Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?
a
о
Нc— c— СТ.
Oь
o=
H— С—Н
нан
H— C— N
н н
н
0
1
— С—С
1
н н

Answer:

1.5x1020 molecules = 2.5x10-4 moles.

The products of a Diels-Alder reaction are cyclohexene derivatives, which are formed from the reaction of a diene molecule and a dienophile molecule.

The Diels-Alder reaction is a type of organic chemical reaction that forms a new carbon-carbon bond between a diene (a molecule with two double bonds) and a dienophile (an alkene molecule). This reaction is considered a type of cycloaddition reaction, where two or more unsaturated reactants combine to form a cyclic product with multiple new bonds. The Diels-Alder reaction is a powerful tool in organic synthesis and is used to create a wide range of compounds, including natural products, pharmaceuticals, and polymers. The reaction is known for its high stereoselectivity and regioselectivity, meaning that the product can be precisely controlled in terms of its configuration and the placement of functional groups. Overall, the Diels-Alder reaction is an important and widely used reaction in the field of organic chemistry.

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Answer:

(A) Blood

Explanation:

Answer:

s+o2=so2

Explanation:

i hope it will help u

Answer:

Explanation:

The conjugate acid of \(H_2PO_4\)− is option a) \(H_3PO_4.\)

The terms in this answer are "conjugate acid" and "\(H_2PO_4\).What is a conjugate acid?A conjugate acid is an acid that creates another acid by accepting a proton (H+ ion).Consider the following reaction:HF +\(H_2O\) ⇌ \(H_3O\)+ + F-The acid HF and the base F- are two conjugate acid-base pairs.

When the acid HF donates a proton (H+ ion), the base F- becomes the conjugate acid because it accepts the proton (H+ ion). \(H_3O\)+ is the conjugate acid of \(H_2O\) because it gains a proton (H+ ion) from water.Conjugate base is a species formed when an acid donates a proton. In comparison to a particular base, it has one less proton.

On the other hand, the acid and base pairs are known as a conjugate acid-base pair.In the provided options, \(H_3PO_4.\) is the only compound which can gain a proton to form the conjugate acid. Therefore, the correct option is A. \(H_3PO_4.\)

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Approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.

To solve this problem, we need to calculate the amount of heat that needs to be transferred from the water to the ice in order to lower the water temperature to 0.0°C.

First, let's calculate the initial heat content of the water. The specific heat capacity of water is 4.186 J/(g·K), and the mass of the water can be calculated using its density (1 g/mL) and volume (7.30 × 10^2 mL):

Mass of water = density × volume = 1 g/mL × 7.30 × 10^2 mL = 7.30 × 10^2 g

The initial heat content of the water can be calculated using the formula:

Heat content = mass × specific heat capacity × temperature change

Heat content = 7.30 × 10^2 g × 4.186 J/(g·K) × (25.0°C - 0.0°C) = 7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C

Next, we need to calculate the amount of heat that needs to be transferred from the water to the ice to lower the water temperature to 0.0°C. This heat transfer occurs during the melting of the ice.

The amount of heat required to melt the ice can be calculated using the formula:

Heat = mass of ice melted × latent heat of fusion

Let's assume that x grams of ice melts. The mass of the ice can be calculated using its density (0.92 g/mL) and volume (same as the volume of water):

Mass of ice = density × volume = 0.92 g/mL × 7.30 × 10^2 mL = 6.716 × 10^2 g

Heat = x g × 333.7 J/g

Now, we need to ensure that the heat transferred from the water to the ice is enough to lower the water temperature to 0.0°C. The heat transferred from the water to the ice is equal to the heat transferred from the water when its temperature drops to 0.0°C:

Heat content of water = Heat transferred to ice

7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C = x g × 333.7 J/g

Now, we can solve for x:

x = (7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C) / (333.7 J/g)

x ≈ 35.90 g

Therefore, approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.

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We can see that the ion that has a noble gas electron configuration is:

C. \(C^{2-}\)

An ion is an atom or a group of atoms that carries an electric charge. It is formed when an atom gains or loses electrons, resulting in an imbalance between the number of protons (positively charged particles) and electrons (negatively charged particles) in the atom.

When an atom gains one or more electrons, it becomes negatively charged and forms a negative ion, also known as an anion. This occurs because the atom now has more electrons than protons. Anions are represented by a negative sign (-) after the atomic or molecular symbol.

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Answer:

I don't have a paper right now so I am attaching images for b(i), (ii) and c(i)

Explanation:

c) Ionic bond is the result of strong electrostatic force of attraction between positively charged metal ion and negatively charged metal ion.

In the balanced redox reaction in a basic solution, the coefficients in front of Cl₂ and OH⁻ are 1 and 6, respectively.

Explanation: To balance the given redox reaction in a basic solution, follow these steps:

1. Identify the half-reactions (oxidation and reduction).
2. Balance the atoms in the half-reactions.
3. Balance the charges by adding electrons.
4. Equalize the number of electrons in both half-reactions.
5. Combine the half-reactions.
6. Balance the overall reaction by adding OH⁻ and H₂O molecules.

Let's consider the reaction between ClO⁻ (chlorite ion) and Cl⁻ (chloride ion) forming Cl₂ (chlorine gas).

The half-reactions are:

Oxidation: Cl⁻ → Cl₂
Reduction: ClO⁻ → Cl⁻

Now, balance the atoms and charges:

Oxidation: 2Cl⁻ → Cl₂ + 2e⁻
Reduction: 2ClO⁻ + 2e⁻ → 2Cl⁻ + 2OH⁻

Combine the half-reactions:

2Cl⁻ + 2ClO⁻ → Cl₂ + 2Cl⁻ + 2OH⁻

Remove the common species on both sides:

2ClO⁻ → Cl₂ + 2OH⁻

Conclusion: In the balanced redox reaction in a basic solution, the coefficients in front of Cl₂ and OH are 1 and 6, respectively. The balanced equation is:

2ClO⁻ → Cl₂ + 2OH⁻

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Most elements occur in compounds combined with other elements by forcing chemical bonds, which are formed by the interaction of the electrons of the atoms involved.

The ability to create molecules and crystals is made possible by a chemical bond, which is a strong attraction between atoms or ions. The connection may be created by the sharing of electrons in covalent bonds or by the electrostatic force between ions that have opposing charges. Chemical bonds can be classified into "powerful bonds" or "primary bonds" like covalent, ionic, and metallic bonds as well as "weak bonds" or "secondary bonds" like hydrogen bonding, dipole-dipole interactions, and the London dispersion force. Strong chemical bonds are created when involved atoms share or move electrons.

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Secondary amine is what it is. Option (B3-dimethylbutan-2-amine )'s is the primary organic product created during the following reaction. Thus, if more hydrogen is added to carbon, we will obtain the main product, according to the Markovnikov Rule.

As a result, the main product produced by adding hydrogen to carbon-1, which has a higher concentration of hydrogen, and adding bromine to carbon-2 is 2-bromopropane. When a reaction follows Markovnikov's rule, a chemical or product is said to be a major organic product. The tertiary alkyl iodide is the largest byproduct of the second process, which transforms alcohol into alkyl iodide, while the secondary alkyl iodide is the minor byproduct.

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The length of pipe required for the air to reach sonic velocity is approximately 127.8 meters.

To solve this problem, we can use the conservation of mass, momentum, and energy equations for an adiabatic, steady, compressible flow.

First, we can find the Mach number at the pipe inlet using the formula:

M = V / a

where V is the velocity of the air and a is the speed of sound, which can be calculated using the formula:

a = sqrt(gamma * R * T)

where gamma is the ratio of specific heats for air (1.4), R is the gas constant for air (287 J/kg-K), and T is the temperature of the air.

Plugging in the given values, we get:

T = 350 K

a = sqrt(1.4 * 287 * 350) = 472.2 m/s

V = 120 m/s

M = 120 / 472.2 = 0.254

Next, we can use the conservation of momentum equation to find the pressure drop along the pipe:

dp/dx = -rho * V^2 * dA/A * (f/4)

where dp/dx is the pressure gradient, rho is the density of air, A is the cross-sectional area of the pipe, dA/A is the fractional change in area, f is the Darcy-Weisbach friction factor, and x is the length of pipe.

We can assume that the pipe is horizontal and the friction factor is 0.02, which is the given viscosity of air at 350 K. We can also assume that the cross-sectional area of the pipe remains constant, so dA/A is 0. We can rearrange the equation and integrate to get:

x = -1/(2*f) * integral(rho * V^2 / p, M, 1)

where the integral is taken from the Mach number at the pipe inlet (0.254) to the Mach number where the air leaves sonic velocity (1).

To evaluate the integral, we need to express rho * V^2 / p in terms of Mach number. We can use the isentropic relations for an ideal gas to get:

rho * V^2 / p = (gamma / M^2) * (2 / (gamma + 1))^(gamma / (gamma - 1))

Plugging this into the integral and using the given density of air at 350 K (1.185 kg/m^3), we get:

x = -1/(2*0.02) * integral((gamma / M^2) * (2 / (gamma + 1))^(gamma / (gamma - 1)), 0.254, 1)

= 127.8 m

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I apologize, but I am unable to assist with completing the table as it requires visual representation and formatting that cannot be accommodated in a text-based conversation. It would be best to refer to your course materials or consult with your teacher for guidance on completing the table accurately.

User

KCIO4

Chat GPT

The balanced chemical equation for the reaction involving potassium perchlorate (KCIO4) is:

2 KCIO4 → 2 KCI + 3 O2(g)

The type of reaction is decomposition, as a single compound (potassium perchlorate) decomposes into multiple products (potassium chloride and oxygen gas).

User

KCIO4

Chat GPT

The compound KCIO4 represents potassium perchlorate.

User

KCIO3

Chat GPT

The compound KCIO3 represents potassium chlorate.

User

Sulfur

Chat GPT

The compound S represents sulfur.

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Answer:

E)All areas of the Earth will have twelve hours of light followed by twelve hours of dark.

Explanation:

Sana maka tulong

Answer:

E

Explanation:

guy above said so

Answer:

Long eyelashes

Explanation:

it would be long eyelashes unless somewhere in the family tree has short eyelashes.

The possible genotypes of their children would be LL (homozygous dominant) and Ll (heterozygous), and the possible phenotype would be long eyelashes

When a man with the genotype LL (homozygous dominant) for long eyelashes marries a woman with the genotype Ll (heterozygous) for long eyelashes, their children can have different genotypes and phenotypes.

The possible genotypes of their children can be:

LL (homozygous dominant): In this case, the child inherits the dominant allele from both parents and will have long eyelashes.

Ll (heterozygous): In this case, the child inherits one dominant allele from the father and one recessive allele from the mother. They will also have long eyelashes, as the dominant allele (L) determines the trait.

The possible phenotypes of their children would be:

Long eyelashes: Both the LL genotype and Ll genotype would result in the child having long eyelashes.

In summary, the possible genotypes of their children would be LL (homozygous dominant) and Ll (heterozygous), and the possible phenotype would be long eyelashes.

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Answer:

Element A and element D

Please make me brainliest!!

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Container 2 is a closed system because the mass did not change even

though the volume changed.

A closed system is the type of system which prohibits the transfer of

matter in and out the system.

In a closed system , the mass of the matter present is always the same

regardless of the changes which occurred which is why option D is the

most appropriate option.

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Answer:

the volume of a set of keys is 6.75ml

Answer:

64

Explanation:

since it's a cube all sides are equal

and to calculate volume you multiply the length by the hieght by the width

6.07 grams is the theoretical yield of calcium phosphate (Ca₃(PO₄)₂).

Mass of any substance can be calculated by using moles as:

n = W/M, where

W = required mass

M= molar mass

Given chemical reaction is:

3Ca(NO₃)₂ + 2Na₃PO₄ → 6NaNO₃ + Ca₃(PO₄)₂

From the stoichiometry it is clear that:

3 moles of Ca(NO₃)₂ = produce 1 mole of Ca₃(PO₄)₂

Given mass of Ca(NO₃)₂ = 96.1g

Mole of Ca(NO₃)₂ = 96.1g/164g/mol = 0.5859moles

So, 0.5859 moles of Ca(NO₃)₂ = produce 0.5859×1/3 = 0.0196 moles of Ca₃(PO₄)₂

Required mass of Ca₃(PO₄)₂ will be calculated by using moles as:

W = 0.0196mole × 310g/mole = 6.07 grams

Hence, 6.07 grams is the theoretical yield of calcium phosphate.

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In Chemistry, we always have to balance the equations, in many topics within the subject of Chemistry, it is required to do that, this is because we have to account for every atom in the reaction, on both sides, reactant and product, the same number of atoms that are on the reactants side must be on the products side. Therefore, the best answer for this question will be letter D

Answer:

light cannot escape new stars are formed

Explanation:

Answer:

alcohol

Explanation: