for a specific reaction, which of the following statements can be made about the equilibrium constant? a. it changes with changes in the temperature. b. it always remains the same. c. it can be changed by the addition of a catalyst. d. it increases when the concentration of one of the reactants is increased. e. it increases when the concentration of one of the products is increased.

Answer:

Enthalpy of solution is always Positive.

Answer:

0.05mole

Explanation:

Given parameters:

Mass of Carbon dioxide formed  = 2.241g

Molar mass of Carbon dioxide  = 44g/mol

Unknown:

Number of moles of carbon dioxide  = ?

Solution:

To solve this problem, we use the expression below:

 Number of moles  = \(\frac{mass}{molar mass}\)  

  Now, insert the parameters and solve;

 Number of moles = \(\frac{2.241}{44}\)   = 0.05mole

Answer:

Surface area

Explanation:

The rate of a chemical reaction is increased when the surface area of a solid reactant is increased. This can be done by cutting the substance into small pieces, or by grinding it into a powder. If the surface area of a reactant is increased, it implies more particles are exposed to the other reactant.

When a seltzer tablet is ground into powder, the idea is to expose more of its surface to the other reactant. Since rate reaction depends on effective collision between reactants, more exposed particles implies a greater degree of collision between reactants and a faster rate of reaction.

Answer:

the answer is the second option got it right so do worry

Explanation:

hope this helps

The chemical equation for the gaseous homogeneous equilibrium expression [SOâ]² [Oâ] / [SOâ]² is: 2SOâ(g) + Oâ(g) ⇌ 2SOâ(g)

The equilibrium constant for this reaction can be expressed as: Kc = [SO₃]² / [SO₂]²[O₂] where [ ] represents the concentration of the respective species.

This equation represents the equilibrium between sulfur dioxide (SOâ) and oxygen gas (Oâ) to form sulfur trioxide (SOâ) in a closed system.

The equilibrium expression shows the ratio of the concentrations of products to reactants, with the concentration of sulfur trioxide squared in the numerator and the concentration of sulfur dioxide squared in the denominator.

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Answer: The time after which the concentration of \(SO_2Cl_2\) fall to 12.5% of its initial value is 26.2 hours

Explanation:

Expression for rate law for first order kinetics is given by:

\(t=\frac{2.303}{k}\log\frac{a}{a-x}\)

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  = 100

a - x = amount left after decay process  = 12.5

a) for completion of half life:  

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

\(t_{\frac{1}{2}}=\frac{0.693}{k}\)

\(k=\frac{0.693}{8.75hour}=0.0792hour^{-1}\)

b) for concentration to fall to 12.5 % of initial value  

\(t=\frac{2.303}{0.0792}\log\frac{100}{12.5}\)

\(t=26.2hours\)

The time after which the concentration of \(SO_2Cl_2\) fall to 12.5% of its initial value is 26.2 hours

Answer:

Another method tested in study to produce sodium polyacrylate as an alternative to current methods began with Butyl acrylate acrylic acid copolymer and poly(butyl acrylate)

Explanation:

They were synthesized via suspension polymerization by using butyl acrylate as the main monomer and acrylic acid as the secondary monomer

I suggest you get more info from wikipedia cause it helped me alot

The monomers used to make sodium polyacrylate polymer chains acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) .

Monomers are small organic molecules that have the capability to bond to form larger molecules known as polymers.

The reaction between acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) produces sodium polyacrylate.

A long-chain copolymer made up of alternate units of acrylic acid and sodium acrylate is the result of this process.

Acrylic acid and sodium acrylate form a copolymer, which is a polymer made up of two distinct monomers.

The monomers used to make sodium polyacrylate polymer chains acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) .

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Answer:

D

Explanation:

Answer:

C - Up and Down in a Circle

Explanation:

Waves are actually energy passing through the water, causing it to move in a circular motion. When a wave encounters a surface object, the object appears to lurch forward and upward with the wave, but then falls down and back in an orbital rotation as the wave continues by, ending up in the same position as before the wave came by.

Answer:

Because metal can not decompose!

The five isomeric C6H14 alkanes can be represented by their condensed formulas and bond-line formulas. The condensed formulas are C6H14, C6H14, C6H14, C6H14, and C6H14 for n-hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane, respectively. The bond-line formulas visually represent the carbon atoms and their connections using lines, with hydrogen atoms omitted. The isomers differ in the arrangement of carbon atoms and the presence and position of methyl (CH3) groups, leading to unique structures and physical properties.

The five isomers of C6H14 alkanes are n-hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane. The condensed formulas for these isomers are C6H14, C6H14, C6H14, C6H14, and C6H14, respectively. In the condensed formulas, the number of carbon (C) atoms is indicated by the subscript 6, and the number of hydrogen (H) atoms is indicated by the subscript 14.

The bond-line formulas provide a visual representation of the carbon atoms and their connections in the molecule. In the bond-line formulas, carbon atoms are represented by vertices, and the bonds between them are represented by lines. Hydrogen atoms are omitted for simplicity. The isomers can be distinguished by the arrangement of carbon atoms and the presence and position of methyl (CH3) groups.

n-Hexane is a straight-chain alkane with six carbon atoms in a row. 2-Methylpentane has a branch consisting of a methyl group (CH3) attached to the second carbon atom of the pentane chain. 3-Methylpentane has a methyl group attached to the third carbon atom of the pentane chain. 2,2-Dimethylbutane has two methyl groups attached to the second carbon atom of the butane chain. Finally, 2,3-Dimethylbutane has one methyl group attached to the second carbon atom and another methyl group attached to the third carbon atom of the butane chain.

These isomers exhibit different physical properties due to their distinct structures. The arrangement of carbon atoms and the branching of methyl groups influence factors such as boiling points, melting points, and solubility. Understanding the structural isomerism of alkanes is important in organic chemistry as it impacts their reactivity and behavior in various chemical reactions.

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Answer:

its not d its b i took the quiz

Explanation:

The effect on the amount of gas produced is that if the experiment is repeated using 0.35 grams of potassium is that less amount of hydrogen gas is liberated.

When  potassium reacts with water it liberates hydrogen gas and potassium hydroxide is formed.

\(2K+3H_2O\rightarrow2H_2+2KOH\)

When lithium reacts with water it liberates hydrogen gas and lithium hydroxide is formed.

\(2Li+3H_2O\rightarrow2H_2+2LiOH\)

Moles in case of each reaction can be calculated by the formula ,

                     n=W/M

where W =mass and M=molar mass

therefore, moles of potassium  are ,0.35 g/39=0.0089

and moles of lithium are,0.35 g/6.9=0.0507

Since the amount of moles produced when lithium metal is used is more as compared to potassium ,lithium will produce more gas.Thus,on replacing lithium with potassium less gas will be produced.

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the value of qreaction (in J) for the given process is -321.54 J.

For the given problem, the mass of the solution, ms, can be determined as:

ms = 5.101 g + 48.709 g= 53.810 g

The specific heat of the solution, s, is considered to be equal to 4.18 J/g °C (specific heat of water).The change in temperature of the solution, ΔT, can be determined as:

ΔT = final temperature - initial temperature= 19.3 °C - 20.7 °C= -1.4 °C (negative sign indicates that the temperature of the solution has decreased during the process)

Thus, the value of qreaction can be determined as:

qreaction = msΔT

= 53.810 g × 4.18 J/g °C × (-1.4 °C)

= -321.54 J (negative sign indicates that the heat has been absorbed by the solution)

Therefore, the value of qreaction (in J) for the given process is -321.54 J.

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Soil salinization occurs when the soil becomes too high in salt content, which can be harmful to plants. This can happen due to a variety of factors, including irrigation with salty water, natural salt deposits in the soil, or high levels of salt in the air.

One solution to prevent soil salinization is to use irrigation techniques that minimize the amount of salt that is introduced to the soil. For example, drip irrigation and other low-volume irrigation methods can help to reduce the amount of salt that is applied to the soil. Another solution is to use a soil amendment, such as gypsum, to help remove excess salt from the soil.

One disadvantage of using a soil amendment to remediate soil salinization is that it can be expensive to apply. Additionally, it may not be effective in all cases, depending on the specific cause of the soil salinization and the type of soil.

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The force occurs when the player kicks the ball is a contact force.

When the player kicks the ball, a force called a "contact force" occurs. This force is exerted by the player's foot on the ball, causing it to move forward.

b. Contact forces are forces that occur when two objects are in direct physical contact with each other. In this case, the player's foot is in contact with the ball, so the force exerted is a contact force.

c. As the ball soars through the air, a force called "gravitational force" is acting on the ball. This force is pulling the ball downwards towards the ground.

d. Gravitational force is a "non-contact force". It is a force that does not require physical contact between two objects to occur.

e. The force that brings the ball back down to the ground is also the gravitational force. As the ball rises into the air, it loses speed and momentum, and eventually the force of gravity overcomes the ball's upward motion, causing it to fall back down to the ground.

f. As mentioned earlier, the force that brings the ball back down to the ground is the gravitational force, which is a non-contact force.

Therefore, the force that brings the ball back down to the ground is also a non-contact force.

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Conducting nanoparticles are strongly attracted to the electrodes because of electrostatic forces.

The nanoparticles have a net charge that is attracted to the oppositely charged electrodes. Other components of the blood, such as cells, proteins, and other molecules, are not strongly attracted to the electrodes because they are not electrically charged.

Additionally, these components can interact with the nanoparticles, either by forming physical bonds with them or by affecting their electrical properties. These interactions can also cause the components to move towards the electrodes.

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Answer:

increases

Explanation:

it turns out that an object increases as the square of it's speed.

Answer:

Explanation:

In all physical processes taking place in closed systems, the amount of change in kinetic energy is equal to the amount of change in potential energy. If the kinetic energy increases, the potential energy decreases, and vice-versa. this equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. so therfore stays the same as the object so it would speed up as well.

Answer:

0.9941939

Explanation:

Answer:

0.000001 joule

Explanation:

brainlest?

To make a 2 M solution from an 18 M solution, you will need to dilute it by a factor of 9. (C1V1 = C2V2) denotes the relationship between the initial concentration (C1), initial volume (V1), final concentration (C2), and final volume (V2)

A concentrated solution has a high solute to solvent ratio, meaning there is a large amount of solute (such as salt or sugar) dissolved in a small amount of solvent (such as water). A diluted solution has a low solute to solvent ratio, meaning there is a small amount of solute dissolved in a large amount of solvent.

Knowing how to dilute a solution is important in many scientific and medical applications, as it allows us to create solutions with specific concentrations that are needed for experiments or treatments.

Dilution can also be used to reduce the toxicity or reactivity of a substance, making it safer to handle or use.

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Answer:

The following is the correct match:  

1. Luster refers to how the reflection of the light takes place from a mineral.  

2. Cleavage signifies a manner in which the dissociation of a mineral occurs at the time of stress.  

3. Streak helps in the identification of a true and natural color of a mineral.  

4. Color is the least reliable characteristic of determination.  

5. Hardness is determined with the application of the Mohs scale.  

Created by considering different compounds and their ability to form hydrogen bonds with water molecules. Here's a series that shows increasing hydrogen bonding.

Methane (CH4): Methane consists of only nonpolar covalent bonds and lacks hydrogen bonding. It does not readily form hydrogen bonds with water.

Ethanol (CH3CH2OH): Ethanol contains a hydroxyl (-OH) functional group, which can participate in hydrogen bonding. It can form hydrogen bonds with water, but its hydrogen bonding ability is relatively weaker compared to other compounds in the series.

Acetic Acid (CH3COOH): Acetic acid contains a carboxyl (-COOH) functional group, which can form hydrogen bonds with water. It has a stronger ability to form hydrogen bonds compared to ethanol due to the presence of an additional oxygen atom.

Glycolic Acid (HOCH2COOH): Glycolic acid possesses two hydroxyl groups, allowing for more hydrogen bonding interactions with water. It can form stronger hydrogen bonds compared to acetic acid.

Glycerol (C3H8O3): Glycerol contains three hydroxyl groups, enhancing its ability to form hydrogen bonds with water. The multiple hydroxyl groups increase the number of potential hydrogen bonding sites, resulting in stronger interactions with water.

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Yes, the chemist can identify the substance in the sample.

When describing a compound's mass per mole, the term "molar mass" is employed. The molar mass is determined by multiplying the individual masses of all the atoms that make up a compound.

K₂O has a molar mass of 94.2 g/mol.

has a molar mass of 110.196 g/mol.

By multiplying the masses of each individual atom—one K atom weighs 39.0983 g/mol, whereas one O atom weighs 15.999 g/mol—the molar masses are obtained.

When the mass of a pure compound is known, the mass of oxygen (O) can be calculated by subtracting the mass of potassium (K) from the total mass. Since each of the mentioned compounds contain two K atoms, the difference in oxygen mass can be utilised to identify the pure chemical.

For instance, after deducting the mass of the K from the unknown molecule, the residual mass will be approximately 16 g if the compound is K₂O and approximately 32 g if the compound is K2O2.

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The complete question is

The compound K2O2 exists. A chemist can determine the mass of K in a sample of known mass that consists of either pure K₂O or pure K2O2. From this information, can the chemist answer the question of which compound is in the sample? Explain

An example of convection that you have experience recently at home,at school,or outside is the radiator.

Convection is defined as a process of transfer of heat from a body with higher temperature through the movement of hot air away from the body into the environment.

A typical example of convection that is commonly used is the radiator.

The radiator is used to put warm air out at the top and draw in cooler air at the bottom of a building.

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Answer:

A heatwave occurs when a system of high atmospheric pressure moves into an area and lasts two or more days.

Explanation:

In such a high-pressure system, air from upper levels of our atmosphere is pulled toward the ground, where it becomes compressed and increases in temperature.

Answer:

Milk of Magnesia would consume the most stomach acid at almost 3 times the amount as baking soda.

Explanation:

Baking Soda = NaHCO3(s)+HCl(aq)=H20(l)+CO2(g)

NaHCO3 Molar mass of 84.007 g/mol

0.012 Moles of NaHCO3 and since an equal ratio of HCl is required

we therefore neutralize 0.012 Moles of HCl

Milk of magnesia = Mg(OH)2(s)+2HCl(aq)=2H20(l)+MgCl2(aq)

Mg(OH)2(s) Molar mass: 58.3197 g/mol

0.017 Moles of Mg(OH)2 and the ratio is 2:1, so 2 moles for each 1 mole of Mg(OH)2, so we need 0.034 Moles of HCl

Answer:

Protons:

- positive

- aka cation

- in the nucleus along with the neutrons

Electrons:

- negative

- aka anion

- situated in the orbital shells/configuration levels (there are many names)

The volume of the diamond if 3.51 g/cm3 is density and 0.2 g is the mass of the diamond.

Density is defined as the ratio of mass of the substance to the volume of the substance.

Density = mass/ volume.

The bonds between carbon atoms within each layer of graphite are strong. The bonds between carbon atoms that connect different layers of graphite are weak because the shared electrons in these bonds are loosely held by carbon atoms. Graphite is conductive in nature.

The crystal structure of diamond is a strong network of atoms in which the shared electrons are strongly held by the carbon atoms. Diamond is insulator in nature.

Now, it is given that density of diamond = 3.51 g/cm3.

Mass of diamond given = 0.200 gram

By substituting all the values, we get

Volume = 0.2/3.15

= 0.63 cm3.

Thus, we concluded that the volume of the diamond if 3.51 g/cm3 is density and 0.2 g is the mass of the diamond.

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Answer: It depends

Explanation: If you’re using an electric kettle then yes, it’s true!

A base, according to the Arrhenius definition, is any species that increases the concentration of OH- in the solution. Some examples of bases are, NaOH, KOH, LiOH, all these substances will increase the concentration of OH when dissolved. Letter C