Suppose 1.87g of nickel(II) bromide is dissolved in 200.mL of a 52.0mM aqueous solution of potassium carbonate. Calculate the final molarity of nickel(II) cation in the solution. You can assume the volume of the solution doesn't change when the nickel(II) bromide is dissolved in it.

In this reaction, aqueous solutions of lithium fluoride and potassium chloride are mixed, but no precipitate forms. This is because the products of the reaction (LiCl and KF) are both soluble in water, and therefore remain in the aqueous state.

Reaction is a process in which a system changes in response to an external stimulus. It is a response to an action, event, or phenomenon, and it is typically expressed in the form of an observable physical or mental change. Reactions can take place in a variety of forms, including chemical reactions, physical reactions, and psychological reactions. Chemical reactions are the most common type of reaction and involve the rearrangement of atoms and molecules in order to form new substances. Physical reactions involve changes in the physical properties of a system, such as changes in temperature, pressure, or volume. Psychological reactions include changes in behavior and emotion.

The complete and balanced molecular equation for the reaction between aqueous solutions of lithium fluoride and potassium chloride is:
LiF (aq) + KCl (aq) → LiCl (aq) + KF (aq)
The complete ionic equation for this reaction is:
Li+ (aq) + F- (aq) + K+ (aq) + Cl- (aq) → Li+ (aq) + Cl- (aq) + K+ (aq) + F- (aq)

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The enthalpy change (ΔH) for the reaction CaC(s) + H2O(I) → Ca(OH)(ag) + CH4(g) is -3617.6 kJ.

To calculate ΔH for the reaction CaC(s) + H2O(l) → Ca(OH)2(ag) + CH4(g), we can use Hess's law, which states that the enthalpy change of a reaction is independent of the pathway taken and depends only on the initial and final states.

We can manipulate the given reactions to obtain the desired reaction:

(i) Ca(s) + 2C(graphite) → CaC2(s) ΔH = X (unknown value)

(ii) Ca(s) + 1/2O2(g) → CaO(s) ΔH = -635.5 kJ

(iii) CaO(s) + H2O(l) → Ca(OH)2(ag) ΔH = -653.1 kJ

(iv) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH = -1300.0 kJ

(v) C(graphite) + 1/2O2(g) → CO(g) ΔH = -393.5 kJ

Now, let's manipulate these equations to cancel out the common reactants and products and obtain the desired reaction:

(i) Ca(s) + 2C(graphite) → CaC2(s) ΔH = X

(ii) Ca(s) + 1/2O2(g) → CaO(s) ΔH = -635.5 kJ

(iii) CaO(s) + H2O(l) → Ca(OH)2(ag) ΔH = -653.1 kJ

(iv) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH = -1300.0 kJ

(v) C(graphite) + 1/2O2(g) → CO(g) ΔH = -393.5 kJ

Now, let's sum up the equations to obtain the desired reaction:(i) Ca(s) + 2C(graphite) → CaC2(s) ΔH = X

(ii) 2Ca(s) + O2(g) → 2CaO(s) ΔH = -1271 kJ

(iii) CaO(s) + H2O(l) → Ca(OH)2(ag) ΔH = -653.1 kJ

(iv) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH = -1300.0 kJ

(v) C(graphite) + 1/2O2(g) → CO(g) ΔH = -393.5 kJ

By adding equations (ii), (iii), (iv), and (v), we can cancel out CaO(s), H2O(l), and O2(g):

2Ca(s) + 2C(graphite) + CH4(g) → 2Ca(OH)2(ag) + CO(g) ΔH = X -1271 -653.1 -1300.0 -393.5

2Ca(s) + 2C(graphite) + CH4(g) → 2Ca(OH)2(ag) + CO(g) ΔH = X -3617.6 kJ

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If a compound has no lone pairs, it normally takes the linear geometry:

Because of the bonds and the electrostatic forces, the conformation has to be linear to be a stable compound. Then, the answer is D.

You would recover 36.525g of NaCl after evaporating all of the water.

To find the grams of NaCl that would be recovered after evaporating all the water, we can use the following formula:

mass = moles * molar mass

Where:

Moles = Molarity * Volume

Molarity = 0.250 M

Volume = 2500.0 mL = 2.5 L

Molar mass of NaCl = 58.44 g/mol

mass = 0.250 M * 2.5 L * 58.44 g/mol

mass = 36.525 g

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The greenhouse gases work by magnifying incoming solar radiation on earth's surface, just like a magnifying glass. this statement is wrong.

The greenhouse gases will increased the level of human produced carbon dioxide. the greenhouse gases is the gas that will absorb the radiation or emits the radiation energy in the range if infrared range. the  main types of greenhouse gases are given as follows :

The given statement about the greenhouse gas is not correct that : The greenhouse gases work by magnifying incoming solar radiation on earth's surface, like the greenhouse.

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Answer

The mole ratio of H2O to H2SO4 is 2:1

Explanation

Given chemical equation:

From the balanced chemical equation above, 2 moles of NaOH react with sulfuric acid, 1 mole of H2SO4, to produce 2 moles of water and 1 mole sodium sulfate.

So, from the chemical equation, you have a 2:1 mole ratio between H2O and H2SO4

Answer:

ok

Explanation:

khfdnkv Klein pick pick or en la Web outta

Answer:

20auhhdkdkkdJkrijsuofsyo

Answer:

Guys’ search it up on math thank me later

Explanation:

dhsjdjsusysgtjghtd fjfhfhcchdh

The y axis is concentration since  the amounts of reactants and products remain constant after equilibrium is reached.

In a chemical reaction system, equilibrium is said to be attained when the rate of forward reaction and the rate of reverse reaction are equal. This is indicated by the straight line.

Therefore, the correct label for the y axis is concentration, because the amounts of reactants and products remain constant after equilibrium is reached.

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What best explains the label that the student should use on the y-axis?

D. Concentration as the concentrations of reactants and products remain constant after equilibrium is reached

Answer:

i

Explanation:

Answer:1

Explanation:v

Answer:

A logic bomb and a time bomb are both types of malicious software or code that are designed to cause harm to a computer system or network. Here's a brief explanation of each:

Logic Bomb:

A logic bomb is a piece of code or software that is intentionally inserted into a system to execute a malicious action when specific conditions are met. It remains dormant until triggered by a predefined event or circumstance, such as a specific date, time, or user action. Once triggered, the logic bomb may perform various harmful actions, such as deleting files, corrupting data, or disrupting system functionality. The purpose of a logic bomb is often to cause damage or to gain unauthorized access to a system.

Time Bomb:

A time bomb is similar to a logic bomb, but it is specifically designed to activate or execute its malicious payload at a certain date or time. It is usually programmed to remain undetected until the predetermined time arrives. The time bomb can be set to trigger after a specific time period or on a particular date, at which point it may carry out destructive actions. Time bombs can be used by attackers to target specific events or to coordinate an attack to occur simultaneously across multiple systems.

Both logic bombs and time bombs are considered forms of malicious code or malware and are used with malicious intent to disrupt, damage, or compromise computer systems or networks. They can be extremely harmful, and it is important to have strong security measures, such as antivirus software and regular system updates, to protect against such threats.

Explanation:

In the given reaction, the limiting reactant is C₆H₆ (benzene).

To determine the limiting reactant as well as calculate the mass of HCl produced, compare the moles of each reactant.

The number of moles for each reactant:

Molar mass of Cl₂ = 35.5 g/mol + 35.5 g/mol = 71 g/mol

Moles of Cl₂ = mass of Cl₂ / molar mass of Cl₂

                     = 45 g / 71 g/mol

                     = 0.634 moles of Cl₂

Molar mass of C₆H₆ (benzene) = 12 g/mol + 6(1 g/mol) = 78 g/mol

Moles of C₆H₆ = mass of C₆H₆ / molar mass of C₆H₆

                        = 45 g / 78 g/mol = 0.577 moles of C₆H₆

Determine the stoichiometry between Cl₂ and HCl:

Cl₂ + C₆H₆ → C₆H₅Cl + HCl

Here, we can see that 1 mole of Cl₂ produces 1 mole of HCl.

Thus, the limiting reactant is C₆H₆ (benzene).

Calculate the mass of HCl produced:

Molar mass of HCl = 1 g/mol + 35.5 g/mol = 36.5 g/mol

Moles of HCl produced = moles of C₆H₆ = 0.577 moles

Mass of HCl produced = moles of HCl produced × molar mass of HCl

Mass of HCl produced = 0.577 moles × 36.5 g/mol

                                     ≈ 21.04 g

Therefore, approximately 21.04 grams of HCl will be produced.

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Answer:

B 1650

Explanation:

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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Answer:B

Explanation:

When molecules collide, there is generally a delay before an explosion occurs, if an explosion occurs at all. This is because an explosion requires a chemical reaction to take place, which involves the breaking of chemical bonds and the formation of new bonds. These reactions require a certain amount of energy, which is called the activation energy.

The collision of molecules can provide energy to the system, but it is not always enough to overcome the activation energy needed for a chemical reaction to occur. If the energy of the collision is less than the activation energy, no reaction will occur and there will be no explosion. If the energy of the collision is equal to or greater than the activation energy, a chemical reaction may occur and an explosion may result.

The time delay between the collision of molecules and an explosion occurring depends on the nature of the molecules and the conditions under which the collision occurs. Some chemical reactions are very fast and can occur almost instantly, while others may take longer to reach the activation energy and proceed to completion.

It's worth noting that not all collisions between molecules result in an explosion. In many cases, the collision may simply transfer energy from one molecule to another without leading to a chemical reaction.

Answer:

720

Explanation: study island

Answer:

720

Explanation:

Answer:c1h3o1

Explanation:

Ahahah I’m getting points nah jp here

C1h3o1

According to Le Châtelier’s principle or reactions in chemical equilibrium;

2 NH₃ (g) → 3 H₂ (g) + N₂(g) : addition of N₂ shifts equilibrium to the left

N₂ (g) + O₂(g) → 2 NO (g) : addition of N₂ shifts equilibrium to the right

2 NO (g) → N₂ (g) + O₂ : addition of N₂ shifts equilibrium to the left

4 NH₃ (g) + 3 O₂ (g) → 2 N₂ (g) + 6 H₂O (g) : addition of N₂ shifts equilibrium to the left

Equilibrium in a chemical reaction refers to the point in a chemical reaction in which the rate of the formation of product from the reactants or the forward reaction is equal to the rate of formation of reactants from products or the backward reaction.

For equilibrium to be achieved in a chemical reaction the reaction must occur in a closed or isolated system.

The condition that occur in a reaction in equilibrium are described by Le Châtelier’s principle which states that for a reaction in equilibrium, the equilibrium position will shift to annul any constraint or change imposed on the system.

Considering the given reactions:

2 NH₃ (g) → 3 H₂ (g) + N₂(g) : addition of N₂ shifts equilibrium to the left

N₂ (g) + O₂(g) → 2 NO (g) : addition of N₂ shifts equilibrium to the right

2 NO (g) → N₂ (g) + O₂ : addition of N₂ shifts equilibrium to the left

4 NH₃ (g) + 3 O₂ (g) → 2 N₂ (g) + 6 H₂O (g) : addition of N₂ shifts equilibrium to the left

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Answer:

A person doing physical work needs lots of good carbohydrates to keep their energy levels up and proteins to repair a muscle that might get wear and tear from overexertion. Carbohydrate will help the person work for more extended periods.

Answer:

1 atm

Explanation:

Step 1: Write the balanced equation

NH₄OH(aq) ⇒ H₂O(l) + NH₃(g)

Step 2: Calculate the moles corresponding to 8 g of NH₄OH

The molar mass of NH₄OH is 35.04 g/mol.

8 g × 1 mol/35.04 g = 0.2 mol

Step 3: Calculate the moles of NH₃ formed from 0.2 moles of NH₄OH

The molar ratio of NH₄OH to NH₃ is 1:1. The moles of NH₃ formed are 1/1 × 0.2 mol = 0.2 mol

Step 4: Calculate the pressure of 0.2 moles of NH₃ in a container of 5.00 L at 25 °C (298 K)

We will use the ideal gas equation.

P × V = n × R × T

P = n × R × T / V

P = 0.2 mol × 0.0821 atm.L/mol.K × 298 K / 5.00 L

P = 1 atm

The period of a wave is directly proportional to the wavelength of the wave. True

Period is the time it takes to complete one cycle of a wave, and wavelength is the distance between two identical locations in the neighbouring cycles of a wave. The number of cycles in a second is defined as frequency. In other terms, frequency = 1 / period.

An electromagnetic wave's wavelength is proportional to its frequency. Likewise, an electromagnetic wave's frequency is equal to the reciprocal of its period.

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The enthalpy of combustion for 1kg of urea is -1223525.84 J/mol.

Urea is a compound that is used in fertilizers and in some plastics.The enthalpy of combustion for urea is the amount of energy that is released when urea is burned. In order to calculate the enthalpy of combustion for 1kg of urea, we need to use the information that is provided to us in the question. Let us start by writing down the balanced equation for the combustion of urea: CO(NH2)2 + 3/2 O2 → CO2 + 2H2O + N2
The balanced equation shows that 1 mole of urea reacts with 1.5 moles of oxygen gas to produce 1 mole of carbon dioxide, 2 moles of water, and 1 mole of nitrogen gas. The enthalpy change for this reaction is equal to the amount of energy that is released when 1 mole of urea is burned.
The heat of combustion (ΔHc) of urea is -632.6 kJ/mol. This means that 632.6 kJ of energy is released when 1 mole of urea is burned. We know that 12g of urea raised the temperature of water by 30°C. We can use this information to calculate the amount of energy that was released when 12g of urea was burned.
The specific heat capacity of water is 4.18 J/g°C. This means that it takes 4.18 J of energy to raise the temperature of 1 gram of water by 1°C. Therefore, it takes 4.18 x 1000 = 4180 J of energy to raise the temperature of 1 kg of water by 1°C.
We know that 12g of urea raised the temperature of water by 30°C. Therefore, the amount of energy that was released when 12g of urea was burned is:
Energy = mass x specific heat capacity x temperature change
Energy = 0.012 kg x 4180 J/kg°C x 30°C
Energy = 1497.6 J
We can now use this information to calculate the enthalpy of combustion for 1kg of urea:
Enthalpy of combustion = energy released / moles of urea burned
Enthalpy of combustion = 1497.6 J / (0.012 kg / 60.06 g/mol)
Enthalpy of combustion = - 1223525.84 J/mol
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Answer:

wouldnt they still have the same density?

Explanation:

for example, the density of iron is 7.874 g/cm^3 no matter how big the piece is. I hope this helps.

(a) The solubility product expression for Ag2CO3 is:

Ksp = [Ag+]^2[CO3^2-]

(b) The solubility product expression for Hg2Cl2 is:

Ksp = [Hg2^2+][Cl^-]^2

The qualities Tom Walker and his wife have in common were they both were grasping and without conscience

The question has been asked from the story "The Devil and Tom Walker" by Washington Irving. As the story describes Tom's encounter with the devil, he is a complex character. However, he and his wife seem to complement each other well and have some personality traits in common. Tom and his wife are both miserly, avaricious, cruel, and morally void.

More so than her husband, Tom's stereotypically nagging, scolding wife verbally and perhaps even physically abuses him when she's not hoarding his valuables. Tom's wife courageously decides to accept Old Scratch's offer to sell her husband's soul for money when Tom first rejects it. She takes the family's silver into the swamp with her so she may haggle with the devil.

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Ca(OH)₂ having a different solubility with a change in pH. Option 3 is correct.

The solubility of a compound can be affected by changes in pH when the compound has acidic or basic properties. If the compound can undergo an acid-base reaction in solution, the solubility may be influenced by the pH of the solution.

Out of the given compounds, the compound that can undergo an acid-base reaction and show a different solubility with a change in pH is Ca(OH)₂ (option 3). This compound is a strong base and can react with protons (H⁺) in solution to form Ca²⁺ ions and water molecules:

Ca(OH)₂ + 2 H⁺ → Ca²⁺ + 2 H2₂O

As the pH of the solution decreases (i.e. becomes more acidic), the concentration of H⁺ ions in solution increases, favoring the reaction to the left and decreasing the solubility of Ca(OH)₂.

Conversely, as the pH of the solution increases (i.e. becomes more basic), the concentration of H⁺ ions in solution decreases, favoring the reaction to the right and increasing the solubility of Ca(OH)₂.

Hence, 3. Ca(OH)₂ is the correct option.

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It is not anticipated that the other salts, which lack basic anions, will be more soluble in acidic solution: BaF2, Hg2Br2, NiS and AgI. Al(OH)3 and PbCl2 are more soluble in acidic solution than in pure water.

Due to the formation of a weak acid and aluminum salt when aluminum phosphate reacts with acid, it is more soluble in acid than water. Acids are therefore better than water at dissociating aluminum phosphate.

A weak acid's salt will dissolve more readily in acid than in water. As a result, a strong acid is the source of NaCl, MgCl2, and NaNO3 (HCl). Since CaCO3 is the salt of the weak acid H2CO3, it will dissolve in H+ more readily than in water.

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