If 40.5 g of KCI are dissolved 250.0 g of water at 25.0 °C in an insulated container, a temperature change is observed. The AH of solution of KCI is 17.2 kJ/mol. Assuming that the specific heat of the solution is 4.184 J/(g
°C), and that no heat is gained or lost by the container, what will be the final temperature of the solution?

Ai. The car's initial kinetic energy is 22657.94 J

Aii. The car's initial potential energy is 939960.1 J

B. The car's final kinetic energy is 171420.38 J

C. The car's change in kinetic energy is 148762.44 J

Ai. How do I determine the car's initial kinetic energy?

We can obtain the initial kinetic energy of the car as illustrated below:

KE₁ = ½mu²

KE₁ = ½ × 566.99 × 8.94²

KE₁ = 22657.94 J

Aii. How do I determine the car's initial potential energy?

The car's initial potential energy can be obtained as shown below:

PE₁ = mgh

PE₁ = 566.99 × 9.8 × 169.164

PE₁ = 939960.1 J

B. How do I determine the car's final kinetic energy?

The final kinetic energy of the car can be obtained as illustrated below:

KE₂ = ½mv²

KE₂ = ½ × 566.99 × 24.59²

KE₂ = 171420.38 J

C. How do I determine the car's change in kinetic energy?

The change in the kinetic energy of the car can be obtained as follow:

ΔKE = KE₂ - KE₁

ΔKE = 171420.38 - 22657.94

ΔKE = 148762.44 J

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Answer:

Collecting data

Explanation:

Scientific inquiry can be explained as methods undertook by scientists to profer solutions, explanations, predict natural occurence and to some extent solve some of the problems of the earth through scientific study and processes. Evidence of solutions is made available to be built upon by also other scientists in the near future.

process of scientific inquiry include, in no particular order:

Note, that the explanation below doesn't follow any order.

1. Formulating questions: This is the problem that needed to be solved. Scientific inquiries usually begin with a question that can be proven scientifically.

2. Observation: taking neccessary information for the experiment.  Collecting data (answer to the question) falls under this process as information collected are used to carry out the experiment.

3. Hypothesis: Based on the observation and test carried out, scientists provide answers to the experiment, however methods used remain open for further experiments by other scientists. This is done so the results are tested and proven before they can be generally accepted as a rule or law.

4. Experiment: the experiment is carried out here.

5. Data analysis: Here the data collected are analysed using scientific methods.

6. Results: This stage shows the other aforementioned stages took place. Results of the scientific research/experiment are published.

Answer:collecting data

Explanation:i did it on study island

Answer:

I sent u on insta

Explanation:

Found it

The electric current is  0.025 A

Electric current refers back to the go with the flow of energy in an electronic circuit and to the amount of strength flowing through a circuit. it's far measured in amperes (A). the bigger the cost in amperes, the more energy is flowing within the circuit.

Ag+ + e¯ →Ag

1F deposits 107.87 g/mol (molecular mass) of silver

1F = 96500 C

Let, 107.87 g/mol needed = 96500 C

Number of coulombs required to deposit 0.3650 g of silver =(96500/107.87) 0.3650  

Q = 326.5 C

According to Faraday’s law, Q = I x t

I = 326.5 C / (216 x 60 s) = 0.025 A

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Answer:

C.

Explanation:

Answer:

1 mole KClO3 / 122.55 g KClO3,

3 mole O2 / 2 mole KClO3,

31.998 g O2 / 1 mole O2.

Explanation:

First, let's convert 10 g of KClO3 to moles using the molar mass of KClO3 which is 122.5 g/mol:

Now you can see in the chemical equation that 2 moles of KClO3 reacted produces 3 moles of O2, so we state a rule of three to find the number of moles of O2:

The calculation of this will look like this:

The final step to finding the mass of oxygen (O2) is using its molar mass which is 32 g/mol, like this:

As you can see from this process, the needed ratios are:

1 mole KClO3 / 122.55 g KClO3,

3 mole O2 / 2 mole KClO3,

31.998 g O2 / 1 mole O2. (in the explanation is approximated)

Answer:

nah

Explanation:

l though Most Salt are soluble in water (Properties of Ionic Compound) , Not all are soluble ,which means mixing a salt and water can produce either a Solution (homogeneous mixture) or a Suspension (heterogeneous mixture).

Answer:

Solution

Explanation:

The solved dissolves on the solute, creating a homogeneous substance

The temperature of a 1.7379 mole of a gas with a pressure of 1.4948 atm and volume of 92.202 L is 965.69K .

The temperature of a given gas can be calculated using the ideal gas law equation:

PV = nRT

Where;

1.4948 × 92.202 = 1.7379 × 0.0821 × T

137.82 = 0.142T

T = 137.82 ÷ 0.142

T = 965.69K

Therefore, the temperature of a 1.7379 mole of a gas with a pressure of 1.4948 atm and volume of 92.202 L is 965.69K.

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Answer:

Explanation:

The subscripts in a formula determine the ratio of the moles of each element in the compound. To convert this formula to the empirical formula, divide each subscript by 2. This is similar to reducing a fraction to its lowest denominator.

To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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Answer:

Mechanical

Explanation:

According to the claim, Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303. (orange is 1.303 times more effused than blue).Relative rate of effusion for the orange to blue spheres = 1.531.

The process of effusion is when a gas escapes from a container through a hole that is significantly smaller in diameter than the molecules' mean free path.

Gas molecules flow through a small opening in one container and into another by effusion. Graham's law allows rates of effusion to be compared at the same temperature. Diffusion is the random molecular motion-based movement of gas molecules through one or more other types of gas.

Rate of effusion of Orange / Rate of effusion of blue

= [Mblue / Morange]^1/2

Vrms = sqrt [(3RT/M)]

Vorange / Vblue = [ Mblue / Morange]^1/2

Rate of effusion of Orange / Rate of effusion of blue

= 565/ 369

= 1.531

Thus,  Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303.

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The highest boiling point based on the data is option 4

Compared to alcohols of comparable molecular weight, carboxylic acids often have higher boiling temperatures. Between the hydrogen atoms of adjacent molecules and the oxygen in the carboxyl group of carboxylic acids, strong intermolecular hydrogen bonds can develop. Because it takes more energy to break the intermolecular interactions and change the substance from a liquid to a gas during boiling, these hydrogen bonds help materials have higher boiling temperatures.

Although carboxylic acids and alcohols are both capable of forming hydrogen bonds, carboxylic acids have higher boiling temperatures due to the extra carboxyl group that they contain.

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To get the reaction started in the given simulation where initially no reaction occurs between zinc (Zn) and copper (II) sulfate (CuSO4), a process called activation energy must be overcome.

Activation energy refers to the minimum energy required for a chemical reaction to occur. In the case of the reaction between zinc and copper (II) sulfate, there are a few possible methods to initiate the reaction and overcome the activation energy barrier:

1. Heat: Applying heat to the system increases the kinetic energy of the reactant particles, causing them to move more rapidly. This increased energy enables more collisions between the zinc and copper (II) sulfate reactant particles, causing them to move more rapidly. This increased energy enables more collisions between the zinc and copper (II) sulfate particles, increasing the chances of successful collisions and the likelihood of the reaction occurring.

2. Catalysis: A catalyst is a substance that lowers the activation energy of a reaction without itself being consumed in the process. Adding a suitable catalyst to the system provides an alternative reaction pathway with a lower activation energy, making it easier for the reactants to transform into products. In the case of the zinc-copper (II) sulfate reaction, certain catalysts like platinum or copper wire can facilitate the reaction.

3. Mechanical agitation: Stirring or shaking the reaction mixture increases the contact between the reactant particles, enhancing the frequency of collisions. This promotes the chances of effective collisions and increases the likelihood of successful reactions.

By implementing any of these methods, the activation energy barrier can be surmounted, allowing the zinc and copper (II) sulfate to initiate the reaction and proceed towards the formation of zinc sulfate (\(ZnSO_{4}\)) and copper. Once the reaction begins, it can continue on its own as long as there are sufficient reactants and the reaction conditions remain favorable.

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Answer:

density

Explanation:

density, volume holds fluid, and temperature is negligible

Explanation:

A nitrogen-containing compound that shows no absorption band at around 3400 cm^−1 and no absorption bands between approximately 1700 cm^−1 and 1600 cm^−1 is likely an amide compound.

Amides typically exhibit a characteristic absorption band in the region of 3200-3500 cm^−1 due to the N-H stretching vibration. The absence of this absorption band suggests the absence of N-H bonds, which rules out compounds like primary or secondary amines.

The absence of absorption bands between 1700 cm^−1 and 1600 cm^−1 eliminates functional groups such as carbonyl compounds (e.g., aldehydes, ketones, carboxylic acids, esters) and imines, which typically exhibit absorption in this region.

Therefore, based on the given information, it can be inferred that the compound is likely not an amine, carbonyl compound, or imine. Other classes of compounds that do not possess these characteristic absorption bands would need to be considered.

Answer:

ggggg1ggg2gg

Explanation:

Answer:

The correct answer is "\(4.991\times 10^{-45} \ kg.m^2\)".

Explanation:

According to the question,

\(R_{C-Cl} = 177 \ pm\)

or,

         \(=1.77\times 10^{-10} \ m\)

\(\alpha = 107^{\circ}\)

\(m_{Cl}=34.97 \ m.u\)

or,

      \(=34.97\times 1.66\times 10^{-27}\)

      \(=5.807\times 10^{-26} \ kg\)

The moment of inertia around the rotational axis will be:

⇒  \(I=3\times m_{Cl}\times (R_{C-Cl})^2 \ Sin^2 \alpha\)

By putting the values, we get

       \(=3\times 5.807\times 10^{-26}\times (1.77\times 10^{-10})^2 \ Sin^2 (107)\)

       \(=3\times 5.807\times 10^{-26}\times (1.77\times 10^{-10})^2\times 0.91452\)

       \(=4.991\times 10^{-45} \ kg.m^2\)

Answer:

soap

Explanation:soap

Answer:

A molecule with polar and nonpolar ends

Explanation:

Answer:

Isotopes

Explanation:

iso means the same like in triangles (isosceles) so the atoms are the same element but different in mass. Since the isotopes have the same number of protons and electrons the isotopes have much the same chemical behavior. Since the isotopes have different numbers of neutrons the nuclear behavior differs.

Answer:

If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

Answer:Electrical Conductivity,soluble

Explanation:

Salt is a non-magnetic solid and is soluble in water. Sand is a non-magnetic solid and is insoluble in water.

Electrical Conductivity: Salt is an electrolyte and conducts electricity when dissolved in water or in a molten state. This is because salt dissociates into ions (Na+ and Cl-) that can carry electric current. In contrast, sand is a covalent compound and does not conduct electricity, as it does not dissociate into ions in the same way as salt. Sand is considered an insulator in terms of electrical conductivity.

In order to lower the temperature of 350 mL of water from 24°C to 6°C, we need to calculate the amount of heat energy that needs to be removed from the water. We can use the formula:

Q = mcΔT

where Q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

The specific heat capacity of water is 4.184 J/g°C. Since the density of water is 1.0 g/mL, the mass of 350 mL of water is 350 g.

Q = (350 g) (4.184 J/g°C) (18°C)

Q = 30,276 J

To remove this much heat energy, we can use ice to cool the water. The heat of fusion of water is 333.55 J/g, which is the amount of heat energy required to melt one gram of ice at 0°C.

Q = (m)(333.55 J/g)

m = Q / 333.55 J/g

m = 30,276 J / 333.55 J/g

m = 90.4 g

So, 90.4 grams of ice at 0°C would have to melt to lower the temperature of 350 mL of water from 24°C to 6°C.

Answer:

C = 0.2349 J/ (g °C)

Explanation:

Mass, m = 894.0g

Initial Temperature = −5.8°C

Final Temperature =  17.5°C

Temperature change = 17.5°C - (−5.8°C) = 23.3

Heat, H = 4.90kJ = 4900 J

Specific heat capacit, C = ?

The relationship between these quantities is given by the equation;

H = mCΔT

C = H / mΔT

C = 4900 / (894)(23.3)

C = 0.2349 J/ (g °C)

Answer:

The correct answer to this problem is B. 7.0 X 10^-8 meters

Explanation:

To solve this problem, we have to use the following equation:

c = λν, or speed of light = wavelength*frequency

If we substitute in the values we are given by the problem, we get:

3.00 * 10^8 m/s = (4.3 * 10^15 Hz)*(wavelength)

wavelength = 6.98 * 10^-8 m

Since the given value has 2 significant figures, our answer should similarly include two significant figures since the operation in the problem was multiplication.

Therefore, the answer is B. 7.0 X 10^-8 meters.

Hope this helps!

Answer:

A precipitate will form when a freshly prepared aqueous carbonic acid solution is added to an aqueous solution of Calcium Hydroxide.

Explanation:

A precipitate will form when a freshly prepared aqueous carbonic acid

solution reacts with an aqueous solution of Calcium Hydroxide

Ca(OH)₂ + H₂CO₃ → CaCO₃ + 2 H₂O

This is an example of a neutralization reaction between the acid ( H₂CO₃)

and a base ( Ca(OH)₂ ) to form a precipitate known as Calcium

carbonate(CaCO₃).

The product which is Calcium carbonate(CaCO₃) is also referred to as calcite

or chalk.

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