Determine the value of the equilibrium constant KP for the overall reaction if we know that the equilibrium pressure of C2H4(g) is 0. 10 atm, the equilibrium pressure of HBr(g) is 4. 80 atm, and there are 1. 7 g of C2H5Br(l) left in the container when the reaction reaches equilibrium (enter your answer with two decimal points)

Answer:

A

Explanation:

its A because of how oxygen can come out of plants during the time of photosynthesis

Answer:

If the molecules are heated further, the liquid water will become water vapor, which is a gas. Gas particles have more energy and are on average at distances from each other which are much larger than the size of the atoms/molecules themselves.

As both the ions have charge of +2 the compound formed is PbMg as the like charges will cancel out each other.

An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.

Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.Ions of opposite charges combine in ionic compounds.

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Answer:

B

Explanation:

B

The heat of combustion of the acetylene is;  -1253.3 kJ/mol

The heat of combustion of acetylene (C2H2) is the amount of heat energy released when acetylene is burned in excess oxygen. The heat of combustion is a measure of the energy content of a substance and is usually expressed in units of energy per unit of substance, such as joules per mole (J/mol) or calories per gram (cal/g).

The heat of combustion is;

[2(-393.5) + (-241.6)] - [-226.7]

= -1253.3 kJ/mol

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Answer:

C

Explanation:

hydrogen Bond exists between ammonia, hydrogen flouride and water so the answer is C

Two objects are placed a certain distance from each other. The amount of gravitational force between the two objects depends on their masses and the distance between them. As the masses of the objects decrease, the force of gravity between them increases. As the distance between the objects decreases, the force of gravity between them decreases.

Gravitational force is defined as the force of attraction that a body of mass M, exerts on another body that is found within its region of space that this force acts.

The law of gravitational attraction states that the gravitational force of attraction between two bodies of masses m₁ and m₂ is directly proportional to the product of their asses and inversely proportional to the square of the distance between them, r.

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The chemical substance whose 0.1 M solution has a pH of 9 is a weak base.

What is a weak base?

A weak base is a substance that, when dissolved in water, does not completely dissociate to produce hydroxide (OH-) ions.

The pH of a weak base solution is higher than 7.0 but less than or equal to 10.0.

Examples of weak bases include ammonia and ammonium hydroxide.

The term "weak base" refers to a base that, when dissolved in water, does not completely dissociate into its component parts.

As a result, the resulting aqueous solution contains only a small proportion of hydroxide ions and the concerned basic radical, while also containing a large proportion of undissociated molecules of the base.

This type of base is considered to be relatively unstable.

The pKa value of weak bases ranges from 4 to 8.

As a result, the higher the pKa value of a weak base, the less acidic it is.

The pH of the solution and the pKa value of a weak base are inversely proportional.

As a result, when the pH is greater than the pKa, more of the weak base is present in the ionized form.

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When a and b are mixed on the surface of an object, a chemical reaction takes place called a Combination reaction.

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Answer:

matter is anything that occupies space and mass

Answer: In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Explanation: Hope this help :D

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer:

6.02×10 to be tge power 23

Explanation:

protons.

An acid can also be thought of as a chemical that can neutralize a base. Similarly, a base can neutralize an acid.

Acids turn litmus paper red, while bases make litmus paper turn blue.

Some examples of acids are sulfuric acid, hydrochloric acid, nitric acid, and so on. Some examples of bases are sodium hydroxide, potassium hydroxide, and so on.

Acids generally taste sour, while bases have a bitter taste.

Alkalis are the bases that are water-soluble, which means that they dissolve in water. In other words, not all bases are water-soluble, and only the water-soluble bases are known as alkalis. An example of an alkali is sodium hydroxide. It is a base because it can neutralize an acid, and because it is water-soluble, it is an alkali. An example of a base that is not alkali is copper oxide. This chemical can neutralize an acid, but it is insoluble in water.

In other words, all alkali are bases but not all bases are alkalis.

Also, an alkali has a hydroxide group, while a base has an oxide group in it.

May solution ba o wala tanong kolang

The percent yield of a reaction is 80%

The theoretical yield of the product is 50.0 g

The actual yield of the product is 40 g

We need to calculate the percent yield of the reaction.

What is the percent yield?

The percent yield describes the ratio of the actual yield and the theoretical yield expressed as a percentage value.

The formula of percent yield is shown as

\(Percent\ yield =\ \frac{actual\ yield} {theoretical\ yield} \times 100\)

Now, putting the given values as

\(Percent\ yield =\ \frac{40} {50} \times 100\)

Percent yield = 80 %

Therefore, the percent yield of a reaction is 80%

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The Arctic Ocean has experienced significant sea ice loss over the past 40 years due to rising global temperatures caused by human-induced climate change.

This pattern is probably going to go on as normal temperatures in the Cold keep on rising quicker than elsewhere in the world. This deficiency of ocean ice has extensive ramifications for worldwide atmospheric conditions.

As well with respect to the creatures that rely upon the ice, like polar bears, walruses, and other Icy untamed life. It additionally has monetary and international ramifications.

As the contracting ice cap is making it more straightforward to get to beforehand undiscovered oil and gaseous petrol stores, and likewise opening up new transportation paths could abbreviate the movement time among Asia and Europe.

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The pH of the carbonate buffer solution is 6.76.

To determine the pH of a buffer solution, we need to know the pKa value of the weak acid and the molar concentrations of the acid and its conjugate base.

In this case, the carbonate buffer system has two weak acids: carbonic acid and bicarbonate, which are in equilibrium with their conjugate bases, carbonate and hydrogen carbonate. The pKa values of carbonic acid and bicarbonate are 6.35 and 10.33, respectively.

To calculate the pH of the buffer solution, we need to use the Henderson-Hasselbalch equation:

pH = pKa + log([base]/[acid])

where [base] is the molar concentration of the conjugate base and [acid] is the molar concentration of the weak acid.

First, we need to calculate the molar concentrations of the weak acid and its conjugate base.

The molar concentration of the carbonate ion can be calculated by dividing the number of moles by the volume of the solution:

\([CO_{3}^{2-}] = 1.5 \text{ mol}/1 \text{ L} = 1.5 \text{ M}\)

The molar concentration of the bicarbonate ion can also be calculated by dividing the number of moles by the volume of the solution:

\([HCO_{3}^{-}] = 1 \text{ mol}/1 \text{ L} = 1 \text{ M}\)

Next, we can use the Henderson-Hasselbalch equation to calculate the pH of the buffer solution:

pH = pKa + log([base]/[acid])

= 6.35 + log(1.5/1)

= 6.76

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Sodium from Na3PO4(aq) could be prepared by electrolysis of the aqueous solution shown. Based on the provided options, the element that could be prepared by electrolysis of the aqueous solution shown

Potassium from KCl(aq)
Here's why:
- Sodium from Na3PO4(aq) and Nitrogen from AgNO3(aq) are not possible because these ions are more stable in solution than undergoing electrolysis.
- Sulfur from K2S04(ed) is not valid as the compound should be K2SO4(aq) and even then, it would produce oxygen at the anode instead of sulfur.
- Oxygen from H2SO4(aq) can be prepared through electrolysis, but this is not an element directly obtained from the compound.
Potassium from KCl(aq) can be prepared by electrolysis. During this process, K+ ions are reduced to potassium metal at the cathode, and Cl- ions are oxidized to chlorine gas at the anode.

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Answer:

1.3155M

Explanation:

molar mass of CuSO4

=63.55+32.07+16(4)

=159.62g/mol

n=mass/molar mass

n=42.00/159.62

n=0.2631mol

volume=200mL=0.2L

molarity=mole (n)/volume (v)

molarity=0.2631mol/0.2L

molarity=1.3155M

The new pressure exerted by helium on its container is 2533.33 torr.

Boyle's law: For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. so PV= constant.

At constant temperature and moles,

P1V1 = P2V2.

The original sample is at 2atm torr and volume 5.00 L and then helium gas was compressed to 3.00 L

∴ P₁V₁ = P₂V₂

 (2× 760 torr)(5.00 L ) = (3.00 L )(x torr),

 x = 2533.33 torr.

 P₂ = 2533.33 torr.

Therefore, the new pressure exerted by helium on its container is 2533.33 torr.

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Answer:

Choux pastry

Explanation:

Eclairs are a long, thin pastry made from choux pastry and is filled with cream and topped with icing (usually chocolate).

I hope this helps!!

- Kay :)

Long French pastries composed of choux pastry, filled with custard or pastry cream, and covered with fondant icing are known as éclairs.

The fundamental components for choux dough, including as sugar, butter, flour, milk, and egg, are used to make eclairs, cream puffs, and profiteroles. However, it is crucial to read and follow the directions carefully to prevent common eclair blunders such . Eclair shells with broken surfaces.

A choux pastry-based éclair is a long, thin individual cake. This delicious treat is loaded with cream and covered with milk chocolate. A donut is a fried sweet treat made of sweet dough that is often shaped like a ring or ball.

The chocolate éclair, which is covered with chocolate fondant and filled with chocolate custard or pastry cream, is possibly the most well-known type of éclair.

Thus, éclair is made up of choux pastry.

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In many cases, the Coase theorem does not work well because c. transaction costs are too high. The Coase theorem suggests that in the absence of transaction costs, parties can negotiate and reach an efficient outcome regardless of the initial allocation of property rights.

However, in reality, transaction costs such as bargaining costs, information costs, and enforcement costs can significantly hinder the ability of parties to negotiate and reach mutually beneficial agreements.

When transaction costs are high, it becomes difficult for parties to gather and exchange information, engage in effective negotiations, and enforce agreements. These costs can include the time and resources required for communication, legal representation, monitoring, and enforcement. High transaction costs can discourage parties from engaging in negotiations or make it economically infeasible to reach an efficient outcome.

Therefore, despite the theoretical possibility of the Coase theorem, transaction costs often present practical barriers to efficient bargaining and prevent the theorem from working effectively in real-world situations.

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Answer: The pressure of nitrogen will be 2.0 atm

Explanation:

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = 1.0 atm

V = Volume of gas = 10.0 L

n = number of moles = ?

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(297K\)

\(n=\frac{PV}{RT}\)

\(n=\frac{1.0atm\times 10.0L}{0.0820 L atm/K mol\times 297K}=0.41moles\)

Now again using ideal gas equation :

\(P=\frac{nRT}{V}=\frac{0.41mol\times 0.0821Latm/Kmol\times 297K}{5.0L}=2.0atm\)

Thus pressure of nitrogen will be 2.0 atm

The reason why 4-aminophenol is acetylated at the amine group rather than the phenol group is due to the difference in reactivity and nucleophilicity between the amine and phenol functional groups.

The amine group (–NH2) is more reactive and nucleophilic compared to the phenol group (–OH). This is because the lone pair of electrons on the nitrogen atom in the amine group is more available for nucleophilic attack.

When an acetylating agent, such as acetic anhydride (CH3CO)2O or acetyl chloride (CH3COCl), is used to acetylate 4-aminophenol, the amine group acts as a stronger nucleophile and readily reacts with the electrophilic acetylating agent. This results in the substitution of the hydrogen atom on the amine group with an acetyl group (–COCH3), leading to the formation of N-acetyl-4-aminophenol.

On the other hand, the phenol group in 4-aminophenol is less reactive and nucleophilic. The lone pair of electrons on the oxygen atom in the phenol group is less available for nucleophilic attack. Therefore, under the same conditions, the amine group is more likely to undergo acetylation instead of the phenol group.

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Which of the following explains why 4-aminophenol is acetylated at the amine group rather than the phenol group? the nitrogen is less electronegative than the oxygen the nitrogen is more electronegative than the oxygen the nitrogen is less sterically hindered than the oxygen the nitrogen is smaller than the oxygen Question 2 1 pts Starting with 3.00 g of 4-aminophenol (109.13 g/mol) and excess acetic anhydride (102.09 g/mol), what is the theoretical yield (in g) of acetaminophen ( 151.16 g/mol)?

Explanation:

The Gas Law Apparatus is a high-quality demonstrator of the relationship between pressure, volume and temperature of a gas. The pressure gauge shows how pressure affects volume and vice versa. A digital thermometer displays the temperature.

The correct option for the process used to refine aluminum from its bauxite ore is option D.

D. Smelting

The reason why smelting is the correct choice is as follows;

Bauxite is the aluminum ore from which alumina, also known as aluminum

oxide, Al₂O₃, is produced. Bauxite is extracted from the topsoil regions of

some subtropical and tropical regions, and the Bayer process is primarily

then used to produce alumina from the bauxite.

Aluminum is produced from the alumina by an aluminum smelting process

known as the Hall—Heroult electrolytic process which involves the use of a

carbon anode and direct current to produce aluminum by reducing the

aluminum oxide

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Answer:

The molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide is 0.25M.HOW TO CALCULATE MOLARITY:The molarity of a solution can be calculated by dividing the number of moles by its volume. That is;Molarity = no. of moles ÷ volumeAccording to this question, 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide. The molarity is calculated as follows:Molarity = 0.50mol ÷ 2LMolarity = 0.25MTherefore, the molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide is 0.25M.Learn more about molarity at: brainly.com/question/2817451

Explanation:

Mark me brainliest please!!! I spent a lot of time on this!!

Answer:

oh it's easy

Explanation:

Take the hydrate

N

a

2

S

2

O

3

∙

5

H

2

O

. Are there ionic forces between the

N

a

+

and the

S

2

O

2

−

3

and ion-dipole forces between the cation/anions and the water?