Is adding food coloring to frosting a chemical reaction?

Answer:

\(m_{PbI_2}=18.2gPbI_2\)

Explanation:

Hello,

In this case, we write the reaction again:

\(Pb(NO_3)_2(aq) + 2 KI(aq)\rightarrow PbI_2(s) + 2 KNO_3(aq)\)

In such a way, the first thing we do is to compute the reacting moles of lead (II) nitrate and potassium iodide, by using the concentration, volumes, densities and molar masses, 331.2 g/mol and 166.0 g/mol respectively:

\(n_{Pb(NO_3)_2}=\frac{0.14gPb(NO_3)_2}{1g\ sln}*\frac{1molPb(NO_3)_2}{331.2gPb(NO_3)_2} *\frac{1.134g\ sln}{1mL\ sln} *96.7mL\ sln\\\\n_{Pb(NO_3)_2}=0.04635molPb(NO_3)_2\\\\n_{KI}=\frac{0.12gKI}{1g\ sln}*\frac{1molKI}{166.0gKI} *\frac{1.093g\ sln}{1mL\ sln} *99.8mL\ sln\\\\n_{KI}=0.07885molKI\)

Next, as lead (II) nitrate and potassium iodide are in a 1:2 molar ratio, 0.04635 mol of lead (II) nitrate will completely react with the following moles of potassium nitrate:

\(0.04635molPb(NO_3)_2*\frac{2molKI}{1molPb(NO_3)_2} =0.0927molKI\)

But we only have 0.07885 moles, for that reason KI is the limiting reactant, so we compute the yielded grams of lead (II) iodide, whose molar mass is 461.01 g/mol, by using their 2:1 molar ratio:

\(m_{PbI_2}=0.07885molKI*\frac{1molPbI_2}{2molKI} *\frac{461.01gPbI_2}{1molPbI_2} \\\\m_{PbI_2}=18.2gPbI_2\)

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Answer:

2.5 moles of KOOH are produced.

Explanation:

1)Given data:

Number of moles of KOOH produced = ?

Number of moles of LiClO = 5 mol

Solution:

Chemical equation:

2LiClO +  KHSO₄     →      Li₂SO₄ + Cl₂ + KOOH

now we will compare the moles of KOOH and LiClO.

                 LiClO          :          KOOH

                    2              :              1

                   5               :             1/2×5 = 2.5

2.5 moles of KOOH are produced.

Answer:

From the information provided, it seems likely that substance A is an acid, and substance B is a carbonate. The fact that mixing the two substances results in bubbles or effervescence, and that a clear solution is formed, suggests that a chemical reaction is taking place.

Acids and carbonates react together to form a salt, water, and carbon dioxide gas. The reaction is as follow:

Acid + Carbonate → Salt + Water + Carbon Dioxide

The carbon dioxide gas forms bubbles in the solution and causes effervescence, and the clear solution formed is due to the fact that both the acid and the carbonate have reacted together to form the salt and water. This reaction is acid-base neutralization reaction as the acid and base will neutralize each other.

As for the acid, since it is said that B gives pH 3 solution after dissolved, it can be inferred that it is not an acid, otherwise it would be acidic. Therefore A which is insoluble is the acid.

As for the gas given off, it's Carbon dioxide.

Explanation:

The pressure of a sample of dry air is held constant 2.25 atm while the temperature is decreased from 100°C to 7.0°C. The original volume of the sample is 43 L. 32 L is the closest to the final volume of the sample?

A law states that the volume of an ideal gas at constant pressure is directly proportional to the absolute temperature.

Charles’ law:

\(\frac{V_1}{T_1}\) = \(\frac{V_2}{T_2}\)

The volume and temperature of a fixed amount of gas at a constant pressure are directly proportional.

To use the equation, the temperature must be in Kelvin.

\(V_2\) = \(\frac{V_1}{T_1} XT_2\)

\(V_2\) = 32 L

\(V_2\)= 32 L

Hence, the correct answer is B.

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The concentration of AB, in mol/dm³, after 6 minutes : 0.125

For first-order reaction :

\(\tt [A]=[A]oe^{-kt}\rightarrow t1/2=\dfrac{ln~2}{k}\)

The half-life of the reaction is 2 minutes⇒t1/2=2 minutes

The concentration of AB, in mol dm, after 6 minutes ⇒ t=6 minutes

The rate constant (k) :

\(\tt k=\dfrac{ln~2}{t1/2}=\dfrac{0.693}{2}=0.3465\)

The concentration after 6 minutes :

\(\tt [A]o=0.1~mol/100~cm^3=1~~mol/dm^3\\\\(A]=1\times e^{-0.3465\times 6}\\\\(A]=0.125\)

Answer:

A ) New rocks floating to the surface of the crust.

TRUST

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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Earth System A) The Water in River is Hydrosphere B) The Air around all of us is Atmosphere C) A Rock formation on mountain is Geosphere D) Plants And Fungi is Biosphere.

Land, water, living beings, and air are the four main subsystems that make up the Earth's system. The term "spheres" refers to these four subsystems. They are, successively, the "atmosphere," "lithosphere," "hydrosphere," and "biosphere" (air).

The four circles of the Earth are strongly connected to one another. While birds fly through the air (biosphere), water (hydrosphere) permeates the soil (atmosphere) (lithosphere or geosphere). The spheres of the earth are in close proximity to one another.

Understanding and providing crucial information on water supply, drought, climate and temperature extremes, ice sheets and sea levels, and land-use change are all possible with the use of earth system models. They aid in the understanding of how bacteria, plants, people, animals, and other living things all affect and contribute to the Earth's climate. So

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1. Rate law - A chemical reaction's rate and the concentrations of the reactants involved are correlated by an expression known as the rate law, commonly referred to as the rate equation.

Step (1) is the rate-determining step because it is the slow step, it determines the reaction's overall pace; therefore,

Rate law= K [H₂O₂]  [I⁻]

2. order of reaction = second order

The Order of Reaction describes how the rate of a reaction depends on the concentration of each component. As a result, the rate of a first-order reaction depends on the concentration of a single species.

3. First step is the rate determining step because it is the slow step. Slow step determines the rate.

The rate-determining step is the one that establishes the speed (rate) of the complete chemical reaction.

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Your question is incomplete. For missing part refer the image below.

The complete form of the table is:

1. For pH = 3.78:

[H₂O¹⁺] can be calculated using the formula [H₂O¹⁺] = 10^(-pH).

[H₂O¹⁺] = 10^(-3.78) = 1.58 x 10⁻⁴ M.

To find pOH, use the equation pOH = 14 - pH.

pOH = 14 - 3.78 = 10.22.

Since the concentration of [OH¹⁻] can be obtained by using the relation [OH¹⁻] = 10^(-pOH).

[OH¹⁻] = 10^(-10.22) = 6.31 x 10⁻¹¹ M.

Based on the pH value, this solution is acidic.

2. For [H₂O¹⁺] = 3.89 x 10⁻⁴ M:

Given the concentration of [H₂O¹⁺],  calculate the pH.

pH can be determined using the equation pH = -log[H₂O¹⁺].

pH = -log(3.89 x 10⁻⁴) ≈ 11.22.

The pOH can be calculated using the equation pOH = 14 - pH.

pOH = 14 - 11.22 ≈ 2.78.

Since the concentration of [OH¹⁻] is related to pOH as [OH¹⁻] = 10^(-pOH).

[OH¹⁻] = 10^(-2.78) ≈ 2.03 x 10⁻¹¹ M.

Based on the pH value, this solution is basic.

3. For pOH = 5.19:

To calculate the concentration of [OH¹⁻], use the relation [OH¹⁻] = 10^(-pOH).

[OH¹⁻] = 10^(-5.19) ≈ 6.05 x 10⁻⁶ M.

To find the pH, we can use the equation pH = 14 - pOH.

pH = 14 - 5.19 ≈ 8.81.

Since the pH is greater than 7, this solution is basic.

4. For [OH¹⁻] = 4.88 x 10⁻¹⁰ M:

Given the concentration of [OH¹⁻], calculate the pOH.

pOH = -log[OH¹⁻].

pOH = -log(4.88 x 10⁻¹⁰) ≈ 9.31.

To find the pH, use the equation pH = 14 - pOH.

pH = 14 - 9.31 ≈ 4.69.

Since the pH is less than 7, this solution is acidic.

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Answer:

Na(s)

Explanation:

irrespective of it's state, Sodium is an element and elements consists of only one kind of atom and cannot be broken down into a simpler type of matter by either physical or chemical means.

Explanation:

the definition of genuine:

genuinly means honestly or truley

Answer:

Minimum volume of water = 0.28 ml

Mass remaining in solution at 25°C = 0.156 g

Maximum mass of sodium benzoate that can be recovered = 0.044 g

Explanation:

solubility of sodium benzoate in boiling water (100°C) = 1 g/1.4 mL

minimum volume of boiling water required to dissolve 0.200 g of sodium benzoate = mass / solubility

minimum volume of water = 0.200 g / (1 g / 1.4 mL)

minimum volume of water = 0.28 ml

Solubility of sodium benzoate at 25°C = 1 g / 1.8 mL

Mass in solution = solubility x volume

Mass in solution = (1 g / 1.8 mL) x 0.28 mL

Mass remaining in solution at 25°C = 0.156 g

Maximum mass of sodium benzoate that can be recovered = 0.200 g -

0.156 g

Maximum mass of sodium benzoate that can be recovered = 0.044 g

The product of oxidation of 3-methyl-2-pentanol is 3-methyl-pentan-2-one.

The oxidation of alcohol produces aldehyde and ketones.

Alcohols are a class of substances that have one, two, or more hydroxyl (-OH) groups bonded to the single alkane bond. These substances all have the generic formula R-OH. They play a crucial role in organic chemistry since they can be altered or transformed into other chemicals, including aldehydes and ketones, among others. There are two distinct sorts of alcohol reactions. These reactions have the ability to break the R-O bond or even the O-H bond.

The oxidation process transforms the alcohols into aldehydes and ketones. One of the most significant reactions in the study of organic chemistry is this one.

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Answer:

not very likely

Explanation:

Answer:

Particle collisions cause pressure.

Explanation:

The fast motion of gas particles gives them a relatively large amount of kinetic energy. Recall that kinetic energy is the energy that an object possesses because of its motion. The particles of a gas move in straight-line motion until they collide with another particle or with one of the walls of its container.

Answer:

KCL

Explanation:

is more soluble in 100grams of H2O at 70 degrees Celsius?

The statement that best described how the space program improved the culture in Florida is that the space program changed the education system, increased tourism, and created technology to help people.

Florida's culture and economy were significantly impacted by the space program. The impact on education was one of the most significant ways. Many young people were motivated to pursue STEM (science, technology, engineering, and mathematics) careers by the space program. This prompted the development of institutions and educational programs devoted to these fields, aiding in Florida's development of a highly skilled labor force.

The space program also increased tourism in Florida because people from all over the world traveled to Florida to see space launches and to visit the Kennedy Space Center. This increased employment opportunities and state revenue.

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Answer:

Water has a chemical formula of H2O . In here, there are two hydrogen atoms and one oxygen atom, and so its mass will be 2+16=18 amu . There are two water molecules formed, and that means the total mass of the products is 18⋅2=36 amu .

Answer:

0.189 g

Explanation:

Step 1: Write the balanced equation

NCl₃ + 3 H₂O ⇒ NH₃ + 3 HCIO

Step 2: Calculate the moles corresponding to 1.33 g of NCl₃

The molar mass of NCl₃ is 120.36 g/mol.

1.33 g × 1 mol/120.36 g = 0.0111 mol

Step 3: Calculate the moles of NH₃ produced from 0.0111 moles of NCl₃

The molar ratio of NCl₃ to NH₃ is 1:1. The moles of NH₃ produced are 1/1 × 0.0111 mol = 0.0111 mol.

Step 4: Calculate the mass corresponding to 0.0111 moles of NH₃

The molar mass of NH₃ is 17.03 g/mol.

0.0111 mol × 17.03 g/mol = 0.189 g

Exothermic refers to chemical interactions that aerobic respiration. Combustion reactions release higher energy. Endothermic refers to atoms and molecules that either use or absorb reactive power.

A chemical process known as an endothermic releases energy as heat or light. It is an endothermic reaction's opposite. Chemical equation expressed as reactants + products + energy. An reaction mechanism is one in which electricity is given off as light or warmth.

A response is deemed to be exothermic if it produces heat while also undergoing a net decrease in basic enthalpy change. Samples include those type of combustion, iron rust, including water froze. Exothermic processes are those that discharge heat and energy into the surroundings.

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It is expected at 1.05 atm the solubility increases if compared to the solubility at 0.222 atm.

In general, an increase in pressure leads to an increase in solubility. In the same way, a decrease in pressure will decrease solubility.

Considering the pressure increased, the most likely result is for the solubility to proportinally increase.

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If the temperature is raised while maintaining a constant pressure of 100 atm, CO2 will transition from a solid to a liquid, then from a liquid to a supercritical fluid, and lastly to a gas. This is the fourth of four targets.

Heat energy will logically go from a warmer (body with a high temp) to the a cooler (body with a low temp) according to temperature (one at a lower temperature). How cold or hot something is can be expressed numerically using the physiological concept of temperature. A thermometer is used to determine temperature. Thermometers were calibrated using various temperature scales that historically specified unique reference points & thermometric materials.

It is measured in joules. Heat will therefore serve as a gauge for the flow or movement of energy. You must be aware of the fact that an object will receive or lose heat but not have heat if you want to comprehend the distinction between heat and temperature. It can therefore be referred to as a measure of change. The concepts of temperature and heat are very dissimilar. a thermometer with Farenheit and Celsius scales. The average molecular kinetic energy of a substance is measured by its temperature. The temperature of something is a statement about how quickly the molecules are moving within that object.

Target 1 of 4 is the phase shifts that happen when CO2 is heated from 190 K to 350 K at a constant pressure of 1 atm. It is known as sublimation when CO2 changes its phase at 1 atm from a solid (dry ice) to a gas (carbon dioxide vapor) without going through the liquid phase.

CO2 will experience a separate set of phase shifts when subjected to pressures greater than 1 atm. CO2 will change its state from a solid to a liquid at 5.1 atm constant pressure, and then from a liquid to a gas when the temperature rises. This is the second of four targets.

When the temperature is raised, CO2 will transition from a solid to a liquid at a constant pressure of 10 atm, and then from a liquid to a supercritical fluid. This is the third of four targets.

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Answer:

Sulfur dioxide (SO2)

⇒ Why is this the best option?

To determine the polarity of the molecule, there are two requirements. The first one has a variety of terminal atoms, whereas the second has a lone pair on the center atoms. The molecule is polar if one of the requirements is met; else, it is nonpolar. The oxygen atom is a terminal atom because it surrounds the sulfur atom, which is the center element in the SO2 molecule's Lewis structure. In this molecule, there are two terminal oxygen atoms. If we look at the first criterion, we can see that it is not met because it calls for the presence of two separate terminal atoms.

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Answer:

molecular weight of C12H22O11 or grams This compound is also known as Lactose or Sucrose or Maltose. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles C12H22O11, or 342.29648 grams.

Explanation:

A rainbow is produced through a proces that includes refraction, reflection, and dispersion of  sunlight.

A rainbow is formed when sulinght is refracted and reflected by rain drops in the atmospher.

The sunlight is split into its component colors, which is why rainbows appear as having an array of colors. This is due to each color being bent by a different amount during refraction.

The colors of a rainbow are always in the same order, with red on the outside and violet on the inside.

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Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.

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Answer:

combustion

Explanation: