Which response contains all the salts whose aqueous solutions are acidic, and no other salts?
I. NH4NO3
II. NaCN
III. KCl
IV. NH4Br
V. LiCl
VI. CaCl2
VII. CH3NH3Cl
VIII. KNO2
IX. NH4CH3COO
a. II, III, V, VI, and VIII
b. I, IV, and VII
c. II, VIII, and IX
d. I, IV, VII, and IX
e. II and VIII

The correct order of the steps is: carbonyl oxygen is protonated, alcohol adds to the carbonyl to form a tetrahedral intermediate, hydroxy oxygen is protonated, and alcohol displaces the hydroxy group in an SN2 reaction.

The first step in the mechanism to convert a carboxylic acid to an ester is the protonation of the carbonyl oxygen. This protonation makes the carbonyl carbon more electrophilic, allowing it to react with the alcohol in the next step. The alcohol then adds to the carbonyl to form a tetrahedral intermediate. The hydroxy oxygen is then protonated, which facilitates the leaving of the hydroxy group and the formation of the ester in an SN2 reaction.

Tetrahydrofuran (THF) and hydrogen sulphide (HSCH3) react in the specified reaction using an SN2 mechanism. SN is a particular kind of nucleophilic substitution reaction in which the nucleophile contacts the substrate directly, which causes the leaving group to be displaced in a bimolecular manner. As the nucleophile in the described reaction, hydrogen sulphide attacks the THF's carbon center. Through a coordinated process, this assault causes the leaving group—an alkyl group linked to the THF—to be displaced.

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Answer: number 1

Explanation:

Answer:

b for sure

Explanation:

Answer:

c good luck with the answer

Answer:

Platelets

Explanation:

Those are there to heal any wounds to keep the blood from leaking through. So if you ever stop bleeding, thats why

Answer:

The acid dissociation constant (K_a) of an acid is defined as the equilibrium constant for the dissociation of the acid in water. The equation for the dissociation of an acid HA in water can be written as follows:

HA(aq) + H2O(l) ⇌ H3O+(aq) + A-(aq)

The equilibrium constant expression for this reaction is:

K_a = [H3O+][A-] / [HA]

For the given reaction, the acid is HF, and its conjugate base is F-. Therefore, the acid dissociation constant (K_a) for HF can be expressed as:

K_a = [H3O+][F-] / [HF]

The justification provides the "why" and "how" the evidence substantiates the assertion.

Justification is defined as the act, procedure, or declaration that makes sinners righteous in God's eyes. The term "research justification" refers to the justification for conducting the research, which includes a description of the research's design and methodology.

Your students may offer the following justification: Matter is air (claim). When we added more air to the ball, we discovered that the weight of the ball rose (evidence). This demonstrates that weight, a property of matter, exists in air (reasoning).

Thus, the justification provides the "why" and "how" the evidence substantiates the assertion.

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Answer:

Sewage pollutes our waters with pathogens, excess nutrients, heavy metals, and other toxins. It kills aquatic life and creates algal blooms that can suffocate fisheries. Sewage carries pathogens that can end up in our drinking water supplies and swimming areas.

Missing:

Explanation:

The 90% confidence interval for the difference in the incidence of hail between spraying and not spraying the clouds is (-0.141, 0.241).

The experiment aimed to determine if spraying chemicals on clouds for artificial rainfall could reduce hail occurrence. The data collected included the number of days when chemicals were sprayed on the clouds and the number of days when no intervention was done.

Out of the observed cloudy days with hail, 7 days had spraying while 43 days had no spraying. On the other hand, out of the observed cloudy days without hail, 43 days had spraying and 122 days had no spraying.

To calculate the 90% confidence interval for the difference in hail incidence, we use a formula that takes into account the sample sizes and proportions. After performing the calculations, the resulting confidence interval is (-0.141, 0.241). This means that there is not enough evidence to conclude a significant difference in hail occurrence between spraying and not spraying the clouds, as the confidence interval contains zero.

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Answer:

81.6%

Explanation:

mass of acetylferrocene and ferrocene mixture = 22.092 g

mass ratio acetylferrocene and ferrocene mixture = 1 : 1

The sum of the ratios = 2, therefore the mass of each compound will be half the mass of the mixture

mass of each compound in the sample mixture = 1/2 * 22.09 2= 11.046 g

mass of recovered acetylferrocene = 9.017 g

percentage recovery = mass recovered/mass in sample * 100%

percentage recovery of acetylferrocene = (9.017 g / 11.046 g) * 100%

percentage recovery of acetylferrocene = 81.6%

Answer:

Woah don't cash app whats the question

The type of reaction that occurs between  calcium hydroxide and nitric acid is a neutralization reaction.

The term neutralization reaction refers to a reaction that occurs between an acid and a base that leas to the formation of salt and water only. The type of reaction that occurs between  calcium hydroxide and nitric acid is a neutralization reaction.

The reason why zinc will react with lead nitrate and not calcium chloride is because lead is less than zinc in the electrochemical series hence it can be displaced from solution.

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Answer:

Explanation:

Al(ClO2)3

(a) qsys: impossible to determine

(b) ΔEsys: 0

(c) ΔEuniv: inconclusive

What is the determination of the changes in qsys, ΔEsys, and ΔEuniv during the phase change?

In the given information, the circles represent a phase change occurring at constant temperature. However, the information provided does not allow us to determine the value of qsys, which represents the heat transfer to or from the system. Without additional data, we cannot ascertain whether heat is being added or removed from the system.

Regarding ΔEsys, which represents the change in internal energy of the system, it is determined to be zero. This indicates that there is no change in the system's internal energy during the phase change occurring at constant temperature.

Lastly, the value of ΔEuniv, which represents the change in the total energy of the system and its surroundings, is inconclusive based on the given information. Without further details, it is not possible to determine whether the phase change results in a change in the total energy of the system and its surroundings.

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Answer:

Explanation:

7.706 g of CO₂ will contain 12 x 7.706 / 44 g of C

= 2.1 g of C .

This will be contained in 3.256 g of isopentyl acetate

3.156 g of H₂O will contain 2 x 3.156 / 18 g of H

= .351 g of H

This will be contained in 3.256 g of isopentyl acetate

Rest will be oxygen

amount of oxygen in 3.256 g of isopentyl acetate

= 3.256 - ( 2.1 + .351 )

= .805 g

ratio of C , H , O in isopentyl acetate

= 2.1 g : .351 g : .805 g

2.1 / 12 : .351 / 1 : 0.805 / 16 ratio of moles

= .175 : .351 : .05  ratio of moles

= 3.5 : 7.02: 1

= 7 : 14 : 2

empirical formula of  isopentyl acetate

= C₇ H₁₄ O₂ .

The answer is that prolyl hydroxylase is more likely to have a cobalt center.

This is because prolyl hydroxylase is a member of the dioxygenase family of enzymes that require metal ions as cofactors. Cobalt is a commonly used metal ion for this family of enzymes, and it has been shown to enhance the activity of prolyl hydroxylase.

On the other hand, magnesium is not commonly used as a cofactor for dioxygenases. In 100 words, prolyl hydroxylase is more likely to have a cobalt center as it is a member of the dioxygenase family of enzymes, which require metal ions as cofactors.

Cobalt is a commonly used metal ion for this family of enzymes, including prolyl hydroxylase. The use of cobalt has been shown to enhance the activity of prolyl hydroxylase, whereas magnesium is not commonly used as a cofactor for dioxygenases. In conclusion, based on the available evidence, it is more likely that prolyl hydroxylase would have a cobalt center.

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The potential energy (u) of a pair of hydrogen atoms separated by a large distance x is given by the equation = u(x) = -c6/x^6. The equation provided represents a simplified model of the interaction between hydrogen atoms, known as the Lennard-Jones potential.

In this equation, c6 is a positive constant that determines the strength of the interaction between the hydrogen atoms. The potential energy is inversely proportional to the sixth power of the distance between the atoms.

As the distance (x) between the hydrogen atoms increases, the potential energy decreases rapidly. This is because the negative sign indicates an attractive force between the atoms. The potential energy approaches zero as the distance between the atoms becomes very large.

Conversely, as the distance between the hydrogen atoms decreases, the potential energy becomes more negative, indicating a stronger attractive force between the atoms.

In reality, the interaction between atoms is more complex and involves other factors such as electron-electron repulsion and electron-nucleus attraction.

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Answer:

Periodic tables can use color to identify other element characteristics. For example, an electronegativity periodic table color codes the elements based on how electronegative they are. The valence periodic table uses color to identify the most common valence state for each element.Oct 2, 2019

pls like and rate us .

The color given to a the elements in periodic table is to characteristics of the elements mainly to identify whether they are solid, gas or liquid. Thus option D is correct.

A periodic table contains all the discovered elements which are classified into different groups and periods. Groups are vertical columns of elements with similar properties and same number of valence electrons.

Periods are horizontal rows from left to right with an increase in atomic number. There are 18 groups and 7 periods in periodic table. Each group has given each color and some elements showing exceptional characteristics such as hydrogen and helium have separate colors.

All the first group elements called alkali metals have one color and the second groups elements with another color, All the d-block elements are given the same colour and metals in p-block elements have the same color.

Similarly, all the metalloids have one color and all other gases have the same colour in which inert gas group and halogen group have seperate colours.

Hence, the color in periodic table helps to identify the element's nature like its state also. Thus option D is correct.

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Answer: The pressure in atmospheres is 0.674 in the container if the temperature remains constant.

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

\(P\propto \frac{1}{V}\)     (At constant temperature and number of moles)

\(P_1V_1=P_2V_2\)  

where,

\(P_1\) = initial pressure of gas  = 205 kPa

\(P_2\) = final pressure of gas = ?

\(V_1\) = initial volume of gas  = 4.0 L

\(V_2\) = final volume of gas = 12000 ml = 12 L    (1L=1000ml)  

\(205\times 4.0=P_2\times 12\)  

\(P_2=68.3kPa=0.674atm\)        (1kPa=0.0098atm)

Therefore, the pressure in atmospheres is 0.674 in the container if the temperature remains constant.

Answer:

P2=68.33 mm Hg

Explanation:

P1V1=P2V2

PLUG IN

CONVERT mL TO L (12000mL=12L)

(205)(4)=(P2)(12)

DIVIDE BOTH SIDES BY 12

P2= 68.33 kPa

Acetic acid would be considered a weak electrolyte, as it only partially ionizes in water and produces small amounts of ions.

When pure water is connected to electrodes and a light bulb, it does not conduct electricity and the light bulb does not illuminate. This is because pure water is a poor conductor of electricity due to its low ion concentration.

However, when a few milliliters of acetic acid is added to the beaker, the light bulb glows dimly. This is because acetic acid is a weak electrolyte and it undergoes partial ionization in water, producing small amounts of ions that can conduct electricity and allow the light bulb to illuminate.

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Not every earthquake has a(n) Foreshock, but every earthquake has an Aftershock that occurs in the Same place as the mainshock.

An earthquake is defined as a natural disaster in which there are tectonic plates that are present on the earth's crust collides with each other.

An Earthquake can be minor as well as natural depending upon the frequency it causes the damage. Earthquake is the Shaking of Earth and was much destruction of the economy and manpower.

Surroundings are being disturbed like trees will fall, and buildings will collapse which will cause damage to the economy as well as to human life.

Foreshock is the before shop which happens before the earthquake and aftershock is the other socks that happen after the earthquake

Thus, the correct options are 1. Foreshock, 2. Aftershock, 3. The Same place as.

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Answer:

a pure compound because mixtures are formed from two or more compounds.

Answer:

In this section, we consider how several of the enumerated powers of Congress under the original Constitution have been interpreted. The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States.

Answer:

Atoms, and chemical make up

Explanation:

Our bodies and any other terrestrial body are formed with atoms, those same atoms from a chemical make-up that creates items, such as water with 2 hydrogen atoms and 1 oxygen atom is formed. In essence, we all are about atoms and chemical makeup is the instruction on how to build us

The number of molecules or the number of atoms that the oxygen has has is 9.6 * 10^22 molecules/ atoms.

We have to note that the number of the molecules of the oxygen that we have can be obtained by the use of the hypothesis that have been put forward by Avogadro.

We know that;

22.4 L of oxygen is contained in one mole of oxygen

3.5 L of oxygen would contain 3.5 * 1/22.4

= 0.16 moles of oxygen

If 1 mole of oxygen contains 6.02 * 10^23 molecules /atoms

0.16 moles of oxygen would contain 0.16 *  6.02 * 10^23/1

=9.6 * 10^22 molecules/ atoms

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Missing parts;

How many molecules of O2 are in a 3.5-liter container? How many atoms?

double-replacement reaction has the generic formula AB + CD AD + CB, where A and C are positively charged cations while B and D are negatively charged anions. one of the results of a twofold replacement reaction is a precipitate, a gas, or a molecular molecule.

A double displacement reaction is one in which portion of one reactant is replaced by part of another. The double displacement reaction is written as AB + CD AD + CB. Example: AgNO3+NaClAgNO3+NaClAgNO3+NaNO3.

Double replacement reactions, also known as double displacement, exchange, or metathesis reactions, occur when components of two ionic compounds exchange, resulting in the formation of two new compounds.

When components of two ionic compounds are transferred, two new compounds are formed (also known as double displacement, exchange, or metathesis processes).

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Answer:

1

Explanation:

Octet meaning 8. So if chlorine already has 7 valence electrons it will only need to get 1 more to be satisfied.

Answer:

The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

Explanation:

Answer:

The brain and the spinal cord(and sensory organs)

Explanation:

(No explanation needed)

Hope this helps :)

Answer:

They can crack or shatter if they are dropped.

Answer:

Evaporation

Explanation:

Students are to mix the solvent to dilute completely,and get and evaporation dish,candle(heat),tripod stand...pour the solution in the evaporation dish and place it on tripod stand above the candle wait for some time the water will change into gas and to get the water they have to cover the evaporating and direct it to a different container to get the water and salt

Answer:

B.

Explanation: Because it's at the bottom of the layer so it gets least sun and solar energy.