How does the molar heat of vaporization compare to the molar heat of fusion for a substance?.

A double replacement equation will not result in a reaction if both products are soluble.

When two ionic compounds exchange ions to create two new ionic compounds, this is known as a double replacement reaction. An illustration of this kind of answer is the following: AD + CB + CD + AB.

Since salt is an insoluble substance that won't dissolve in water, we use the symbol (s) for solid. If there had been no precipitate formation, the silver, fluoride, potassium, and chloride ions would have in fact relocated to a different site, but they would still be floating around as ions. In this case, nothing happens.

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Answer: the reactions shifts to the right (products) to produce fewer moles of gas

Explanation:

acellus confirmed

The equilibrium will shift to the right, favoring the formation of more SO₃(g) to reduce the pressure.

According to Le Chatelier's principle, when a system at equilibrium is subjected to a change in temperature, pressure, or concentration of reactants/products, the system will adjust itself to counteract the change and reestablish equilibrium.

In the given reaction, the total number of moles of gas on the left side (2 moles of SO₂ and 1 mole of O₂) is greater than the total number of moles of gas on the right side (2 moles of SO₃). When the container is shrunk to 2.5 L, the volume is reduced, resulting in an increase in pressure.

To counteract the increase in pressure, the equilibrium will shift to the side with fewer moles of gas. In this case, the equilibrium will shift to the right (forward direction), favoring the formation of more SO₃(g). By producing more SO₃, the system effectively reduces the number of moles of gas, thereby decreasing the pressure to reestablish equilibrium.

This shift to the right will increase the concentration of SO₃(g) and decrease the concentrations of SO₂(g) and O₂(g) until a new equilibrium is reached in the smaller 2.5 L container. As a result of this change, more SO₃(g) will be produced, and the reaction will release more heat (198 kJ) to maintain the new equilibrium state.

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Given :

A chemical equation :

H₂O₂ → H₂O + O₂

Solution :

We can see that there are 2 oxygen atoms in LHS and 3 on RHS .

So, we can reduce the oxygen atoms to two in THS by just dividing it by 2.

H₂O₂ → H₂O + \(\dfrac{1}{2}\)O₂

Now, multiplying both sides by 2, we get :

2H₂O₂ → 2H₂O + O₂

Therefore, the balanced chemical equation is 2H₂O₂ → 2H₂O + O₂ .

Answer:

5 valence electrons

Explanation:

Phosphorus is in group VA so it has 5 valence electrons and Oxygen is in group VIA so each oxygen has 6 valence electrons.

The standard enthalpy change of the explosive reaction is -11408 kJ/mol.

The standard enthalpy change of the reaction can be calculated using the enthalpy of formation values of the reactants and products.

The enthalpy of the formation of ammonium nitrate (NH4NO3) is -393.5 kJ/mol, the enthalpy of the formation of the fuel oil (C10H22) is -249.7 kJ/mol, the enthalpy of the formation of oxygen (O2) is 0 kJ/mol.

The enthalpy of the formation of nitrogen (N2) is 0 kJ/mol, the enthalpy of the formation of water (H2O) is -285.8 kJ/mol, and the enthalpy of the formation of carbon dioxide (CO2) is -393.5 kJ/mol.

The equation for the explosive reaction is 3NH4NO3(s)+C10H22(l)+14O2(g)>3N2(g)+17H2O(g)+10CO2(g). Therefore, the standard enthalpy change of the reaction can be calculated using the following equation:

ΔH = [3(-393.5) + (-249.7) + (14*0) + (3*0) + (17*-285.8) + (10*-393.5)] - [3(-393.5) + (-249.7) + (14*0)]

ΔH = -11408 kJ/mol.

Therefore, the standard enthalpy change of the explosive reaction is -11408 kJ/mol.

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The complete question is attached below.

5761.09L

According to the ideal gas equation

where:

• P is the ,pressure ,of the gas in atm

• V is the, volume ,in litres

• n is the mole of hydrogen gas

• R is the ,gas constant

• T is the, temperature ,in Kelvin

Given the following parameters

P = 1.05atm

R = 0.082057 L*atm/mol*K

T = 55 + 273 = 328K

Determine the mole of hydrogen

Determine the required volume

Hence the required volume of the gas is approximately 5761.09L

The major product expected from the sequential reaction of cyclopentene with \(Br_{2} /H_{2} O\) , followed by sodium hydroxide is cyclopentene epoxide.

The treatment of cyclopentene with  \(Br_{2} /H_{2} O\)  which is known as bromine water is an electrophilic substitution reaction.

In the first step the bromine molecule and the water molecule reacts each other and leads to formation of the bromohydrines . After that bromohydrines  will break and we get halide anion i.e., bromine anion because bromine is more electronegativity and hydrin as a cation.

The cyclopentene will react with bromohydrin to give trans-2-bromopententanol and after reaction with base it give cyclopentane epoxide .

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The ion that has 26 protons, 28 neutrons, and 24 electrons is Iron (Fe) (option c).

An element can be determined by the number of protons in the nucleus of its atom. The number of protons present in an atom is referred to as the atomic number of the element.

This means that the number of protons in an atom is unique to a specific element.

Iron (Fe) has 26 protons in the nucleus of its atom.

Therefore, an ion with 26 protons is an ion of the element iron (Fe).

Magnesium (Mg) has 12 protons, Chromium (Cr) has 24 protons, Xenon (Xe) has 54 protons and Nickel (Ni) has 28 protons.

Thus, an ion which has 26 protons, 28 neutrons, and 24 electrons  is Fe (option c)

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Explanation:

I think its boron because boron is no. 5 on the periodic table, and it has a two energy levels with three valence electrons

Boron is the element which has three valence electrons and  two energy levels.

Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.

Energy of the stationary state is given as E= -R

1/n² where R

is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.

They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.

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Answer:

D

Explanation:

Solvent is the material that is dissolving another material​. Thus, option D is correct.

A solvent is a substance that dissolves another substance to form a solution. The substance that is being dissolved is called the solute, and the substance that is doing the dissolving is called the solvent. The solute is usually present in a smaller amount than the solvent, and it is the solvent that determines the physical properties of the solution, such as its density, viscosity, and boiling point.

For example, when salt is dissolved in water, the salt is the solute and the water is the solvent. The water molecules surround the salt molecules and break them apart, so that the salt ions are free to move around in the solution. The solution is then a homogeneous mixture of salt ions and water molecules.

Thus, option D is correct.

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(i) True. If f(n) E O(n) and g(n) E O(n), then it implies that there exist constants c1 and c2 such that f(n) ≤ c1n and g(n) ≤ c2n for all n > N, where N is some positive integer. Thus, f(n) + g(n) ≤ c1n + c2n = (c1 + c2)n for all n > N. This means f(n) + g(n) is bounded above by a constant multiple of n, i.e., f(n) + g(n) E O(n).

(ii) True. If f(n) E O(n), then it implies that there exists a constant c such that f(n) ≤ cn for all n > N, where N is some positive integer. Thus, n² x f(n) ≤ cn x n² = cn³ for all n > N. This means n² x f(n) is bounded above by a constant multiple of n³, i.e., n² x f(n) E O(n³).

(iii) True. If f(n) E O(n) and g(n) E O(n²), then it implies that there exist constants c1 and c2 such that f(n) ≤ c1n and g(n) ≤ c2n² for all n > N, where N is some positive integer. Thus, f(n) x g(n) ≤ c1n x c2n² = c1c2n³ for all n > N. This means f(n) x g(n) is bounded above by a constant multiple of n³, i.e., f(n) x g(n) E O(n³).

(iv) True. If f(n) € Θ(n log n), then it implies that there exist constants c1, c2, and N such that c1n log n ≤ f(n) ≤ c2n log n for all n > N. Thus, f(n) x n ≤ c2n² log n for all n > N. Since n^2 log n → ∞ as n → ∞, it follows that f(n) x n e o(n² log n).

(v) False. Consider f(n) = n log n and g(n) = n log n. Both f(n) and g(n) € Θ(n log n), but their product f(n) x g(n) = n² (log n)² € Θ(n² (log n)²), which is not constant.

(vi) False. Consider f(n) = n and g(n) = n. Both f(n) E Ω(n) and g(n) E Ω(n), but limn→∞ f(n) / g(n) = 1, which is not equal to any positive constant.

Overall, it is important to understand and apply the properties of asymptotic notation correctly to analyze the behavior of functions and algorithms as the input size grows.

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Milk

Explanation:

because milk is very thick youknow here I go

Carbon atoms weigh 12.01g/mol in a mole.

12 grams of pure carbon-12 contain exactly one mole's worth of atoms (C-12). 12g of C-12 is equal to 1 mole, or 6.022 10²³ atoms.

On Earth, a compound's molar mass, which is also known as its molecular weight, is just the total mass of its constituent elements. The amount of matter in a substance or an object is measured by its mass. The kilogram (kg) is the fundamental SI unit of mass, while lower masses can also be measured in grams (g).

A substance's mole is equivalent to 6.022 x 10²³ of that material (such as atoms, molecules, or ions). The term "Avogadro's number" or "Avogadro's constant" refers to the number 6.022 10²³ .

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The polyatomic ion that carries a positive charge is the ammonium ion ( NH 4 + ) .

In general , Polyatomic ions are having important formulas, names, and charges that should be memorized. During formation of ammonium ion, these nitrogen atom helps to gains a positive charge when they loose lone pair of electrons. When ammonium ion carries a positive charge, then it is  known as ammonium cation.

Hence, when special type of ionic compound is embellished by ammonium nitrate (NH4NO3), that contains two polyatomic ions, NH4+ and NO3−. So the polyatomic ion is a charged and composed of several atoms bound together.

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The percent yield for the reaction is 84.6%.

To calculate the percent yield for the reaction, we first need to determine the theoretical yield of CO₂ based on the balanced chemical equation for the reaction:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

From the equation, we can see that for every mole of C₃H₈ , 3 moles of CO₂ are produced. So, to determine the theoretical yield of CO2, we need to first convert the mass of C₃H₈ to moles and then multiply that by the stoichiometric ratio for CO₂.

The molar mass of C₃H₈ is 44.1 g/mol, so:

3.66 g C₃H₈ / 44.1 g/mol = 0.083 mol C₃H₈

Using the stoichiometry of the reaction, we can now calculate the theoretical yield of CO₂:

0.083 mol C₃H₈ × 3 mol CO₂ / 1 mol C₃H₈ = 0.25 mol CO₂

And the theoretical mass of CO₂:

0.25 mol CO₂ × 44.01 g/mol = 11.0025 g CO₂

Finally, the percent yield of the reaction can be calculated as:

9.31 g CO₂ / 11.0025 g CO₂ × 100% = 84.6%

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Answer:

Rust is a chemical reaction (oxidation) of iron that occurs over a period of time as the bare metal surface comes in contact with oxygen present in the air or water. Rust "eats" away the metal, rendering it weak and fragile. ... Avoid contact with water or moisture.

A catalyst can cause a reaction to occur that does not normally happen at room temperature by reducing the activation energy needed to undergo the reaction.

Catalysts are substances, often enzymes, used to speed up or commence a chemical reaction. They do this by reducing the necessary energy amount needed to begin the reaction, known as activation energy, or simply by changing the way in which the reaction takes place, which can allow for a reaction to take place even at room temperature when it would otherwise not occur.  

Therefore, we can confirm that a catalyst can cause a reaction to occur that does not normally happen at room temperature by reducing the activation energy needed to undergo the reaction.

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The formal charge of an atom in a molecule or polyatomic ion can be calculated using the following equation:

Formal Charge = Valence electrons - Non-bonding electrons - 1/2 (Bonding electrons)

where:

Valence electrons are the number of electrons an atom has in its outermost (valence) shell.

Non-bonding electrons are the number of electrons that an atom has which are not involved in bonding with other atoms in the molecule.

Bonding electrons are the number of electrons that an atom shares with other atoms in covalent bonds.

To use the equation, first count the number of valence electrons for the atom in question. Then count the number of non-bonding electrons on the atom, as well as the number of electrons that the atom shares in covalent bonds with other atoms. Finally, plug these numbers into the equation to calculate the formal charge.

The formal charge can help to determine the most stable arrangement of electrons in a molecule or ion. In general, atoms with a formal charge of zero or close to zero are more stable than those with higher formal charges.

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A property of water is that it requires less heat than ethanol to raise its temperature.

Among the given options, the property of water that stands out is that it requires less heat than ethanol to raise its temperature. This property is known as the high specific heat capacity of water.

Water has a relatively high specific heat capacity compared to many other substances, including ethanol.

This means that it takes a larger amount of heat energy to raise the temperature of water compared to ethanol for the same mass of the substance.

The high specific heat capacity of water is attributed to hydrogen bonding between water molecules.

These hydrogen bonds result in a significant amount of energy being required to break the intermolecular forces and raise the temperature of water. As a result, water can absorb and store a considerable amount of heat energy without undergoing a significant temperature change.

In contrast, ethanol has a lower specific heat capacity, meaning it requires less heat energy to increase its temperature compared to water.

This property of water plays a vital role in regulating Earth's temperature and climate, as water bodies can absorb and release heat energy, helping to moderate temperature changes in the environment.

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Answer:

1: each hydrogen atom shares an electron to form a covalent bond

Explanation:

I took the quiz and this was correct!

The nuclear binding energy per nucleon is the energy required to break apart a nucleus into its constituent protons and neutrons. As the atomic mass number a increases, the number of protons and neutrons in the nucleus increases, which leads to an increase in the nuclear binding energy per nucleon.

Up to a certain point, this increase is due to the strong nuclear force, which is responsible for holding the protons and neutrons together in the nucleus. However, as the atomic mass number a continues to increase, the repulsive electromagnetic force between the protons becomes stronger than the attractive strong nuclear force.
This causes the nuclear binding energy per nucleon to decrease, as the protons in the nucleus repel each other and require more energy to remain bound together. This decrease continues until approximately 8.8 MeV per nucleon, after which the nuclear binding energy per nucleon begins to increase again.
This increase is due to the increasing number of neutrons in the nucleus, which act to stabilize the nucleus and increase the strength of the strong nuclear force. However, the increase in nuclear binding energy per nucleon is not as great as it was before, as the repulsive electromagnetic force continues to exert its influence.
In summary, the nuclear binding energy per nucleon increases up to 8.8 MeV due to the strong nuclear force, but decreases thereafter due to the repulsive electromagnetic force. The increase that occurs after this point is due to the increasing number of neutrons, which partially offset the repulsive force between the protons.

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The rate of chemical reaction in the body is controlled by enzymes

Chemicals go into the body. They enter the body through the mouth, the throat, or (less frequently) the skin. Several are essential to the procedures mentioned above. Some can cause illness or disease because they are "foreign" to the body.

Chemical substances go through typical chemical reactions within the body, including neutralization, hydrolysis, oxidation, and reduction. But they are not random.

Each, however, is a component of a metabolic process. Anabolism, in which the body builds molecules via anabolic pathways, and catabolism, in which the body breaks down molecules through catabolic pathways, are two different types of metabolism.

All are regulated by an assembly of proteins known as enzymes. Biochemical catalysts are called enzymes to change the rate at which reactions occur. But unlike the majority of chemical catalysts, enzymes are extremely selective, promoting just certain responses.

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C4H9OH is the substrate, Br- is the nucleophile and H2O is the leaving group.

In an SN1 reaction, the rate limiting step is the formation of the carbocation. The carbocation is formed as water which is the leaving group departs. After the leaving group departs, the nucleophile (Br-) attacks to yield the major organic product. The protonation of the -OH group  is the first step in the reaction.

It then follows that, C4H9OH is the substrate, Br- is the nucleophile and H2O is the leaving group.

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Answer: The stage of metamorphosis this occurs is called the PUPA stage. The correct option is D.

Explanation:

Metamorphosis can be defined as the change in form, mode of life and behaviour that occurs during embryonic development of an organism. In the metamorphosis of insects, which mostly reproduce sexually, insects can be grouped according to the way the eggs develop into adults. Some show:

--> Complete metamorphosis or

--> Incomplete metamorphosis.

In the life cycle of a butterfly, a COMPLETE metamorphosis occurs. This is because after fertilization, the EGG hatches into LARVA which passes through a PUPAL stage before becoming transformed into an ADULT insect. That is:

Egg --> Larva --> Pupa --> Imago.

When the caterpillar, which is the Larva stage, has reached its full size, it spins a pad of silk on a twig. It moves upward and attached it's clasper to this pad. It spin another silk thread at the thorax. These aids it to assume a slanting position with the head end pointing upwards. The pupa stage called the CHRYSALIS is reached when it tucks it's head under its thorax, arches it's body, shortens and broadens, and moults for the last time. Therefore the correct option is D (pupa).

Answer:

The answer is D. Pupa

Answer:

false

Explanation:

Answer:

False.

Explanation:

The sum of potential energy and the kinetic energy of an object is mechanical energy.

Hope that this helps!!! :)

Answer:

brainless me plss i help you out

The new pressure of the gas is approximately 838.74 torr.

To determine the new pressure of the gas, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional when the temperature remains constant.

According to Boyle's Law, P1 * V1 = P2 * V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

Given:

Initial volume (V1) = 516 ml

Initial pressure (P1) = 345 torr

Final volume (V2) = 213 ml

Using the formula and plugging in the values:

345 torr * 516 ml = P2 * 213 ml

Simplifying the equation:

P2 = (345 torr * 516 ml) / 213 ml

Calculating the value:

P2 ≈ 838.74 torr

Therefore, the gas now has a pressure of approximately 838.74 torr.

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Answer:

the science behind this is 45

Explanation:

you times it by 4N²

divide it by ⁶Mn