Which molecule contains the largest bond angle?

C₂H4
H₂O
NH3
CH4

The option A describes an exothermic reaction.

i.e, ΔHt,reactant > ΔHt, product

The reaction in which energy is release during the formation of reaction is called exothermic reaction.

Mathematically,

ΔHf = ΔH(product) - ΔH(reactant)

For exothermic reaction, ΔHt,reactant > ΔHt, product

So,for exothermic reaction, ΔHf is negative.

Where,

ΔHf = Enthalpy of formation of reaction

ΔH(product) = enthalpy of formation of product

ΔH(reactant) = enthalpy of formation of reactant

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Many island chains were formed as a result of blank volcanism is known as hotspot volcanism.

Hotspot volcanism occurs when a mantle plume, a column of hot and buoyant rock material rising from deep within the Earth's mantle, reaches the surface. These mantle plumes are stationary relative to the moving tectonic plates on the Earth's surface.

As the tectonic plate moves over the stationary hotspot, the mantle plume melts and produces magma. This magma rises through the Earth's crust, creating a volcanic eruption. Over time, repeated eruptions build up layers of lava and volcanic material, forming a cone-shaped volcano. As the tectonic plate continues to move, the volcano becomes inactive, and a new volcano forms above the stationary hotspot.

However, in the case of island chains, the tectonic plate movement carries the volcanoes away from the hotspot. As a result, a trail of extinct volcanoes is left behind, forming a linear chain of islands. Each island in the chain represents a period of volcanic activity at that specific location as the plate moved over the hotspot.

Hotspot volcanism and the formation of island chains provide valuable insights into the dynamics of Earth's mantle and plate tectonics. By studying the age progression of islands in a chain, scientists can gain a better understanding of the movement and speed of tectonic plates and the behavior of mantle plumes deep beneath the Earth's surface.

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Explanation:

Ideal Gas Law

PV = n R T

V = n R T / P     n = moles    R = gas constant = .082057   L atm / ( K mol)

                         T is in Kelvin

V =  .25 moles * .082057 * (273.15 + 57) K / .82 atm = 8.3 moles

   ( two Sig Dig)

Answer:

zygote

Explanation:

In human beings, each gamete contains 23 chromosomes, half the number found in the other cells of the body. When the male and female gametes fuse, they become a zygote containing the full 46 chromosomes, half of which came from the father and half from the mother.

Answer:

zygote

Explanation:

In human beings, each gamete contains 23 chromosomes, half the number found in the other cells of the body. When the male and female gametes fuse, they become a zygote containing the full 46 chromosomes, half of which came from the father and half from the mother.

This element is in group 1.

According to the octet rule, this element would be expected to form an ion with a charge of +1.

If X is in period 5, the ion formed has the same electron configuration as the noble gas Krypton

The symbol for the ion is Rb⁺

Electronic configuration refers to the arrangement of electrons in the orbitals of an atom or molecule, indicating the energy level of the electrons, the number of electrons in each energy level, and the number of electrons in each orbital.

Considering the given element:

It has one valence electron, hence it is in group 1. Group 1 elements form ions with a charge of +1.

Losing one electron will give the ion the same electron configuration as Kyrton since it is the noble gas in Period 4.

The element is rubidium and the ion is Rb⁺.

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Answer:

what

Explanation:

Answer:

true mark me brainlist

Explanation:

Answer:

2.58 * 10^19 atoms of titanium

Explanation:

Mass of Titanium ions deposited = 2.05 * 10^-3 g of Ti

Molar mass of titanium = 47.87 g/mol

Number of moles of Titanium deposited = 2.05 * 10^-3 g/47.87 g/mol = 4.28 * 10^-5 moles

Number of atoms of titanium deposited = number of moles of titanium * Avogadro's number

Number of atoms of titanium deposited =4.28 * 10^-5 moles * 6.02 * 10^23 = 2.58 * 10^19 atoms of titanium

Answer:

1.)

Explanation:

The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

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The electrons that are gained by the \(Ni^{2+}\) ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Paper used as a writing material is made of pulp (wood).

Paper is a sheet material used for writing on or printing on (or as a non-waterproof container), usually made by draining cellulose fibres from a suspension in water.

Paper is made from cellulose found in trees, which are the main source of cellulose fibre (or woodpulp). Besides woodpulp, paper can be made from other materials such as cotton, flax, esparto, straw, hemp, manilla and jute.

Wood pulp is usually a softwood, used for pulping to make paper.

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There are 3.44 x 10^{22} particles in 0.057 moles of lithium bromide.

The lithium bromide formula also known as the lithium monobromide formula or Bromo lithium formula is explored. It is a counterion bromide-based salt of lithium.

we have to use Avogadro's constant,

Avogadro's constant, is approximately equal to 6.022 x 10^{22} particles per mole.

we can use the following formula:

number of particles = moles x Avogadro's constant

Substitute the values,

number of particles = 0.057 moles x 6.022 x 10^{23} particles/mol

Simplifying the equation

number of particles = 3.44 x 10^{22} particles

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Answer:

Reflex angle

Explanation:

Angles that are greater than 180 degrees but less than 360 degrees have a special name: reflex angles.

Here, we see that 200 degrees is indeed between 180 and 360, which means it qualifies as a reflex angle.

The answer is thus reflex angle.

~ an aesthetics lover

Answer:

a. 2-methyl-propane.

b. 2-methyl-butane.

c. 4-ethyl-heptane.

d. 4-methyl-3-ethyl-heptane.

e. 3,3,5-trimethyl-heptane.

f. 2-dimethyl-butane.

g. 2-dimethyl-propane.

h. 3-diethyl-pentane.

Explanation:

Hello, for IUPAC rules, take into account that for numbering the organic chain, we must start by the carbon havinf the closest radical to it. Moreover, for naming, we can name alphabetically or by complexity order as shown below:

a. In this case, we consider the middled methyl as a radical in the three-carbon chain, therefore, IUPAC name is 2-methyl-propane.

b. In this case, we consider the methyl at the second carbon in the four-carbon chain (longest one), therefore IUPAC name is 2-methyl-butane.

c. In this case, we consider the ethyl at the fourth carbon in the seven-carbon chain (longest one), therefore IUPAC name is 4-ethyl-heptane.

d. In this case, we consider the ethyl at the third carbon and the methyl at the fourth carbon in the seven-carbon chain (longest one), therefore IUPAC name is 4-methyl-3-ethyl-heptane.

e. In this case, we consider the three at the third and fifth carbons in the seven-carbon chain (longest one), therefore IUPAC name is 3,3,5-trimethyl-heptane.

f. In this case, we consider the two methyles at the second carbon in the four-carbon chain (longest one), therefore IUPAC name is 2-dimethyl-butane.

g. In this case, we consider the two methyles at the second carbon in the three-carbon chain (longest one), therefore IUPAC name is 2-dimethyl-propane.

h. In this case, we consider the two ethyles at the third carbon in the five-carbon chain (longest one), therefore IUPAC name is 3-diethyl-pentane.

Best regards.

Answer: NaCl; Sodium Chloride

Explanation:

Answer:

An ionic bond is a bond between two ions of opposite charge (a cation (+) and an anion (-).

Explanation:

I really hope this helps! :)))

Answer:

false

Explanation:

Answer:

Explanation:

I believe its A

Answer:Electrical Conductivity,soluble

Explanation:

Salt is a non-magnetic solid and is soluble in water. Sand is a non-magnetic solid and is insoluble in water.

Electrical Conductivity: Salt is an electrolyte and conducts electricity when dissolved in water or in a molten state. This is because salt dissociates into ions (Na+ and Cl-) that can carry electric current. In contrast, sand is a covalent compound and does not conduct electricity, as it does not dissociate into ions in the same way as salt. Sand is considered an insulator in terms of electrical conductivity.

Answer:

Carbon dioxide is a gas because the particles surrounding it are more spread out and free from each other. Water is a liquid because the particles are partially spread out and have a medium space to move around. And due to the room temperature, salt's particles can either be hot and move rapidly, or be cold and not move rapidly.

Explanation:

The volume of an object that floats on the water can be found by making it sink forcefully. For this the object is tied to another object that can easily sink. The floating object will sink in the water and its volume can be determined.

Volume is a measure of three-dimensional space. It is often quantified numerically using SI derived units or by various imperial or US customary units . The definition of length (cubed) is interrelated with volume. The volume of a container is generally understood to be the capacity of the container; i.e., the amount of fluid (gas or liquid) that the container could hold, rather than the amount of space the container itself displaces.

In ancient times, volume is measured using similar-shaped natural containers and later on, standardized containers. Some simple three-dimensional shapes can have their volume easily calculated using arithmetic formulas. Volumes of more complicated shapes can be calculated with integral calculus if a formula exists for the shape's boundary. Zero-, one- and two-dimensional objects have no volume; in fourth and higher dimensions, an analogous concept to the normal volume is the hypervolume.

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Answer:

Iodide> Bromide > chloride > flouride

Explanation:

During a nucleophilic substitution reaction, a nucleophilie replaces another in a molecule.

This process may occur via an ionic mechanism (SN1) or via a concerted mechanism (SN2).

In either case, the ease of departure of the leaving group is determined by the nature of the C-X bond. The stronger the C-X bond, the worse the leaving group will be in nucleophilic substitution. The order of strength of C-X bond is F>Cl>Br>I.

Hence, iodine displays the weakest C-X bond strength and it is thus, a very good leaving group in nucleophillic substitution while fluorine displays a very high C-X bond strength hence it is a bad leaving group in nucleophilic substitution.

Therefore, the ease of the use of halide ions as leaving groups follows the trend; Iodide> Bromide > chloride > flouride

Answer:

241.08039999999588

Explanation:

The statement that can definitely be inferred from the observation that the temperature rises when a solution of CaCl2 is dissolved in water is  Option III is correct.

The interactions between the species in solution are stronger compared to those in the separate solute and solvent. To analyze this problem, we need to consider the entropy of the system, which is related to the disorder or randomness of a system. The entropy of a system can be calculated by measuring the energy that must be supplied to the system to return it to its original state.
When the CaCl2 is dissolved in water, the entropy of the system increases because of the increase in the randomness of the system. This increase in entropy leads to a rise in temperature. Because the interactions between the species in solution are stronger than those in the separate solute and solvent, this suggests that the entropy of the system for this process is positive. The interactions in the separate solute and solvent are weaker than those between the species in solution.
Therefore, the statement that can definitely be inferred from the observation that the temperature rises when a solution of CaCl2 is dissolved in water is  Option III.

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Answer:

matter is what air is made up of

Answer:

Matter

Explanation

Air takes up space. Matter is something that takes up space and is made of mass.

Hope this helps!

Answer:

B. habitat

Explanation:

got it right on my test hope this helps:)

Answer:

It's habitat.

Explanation:

I took the Module 3 Exam and got it right.

306.178 liters is the volume of O2 at STP, required for the complete combustion of 125g octane (\(C_{8}H_{18}\)) to \(CO_{2}\) and H20

To calculate the volume of \(O_{2}\) required for the complete combustion of octane (\(C_{8}H_{18}\)) to \(CO_{2}\) and \(H_{2}O\) at STP (Standard Temperature and Pressure), we need to consider the stoichiometry of the balanced chemical equation.

The balanced equation for the combustion of octane is:

\(C_{8}H_{18}\) + 12.5\(O_{2}\) -> 8\(CO_{2}\) + 9\(H_{2}O\)

From the equation, we can see that 1 mole of octane requires 12.5 moles of \(O_{2}\) to completely combust. The molar mass of octane (\(C_{3}H_{18}\)) is approximately 114.22 g/mol.

To calculate the moles of octane, we divide the given mass by the molar mass:

Moles of octane = 125 g / 114.22 g/mol ≈ 1.093 mol

Since the molar ratio between octane and \(O_{2}\) is 1:12.5, the moles of \(O_{2}\)required can be calculated as:

Moles of \(O_{2}\) = 1.093 mol * 12.5 ≈ 13.663 mol

Now, we can use the ideal gas law, PV = nRT, to calculate the volume of \(O_{2}\) at STP. At STP, the temperature is 273 K, and the pressure is 1 atm.

Using the molar volume of an ideal gas at STP (22.4 L/mol), the volume of \(O_{2}\) required is:

Volume of \(O_{2}\) = Moles of \(O_{2}\) * Molar volume = 13.663 mol * 22.4 L/mol ≈ 306.178 L

Therefore, approximately 306.178 liters of \(O_{2}\) at STP would be required for the complete combustion of 125 grams of octane (\(C_{8}H_{18}\)) to \(CO_{2}\) and \(H_{2}O\)

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