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The equilibrium constant for the new reaction at 752 K is approximately 0.29 and at 719 K is approximately 0.42.

Step wise explanation:

1) For the first reaction, the equilibrium constant (Kc) is given as 11.8 at 752 K for the reaction:

\(2NH_{3}\)(g) ⇌ \(N_{2}\)(g) + \(3H_{2}\)(g)

You are asked to calculate Kc for the following reaction:

\(1/2N_{2} + 3/2H_{2}\) ⇌ \(NH_{3}\)(g)

To find Kc for the new reaction, note that it is the reverse of the original reaction with all coefficients divided by 2. To calculate the equilibrium constant for the reverse reaction, take the reciprocal of the original Kc, and then raise it to the power of the coefficients ratio (1/2):

Kc (new) =\(\sqrt{ (1 / Kc (original))}\) = \(\sqrt{(1 / 11.8)}\) ≈ 0.29

So, the equilibrium constant for the new reaction at 752 K is approximately 0.29.

2) For the second reaction, the equilibrium constant (Kc) is given as 5.70 at 719 K for the reaction:

\(2NH_{3}\)(g) ⇌ \(N_{2}\)(g) + \(3H_{2}\)(g)

You are asked to calculate Kc for the following reaction:

\(NH_{3}\)(g) ⇌ \(1/2N_{2}\)(g) + \(3/2H_{2}\)(g)

This new reaction is the reverse of the original reaction with all coefficients divided by 2. Similar to the first case, take the reciprocal of the original Kc and then raise it to the power of the coefficients ratio (1/2):

Kc (new) = \(\sqrt{(1 / Kc (original))}\) = \(\sqrt{(1 / 5.70)}\) ≈ 0.42

So, the equilibrium constant for the new reaction at 719 K is approximately 0.42.

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Answer:

Chlorine (Cl)

Explanation:

Bromine: 2.96 electronegative

Chlorine: 3.16 electronegative

3.16 > 2.96

Hope this helps!!

Answer:

How Does a Solar Panel Generate Power? Solar panels use the photons produced by sunlight to generate direct current (DC) electricity. When the photons hit the panel they are absorbed by the panel's semiconducting silicon material.

Explanation:

Answer:

Solar panels produce electrical energy by absorbing the solar energy from the sun and converting it into electrical energy.

Explanation:

Answer:

The egg white will represent the outer layer which is the we are located on!

Explanation:

The tundra ecosystem is most vulnerable to human activity.

This ecosystem is characterized by plains which lacks trees,

very low temperature and poor nutrients. It is harsh and few

humans inhabit this region.

It is most vulnerable to humans as a result of the high oil

exploration, drilling of mineral resources and hunting that takes

place in the region.

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The oxidation number of an element in a compound changes when the compound undergoes oxidation or reduction.

In oxidation, the oxidation number of the element increases, meaning it loses electrons. This happens because the compound loses electrons to another substance. In reduction, the oxidation number of the element decreases, meaning it gains electrons. This happens because the compound gains electrons from another substance. Therefore, the change in the oxidation number of an element in a compound indicates whether the compound is being oxidized or reduced.
When a compound is oxidized, the oxidation number of one of its elements increases, meaning it loses electrons during the reaction. On the other hand, when a compound is reduced, the oxidation number of one of its elements decreases, indicating that it gains electrons during the reaction. In summary, oxidation involves an increase in the oxidation number due to electron loss, while reduction involves a decrease in the oxidation number due to electron gain. These processes often occur simultaneously in redox reactions, where one species is oxidized and another is reduced.

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The mass of a sample that absorbs 49.6 J of energy when it is heated from 49°C to 54°C and has a specific heat of 0.124 J/g°C is 80 grams.

The mass of a substance that absorbed heat energy can be calculated using the following expression;

Q = mc∆T

Where;

According to this question, a sample absorbs 49.6 J of energy when it is heated from 49°C to 54°C and has a specific heat of 0.124 J/g°C. The mass can be calculated as follows:

49.6 = m × 0.124 × {54 - 49}

49.6 = 0.62m

m = 49.6/0.62

m = 80g

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HF Lewis structure is a polar due to the difference in electronegativity between hydrogen and fluorine atoms. This is due to permanent dipole moment, meaning that there is an uneven distribution of electrons within the molecule.

The HF (hydrogen fluoride) molecule has a polar covalent bond, which means that it has an uneven distribution of electrons between the two atoms.

In a polar covalent bond, one atom has a higher electronegativity than the other and therefore attracts the shared electrons more strongly, resulting in a partial negative charge on that atom and a partial positive charge on the other atom.

In the case of HF, fluorine has a higher electronegativity than hydrogen, which means that the electrons in the covalent bond are more strongly attracted to the fluorine atom. This results in a partial negative charge on the fluorine atom and a partial positive charge on the hydrogen atom.

Because the HF molecule has a polar covalent bond and the molecule has a bent shape due to the lone pair of electrons on fluorine, the molecule as a whole is also polar.

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Answer:

This is the answer

Explanation:

Answer:

b

Explanation:

.

Answer:

gold

Explanation:

In sucrose, the anomeric carbon atoms are located in the glucose and fructose units.

The carbon atom that forms the glycosidic bond between the two monosaccharides is the anomeric carbon of the glucose unit, while the anomeric carbon of the fructose unit remains free. Thus, only the glucose anomeric carbon is selected and appears green.
Sucrose is a non-reducing sugar because it does not react with Benedict's reagent or Tollens' reagent. This is because the anomeric carbon of glucose is involved in the glycosidic bond, and therefore cannot open up to form a free aldehyde or ketone group, which is required for a sugar to be considered a reducing sugar. Non-reducing sugars like sucrose are important in biological systems because they are less susceptible to spontaneous degradation, making them better suited for long-term energy storage.
(a) The anomeric carbon atom is the one that forms the glycosidic bond in a carbohydrate molecule. In the case of sucrose, which is a disaccharide made up of glucose and fructose, there are two anomeric carbon atoms. In glucose, the anomeric carbon is C1, and in fructose, the anomeric carbon is C2. These two carbon atoms form the glycosidic bond in sucrose, which links the glucose and fructose molecules together.
(b) Sucrose is a non-reducing sugar. Reducing sugars have a free aldehyde or ketone group, allowing them to reduce other compounds or be oxidized themselves. In sucrose, both anomeric carbons are involved in the glycosidic bond, so there are no free aldehyde or ketone groups. This means sucrose cannot reduce other compounds or be oxidized, classifying it as a non-reducing sugar.

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The mass of the solid is approximately 140.54 g, by subtracting the volume of the liquid solvent from the total volume and then multiplying by the density of the solid.

To determine the mass of the solid, we need to consider the mass of the liquid solvent and the total volume of the solid and liquid together.

Let's denote the mass of the solid as \(m_solid\).

The total volume of the solid and liquid together is given as 79.0 mL.

The mass of the liquid solvent is given as 30.9 g, and its density is 0.865 g/mL.

The density of the solid is given as 3.25 g/mL.

We can calculate the volume of the liquid solvent using its mass and density:

\(V_{solvent} = \frac{m_{solvent}}{\rho_{solvent}}\)

\(V_{solvent} = \frac{30.9\text{ g}}{0.865\text{ g/mL}}\)

Volume of liquid solvent ≈ 35.77 mL

The volume of the solid can be determined by subtracting the volume of the liquid solvent from the total volume of the solid and liquid together:

Volume of solid = Total volume - Volume of liquid solvent

Volume of solid = 79.0 mL - 35.77 mL

Volume of solid ≈ 43.23 mL

Now we can calculate the mass of the solid using its density and volume:

Mass of solid = Density of solid * Volume of solid

Mass of solid = 3.25 g/mL * 43.23 mL

Mass of solid ≈ 140.54 g

Therefore, the mass of the solid is approximately 140.54 g.

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Answer:

Q1: Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

Q2: Mass is how much stuff something is made of. Volume is how much space an object takes up.

The property that the compound SeO is likely to

exhibit is option A. acts as a strong electrolyte.

Selenium oxide (SeO) is a binary compound that contains both a metal (selenium) and a non-metal (oxygen) element. In general, binary compounds consisting of a metal and a non-metal tend to exhibit ionic bonding, which results in the compound acting as a strong electrolyte in solution. This means that the compound dissociates into ions in water and conducts electricity.

Therefore, the correct answer is as given above.It could then be concluded that the property that the compound SeO is likely to exhibit is option A. acts as a strong electrolyte.

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Water is a unique substance in many ways. Here are some of the ways in which the properties of water differ from those of most other substances:High specific heat capacity ,High heat of vaporization,High surface tension,Expansion upon freezing,Universal solvent.

Water can absorb a lot of heat energy thanks to its high specific heat capacity, which prevents temperature rise. Because of this, water is a great coolant and aids in regulating the temperature of living things.

Due to its high heat of vaporisation, turning water from a liquid to a gas requires a significant amount of energy.

It has a high surface tension, which causes it to cluster and condense into droplets. The capillary action depends on this characteristic.

One of the few materials that expands when it freezes is this one. Since it enables aquatic species to float on top of the ice in extremely cold temperatures, this characteristic is crucial for their survival.

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Answer:

The formula of the precipitate formed is AgN₃ (Silver azide).

On adding aqueous ammonia to the precipitate formed, the precipitate dissolves due to the formation of a soluble complex compound with aqueous ammonia.

Explanation:

Sodium azide is NaN₃

Silver Nitrate is AgNO₃

The two of them react and theres a double displacement where the ions exchange radicals.

NaN₃(aq) + AgNO₃(aq) → NaNO₃(aq) + AgN₃(s)

The azide ion (N₃⁻), which has very similar chemical properties as the chloride ion (Cl⁻), also forms an insoluble compound with Silver.

And just like AgCl, the precipitate (AgN₃) also dissolves when ammonia is added by forming a soluble complex.

AgN₃(s) + 2NH₃(aq) → [Ag(NH₃)₂]N₃(aq)

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The new volume of the gas at the new pressure and temperature is: V_new = 0. 00182 mol

We need to know the number of moles of gas in the gas to calculate the new volume. The mass of the gas is given by the molar mass of the gas multiplied by the number of moles of gas, and the mass of the gas is equal to the volume of the gas multiplied by the density of the gas.

We can rearrange the ideal gas law to solve for the volume of the gas:

PV = nRT

We know the pressure, the new temperature, and the number of moles of gas, so we can solve for the volume of the gas:

V = P x nRT / R

We also know the mass of the gas, which can be calculated from the mass of the gas and the density of the gas:

m = V x d

d = m / V

We can substitute the values we know into one of these equations to solve for the volume of the gas:

P x nRT / R = m:

V = (P x nRT / R) / m

P = 3. 8 atm

n = (28 cm x 1 mol/mol) / 6. 022 x 10^23 mol/mol = 1. 16 mol

T = 203 K

R = 8. 314 J/(mol·K)

m = V x d = (3. 8 x 1. 16 x 8. 314) / 6. 022 = 0. 0130 mol

We can calculate the density of the gas using the density of the solvent, which is 0. 92 g/mL:

d = m / V = 0. 0130 mol / (0. 92 g/mL) = 0. 0142 g/mL

Therefore, the new volume of the gas at the new pressure and temperature is:

V_new = (3. 8 x 1. 16 x 8. 314) / 6. 022 x 0. 0142 = 0. 00182 mol

Volume is extremely small, and the amount of solute in the solvent would be very dilute. Therefore, it may not be practical to use this solution in most applications.  

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Answer: Higher and longer glide experience.

Explanation:

The pH scale is a way to measure the acidity or basicity of a solution. pH is defined as the negative logarithm (base 10) of the hydrogen ion concentration, [H+], in moles per liter.

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The ratio of octene to oxygen is 1:12.

To determine the ratio of octene (C8H16) to oxygen (O2) in the given reaction, we need to examine the balanced chemical equation. However, the equation you provided does not seem to be balanced. The coefficients for each compound must be determined to achieve a balanced equation before we can calculate the desired ratio.

Assuming you meant the combustion reaction of octene, a balanced equation would be:

C8H16 + 12O2 → 8CO2 + 8H2O

From the balanced equation, we can see that for every 1 mole of octene (C8H16), we require 12 moles of oxygen (O2) to completely react.

This means that for every 1 mole of octene, we need 12 moles of oxygen to fully combust the octene and produce the corresponding amounts of carbon dioxide (CO2) and water (H2O) as shown in the balanced equation.

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Answer:

Heat will flow from the hotter object to the colder. The molecules in the hotter object will slow down and the molecules in the colder object will speed up. Eventually they will get to the point where they have the same temperature. This happens all the time around you.

Explanation:

Answer: Heat will flow from the hotter object to the colder. The molecules in the hotter object will slow down and the molecules in the colder object will speed up. Eventually they will get to the point where they have the same temperature. This happens all the time around you.

HOPE THIS HELPS

Answer:

d

Explanation:

Of the given options, Lithium (Li) would most readily react with water.  

• The substances that spontaneously go through a chemical reaction with water, as they are highly reducing in nature are known as water reactive substances.  

• The alkali metals and the alkaline earth metals are the metals that reacts the most with water.  

• In the periodic table, the alkali metals, that is, lithium, sodium, potassium, rubidium, caesium, and francium are the most reactive metals.  

• They all react explosively and vigorously with cold water leading to the displacement of hydrogen.  

• The alkaline earth metals are the second most reactive metals in the periodic table apart from Be, which does not react with water.  

Thus, Li is the alkali metal that reacts readily with water.

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Answer:

Mass percent of Na

Explanation:

To conclusively prove that a substance is NaCl, we must look at its percentage composition.

There is a standard and known percentage by mass composition of NaCl which has been documented in literature. Every other sample of NaCl is analyzed in comparison to these values of which the purity of the NaCl is a major determinant.

Hence, by considering the percentage by mass of the constituent elements, the purity of a sample of any compound can be conclusively established.

Answer:

whoa this question is long

Explanation:

how did u write it gosh

Explanation:

(a):their malleability:

>iron making. iron worker heat the meat and hammer it to give them the desired shape.

> in the jewelry making process, like the gold or silver you wear are results due to the malleability of metal

(b):their ductility:

>for the making of high tension cable that connects different cities for transferring of electricity.

>for making wire gauze

(c):their ability to conduct electricity:

>for lighting up your house with light bulbs

>for using cooking stoves

>to make refrigerator work.

Answer:

a)gold and silver-used to make jewellery

b)gold and copper(we draw them in wires easily because they are not brittle)

c)copper and iron(this is because both of them are metal and metaps are best conductors of electricity)

Explanation:

uses of copper- to make utensils

to make wires for circuits

uses of silver-to make jewellery

to make mirrors

malleability is the property of a meta in which the metal can be changed into different shapes.

Ductility-can be drawn into thin wires.

Isotopes are the elements which have same atomic number but different mass numbers.

Same atomic number tells that the number of protons present in those elements are same but different mass number tells that the number of nucleons is not the same.

These elements share same position in the periodic table and are stable. With the stability of isotopes it means they do not emit radiations.

The unstable isotopes are those isotopes which emit radiations and this might happen due to the atomic defect that shifts the position of particle, creating F-center which emits radiations.

These isotopes undergo radioactive decay. These decays can be alpha-decay, beta(+) decay or beta(-) decay.

Therefore, unstable isotopes means the isotopes of elements which emit radiations.

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