Complete the reactions below for the extraction of elemental potassium and rubidium. + KCl(l) reversiblearrow + K(g) Ca(s) + 2 reversiblearrow 2 +CaCl_2(s) Select the type of reaction that is represented above. O Addition O Double displacement O Reduction O Decomposition

The direction of heat transfer between two samples of carbon depends on their temperature difference, and not solely on their average kinetic energy. While the average kinetic energy of a substance is related to its temperature, it is not the determining factor for the direction of heat transfer.

When two samples of carbon come into contact, a heat transfer will occur between sample A and sample B. The direction of heat transfer is dependent on the temperature difference between the samples. Heat transfer always flows from a hotter object to a cooler object, so if sample A is hotter than sample B, heat will flow from A to B. If sample B is hotter than sample A, heat will flow from B to A.
The average kinetic energy of the molecules in a substance is related to its temperature. The higher the average kinetic energy, the higher the temperature of the substance. However, the average kinetic energy does not determine the direction of heat transfer.
It is possible for a substance with a lower average kinetic energy (and therefore a lower temperature) to transfer heat to a substance with a higher average kinetic energy (and therefore a higher temperature). This can occur if the substance with the lower temperature has a greater heat capacity, which means it can absorb more heat without a significant increase in temperature.

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The time to plate out 10.0 g of zinc using a current of 5.0 A is 98.35 minutes.

The reduction reaction in the electrolysis reaction of zinc

Zn²⁺ + 2e → Zn.

Based on stoichiometry, the number of moles is proportional to the number of reacting atoms or ions.

Number of moles for Zn
n = m ÷ Mr

n = 10.0 ÷ 65.4 = 0.153 mol

Number of moles for electrons
n Zn : n e = 1 : 2
n e = 2 × n Zn
n e = 2 × 0.153 = 0.306 mol

The equation for the number of moles of an electron from Faraday's law
n e = It ÷ 96,485

It = n e × 96,485

5.0 × t = 0.306 × 96,485

t = 29,506.12 ÷ 5

t = 5,901.22 s

t = 5,901.22 ÷ 60 minutes

t = 98.35 minutes

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Answer:

66 grams of ice would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C.

Explanation:

To calculate the amount of ice that would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C, we need to use the formula:

Q = m_water * c_water * ΔT_water + m_ice * Lf

where,
Q = the amount of heat transferred,
m_water = the mass of water, c_water is the specific heat capacity of water,
ΔT_water = the change in temperature of water, m_ice = the mass of ice,
Lf = the specific latent heat of fusion of ice.

First, let's calculate the amount of heat transferred to the water:

Q = m_water * c_water * ΔT_water
Q = 352 g * 1.0 cal/(g*°C) * (15-0) °C
Q = 5,280 cal

Next, we can use the specific latent heat of fusion of ice, which is 80 cal/g, to calculate the amount of heat required to melt the ice:

Q = m_ice * Lf
Q = m_ice * 80 cal/g
m_ice = Q / Lf
m_ice = 5,280 cal / 80 cal/g
m_ice = 66 g

The angles as shown are supplementary angles because the add up to 180 degrees.

Two angles are said to be supplementary if they add up to 180 degrees. Now we know that the sum of angles on  straight line is 180 degrees. If we look at the image as shown in the image attached, we can see that the angles lie on a straight line.

As such, we can conclude that the angles as shown are supplementary angles because the add up to 180 degrees.

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Answer:

3 years

Explanation:

(50*0.3)x>=100

Answer:

87469.73J

Explanation:

72.25g/0.826kJ/g=87.4697337kJ

The expression for the pressure of an ideal gas by means of kinetic theory is P = J / V.

According to the kinetic theory, a gas is made up of numerous submicroscopic particles (atoms or molecules), all of which are moving randomly and continuously. The container's walls and the quickly moving particles constantly collide in this situation.

It should be noted that based on the information, the formula illustrated will be:

f² = u²+ v² + w²

p = mv

where P = momentum

m = mass

v = velocity

Time = Distance / Speed

Force = mass × velocity² / distance

Pressure = force / area

J = mn

P = J/V

where

J = total mass

V = total volume

p = density of gas.

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Electron configuration refers to the distribution of electrons in atoms and molecules.

In conclusion, electron configuration refers to the distribution of electrons in atoms and molecules.

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Answer:

In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.

The given alkyne is Option A 3-heptyne

The hydrocarbon having at least one C-C triple bond is called an Alkyne.

It has the general formula of   \(\rm C_n H_{2n+2}\) .

In the question it is being mentioned that it is an alkyne so there will be a triple bond and not a double bond.

It has been asked in the question that

CH3CH₂C ≡  CCH₂CH₂CH3 is which alkyne from the given option.

The counting of the Carbon chain is done from the left side and the Triple bond is at the 3rd Carbon , so 3-heptyne .

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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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Answer

The type of bond that exists in a water molecule is a covalent bond

Step-by-step explanation:

The chosen molecule is water

A covalent bond involves the sharing of electrons between two constituent elements

Looking at the molecular formula of water (H20)

Water = 2 atoms of hydrogen and 1 atom of oxygen

The diagram above shows that there is a sharing of electrons between the hydrogen atom and oxygen atom. The oxygen atom needs two electrons to complete its octet configuration.

Hence, the bond that exist in water molecule is a covalent bond

Answer:

if were talking about berylium then the answer should be 2 because it wants to move 2 spaces back (losing electrons) to become a nobel gas so the answer is 2+

Explanation:

it has 2 valence electrons YW :)    

A nucleus with 4 protons has a positive charge of +2.

Protons may be defined as the type of sub-atomic particles that are present in the nucleus of an atom along with the neutrons. These sub-atomic particles possess a positive charge in nature. It may be thought that protons are discovered by Ernest Rutherford.

Beryllium has a nucleus with 4 protons, which means that it has an atomic number of 4. This element belongs to the alkaline earth metals in group 2. Beryllium has the capability to lose two electrons in order to attain a noble gas configuration and occupy stability. It has an electronic configuration \(1s^2, 2s^2\). So, in order to make it octet fulfilled, it loses two electrons and becomes positively charged.

Therefore, a nucleus with 4 protons has a positive charge of +2.

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Answer:

The solubility of alkaline earth metal hydroxides in water increases down the group because the size of the metal cation increases as you move down the group. This increase in size results in a decrease in the cation's charge density, which makes it less able to attract and hold onto hydroxide ions. As a result, the hydroxides become more soluble in water as you move down the group. Additionally, the lattice energies of the hydroxides decrease down the group, making it easier to break apart the crystal lattice structure and dissolve the hydroxides in water.

Answer:

See explanation

Explanation:

The average speed of the molecules of a gas depends on the temperature of the gas and its molar mass and not on the volume of the gas.

The average velocity of a gas is given by; vrms=√3RTM

R= gas constant

T= Absolute temperature

M= molar mass of the gas

Where the temperature of the gas is held constant, the average velocity of gas molecules depends on the molar mass of the gas. Hence, if a sample of gas is slowly compressed to one-half of its original volume with no change in temperature, the average speed of the molecules in the sample of gas remains the same.

Answer:Temperature

Explanation:

Q_w = 307.3 J

C_m = .233 J/g•K

%error = 39.95%

For simplicity's sake, I'm relabeling

Q_w as Q1

m_w as m1

C_w as c1

T_eq as T2

T_w as T1

Q_m as Q2

m_m as m2

C_m as c2

experimental value as exp

actual value as actual

Question 1

Q1 = m1•c1•(T2-T1)

Identify what you know

m1 = 124g

c1 = 4.13 J/g • K

T2 = Final temperature = 22.3°C

T1 = Initial temperature = 21.7°C

Convert Celsius to Kelvin (C+273.15=K)

T2 = 295.45 K

T1 = 294.85 K

Plug in

Q1 = 124g•(4.13 J/g•K)•(295.45K - 294.85K)

Solve

Q1 ≈ 307.3 J

Question 2

-Q1 = Q2 = m2•(c2)•(T2-100)

Ignore Q2 for a second, and you're left with

-Q1 = m2•(c2)•(T2-100)

which is the same thing.

Identify what you know

Q1 = 307.3 J

m2 = 17g

T2 = 22.3°C

Plug in

-(307.3J) = 17g • c2 • (22.3°C-100°C)

Solve

-307.3 J = (-1320.9 g•°C) • c2

c2 = .233 J/g•°C or J/g•K (I'll explain later)

Question 3

%err = ((exp - actual)/actual) • 100%

Identify what you know

exp = .233 J/g•K

actual = .388 J/g•K

Plug in

%err = ((.233 J/g•K - .388 J/g•K)/ .388 J/g•K) • 100%

Solve

%err = -39.95 %

Take the absolute value

%err = 39.95%

Referring to earlier change in units:

The reason we can not use the K value of T2 (295.45K) is because the formula provided (T2-100) does not account for T2 being in K. It only accounts for T2 being in °C.

Answer:

The correct answer is option c, that is, being neither precise nor accurate.

Explanation:

Obtaining the experimental values that come almost close to the true value is termed as accuracy. On the other hand, precision is obtaining experimental values continuously, which may come either far away or near to the true value.  

Based on the given information, it is clear that 0.554 grams, that is, the third value obtained from the experiment is showing some closeness to the true value, which is 0.567 grams. While, neither any of the other values are close or is coming near to the true value. This shows that the measurements are an illustration of being neither precise nor accurate.  

Answer:

geosphere

Explanation:

geo means rocks this is the area

hope this helps dude

Answer:

Ksp = 8.8x10⁻⁵

Explanation:

Full question is:

After mixing an excess PbCl2 with a fixed amount of water, it is found that the equilibrium concentration of Pb2+ is 2.8 × 10–2 M. What is Ksp for PbCl2?

When an excess of PbCl₂ is added to water, Pb²⁺ and Cl⁻ ions are produced following Ksp equilibrium:

PbCl₂(s) ⇄ Pb²⁺ + 2Cl⁻

Ksp = [Pb²⁺] [Cl⁻]²

If an excess of PbCl₂ was added, an amount of Pb²⁺ is produced (X) and twice Pb²⁺ is produced as Cl⁻ (2X):

Ksp = [X] [2X]²

Ksp = 4X³

As X is the amount of Pb²⁺ = 2.8x10⁻²M:

Ksp = 4(2.8x10⁻²)³

Answer: choice: I & Choice E

Explanation:

Answer:

C and G

Explanation:

Answer:

First, we need to determine the molar mass of HCl.

The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.

Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:

6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles

Finally, we can use the molar mass to convert moles to grams:

10 moles x 36.45 g/mol = 364.5 grams

Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.

we have to transform the mass of the reactants into mols to do that we have to divide the mass of each component by its molar mass. (molar mass of MnO2= 89.6g/mol; molar mass of HCl= 36.4 g/mol)

To find the limiting reactant we chose one of the reactants, MnO2 in this case, and calculate how many mols of the other reactant (HCl) would be consumed for that amount of MnO2

The standard enthalpy change of the reaction is -1093.66 kJ/mol.

The standard enthalpy change of the reaction is determined from the sum of the enthalpy changes of the intermediate steps that give the overall reaction.

The equation of the reaction is given below as follows:

2 C₄H₁₀ + 13 O₂ ----> 8 CO₂ + 10 H₂O

The enthalpy changes of the intermediate reactions are as follows:

1. 4 C + 5 H₂ ---> C₄H₁₀    ;ΔH₁ = -124.73 kJ/mol

2. C + O₂ ---> CO₂    ;ΔH₂ = -393.50 kJ/mol

3. 2 H₂ + O₂ --->  2 H₂O   ;ΔH₃ = -483.64 kJ/mol

The enthalpy change of the reaction, ΔH = 2 * ΔH₁ + (-4 * ΔH₂) + 5 * ΔH₃

ΔH = {2 * -124.73 + (-4 * -393.50) + 5 * -483.64}kJ/mol

ΔH = -1093.66 kJ/mol

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Answer:

\(m=397.6gC_8H_{18}}\)

Explanation:

Hello there!

In this case, according to the given chemical reaction, we can set up the heat of reaction per mole of gasoline as shown below:

\(\Delta H=\frac{-10,990kJ}{2molC_8H_{18}}=-5495\frac{kJ}{molC_8H_{18}}\)

Now, since the total heat is obtained by multiplying the moles and heat of reaction, we can calculate the moles as shown below:

\(n=\frac{Q}{-\Delta H } \\\\n=\frac{19,126kJ}{-(-5495\frac{kJ}{molC_8H_{18}} )} \\\\n=3.48molC_8H_{18}}\)

Finally, since the molar mass of gasoline is 114.22 g/mol, we can easily calculate the mass as follows:

\(m=3.48molC_8H_{18}} *\frac{114.22gC_8H_{18} }{1molmolC_8H_{18}} } \\\\m=397.6gC_8H_{18}}\)

Best regards!

Answer:

1.E25 it is the answer the answer to mass of 1×10^25 molecules of water​

Explanation:

this is just EXPLINATION find your answer using this

first divide the number of molecules by Avogadro's number 6.022*10^25

you will

l get no. of Moles of water

multiply the no. of Moles with mass of 1 Mole of water 18g per mole

if get answer you comment

you should try on your own you will understand better

The units are quantities of some physical magnitude that are standardized, this helps us so that the measurements of the properties can be replicated by any person in the world.

Each culture has developed a system of units for this purpose, so the units are based on different concepts that serve different scales, although conversions can be made between the two.

In this case we have two units that help us measure pressure. The relationship between these two units can be found in a conversion table, and in this case 1atm is equal to 760mmHg.

Answer: 1 atm=760 mmHg. First option

Answer:

It will take 19.9 hours to fill the cubic.

Explanation:

First, we can find the volume of the cubic.

\(V_{c}=18.7^{3}ft^{3}=6539.2 ft^{3}=1.85*10^{8} ml\)

Let's multiple this volume times the density

\(V_{c}*\rho=1.85*10^{8} ml * 1.49 g/ml = 2.76*10^{8} g\)

If we divide the spilling rate by V times density we will have:

\(t=\frac{V_{c}}{\rho R}=2.76*10^{5} kg/3.85kg/s=71688.3 s = 19.9 h\)

Therefore, it will take 19.9 hours to fill the cubic.

I hope it helps you!            

The study of chemicals and bonds is called chemistry. when the amount reactant and the product is equal is said to be equilibrium.

The correct answer is 19.9h.

The formula used to solve the question is as follows:-

\(D= \frac{M}{V}\)

The data is given as follows:-

The density of the is as follows:-

\(V*D =1.85*10^8 *1.49 =2.76*10^8\)

Hence, the time will be as follows:-

\(t=\frac{V_c}{Dr}\\ \\=\frac{2.76*10^5}{3.85} \\ = 71688.3s\\=19.9h\)

Hence, the correct time is 19.9h.

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Answer:

Rate constants are temperature dependent.

Explanation:

Reaction rate is used to quantify the rate of chemical reaction. There is a relationship between the reaction rate and the half-life of the reaction and the Gibbs free energy of activation, and the reaction rate is temperature dependent according to the equation.

For a reaction shown below

a A + b B ⇒ c C

The rate of reaction of the reaction is given by

\(r = k(T) [A]^{m}[B]^{n}\)

where k(T) is the reaction constant, which is seen to be dependent on the temperature of the reaction.

Also, k(T) is numerically equal to

\(k(T) = Ae^{\frac{E_{a} }{RT} }\)

where

r = reaction rate

A = pre exponential factor

\(E_{a}\) = Activation energy

R = gas constant

T = temperature

and m and n are experimentally determined partial orders in [A] and [B]

If there is sufficient fossil fuel, we will cope by utilizing it in a responsible and sustainable manner while actively transitioning towards alternative energy sources. Coping with the abundance of fossil fuels requires a multi-faceted approach that considers environmental, economic, and social aspects.

To cope effectively, we can:

1. Promote energy efficiency: Invest in technologies and practices that minimize energy waste and maximize efficiency in all sectors, including transportation, industries, and buildings.

2. Transition to renewable energy: Increase the adoption of renewable energy sources such as solar, wind, hydro, and geothermal power. This reduces our reliance on fossil fuels and mitigates environmental impacts.

3. Implement policy measures: Enact policies that incentivize the use of renewable energy, discourage excessive fossil fuel consumption, and promote sustainable practices.

4. Invest in research and development: Support and fund research efforts aimed at developing cleaner and more sustainable energy technologies, such as advanced battery storage, hydrogen fuel cells, and carbon capture and storage.

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