Make a prediction about the relationship between electrons and molecular shapes
P.S WILL GIVE BRAINLIEST!

Answer:

battery, phone cover, model of phone, plastic cover phone by rain oil or some harmful effects , need wire Stricker to make phone good so the people buy it and some inner parts

Explanation:

Hope this helps:)

The possible fuels that can be used are, LPG (Liquefied petroleum gas), CNG (Compressed Natural Gas), Biogas, and fossil fuels.

An ideal fuel has the following characteristics:

Thus, LPG (Liquefied petroleum gas), CNG (Compressed Natural Gas), Biogas, and fossil fuels are ideal fuels and can be used in the eco-friendly reactor.

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0.84 milligrams of a 2. 000 mg sample remain after 6. 55 years, according to radioactive decay.

Given data,

\(t\frac{1}{2} of Co-60 = 5.20years\)

amount of sample = 2.000mg initially = 0.002grams

According to radioactive decay,

\(N_{t} = N_{0}e^{-λt}\)

(\(N_{0} - 0.002\) )λ = \(\frac{0.693}{t\frac{1}{2} }\) = \(\frac{0.693}{5.20}\)  = 0.133

According to radioactive decay,

\(N_{t} = N_{0}e^{-λt}\)

\(lnN_{t} = lnN_{0}\) - λt

\(lnN_{t}\) = ln0.002 - (0.133×6.55)

       = -6.21 - 0.87 = -7.08 = 0.00084g = 0.84mg

Therefore, 0.84 milligrams of a 2. 000 mg sample remain after 6. 55 years.

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Answer:  The electron transition from 4p→2s  would produce light with a longer wavelength.

Explanation: The energy of an electron in a hydrogen atom is higher when it is at a higher energy level. When an electron undergoes transition it releases energy in the form of electromagnetic radiation or light. The higher the transition, the greater the energy.

Now we know that the energy released in the 4p→1s transition is greater than the energy released in the 4p→2s transition. And since energy is inversely proportional to wavelength, the wavelength of light in the latter case is more.

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Answer:2, 7, 4, 6

Explanation:

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

The term evapotranspiration combines infiltration and transpiration is False.

False. The term evapotranspiration does not combine infiltration and transpiration. Evapotranspiration refers to the combined process of evaporation and transpiration.

Evaporation is the process by which water changes from a liquid to a gas state and is primarily driven by heat energy from the sun. Transpiration, on the other hand, is the process by which plants release water vapor through their leaves.

Infiltration, however, is a separate process that refers to the downward movement of water from the surface into the soil. It is not directly related to evapotranspiration.

Therefore, the term evapotranspiration does not combine infiltration and transpiration.

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Answer:

Kr- dispersion forces

CBr4- dispersion forces

CH3OH - dispersion forces, dipole interaction, hydrogen bonding

NaF- ionic

Kr-<CBr4<CH3OH<NaF

Explanation:

The magnitude of intermolecular forces influences the boiling points of substances. The stronger the intermolecular forces the higher the boiling point.

The strongest intermolecular forces here is the Ionic bond hence it accounts for the highest boiling point followed by CH3OH having hydrogen bonding.

Though Krypton and CBr4 both have dipole interaction, the higher relative molecular mass of CBr4 makes it to have a higher boiling point than Kr

Answer:

A transition from one accepted theory to another or from one employed method to another.

Explanation:

Explanation:

Corrections

- It should be 45 bromine atoms

- Bromine isn't found abundantly as atoms, rather as diatomic molecules

\(Br_2\)

Before should show 2 phosphorus atom and 3 bromine molecules to form 2 phosphorus tribromide

The bond is covalent because both bromine and phosphorus is a non-metal

Answer:

true

Explanation:

In 2 hours, it went 60 metres. 60 / 2 = 30 so true

Answer:

The correct answer to that question is glaciers, waves, wind.

Answer:

I think it is D but I could be wrong.

Explanation:

The given statement "600 ml of a 5 M solution of sodium hydroxide contains 5 moles of sodium hydroxide" is false. Because 600 ml of a 5 M solution of sodium hydroxide contains 3 moles of sodium hydroxide, not 5 moles.

A 5 M (mol/L) solution means that there are 5 moles of the solute (in this case, sodium hydroxide) dissolved in 1 liter of solution. Therefore, to calculate the number of moles of sodium hydroxide in 600 ml (0.6 L) of the solution, we can use the following formula;

moles = M x L

where M will be the molarity and L will be the volume in liters.

So, moles of NaOH = 5 mol/L x 0.6 L

= 3 moles of NaOH

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t = 57 min., Therefore, we can say that it takes 57 minutes for cyclopropane's partial pressure to drop from 1 atm to 0.125 atm at 500°C.

Propene (CH3CH=CH2) is produced by the isomerization of cyclopropane, which is a first-order process. A sample of cyclopropane converts to propene in 79 minutes at 760 K.

The reaction is a first-order reaction because it is an isomerization reaction, and its rate constant is expressed in terms of minutes. The sum of the powers or exponents that the concentration terms are raised in the rate law expression can be used to define the order of a reaction.

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Answer:

To solve this problem, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional when temperature is held constant. This can be expressed as:

P1V1 = P2V2

where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

We can plug in the given values and solve for P2:

P1 = 1200 mmHg

V1 = 88 ml

V2 = 130 ml

P1V1 = P2V2

1200 mmHg * 88 ml = P2 * 130 ml

105600 mmHgml = 130P2 mlmmHg

105600 / 130 = P2

P2 = 811.08 mmHg

Therefore, the final pressure is approximately 811.08 mmHg.

The correct description for IBr2 is nonlinear with lone pairs on the I atom.

IBr2 refers to the molecule iodine dibromide. In IBr2, the central iodine (I) atom is bonded to two bromine (Br) atoms. To determine the molecular geometry, we need to consider the electron pair arrangement and the presence of lone pairs on the central atom.

In the case of IBr2, iodine (I) has seven valence electrons. The two bromine (Br) atoms contribute one electron each, making a total of nine valence electrons. When we distribute the electrons around the iodine atom, we find that there are three electron pairs: two bonding pairs with the bromine atoms and one lone pair on the iodine atom.

Based on the VSEPR (Valence Shell Electron Pair Repulsion) theory, the presence of one lone pair causes electron-electron repulsion, resulting in a bent or nonlinear molecular geometry. Therefore, IBr2 has a nonlinear or bent shape with lone pairs on the iodine (I) atom.

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Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

Answer:

2mg+2hcl------>mgcl2+h2

Answer: When magnesium reacts with hydrochloric acid, it produces magnesium chloride and hydrogen gas. To write the formula for this reaction, we first need to identify the elements involved and their respective chemical symbols. The chemical symbol for magnesium is Mg, the symbol for hydrochloric acid is HCl, and the symbol for hydrogen is H.

Next, we need to balance the equation by making sure that the number of atoms of each element is the same on both sides of the arrow. In this case, we have one atom of magnesium on the left side of the arrow and one atom of hydrogen on the right side. However, we also have one atom of chlorine on the left side and two atoms of hydrogen on the right side. To balance the equation, we need to add a coefficient of 2 in front of the HCl on the left side, so that the equation becomes:

Mg + 2 HCl -> MgCl2 + H2

This balanced equation shows that for every one atom of magnesium that reacts with two atoms of hydrochloric acid, two atoms of magnesium chloride and two atoms of hydrogen gas are produced.

Nitroglycerin transdermal patches can be used in the management of angina and can deliver therapeutic dosages for up to 24 hours. These patches contain nitroglycerin and are applied to the skin to provide continuous delivery of nitroglycerin.

Nitroglycerin is a vasodilator that dilates blood vessels and helps improve blood flow. Nitroglycerin can help reduce the frequency and severity of angina attacks by dilating the arteries in the heart, which increases blood flow to the heart and reduces the workload of the heart.Due to the skin's characteristics, the nitroglycerin transdermal patch slowly releases nitroglycerin into the bloodstream over an extended period of time. The duration of the action of a nitroglycerin transdermal patch is usually 24 hours, and the drug is absorbed through the skin.The medication's therapeutic effect lasts for around 14 hours on average, with the remaining ten hours serving as a drug-free period. After removal of the nitroglycerin patch, the effect of the medication begins to wear off within hours, typically four to six hours.Because of its long duration of action, nitroglycerin transdermal patches are particularly beneficial for individuals who have angina symptoms that occur regularly and can cause discomfort throughout the day.

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The two ions present in the solution are:

1. Sodium ion, Na⁺

2. Hydroxide ion, OH¯

The correct answer to the question is the 3rd option. The sodium ion is positive, and the hydroxide ion is negative.

Ions are atoms or group of atoms which possess an electric charge.

Aqueous Sodium hydroxide, NaOH contains sodium ion and hydroxide ion.

The sodium ion is positive while the hydroxide ion is negative as illustrated below:

NaOH(aq) —> Na⁺(aq) + OH¯(aq)

From the illustration above, we can conclude that the correct answer to the question is the 3rd option. The sodium ion is positive, and the hydroxide ion is negative.

Please see attached photo for further details

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The most accurate value for the boiling point of water is about 102°.

The term accuracy refers to the fact that the value is close to the accepted or the true value. The term precision refers to how closely bound together the values in a replicate measurement are.

Having said that, we can see that the most accurate value for the boiling point of water is about 102°. In the case of second question, the table is not shown hence the question can not be answered.

For the third question, we know that the value of the load that the roller coaster can carry is 1686.5 kg, when the sign says that the roller coaster can carry as much as 1700 kg, the roller coaster could become overloaded and become harder to move.

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The rate law for the reaction \(\[H_2(g) + I_2(g) \rightarrow 2\,HI(g)\]\) is Rate = \(k [H_2]^1 [I_2]^2\), where [\(H_2\)] represents the concentration of \(H_2\) and [\(I_2\)] represents the concentration of \(I_2\). The rate constant (k) for the reaction is approximately \(80 M^{-2} s^{-1\).

To determine the rate law and rate constant for the reaction: \(\[H_2(g) + I_2(g) \rightarrow 2\,HI(g)\]\), we can use the given experimental data.

By comparing the initial rates at different concentrations of reactants, we can determine the order of the reaction with respect to each reactant.

Looking at the given data, we can see that when the initial concentration of \(H_2\) doubles from 0.01 M to 0.02 M (a factor of 2), the initial rate also doubles from 0.04 to 0.08 (a factor of 2). This suggests that the reaction is first order with respect to \(H_2\).

Similarly, when the initial concentration of \(I_2\) doubles from 0.05 M to 0.10 M (a factor of 2), the initial rate increases by a factor of 4 from 0.04 to 0.16. This indicates that the reaction is second order with respect to \(I_2\).

Therefore, the rate law for the reaction can be expressed as follows:

Rate = \(k [H_2]^1 [I_2]^2\)

To determine the value of the rate constant (k), we can choose any set of data and substitute the values into the rate law equation. Let's use the data from the third run:

[H2] = 0.03 M

[I2] = 0.05 M

Rate = 0.12 M/s

Substituting these values into the rate law equation, we have:

\(0.12 = k (0.03)^1 (0.05)^2\)

Simplifying the equation, we get:

0.12 = k (0.0015)

Solving for k, we find:

k = 0.12 / 0.0015

\(k = 80 M^{-2} s^{-1\)

Therefore, the rate law for the reaction is Rate = \(k [H_2]^1 [I_2]^2\), and the rate constant (k) is approximately \(80 M^{-2} s^{-1\).

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Answer:

Chemical Properties:

Flammability, reacts with oxygen, neutralizes a base

Physical Properties:

Boiling point , colour, mass, a solid or precipitate forms, density

Answer: Without the Sun's rays, all photosynthesis on Earth would stop. All plants would die and, eventually, all animals that rely on plants for food — including humans — would die, too..

Acetic acid donates only the hydrogen atom bonded to the oxygen atom, because the oxygen is more electronegative and better accommodates a negative charge after the bond is broken.

In acetic acid, there are 4 hydrogen atom, but it acts as a monoprotic acid. Three of the hydrogen atoms is bonded to the carbon atom and one hydrogen atom is bonded to the oxygen atom. The electronegativity difference between carbon and hydrogen is much less than that between oxygen and hydrogen.

As a highly electronegative atom, oxygen tends to pull the electrons in the O-H bond to itself. Due to this, the hydrogen will be loosely bound compared to that bonded with carbon. Also the oxygen is capable of accommodating the  negative charge after the bond is broken.

So acetic acid is a monoprotic acid and only one hydrogen gets donated.

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Answer:

9.0g

Whabshsbzhz sbsj dhbxjsbxjz sbsbbsbsjs

Explanation:

cause I believe

Dipole-induced dipole forces must be overcome between br2 when liquid br2 dissolves into ethanol.

In contrast to C2H5OH, which is a very polar molecule, bromine is non-polar and has zero dipole moment. Charges are separated within polar molecules.

When a nonpolar Br2 molecule interacts with a polar C2H5OH molecule, one half of the bromine molecule acquires a charge and the other half acquires an opposing charge. A dipole is created when two adjacent bromine molecules have different charges. Bromine molecules must thus overcome the intermolecular forces—also known as dipole-induced dipole forces—that form in order to dissolve in ethanol.

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Answer:

a.)cations; free to move around

b.)cations; fixed in place

The statement, that describes the appropriate number of significant figures is "11.345."

Significant figures represent figures of value that have relevance in terms of measuring resolution. In positional notation, significant figures are digits in a number that are dependable and necessary to express the quantity of something.

The quantity of digits in a measurement, usually a measurement, that contribute to the value's accuracy.

Significant figures

= 15.225 - 3.88

= 11.345

It has 5 significant figures.

Hence the correct answer is 11.345.

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