Which of the following statements describes electromagnetism?

The distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.

The distance between two points is calculated using the following equation.

for a given points (x1, y1), (x2, y2), the distance, d is;

d = √[(x2-x1)² + (y2 - y1)²]

From the given question;

x1 = 8, y1 = -5

x2 = 1, y2 = 1

distance = √[(1-8)² + (1 - -5)²]

distance = √[(-7)² + (16)²]

distance = 9.22 units

Thus, the distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.

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Convection currents are the underlying cause of tectonic plate interactions that cause geological events, like earthquakes and volcanoes.

The tectonic plate interactions and processes that result in the construction of mountains and other landforms constitute the geological event that is taking place. Convection currents, which happen as molten rock rises from the Earth's mantle below the surface and then cools as it flows to the surface, are one of the primary processes generating this creation.

The plates move and interact with one another as a result of this process, which is fueled by the disparity in density between the hot and cold rock. Divergent boundaries, the kind of boundary at which this phenomenon occurs, are brought about by two plates moving apart.

The creation of the Himalayan Mountains is an illustration of this process. The Himalayas were created as a result of the Himalayan Plate colliding with the Eurasian Plate as it steadily moved north.

High peaks, deep valleys, and steep cliffs are some of the physical features that are visible as a result of this process. The highest mountain range in the world is the Himalayas, and Mount Everest is its highest peak.

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At 1045 K, the partial pressures of an equilibrium mixture of H2O(g), H2(g), and O2(g) are 0.0400, 0.00450, and 0.00300 atm, respectively.

To calculate the value of the equilibrium constant Kp at 1045 K:

The balanced equation is:

2H2(g) + O2(g) ⇌ 2H2O(g).

The equilibrium constant Kp expression for the reaction is:

Kp = (pH2O)² / (pH2)²(pO2)

The partial pressures at equilibrium at 1045 K are: pH2O = 0.0400 atm; pH2 = 0.00450 atm; pO2 = 0.00300 atm

Kp = (0.0400)² / (0.00450)² (0.00300)

Kp = 5.6 x 10⁴ mol²/L² (approx)

The equilibrium constant Kp at 1045 K is 5.6 x 10⁴ mol²/L² (approx). Therefore, option C is the correct answer.

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Answer:

It  equals to the number of electrons in that atom, which is in turn equal to its atomic number

Explanation:

Answer:

Sorry can't help

Explanation:

Cant help!

The two structures shown in the image are constitutional isomers. Option C

Constitutional isomers are compounds that have the same molecular formula but differ in the arrangement or connectivity of atoms. They have distinct chemical structures, resulting in different physical and chemical properties.

These isomers can exist due to the possibility of different bond arrangements or the presence of branching, double bonds, or ring structures. By altering the arrangement of atoms within a molecule, constitutional isomers exhibit unique properties, reactivity, and potential biological activities.

Thus, looking at the two structures shown, one can conclude that they are constitutional isomers.

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Answer: 89.7 L

Explanation:

89.6 volume, in liters, does 128 grams of O2 occupy at STP. Therefore, option A is correct.

A volume is simply the amount of space taken up by any three-dimensional solid. A cube, a cuboid, a cone, a cylinder, or a sphere are examples of solids. Volumes differ depending on the shape.

Every three-dimensional object requires some amount of space. The volume of this space is measured. Volume is defined as the space occupied by an object within the boundaries of three-dimensional space. It is also known as the object's capacity.

1 mole Oxygen has mass 32 grams

Mole of Oxygen in 128 g mass = 128 g / 32 g/mol

= 4.0 mol O2

At Standard temperature and pressure this has volume

= 4.0 mol × 22.4 L/mol

= 89.6 L

Thus, 89.6 volume, in liters, does 128 grams of O2 occupy at STP, option A is correct.

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Answer: 22400

Explanation:

Answer:

The answer is option B.

Reduction

Hope this helps you

Answer:

plato answer b

Explanation:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{8.5 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 141.19601...\)

We have the final answer as

Hope this helps you

Answer:

45 mins

Explanation:

it takes 45 minutes long

The central carbon atom in glycine has four atoms and two lone pairs of electrons. Therefore, the electron geometry of the central carbon atom is octahedral, with bond angles of 90°, 180°, and 120°.The next step is to determine the molecular geometry. The molecular geometry in glycine is distorted tetrahedral, with bond angles of 120°.The approximate c-n-h bond angle in glycine is 120°.

The VSEPR theory defines that lone pairs occupy larger regions in space than bonding pairs. The VSEPR theory assumes that electron pairs are situated around the central atom in a way that minimizes electron-pair repulsions to form a shape that maximizes the distance between them. Therefore, in glycine, the approximate c-n-h bond angle is 120°. Thus, the correct option is (c) 120°.Explanation:The Lewis structure of Glycine:Glycine has 4 atoms and 2 lone pairs of electrons. It is an amino acid with NH2 as the amino group and COOH as the carboxylic group.Glycine Lewis structureGlycine molecule has two -CH2 groups on either side of the central carbon atom, to which the amino group and carboxyl group are attached. To determine the shape of the molecule, it is essential to understand the Lewis structure of the molecule. The next step involves the determination of the number of atoms and electron pairs around the central carbon atom.The VSEPR theory defines that the geometry of the molecule depends on the electron pairs' number in the central atom. The central carbon atom in glycine has four atoms and two lone pairs of electrons. Therefore, the electron geometry of the central carbon atom is octahedral, with bond angles of 90°, 180°, and 120°.The next step is to determine the molecular geometry. The molecular geometry in glycine is distorted tetrahedral, with bond angles of 120°.The approximate c-n-h bond angle in glycine is 120°.

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The surface tension depends on the intermolecular forces, and it rises as the strength of those forces rises. Hydrogen bonds are present in water in acetone, but not the other way around. Water, therefore, has a high surface tension.

The only other liquid with a higher surface tension than water is mercury. A sign that the hydrogen bond is present is surface tension. Hydrogen bonds between the water molecules below them and those at the surface of the water create a powerful attraction between them.

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The acid‑catalyzed hydration of 3‑methyl‑1‑butene. for each of the four steps, add one or two curved arrows to the reactant side to show the mechanism is followed by the Markownikov's rule.

The acid‑catalyzed hydration of 3‑methyl‑1‑butene mechanism is given as follows :

CH₃ - CH - C = CH₂  ---->   CH₃ - CH - C - CH₂⁻   +   OH⁻   ---->  

          |      |                                      |      |

        CH₃   H                                 CH₃  H          

CH₃ - CH - CH - CH₂⁻   H⁺ ----->   CH₃ - CH - CH - CH₃

          |      |                                                 |     |

        CH₃  OH                                      CH₃    OH

The above mechanism is followed by the rule of the Markownikov's rule.

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Absolute zero is an idea in thermodynamics that describes the lowest energy system.

Thermodynamics

Thermodynamics is the study of thermal energy and heat. One of the most important ideas in thermodynamics is entropy. Entropy is defined as the chaos within a system. Chaos is the movement or different orientations of molecules in a system. Entropy is related to temperature; the higher the temperature, the higher the entropy. High entropy means there is a large amount of chaos in a system, while low entropy is low chaos.

Absolute zero

Absolute zero occurs when the temperature of a system is 0 kelvin or -273.15 °C. Zero kelvin is the theoretical temperature in which entropy equals 0. This means that there is no movement or energy within a system. Absolute zero is the lowest energy a system can possibly have.

Answer:

Magnesium Flouride is a ionic compound and thus has a giant lattice structure. Its ions are held together in this lattice by strong electrostatic forces of attraction. A large amount of energy is needed to overcome the strong electrostatic forces of attraction between the Mg2+ ions and the F- ions to separate the ions. Hence Magnesium fluoride has a very high melting point.

The statement is true in this situation is C. The size of Ffric is the same as the size of Fapp:

From the diagram, since the body is in equilibrium, the sum of vertical forces equals zero. Also, the sum of horizontal forces equal zero.

So, ∑Fx = 0 and ∑Fy = 0

Since Fapp acts in the negative x - direction and Ffric acts in the positive x - direction,

∑Fx = -Fapp + Ffric = 0

-Fapp + Ffric = 0

Fapp = Ffric

Also, since Fgrav acts in the negative y - direction and Fnorm acts in the positive y - direction,

∑Fy = Fnorm + (-Fgrav) = 0

Fnorm - Fgrav = 0

Fnorm = Fgrav

So, we see that the size of Fapp equals size of Ffric and the size of Fnorm equals the size of Fgrav.

So, the correct option is C

The statement which is true in this situation is C. The size of Ffric is the same as the size of Fapp.

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The Sr-92 isotope, when bombarded with bismuth-209, would yield two neutrons and an isotope with atomic number 121 and mass number 299

When it comes to nuclear research, there are always new isotopes and elements being created. The Sr-92 isotope is one of the latest discoveries, and it has the potential to change the game when it comes to nuclear power.

When this isotope is bombarded with bismuth-209, it yields two neutrons and an isotope with an atomic number of 121 and a mass number of 299. This is a huge breakthrough because it could potentially be used to create a new form of nuclear power.

There is still a lot of research that needs to be done in order to make this a reality, but the potential is there. It will be interesting to see how this develops in the coming years.

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Explanation:

When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside

Answer:

The pressure of the liquid (blood) forces the liquid to move into the syringe when its plunger is withdrawn. When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

Two possible steps where product yield may be lost are: incomplete reactions and loss during purification.

Incomplete reactions: If the reaction is not allowed to proceed to completion, some of the reactants may remain unreacted and the product yield will be lower than the theoretical yield. This can happen if the reaction is stopped prematurely, if the reaction conditions are not optimal, or if there are competing reactions that consume some of the reactants.

Loss during purification: After the reaction is complete, the product is often purified to remove any unreacted reactants, byproducts, or impurities.

This can involve processes such as filtration, distillation, or chromatography. During these purification steps, some of the product may be lost, leading to a lower actual yield.

If the yield was above 100%, this could have happened due to the presence of impurities in the product that were not removed during purification. These impurities could have added to the mass of the product, leading to a higher yield than expected.

Alternatively, there could have been measurement errors during the experiment that led to an inaccurate calculation of the yield.

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Answer:

A

Explanation:

B) pollution doesn't affect water

C) Air pollution makes carbon dioxide

D) air pollution does not affect temperature

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

I don't know

Explanation:

mixture of iron powder and sulphur heated it glows because sulphur and iron are more reactive metals that they shine and sulphur can react with water produce fire it's write

The most likely identity of this element is beryllium.

Bromine and chlorine belong to the same group and therefore have similar chemical properties. The unidentified element shares many of the same physical and chemical properties as sodium and rubidium but has a lower atomic mass than either of these elements. The element with atomic number 35 is bromine.

Chlorine and bromine belong to the same group and therefore have similar properties. There are elements in nature that have not yet been created or discovered, but scientists already know what they are and can predict their properties. For example, element 125 is not observed, but if it is it will appear in a new row of the periodic table as a transition metal.

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Tectonic plates are found in the oceanic and continental lithosphere. The splitting of Africa and the plate tectonics movement is similar to Pangaea as the latter was a large continent that also split.

Pangaea was a large continent in the early geological times that covered almost all the landmass of the earth. It was a supercontinent that underwent splitting after the continental plates started drifting apart, resulting in the formation of the now known continents.

The movement of the Nubian and the Somali plates of Africa is similar to that of the Pangaea as the continent is big and intact now but in the future, the plates will drift very apart, creating more smaller continents.

Therefore, the Pangaea event is similar to the plate tectonic movement of Africa.

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Answer:

What elements?

Explanation:

The alkali metals are softer than most other metals. Cesium and francium are the most reactive elements in this group. Alkali metals can explode if they are exposed to water.

Not sure if this what you were talking about but here

This from google btw not gonna lie

0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.

In order to calculate the number of moles of O2 needed to produce 14.2 grams of P4O10 from P, we need to use the equation for the reaction:

P + 5O2 → P4O10

We can calculate the number of moles of O2 needed by using the molar mass of P4O10, which is 284 g/mol. First, we need to calculate the number of moles of P4O10 present in 14.2 grams:

14.2 g/ 284 g/mol

= 0.05 mol.

Now, we can use the mole ratio between P and O2 to calculate the number of moles of O2 needed. The mole ratio is 5:1, meaning that for every 5 moles of O2, 1 mole of P is needed. Therefore, to get 0.05 moles of P4O10 from P, we need 0.05 x 5 = 0.25 moles of O2.

In conclusion, 0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.

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Answer:

-958 spontaneuos

Explanation:

Answer:

-958

spontaneous

Explanation:

Rhodium (Rh) has atomic number 45, so a Rh3+ cation has 42 electrons after losing three electrons.

The electron configuration of neutral Rh is [Kr] \(4d^8 5s^1\), where the valence shell contains 9 electrons (8 in the 4d subshell and 1 in the 5s subshell).

When Rh loses three electrons to form Rh3+, the 4d subshell is emptied first. Therefore, the electron configuration of Rh3+ can be written as [Kr] \(4d^5\).

The number of d electrons in the valence shell of Rh3+ is 5.

To determine the number of unpaired electron spins, we need to apply Hund's rule, which states that electrons in degenerate orbitals (orbitals with the same energy) will first fill singly with parallel spins before pairing up with opposite spins.

In the case of Rh3+, the five d electrons will first fill the five available d orbitals singly with parallel spins before any pairing occurs. Therefore, there are 5 unpaired electron spins in Rh3+.

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