MnO4 - is a stronger oxidizing agent than ReO4 - . Both ions have charge-transfer (LMCT) bands; however, the charge-transfer band for ReO4 - is in the ultraviolet, whereas the corresponding band for MnO4 - is responsible for its intensely purple color. Are the relative positions of the charge-transfer absorptions consistent with the oxidizing abilities of these ions? Explain

d.2.93m.CaCl2 is present in the solution with a 2.93m concentration.

The boiling point of a solution is directly related to its concentration. The boiling point elevation of a solution, ΔTb, is equal to the product of the van't Hoff factor (i) and the molality of the solution (m).The quantity of moles of solute per kilogramme of solvent is known as molality.

Therefore, we can solve for the molality of the solution using the following equation:

ΔTb

\(= i *m\\105.3\°C= i * m\\\)

\(m =\frac{ 105.3 \°C }{i}\)

Assuming an ideal van't Hoff factor for CaCl2 (i = 2), the molality of the solution is:

\(m =\frac{ 105.3 \°C }{ 2}\\m = 52.65 m = 52.65 mol/kg\)

The concentration of CaCl2 in the solution is then:

\(C = m * Kb\\C = 52.65 mol/kg * 0.512 \°C/m\\C = 2.93 mol/kg\)

Therefore,The concentration of CaCl2 in the solution is  2.93m.

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complete question:The boiling point at 1.00 atm of an aqueous solution of CaCl2 is 105.3 °C. What is the concentration of CaCl2 in the solution? Kb (H2O) = 0.512 °C/m. Assume an ideal van't Hoff factor for CaCl2.

a.3.45m

b.4.40m

c.8.79m

d.2.93m

Answer:

car 2/red

Explanation:

give me crown

Answer:

P2 = 1125 mmHg

Explanation:

Gas Pressure Calculation

To solve this problem, we need to use the combined gas law, which relates the pressure, volume, and temperature of a gas under different conditions. The combined gas law is given by:

(P1V1)/T1 = (P2V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature of the gas, and P2, V2, and T2 are the final pressure, volume, and temperature.

Let's start by calculating the initial conditions:

P1 = 750 mmHg

V1 = 120 cm^3

T1 = 25°C + 273.15 = 298.15 K (temperature in Kelvin)

Now we can plug in these values and solve for P2:

(P1V1)/T1 = (P2V2)/T2

(750 mmHg x 120 cm^3) / 298.15 K = (P2 x 150 cm^3) / (40°C + 273.15)

Simplifying this equation, we get:

P2 = (750 mmHg x 120 cm^3 x (40°C + 273.15)) / (298.15 K x 150 cm^3)

P2 = 1125 mmHg

Therefore, the pressure of the gas would increase to 1125 mmHg if its volume increased to 150 cm^3 at 40°C.

ChatGPT

Answer:

A heating curve graphically represents the phase transitions that a substance undergoes as heat is added to it. The plateaus on the curve mark the phase changes.The second change of phase is boiling, as the temperature stays the same during the transition to gas.

Explanation:

The mass (in grams) of sodium carbonate, Na₂CO₃ required to produce 85 grams of barium carbonate, BaCO₃ is 45.7 grams

First, we shall observe the balanced equation to obtain useful information. This is shown below:

Na₂CO₃ + BaSO₄ -> BaCO₃ + Na₂SO₄

From the balanced equation above,

197 g of BaCO₃ were obtained from 106 g of Na₂CO₃

With the above information, we can obtain the mass of sodium carbonate, Na₂CO₃ required to produce 85 grams of barium carbonate, BaCO₃. This is illustrated below:

From the balanced equation above,

197 g of BaCO₃ were obtained from 106 g of Na₂CO₃

Therefore,

85 g of BaCO₃ will be obtain from = (85 × 106) / 197 = 45.7 g of Na₂CO₃

Thus, we can conclude from the above calculation that the mass of sodium carbonate, Na₂CO₃ required is 45.7 grams

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Answer:

they are expected to have the same particles because their masses are the same with there molar mass

Answer:

The mixture is not in equilibrium, the reaction will shift to the left.

Explanation:

Based on the equilibrium:

Fe³⁺+ HSCN ⇄ FeSCN²⁺ + H⁺

kc = 30 = [FeSCN²⁺] [H⁺] / [Fe³⁺] [HSCN]

Where [] are concentrations at equilibrium. The reaction is in equilibrium when  the ratio of concentrations = kc

Q is the same expression than kc but with [] that are not in equilibrium

Replacing:

Q = [10.0M] [1.0M] / [0.1M] [0.1M]

Q = 1000

As Q > kc, the reaction will shift to the left in order to produce Fe³⁺ and HSCN untill Q = Kc

Answer:

Here is the correct order (ascending order):

gene, DNA, chromosome, nucleus, cell, organism.

A gene is a segment of DNA that contains the instructions for building a protein or RNA molecule. DNA is the molecule that carries genetic information and makes up genes. A chromosome is a structure made of DNA and protein that carries genes. A nucleus is a membrane-bound organelle that contains chromosomes. A cell is the smallest structural and functional unit of living organisms, consisting of a nucleus (or nucleoid in prokaryotes) and cytoplasm. An organism is an individual living entity, such as a plant, animal, or bacterium, that consists of multiple cells.

Answer:

Ok:

Explanation:

a) 2-fluoropropane

b) 2,3 dichlorobutane

c) pent-2-ene or 2 pentene (I assume the semicolon was a typo)

d) Same as c (I assume Z is a typo too)

e) non-1-ene or 1-nonene (I assume the B is a 2)

Answer:

2/ Protons and neutrons are found in the nucleus.

Explanation:

Answer:

increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object would make the oppositely charged objects attract each other more.

Hello, this is Bing. I can help you with your question. Based on the information I found on the web, **H2** can be broken down into its two atoms of hydrogen (H) by supplying enough energy to overcome the bond that holds them together⁴. This process is called **dissociation** and requires an energy equal to or greater than the **dissociation energy** of H2, which is about 436 kJ/mol⁴.

One way to break down H2 is by using **electricity** to split water (H2O) into hydrogen (H2) and oxygen (O2) through a process called **electrolysis**¹. In this process, water is decomposed into its elements by passing an electric current through it. The electric current is provided by a battery or another source of electricity and the water needs to have an **electrolyte**, such as salt or acid, added to it to make it conductive¹. Two electrodes, usually made of metal or other conductive material, are inserted into the water and connected to the battery. The electrode connected to the positive terminal of the battery is called the **anode** and the one connected to the negative terminal is called the **cathode**¹. When the electric current flows through the water, hydrogen gas bubbles form at the cathode and oxygen gas bubbles form at the anode¹. The overall chemical reaction for electrolysis of water is:

2 H2O → 2 H2 + O2

Another way to break down H2 is by using **heat** to cause a reaction between hydrogen and oxygen that produces water and releases a large amount of energy. This reaction is called **combustion** or **oxidation** and can be ignited by a spark or a flame³. The reaction is very fast and explosive and can be dangerous if not controlled. The overall chemical reaction for combustion of hydrogen is:

2 H2 + O2 → 2 H2O

I hope this helps you understand how H2 can be broken down and what methods are used to do so.

The volume of the ethanol that has a density of ethanol is 0.789 g/cm³ is 209.13cm³.

The volume of a substance can be calculated by dividing the mass of the substance by its density as follows:

Volume = mass ÷ density

According to this question, the density of ethanol is 0.789 g/cm³. A flask holds 165.0 g of ethanol and the volume can be calculated as follows:

Volume = 165.0g ÷ 0.789g/cm³

Volume = 209.13cm³

Therefore, the volume of the ethanol that has a density of ethanol is 0.789 g/cm³ is 209.13cm³.

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Answer:

d = 1.91 g/cm³

d = 1.91 g/mL

Explanation:

Given data:

Mass of cheese = 67 g

Volume of cheese = 35 cm³

Density of cheese = ?

Solution:

Formula:

d = m/v

by putting values,

d = 67 g/ 35 cm³

d = 1.91 g/cm³

1cm³ = 1mL

d = 1.91 g/mL

Answer: c

Explanation:

Chemical element, please if you now the answers of my two last questions help me

Chemical elements are pure substances that cannot be broken down into simpler substances by chemical means

WHAT IS A PURE SUBSTANCE:

Therefore, chemical elements are pure substances that cannot be broken down into simpler substances by chemical means.

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The temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

To determine the temperature of the gas in Kelvin after its volume is reduced, we can use the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature for a given amount of gas.

The combined gas law equation is:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, T₁ is the initial temperature in Kelvin, and T₂ is the final temperature in Kelvin.

Given that the initial volume V₁ is 3,480 mL, the initial temperature T₁ is -70.0 °C (which needs to be converted to Kelvin), and the final volume V₂ is 2,450 mL, we can substitute these values into the equation.

To convert -70.0 °C to Kelvin, we add 273.15 to it, resulting in T₁ = 203.15 K.

Now we can solve for T₂:

(T₂ * V₁) / T₁ = V₂

T₂ = (V₂ * T₁) / V₁ = (2,450 mL * 203.15 K) / 3,480 mL

Simplifying the equation, we find:

T₂ ≈ 143.27 K

Therefore, the temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

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we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer: 1. 1 : 2  2. NaOH is the limiting reactant

Explanation: Hope this helps you

Answer:

2. Ratio 1CuSO4 : 2NaOH

Explanation:

CuSO4 + 2NaOH ⟶ Cu(OH)2 + Na2SO4

so 1 mole of CuSO4 will react with 2 moles of NaOH

therefore the ratio is 1:2

Hope this helps

The current passing through the electrolytic cell is approximately 2.02 x 10^4 Amperes.

To calculate the current in amperes, we need to use Faraday's laws of electrolysis and the stoichiometry of the reaction.

Faraday's laws state that the amount of substance produced or consumed during electrolysis is directly proportional to the quantity of electricity passed through the cell. The relationship is given by:

Q = nF

Where Q is the electric charge in coulombs (C), n is the number of moles of substance involved in the reaction, and F is Faraday's constant, which is equal to 96,485 C/mol.

In this case, the substance being produced is Cl2, and we know the mass of Cl2 produced, which is 4.8 x 10^5 g.

First, we need to calculate the number of moles of Cl2 produced:

Molar mass of Cl2 = 35.45 g/mol

Moles of Cl2 = mass / molar mass = (4.8 x 10^5 g) / (35.45 g/mol) ≈ 1.354 x 10^4 mol

Now we can calculate the quantity of electricity passed through the cell using Faraday's laws:

Q = nF

Q = (\(1.354 x 10^4\)mol) * (96,485 C/mol)

Q ≈ 1.308 x 10^9 C

The quantity of electricity is given in coulombs. To find the current, we need to divide this value by the time in seconds.

Given that the time is 18 hours, we convert it to seconds:

Time = 18 hours * 60 minutes/hour * 60 seconds/minute

Time = 6.48 x 10^4 seconds

Finally, we can calculate the current:

Current (I) = Q / Time

I = (1.308 x 10^9 C) / (6.48 x 10^4 s)

I ≈ 2.02 x 10^4 Amperes

Therefore, the current passing through the electrolytic cell is approximately 2.02 x 10^4 Amperes.

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The change of the bar's length is ΔL =0. 000312 m if the temperature is raised to 12.2 ∘C∘C above room temperature.

Given that

At  room temperature ( T = 25 ∘C)  ,L= 1 m

L=1+2.4 X 10-5T

So the length at  13.0 ∘C above room temperature:

L=1+2.4 X 10-5T

L=1+2.4 X 10-5x13

L=1.000312 m

So the change in length

ΔL = 1.000312 - 1.0000 m

ΔL =0. 000312  m

Since the length of the aluminum bar, L is given by , L = 1.0000 + 2.4 × 10⁻⁵T and T = 14.1°C, we substitute the value of T into L. So, we have L = 1.0000 + 2.4 × 10⁻⁵ × 14.1°C = 1.0000 + 0.0003384 = 1.0003384 m. The change in length is thus 1.0003384 - 1.0000 = 0.0003384 m ≅ 0.00034 m.

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The final temperature of the mixture given that 25 g of water at 25 °C is mixed with 25 g of water at 65 °C, is 45 °C

The final temperature of the mixture can be obtained by calculating the equilibrium temperature of the mixture. This is shown below:

Heat loss by warm water = Heat gain by cold water

MᵥᵥC(Tᵥᵥ - Tₑ) = MC(Tₑ - T)

Cancel out C

Mᵥᵥ(Tᵥᵥ - Tₑ) = M(Tₑ - T)

25× (65 - Tₑ) = 25 × (Tₑ - 25)

Cancel out 25

65 - Tₑ = Tₑ - 25

Collect like terms

65 + 25 = Tₑ + Tₑ

90 = 2Tₑ

Divide both side by 2

Tₑ = 90 / 2

Tₑ = 45 °C

Thus, we can conclude that the final temperature the mixture is 45 °C

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Weight is best defined as the force of gravity on an object (option C).

Weight is the force on an object due to the gravitational attraction between it and the Earth (or whatever astronomical object it is primarily influenced by).

Weight is different from mass being that weight is a dependent on the gravitational force of the object's habitation, however, mass is not.

For example, the mass of an object on Earth can be 10kg, however, the weight of the object is 100N because the gravitational force of the Earth is 10m/s².

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The ratio of neutrons to protons, or the N/Z ratio, plays a crucial role in determining a nucleus' stability. The range of N/Z ratios in which nuclei are stable is generally referred to as the belt of stability.

If the forces between the constituents of the nucleus are equal, an atom is stable. If these forces are out of balance or if the nucleus has an excessive amount of internal energy, an atom is unstable (radioactive).

Z = 104 for Rutherfordium, element 104. The isotopes 261Rf and 262Rf, having masses of 261 and 262, respectively, have the longest half-lives. Accordingly, N/Z ratios are:

261Rf: N/Z = (261-104)/157 = 1.08

262Rf: N/Z = (262-104)/158 = 1.09

These N/Z ratios are a little bit higher than the average belt of stability values, which are about 1.0 for heavy nuclei. These isotopes are thought to be reasonably stable because they are close enough.

Z = 109 for Meitnerium, element 109. The isotopes 278Mt and 282Mt, with masses of 278 and 282, respectively, have the longest half-lives. Accordingly, N/Z ratios are:

278Mt: N/Z

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Answer:

B.

Explanation:

Sunshine is Radiant energy.

Answer:

The ans. is B.radiation

Answer:

V₁ = 808.9mL

Explanation:

Based on Charles's law, the volume of a sample of gas is directely proportional to its absolute temperature. The formula is:

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

Where V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.

The initial state is:

V₁ = Our incognite

T₁ = 79°C + 273.15 = 352.15K

Final state is:

V₂ = 990.4mL

T₂ = 158°C + 273.15 = 431.15K

Replacing:

\(\frac{V_1}{352.15K} =\frac{990.4mL}{431.15K}\)

Considering the Charles's Law,  the volume at 79 °C is 808.86 mL.

Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure.

This law says that for a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement they have the gas molecules.

In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

\(\frac{V}{T}=k\)

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

\(\frac{V1}{T1}=\frac{V2}{T2}\)

In this case, you know:

Replacing in Charles's law:

\(\frac{V1}{352 K}=\frac{990.4 mL}{431 K}\)

Solving:

\(V1=\frac{990.4 mL}{431 K}x352 K\)

V1=808.86 mL

Finally, the volume at 79 °C is 808.86 mL.

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