermal energy is the internal energy contained in a substance, which increases with the average velocity of the constituent particles, which may be atoms or molecules. The faster the molecules move, the greater the thermal energy. Thermal energy may be transferred between objects, but it is only transferred from a hotter to a cooler object. For example, heat is transferred from hot coffee to the mug holding it, then from the mug to the air in the room if the mug is left on a table. An insulator is a material that is used to insulate, such as electrical wires or pipelines. An insulator is a material that does not conduct thermal energy, electricity, or sound well. For example, rubber is a good insulator because it does not conduct electricity, while air is a good insulator because it does not conduct heat. Apart from rubber, other good thermal insulators are foam, wool, glass wool, and mineral wool. Thermal insulation is used in walls, windows, doors, roofs, and floors to keep buildings warm in winter and cool in summer.Learn more about Thermal energy: https://brainly.com/question/19666326
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Under conditions of extreme heat and pressure, sedimentary rock can transform into metamorphic rock. True or false?
Answers
Answer:
Sedimentary rocks like bituminous coal, limestone, and sandstone, given enough heat and pressure, can turn into nonfoliated metamorphic rocks like anthracite coal, marble, and quartzite. Nonfoliated rocks can also form by metamorphism, which happens when magma comes in contact with the surrounding rock
Explanation: THEREFORE I'D SAY TRUE!
what happens when there is more kinetic energy?
Answers
Energy that a moving object has due to its motion is Kinetic Energy. Kinetic Energy: ... The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.
Answer:
when there is more kinetic energy the objects moves fast...
how do you explain this result? how do you explain this result? the addition of alcohol dehydrogenase plus its substrate allows regeneration of nad . now oxidized nad is available for the additional tca reactions in which additional co2 can be produced. the addition of alcohol dehydrogenase plus its substrate allows regeneration of fad . now oxidized fad is available for the additional tca reactions in which additional co2 can be produced. the addition of alcohol dehydrogenase plus its substrate allows regeneration of gdp . now oxidized gdp is available for the additional phosphorylation in which additional co2 can be produced. the addition of alcohol dehydrogenase plus its substrate allows regeneration of oxaloacetate. additional amount of the substrate is available for the following tca reactions in which additional co2 can be produced.
Answers
The addition of alcohol dehydrogenase plus its substrate allows regeneration of NAD+. Now oxidized NAD+ is available for the additional TCA reactions in which additional CO2 can be produced.
The reduction of nicotinamide adenine dinucleotide to NADH by a class of dehydrogenases known as alcohol dehydrogenases allows for the interconversion of alcohols with aldehydes or ketones.
Alcohol is made of ethanol, which is metabolized by the enzyme alcohol dehydrogenase (ADH) into the poisonous compound acetaldehyde. Acetaldehyde is then converted by the liver enzyme aldehyde dehydrogenase (ALDH) into acetate, a less harmful substance that decomposes into water and carbon dioxide.
Alcohol is metabolized by the liver using cytochrome P450 2E1 and alcohol dehydrogenase (ADH) (CYP2E1). Although ethanol is metabolized into acetaldehyde by both enzymes, CYP2E1 activity also generates reactive oxygen species (ROS) that encourage oxidative stress.
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The molar mass of water (h2o) is 18.0 g/mol. a sample of water has a mass of 18.0 g. how many moles of water are contained in this sample? 1.00 mole 18.0 moles 36.0 moles 324 moles
Answers
The moles of water are contained in the given sample is 1 mole.
How do we calculate moles?Moles of any substance will be calculated by using the below formula:
n = W/M , where
W = required mass
M = molar mass
Given molar mass of H₂O = 18.0 g/mol
Given mass of H₂O = 18.0 g
Moles of H₂O = 18.0 g / 18.0 g/mol = 1 moles
Hence option (1) is correct.
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Answer:
A. 1.00 Mole
Explanation:
edg 2023
What is the equilibrium concentration (in M to three decimal places) of HBr for the following reaction if [H2]i = [Br2]i = 0.500 M at 25 °C?
H2(g)+Br2(g)⇌2HBr(g)K=0.000351
Answers
The equilibrium concentration (in M to three decimal places) of HBr for the given reaction is 0.025 M at 25 °C.
Let x be the equilibrium concentration of HBr. Then, the equilibrium concentrations of \(H_2\) and \(Br_2\) will also be x, since the stoichiometry of the reaction is 1:1:2.
Using the equilibrium constant expression for this reaction:
\(K = [HBr]^2/ ([H_2] [Br_2])\)
Substituting the initial concentrations and the equilibrium concentrations in terms of x:
0.000351 = (2x)² / (0.5 - x)²
Solving for x:
0.000351 (0.5 - x)² = 4x²
0.0001755 - 0.000702 x + 0.000351 x² = 4x²
3.99965 x² + 0.000351 x - 0.0001755 = 0
Using the quadratic formula:
x = (-0.000351 ± √(0.000351² + 4(3.99965)(0.0001755) / (2(3.99965))
x ≈ 0.025 M (rounded to three decimal places)
Therefore, the equilibrium concentration of HBr is 0.025 M.
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