Which statement about the temperatures of phase changes and electrostatic forces holding the molecules is correct?(1 point)
The strength of the forces between molecules in a substance is strongest at higher temperatures
The temperatures at which a substance changes phases is dependent of the size of the molecules in the substance.
The strength of the forces between molecules in a substance depends on the number of filled electron shells
The temperatures at which a substance changes phases indicate the relative strength of the forces between molecules in the substance.

Which list shows the phases of matter in order from strongest collective electrostatic forces to weakest collective electrostatic forces? (1 point)

liquid, solid, gas
gas, liquid, solid
solid, liquid, gas
gas, solid, liquid

Which change happens when water boils?(1 point)
The forces between water molecules and the bonds between the atoms in the water molecules break.
The forces between water molecules break, and the bonds between the atoms in water are unchanged.
The forces between water molecules are unchanged, and the bonds between the atoms in the water break.
The forces between water molecules become stronger, and the bonds between atoms in the water remain unchanged.

A sample of calcium carbonate is cooled. Which change happens to the molecules of calcium carbonate in the sample?(1 point)
The molecules break apart and then form stronger forces.
The molecules vibrate more and weaken the forces.
The forces weaken, and the molecules move around.
The forces strengthen, and the molecule structure becomes more rigid.
The boiling point of acetone is lower than the boiling point of ethanol. Based on this information, which conclusion can be drawn about the two substances?(1 point)
The intermolecular forces in ethanol are stronger than the intermolecular forces in acetone.
The intramolecular bonds in ethanol are stronger than the intramolecular bonds in acetone.
The intramolecular bonds in acetone are stronger than the intramolecular bonds in ethanol.
The intermolecular forces in acetone are stronger than the intermolecular forces in ethanol.

Answer: The ratio of mass of sulfur atom to mass of oxygen atom in sulfur dioxide is 1: 1.

Explanation:

Law of constant proportion states that In a chemical substance the elements are always present in definite proportions by mass. This law is also known as 'Law of definite proportions '.

Mass of 1 atom of sulphur = 32 g

Mass of 1 atom of oxygen = 16 g

Mass of 2 atoms of oxygen =\(16g\times 2=32g\)

In formation of \(SO_2\) , 1 atom of sulfur combines with 2 atoms of oxygen and thus the mass ratio will be 32: 32= 1:1 .

Thus the ratio of mass of sulfur atom to mass of oxygen atom in sulfur dioxide is 1: 1.

The major organic product obtained from the reaction between LiAlH₄ and H₃O⁺ is an alcohol.

LiAlH4, also known as lithium aluminum hydride, is a powerful reducing agent commonly used in organic synthesis. It can reduce a variety of functional groups, such as carbonyl compounds, to their corresponding alcohols. In this reaction, LiAlH₄ first reduces the carbonyl group (C=O) to a hydroxyl group (C-OH), resulting in the formation of an alkoxide intermediate. Then, the addition of  H₃O⁺ (water) hydrolyzes the alkoxide, converting it into an alcohol.

The specific alcohol product will depend on the starting carbonyl compound used. For example, if the starting compound is a ketone, the major product will be a secondary alcohol. If the starting compound is an aldehyde, the major product will be a primary alcohol, it is important to note that LiAlH₄ is a strong reducing agent and should be handled with care due to its reactivity. So therefore the major organic product obtained from the reaction between LiAlH₄ and  H₃O⁺ is an alcohol.

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Answer:

D is the answer

Explanation:

Answer:

something cyan colored?

The substance that contains elements chemically combined in a fixed proportion is called a compound.

In a compound, the elements are bonded together through chemical bonds such as ionic bonds, covalent bonds, or metallic bonds. The atoms in a compound are arranged in a specific and predictable manner, forming a unique chemical formula that represents the elemental composition of the compound.

For example, water (H2O) is a compound composed of two hydrogen atoms (H) and one oxygen atom (O). The ratio of hydrogen to oxygen in water is always 2:1. Regardless of the source or method of production, the ratio of hydrogen to oxygen atoms in water remains constant.

Similarly, sodium chloride (NaCl) is a compound made up of one sodium atom (Na) and one chlorine atom (Cl). The ratio of sodium to chlorine in sodium chloride is always 1:1.

The fixed proportion of elements in a compound is a fundamental characteristic of chemical compounds and is a result of the specific arrangement and bonding of the atoms within the compound. This fixed proportion allows compounds to have unique properties and behaviors that differ from those of the individual elements composing them.

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Step 1 - Understanding the definition of molar concentration

Molar concentration (M or mol/L) is defined as the quotient between the number of moles (n) and the total volume of the solution (V):

Therefore, if the volume of the solution and its final concentration are known, we can use the equation to find the required number of moles.

Step 2 - Finding the required number of moles

The solution's concentration is 0.46 M and its volume is 250 ml. The volume must always be used in L, so:

Therefore, 0.115 moles would be required.

Answer:

The formula is Na2C2O4

Explanation:

I hope this helps

Answer :

a chemical equation in

which the electrolytes in aqueous

solution are expressed as dissociated

ions.

Have good day !!

Answer:

protons, neutrons, electrons

Answer:

Atoms consist of 3 particals:Protons,Neutrons,and Electrons

Answer:

false, Rutherford's experiment proved the nucleus being positive and dense.

80g•1moles/68.94g= 1.16g

Zn as a limiting reactant

N₂ as an excess reactant

Theoretical Yield : 13.15 g

Reaction

3 Zn + N₂ ⇒ Zn₃N₂

Ar Zn : 65,38 g/mol

Ar N₂ : 28.0134 g/mol

mol Zn

\(\tt \dfrac{11.5}{65.38}=0.176\)

mol N₂

\(\tt \dfrac{9.55}{28.0134}=0.341\)

limiting reactant : the smaller ratio(mol:coefficient)

mol ratio Zn : N₂ :

\(\tt \dfrac{0.176}{3}\div \dfrac{0341}{1}=0.0586\div 0.341\)

Zn as a limiting reactant(smaller ratio)

N₂ as an excess reactant

mol Zn₃N₂ :

\(\tt \dfrac{1}{3}\times 0.176=0.0586\)

mass of Zn₃N₂ (Theoretical Yield) :

\(\tt 0.0586\times 224.154~g/mol=13.15~g\)

The total heat absorbed by the 5.0-gram sample of ammonia during the time interval is 735.7 J.

Given that the mass of ammonia (NH3) sample is 5.0 g.

The time interval absorbed is 11.0 seconds. The enthalpy change of the calorimeter is -14.2 J/°C.

The specific heat of the calorimeter is 8.2 J/g°C.

Therefore, the total heat absorbed by the 5.0-gram sample of ammonia during the time interval is;

ΔT = T final − T initial(25.5 °C − 21.3 °C) = 4.2°

Cheat absorbed = (5.0g) (4.2°C) (35.1 J/g°C)

heat absorbed = 735.7 J

The total heat absorbed by the 5.0-gram sample of ammonia during the time interval is 735.7 J.

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Answer

moles = 5.81 mol

Explanation

Given:

Volume = 144 L

AT SATP

1 mole = 24.4651 L

Solution:

1 mole = 24.4651 L

x mole = 144 L

x = 144/24.4651

x = 5.8 mol

Answer:

I think it would be D

Explanation:

Answer:

The number of outer shell electrons determines the group number of the element. The number of occupied principle quantum shells (energy levels) determines the period of the element. The proton number determines the element itself and its position.

Explanation:

Answer:

Word equation carbon + oxygen → carbon dioxide

Chemical equation C + O2 → CO2

The volume of 0.00703 mol of neon gas under the same temperature and pressure as 0.00901 mol of neon gas occupying 242 ml is 188 ml.

According to the Ideal Gas Law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

Assuming that the temperature and pressure are constant, we can set up a proportion to find the volume of 0.00703 mol of neon gas:

0.00901 mol neon / 242 ml = 0.00703 mol neon / x

Solving for x, we get:

x = (0.00703 mol neon * 242 ml) / 0.00901 mol neon

x = 188 ml

Therefore, the volume of 0.00703 mol of neon gas under the same conditions is 188 ml.

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geothermal energy, form of energy conversion in which heat energy from within Earth is captured and harnessed for cooking, bathing, space heating, electrical power generation, and other uses.

Answer:

it can use for you wanted to do and we can use it for our wants...

Explanation:

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⠀⠀█ █

⠀⠀◤ ◥

BTS

NMR signals may consist of a single peak, be split into several peaks, which is known as multiplicity.

The number of peaks of NMR and their relative intensities provide information about the chemical environment of the nuclei being observed. Multiplicity arises from spin-spin coupling between the observed nucleus and one or more neighboring nuclei. This coupling occurs because the magnetic field generated by the neighboring nuclei affects the local magnetic field experienced by the observed nucleus. The pattern of multiplicity can provide valuable information about the number and types of neighboring nuclei and the nature of the chemical bonds between them.

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ANSWER

All reactants

OPTION D

STEP-BY-STEP EXPLANATION:

Firstly, you need to know the meaning of the solution

Solution: Solution is defined as a homogenous mixture of two or more components in which particle size is smaller than 1nm.

Solution = solute + solvent

The solute is a substance that is dissolved in the solvent.

An aqueous solution is defined as a solution in which its solvent is water

As you can see from the above-balanced chemical equation, the solutions in the reaction have a subscript (aq) attached to them.

Also, from the reaction, the compounds that are in reactions are the reactants only which are HClO (aq) and HCl (aq)

Hence, the answer is all reactants -------- OPTION D

Answer:

p=27.8atm

Explanation:

P = 27.8atm

At what temperature will 5.00 g of Cl2 exert a pressure of 900. mmHg at a volume of 750.

Answer:

If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result? Total energy increases.

Answer:

its C energy of motion decreases

Explanation:

i got it right on the edge 2021 unit test UvU

and if u dont trust me then get it rong with the other person （︶^︶）

To draw the major organic product when each reagent is added to 3,3-dimethylbutane, it's essential to know the specific reagents involved. Unfortunately, you didn't provide the reagents list. Please provide the list of reagents, and I'll gladly help you with the major organic products for each reaction.

Dimethylbutane, also known as diisopropyl, is an isomer of hexane. Has the chemical formula (CH₃)₂CHCH(CH₃)₂ It is a colorless liquid that boils at 57.9 °C.  2,3-dimethylbutane is a flammable liquid and is insoluble in water. Vapors from 2,3-dimethylbutane explode when mixed with air.

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a. The balanced equation for the reaction between magnesium (Mg) and chlorine gas (Cl₂) is:
Mg + Cl₂ → MgCl₂
b. The limiting reactant, chlorine gas (Cl₂) is the limiting reactant in this reaction.

For the reaction between magnesium and chlorine gas, the balanced equation is:
Mg + Cl2 -> MgCl2
To determine which substance limits the reaction, we need to calculate the number of moles of each substance.
The molar mass of magnesium is 24.31 g/mol, so 2.0 g of magnesium is equal to 0.0822 moles.
The molar mass of chlorine is 35.45 g/mol, so 5.0 g of chlorine gas is equal to 0.1409 moles.
To find the limiting reactant, we compare the number of moles of each substance. In this case, magnesium is the limiting reactant because there are fewer moles of magnesium (0.0822) than chlorine (0.1409).
In 100 words, we can say that the balanced equation for the reaction between magnesium and chlorine gas is Mg + Cl2 -> MgCl2. To determine the limiting reactant, we need to calculate the number of moles of each substance. 2.0 g of magnesium is equal to 0.0822 moles and 5.0 g of chlorine gas is equal to 0.1409 moles. Since there are fewer moles of magnesium, it is the limiting reactant. This means that the reaction will stop when all of the magnesium is used up and there will be some excess chlorine gas left over. It is important to know the limiting reactant in order to calculate the maximum amount of product that can be formed.
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To carry out the bromination of benzene via an electrophilic aromatic substitution reaction, the following reagents are necessary: Bromine Br2, Lewis acid catalyst (Iron Bromide), organic solvent (tetrachloride).

1. Bromine (Br2) as the electrophile
2. Lewis acid catalyst such as iron (III) bromide (FeBr3) or aluminum bromide (AlBr3) to activate the bromine and enhance the electrophilicity of the system.
3. An organic solvent such as carbon tetrachloride (CCl4) or chloroform (CHCl3) to dissolve the reactants and provide a medium for the reaction to occur.
Bromine (Br2): This provides the bromine atom for substitution on the benzene ring. A Lewis acid catalyst, such as Iron(III) bromide (FeBr3) or Aluminum bromide (AlBr3): This helps generate the electrophilic bromine species and activates the benzene ring for the substitution reaction.
With these reagents, you can perform the bromination of benzene successfully.

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The reagents necessary for the bromination of benzene via an electrophilic aromatic substitution reaction are bromine (Br2) and a Lewis acid catalyst such as iron (III) bromide (FeBr3) or aluminum bromide (AlBr3). Additionally, a solvent such as nitrobenzene or carbon tetrachloride may be used to facilitate the reaction.

1. Bromine (Br2): This is the halogen that will be introduced to the benzene ring during the reaction.
2. A Lewis acid catalyst, typically either Aluminum Bromide (AlBr3) or Iron(III) Bromide (FeBr3): This catalyst is required to generate the electrophilic bromine species that will react with the benzene ring.

Your answer: The reagents necessary for the bromination of benzene via an electrophilic aromatic substitution reaction are Bromine (Br2) and a Lewis acid catalyst, such as Aluminum Bromide (AlBr3) or Iron(III) Bromide (FeBr3).

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we find the energy to be approximately \(3.41 * 10^-19\) Joules is the answer.

To calculate the wavelength of a photon with a frequency of 61.7 MHz, we can use the formula: wavelength = speed of light / frequency. The speed of light is approximately\(3 * 10^8\) meters per second.

Converting the frequency to Hz (\(1 MHz = 10^6 Hz\)), we have \(61.7 * 10^6\)Hz.

Plugging these values into the formula, we get: wavelength =\((3 * 10^8 m/s) / (61.7 * 10^6 Hz).\)

Simplifying, we find the wavelength to be approximately 4.862 meters.

Now, to calculate the energy of a photon with a wavelength of 582.8 nm, we can use the equation: energy = Planck's constant × speed of light / wavelength.

Planck's constant is approximately \(6.63 * 10^-34\) Joule-seconds.

Converting the wavelength to meters (\(1 nm = 10^-9 m\)), we have \(582.8 * 10^-9 m.\)

Plugging these values into the equation, we get: energy =\((6.63 * 10^-34J·s) * (3 * 10^8 m/s) / (582.8 * 10^-9 m).\)

Simplifying, we find the energy to be approximately \(3.41 * 10^-19\) Joules.

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If 170 milligrams of a radioactive substance decays to 85 g after 16 hours. Then, after 21 hours, approximately 75.2 mg of the radioactive substance will remain.

The decay of the radioactive substance follows an exponential decay equation of the form:

\(N(t) = N_{o} \times e^{-kt}\)

Where:

N(t) is the amount of substance remaining at time t

N₀ is the initial amount of substance

k is the decay constant

t is the time elapsed

Given to us is N₀ = 170 mg and N(16) = 85 mg. We can use this information to find the decay constant, k.

\(85 = 170 \times e^{-k \times 16}\)

Dividing both sides by 170:

\(0.5 = e^{-k \times 16}\)

To solve for k, we can take the natural logarithm (ln) of both sides:

ln(0.5) = -k × 16

from this, the value of k comes out to be:

k = 0.0431

Now we can use the decay equation to find the amount of substance remaining after 21 hours, N(21):

\(N(21) = 170 \times e^{-0.0431 \times 21}\)

Calculating this expression:

N(21) = 75.2

Therefore, after 21 hours, approximately 75.2 mg of the radioactive substance will remain.

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