Using MO theory, explain the difference between a conducting metal, a semiconductor, and an insulator. Drawing MO diagrams may help

The area = 313.612 cm²

Force (F) can cause objects to move

While pressure (P)is the force per unit area

\(\tt P=\dfrac{F}{A}\)

weight=force=105 pounds(lb)⇒english units

pressure = 2.16 lb/in²

Thea are (A)

\(\tt A=\dfrac{F}{P}=\dfrac{105}{2.16}=48.61~in^2\\\\1~in^2=6,4516~cm^2\\\\48.61~in^2=313,612~cm^2\)

Valence electrons affects ion formation by transferring from one atom to another atom.

Valence electrons are the outermost electrons in an atom and are involved in the formation of ions. Ions are atoms or molecules that have a net electric charge due to a surplus or deficiency of electrons. When an atom forms an ion, it either gains or loses electrons to achieve a more stable electron configuration. The number of valence electrons in an atom determines how easily it can gain or lose electrons to form ions. Atoms with few valence electrons, such as alkali metals, tend to lose those electrons easily to form positive ions. Atoms with many valence electrons, such as halogens, tend to gain electrons easily to form negative ions. The number of valence electrons also affects the charge of the ions that are formed. Atoms with fewer valence electrons will form ions with a higher charge, while atoms with more valence electrons will form ions with a lower charge.

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Answer:

Explanation:

Now, you know that this solution has a molarity of 6.00 M, which basically means that every liter, which is the equivalent of 1000 mL, will contain 6.00 moles of ammonia. Since we've picked a sample of 1000 mL, you can say that it will contain 6.00 moles of ammonia. To convert this to grams, use the compound's molar mass

Answer:

39

Explanation:

cux it is

Answer: 23.3 °C

Explanation: The one above is wrong

To determine the molar concentration of each ion present in the solutions, we need to calculate the total moles of each ion and divide it by the total volume of the resulting solution.

(a) Mixture: 54.1 mL of 0.33 M NaCl and 76.0 mL of 1.33 M NaCl

For NaCl, the number of moles (n) can be calculated using the formula:

n = M * V

n(NaCl) = 0.33 M * 54.1 mL + 1.33 M * 76.0 mL

Next, we need to determine the concentration of each ion. Since NaCl dissociates into Na+ and Cl- ions in solution, the molar concentration of each ion is the same as that of NaCl.

M(Na+) = M(Cl-) = n(NaCl) / (V1 + V2)

Where V1 and V2 are the volumes of the solutions used.

M(Na+) = M(Cl-) = n(NaCl) / (54.1 mL + 76.0 mL)

(b) Mixture: 134 mL of 0.66 M HCl and 134 mL of 0.17 M HCl

Similarly, we calculate the moles of HCl:

n(HCl) = 0.66 M * 134 mL + 0.17 M * 134 mL

The concentration of each ion is the same as that of HCl:

M(H+) = M(Cl-) = n(HCl) / (V1 + V2)

Where V1 and V2 are the volumes of the solutions used.

M(H+) = M(Cl-) = n(HCl) / (134 mL + 134 mL)

(c) Mixture: 36.3 mL of 0.340 M Ba(NO3)2 and 25.5 mL of 0.211 M AgNO3

For Ba(NO3)2, we calculate the moles:

n(Ba(NO3)2) = 0.340 M * 36.3 mL

For AgNO3, we calculate the moles:

n(AgNO3) = 0.211 M * 25.5 mL

The concentration of each ion is determined as follows:

M(Ba2+) = n(Ba(NO3)2) / (V1 + V2)

M(Ag+) = n(AgNO3) / (V1 + V2)

M(NO3-) = 2 * M(Ba2+) + M(Ag+)

Where V1 and V2 are the volumes of the solutions used.

M(Ba2+) = n(Ba(NO3)2) / (36.3 mL + 25.5 mL)

M(Ag+) = n(AgNO3) / (36.3 mL + 25.5 mL)

M(NO3-) = 2 * M(Ba2+) + M(Ag+)

(d) Mixture: 13.6 mL of 0.650 M NaCl and 22.0 mL of 0.131 M Ca(C2H3O2)2

For NaCl, we calculate the moles:

n(NaCl) = 0.650 M * 13.6 mL

For Ca(C2H3O2)2, we calculate the moles:

n(Ca(C2H3O2)2) = 0.131 M * 22.0 mL

The concentration of each ion is determined as follows:

M(Na+) = n(NaCl) / (V1 + V2)

M(Cl-) = n(NaCl)

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No, the subscripts in a chemical formula cannot be changed when balancing a chemical equation.

The subscripts in a chemical formula represent the ratio of atoms or ions in a compound and are determined by the chemical composition of the substance. Changing the subscripts would alter the identity of the compound and its chemical properties.

When balancing a chemical equation, the coefficients in front of the chemical formulas are adjusted to ensure that the number of atoms of each element is equal on both sides of the equation. Coefficients represent the relative number of molecules or formula units involved in the reaction.

The process of balancing a chemical equation involves applying the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. By adjusting the coefficients, the number of atoms of each element on the reactant side is made equal to the number of atoms on the product side.

It's important to note that while coefficients are changed to balance the equation, the subscripts remain the same. This is because the subscripts represent the specific arrangement and composition of atoms within a compound and cannot be altered without changing the substance being represented.

In summary, when balancing a chemical equation, the subscripts in the chemical formulas should not be changed. Only the coefficients are adjusted to ensure that the number of atoms of each element is balanced on both sides of the equation.

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Answer:

Copper = 2 Boron = 12 (copper and boron combined = 14)

Explanation:

the number after the element is the amount of atoms there is

The total volume of the solution is the 21.25 ml. The diluted Fe³⁺ concentration is 0.0097 M.

The volume of  the water  = 5.50 mL

The molarity of the solution = 0.030 M

The volume = 3 mL

The moles = molarity × volume

The moles = 0.030 × 0.003

The moles = 0.00009

The concentration of solution  = moles / volume

The concentration of solution  = 0.00009 / 0.00550

The concentration of solution  = 0.0163 M

The final volume = 21.25 mL

The diluted Fe³⁺ concentration = ( 0.0163 × 12.75 ) / 21.25

The diluted Fe³⁺ concentration = 0.0097 M

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Answer: The mass density is 1166.36 \(kg/m^{3}\).

Explanation:

Given: Weight of sample in air \((F_{air})\) = 500 N

Weight of sample in alcohol \((F_{alc})\) = 200 N

Specific gravity = 0.7 = \(0.7 \times 1000 = 700 kg/m^{3}\)

Formula used to calculate Buoyant force is as follows.

\(F_{B} = F_{air} - F_{alc}\\= 500 - 200 \\= 300 N\)

Hence, volume of the material is calculated as follows.

\(V = \frac{F_{B}}{\rho \times g}\)

where,

\(F_{B}\) = Buoyant force

\(\rho\) = specific gravity

g = acceleration due to gravity = 9.81

Substitute the values into above formula.

\(V = \frac{F_{B}}{\rho \times g}\\= \frac{300}{700 \times 9.81}\\= \frac{300}{6867}\\= 0.0437 m^{3}\)

Now, mass of the material is calculated as follows.

\(mass = \frac{F_{air}}{g}\\= \frac{500 N}{9.81}\\= 50.97 kg\)

Therefore, density of the material or mass density is as follows.

\(Density = \frac{mass}{volume}\\= \frac{50.97 kg}{0.0437 m^{3}}\\= 1166.36 kg/m^{3}\)

Thus, we can conclude that the mass density is 1166.36 \(kg/m^{3}\).

Answer:

A

Explanation:

A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site

Answer: 28

Explanation:a=d+a

Answer:

i will tell some examples of plasmas they are:

1.lightning

2.solar wind

3.welding arcs

4.stars(including the sun)

5.the earths's ionosphere

Answer: which of the following are examples of plasmas?

Choices: 1. Ice cubes 2. Tails of comets 3. A gas fire 4. The ionosphere 5. A neon sign 6. A flashlight

Explanation:

The Answer: is 2. Tails of comets 4. The ionosphere 5. A neon sign

Answer:

Know this

(i) 1mole of a substance contains 6.022 x 10^23atoms

(ii) 1mole of a substance contains 6.022x10^23molecules

Now

1.) 4.5x10²²atoms of Cu x 1mole of Cu/6.022x10²³atoms of Cu

=0.075moles of Cu.

2.) 8.5x10²⁴molecules of N2 x 1mole of N2/6.022x10²³molecules

=14.11moles of N2

3.) 0.025moles of CH4 x 6.022x10²³molecules/1mole of CH4

=1.51x10²²molecules of CH4

4.)1.26moles of Pb x 6.022x10²³atoms/1mole of Pb

=7.59x10²³atoms of Pb

5.) 0.56moles of CO2 x 6.022x10²³molecules/1mole

=3.37x10²³molecules.

That's pretty Much Everything

Answer:

D

Explanation:

there are 5 electrons in the outer shell of the first picture

According to electronic configuration, model 1 shows 5 electrons in the outer shell of the atom.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:

1500 km

Explanation:

its 600x2.5 devided by 1

The correct answer to the question, "In the Virtual ChemLab experiment called 'Names and Formulas of Ionic Compounds,' what color was each of the sulfide compounds?" is option c. black.

Sulfide compounds are a type of ionic compound that contains the element sulfur in its anionic form. These compounds are typically black in color, which is why option c is the correct answer.

It is important to note that different ionic compounds can have different colors, depending on the elements that they are composed of. For example, some ionic compounds may be yellow, white, or pink, as indicated by the other answer options. However, in the case of sulfide compounds, the correct answer is black.

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Combustible: Charcoal, straw, cardboard, paper, candle, wood.

Non-combustible: Chalk, stone, iron rod, copper coin, glass.

1H nuclei located near electronegative atoms tend to be de-shielded relative to 1H nuclei which are not.

Deshielding refers to the reduction in the electron density around a particular atom or group of atoms in a molecule or compound. It's a process that occurs when a group of atoms are exposed to a powerful electric or magnetic field. This results in a change in the chemical shifts of the nucleus. The nucleus shifts downfield, resulting in a signal that appears at a higher frequency. This process is also known as "decreasing shielding.

"Electronegativity is a measure of how much an atom attracts electrons to itself. A highly electronegative atom is one that is extremely effective at attracting electrons. The electronegative atom causes the electron density around the hydrogen atom to shift away, resulting in deshielding.

The more electronegative the atom, the more powerful the deshielding impact on the nearby 1H nuclei, which causes them to appear at a higher frequency. As a result, 1H nuclei located near electronegative atoms are de-shielded relative to 1H nuclei which are not.

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Answer:

lol good luck

Explanation:

u need it

Answer: Mg and O

Explanation: just took the test. Trust

The volume of the vessel occupied by the bed is 1570 mL. The volume of the solids in the vessel is 700 mL. The porosity of the bed is approximately 0.554. The minimum fluidizing velocity is approximately 0.139 m/s.

1. Calculate the volume of the vessel occupied by the bed:

The internal diameter of the vessel is 10 cm, so the radius (r) is 5 cm = 0.05 m.

The height of the bed is 20 cm = 0.2 m.

The volume of the vessel occupied by the bed is the volume of the cylinder with radius r and height 0.2 m.

V = π * r^2 * h = π * (0.05 m)^2 * 0.2 m = 0.00157 m³ = 1570 cm³.

Therefore, the volume of the vessel occupied by the bed is 1570 mL.

2. Calculate the volume of the solids in the vessel:

The mass of the solids is given as 1.96 kg.

The density of the solids is given as 2.8 g/cm³.

To find the volume of the solids, we can use the formula:

Volume = Mass / Density = 1960 g / (2.8 g/cm³) = 700 cm³.

Therefore, the volume of the solids in the vessel is 700 mL.

3. Calculate the porosity of the bed:

Porosity (ε) is defined as the ratio of the void volume to the total volume of the bed.

The void volume is the volume of the vessel occupied by the bed minus the volume of the solids.

Void volume = Volume of the vessel occupied by the bed - Volume of the solids = 1570 mL - 700 mL = 870 mL.

Total volume of the bed = Volume of the vessel occupied by the bed = 1570 mL.

Porosity (ε) = Void volume / Total volume of the bed = 870 mL / 1570 mL ≈ 0.554.

Therefore, the porosity of the bed is approximately 0.554.

4. Calculate the minimum fluidizing velocity:

The minimum fluidizing velocity can be determined using the Ergun equation, which is based on the Kozeny-Carman equation.

The Kozeny-Carman equation relates the pressure drop across a packed bed to the fluid velocity and the bed properties.

The Ergun equation is a modification of the Kozeny-Carman equation for fluidized beds.

The formula for the minimum fluidizing velocity (Umf) in a fluidized bed is given by:

Umf = [150 * (1 - ε)² * (ρ * g * dp) / (ε³ * μ)]^(1/3),

where ε is the porosity, ρ is the density of the fluid, g is the acceleration due to gravity, dp is the particle diameter, and μ is the viscosity of the fluid.

Given:

ε = 0.554,

ρ = 1000 kg/m³ = 1 kg/dm³,

g = 9.8 m/s²,

dp = 500 μm = 0.5 mm = 0.0005 m,

μ = 0.001 Pa·s.

Substituting these values into the formula:

Umf = [150 * (1 - 0.554)² * (1 kg/dm³ * 9.8 m/s² * 0.0005 m) / (0.554³ * 0.001 Pa·s)]^(1/3)

≈ 0.139 m/s.

Therefore, the minimum fluidizing velocity is approximately 0.139 m/s.

5. Determine if the use of the Kozeny-Carman equation is justified:

The use of the Kozeny-Carman equation is justified in this case because it is commonly used to estimate the pressure drop and fluid flow properties in packed beds, including fluidized beds.

6. Determine the likely type of fluidization:

The type of fluidization that is likely to occur depends on the fluid velocity relative to the minimum fluidizing velocity (Umf).

If the fluid velocity is below Umf, the bed will be in a fixed or settled state.

If the fluid velocity is slightly above Umf, the bed will be in a bubbling or incipient fluidization state.

If the fluid velocity is significantly above Umf, the bed will be in a fully fluidized state.

Since the given fluid velocity is not provided, it is not possible to determine the exact type of fluidization likely to occur based on the information provided.

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But, an irregular surface, for every bump, the light bounces down up down up down up.

I hope this helped! +*♡

The concentration of arsenic in milk, which is 3.57 μg/L, can be converted to ounces per gallon. The correct answer is option D) 3.84 x 10^4 oz/gal.

To convert the concentration of arsenic from micrograms per liter (μg/L) to ounces per gallon (oz/gal), we need to follow a series of conversion steps. First, we need to convert micrograms (μg) to grams (g). There are 1,000 micrograms in a milligram (mg) and 1,000 milligrams in a gram, so 3.57 μg is equivalent to 0.00357 mg. Next, we need to convert milliliters (mL) to gallons (gal). Since 1 liter (L) is equal to 1,000 milliliters (mL) and 1 gallon is approximately 3,785.41 milliliters, we can calculate that 946.4 mL is approximately 0.25 gallons. Now, we can calculate the concentration in ounces per gallon. One pound (lb) is equal to 16 ounces (oz), and we know that 1 lb is approximately 0.4536 kg. Since 1 gallon is equal to 4 quarts (qt), and 1 quart is equal to 32 ounces, we can multiply all the conversion factors together:

0.00357 mg/L * 0.25 gal * 16 oz/lb * (1 lb/0.4536 kg) = 3.84 x 10^4 oz/gal

Therefore, the concentration of arsenic in ounces per gallon is approximately 3.84 x 10^4 oz/gal, which corresponds to option D).

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The ratio of k at 310 K to k at 300 K for the reaction 2 NOCl --> 2 NO + Cl2 is approximately 1 (to the nearest whole number).

To solve this problem, we can use the Arrhenius equation:
k = Ae^(-Ea/RT)

where k is the rate constant, A is the pre-exponential factor (or frequency factor), Ea is the activation energy, R is the gas constant (8.314 J/mol K), and T is the temperature in Kelvin.

We are given the rate constant (k) and activation energy (Ea) for the reaction 2 NOCl --> 2 NO + Cl2 at 300 K. We want to find the ratio of k at 310 K to k at 300 K.

To find the value of A for the reaction at 300 K:

\(k = Ae^(-Ea/RT)2.6 x 10^-8 = A e^(-164000/(8.314*300))A = (2.6 x 10^-8) / e^(-164000/(8.314*300))A = 1.28 x 10^12\)

Now, we can use the Arrhenius equation again to find the rate constant (k) at 310 K:

\(k = Ae^(-Ea/RT)k(310) = (1.28 x 10^12) e^(-164000/(8.314*310))k(310) = 3.29 x 10^-8\)

Finally, we can find the ratio of k at 310 K to k at 300 K:

\(k(310) / k(300) = (3.29 x 10^-8) / (2.6 x 10^-8)k(310) / k(300) = 1.26\)

Therefore, the ratio of k at 310 K to k at 300 K is approximately 1 (to the nearest whole number).

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MgX₃ has the same configuration as shown 1s2 2s2 2p6 3s2 3p6. So  the correct option is D.

The branch of science which deals with chemicals and bonds is called chemistry.

The representation of electrons in their shell is called electronic configuration. To find the element we have to count the electrons in it.

The total number of electrons is 2+2+6+2+6 = 18 which is argon a noble gas element.

The valency of the magnesium is 3, Hence the compound they will make is MgAr₃

Hence the correct option is D that is MgX₃.

Your question is incomplete most probably your full question was

1s2 2s2 2p6 3s2 3p6 Atoms of an element, X, have the electronic configuration shown above. The compound most likely formed with magnesium, Mg, is..... (a) MgX (b) Mg2X (c) MgX2 (d) MgX3 (e) Mg3X2

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Answer:

The movement of the electron changes the amplitude of the wave. The farther the electron moves from the center position, the greater the amplitude.

Explanation:

Answer:

The movement of the electron changes the amplitude of the wave. The farther the electron moves from the center position, the greater the amplitude.

Explanation:

Edmentum Sample Answer.

Answer:

The answer is spontaneous.

Answer: The surroundings will lower in temperature.

Explanation:

Endothermic reactions draw heat from the surroundings in order to occur. So the surroundings will feel cold, as the heat is being used as energy in the reaction.

Answer:

Explanation:

Since the volume of the gas does not change, we can use the Gay-Lussac's law (also known as Pressure-Temperature law), which states that the pressure of an ideal gas is directly proportional to its absolute temperature when the volume is kept constant. Mathematically, this can be expressed as:

P1/T1 = P2/T2

where P1 and T1 are the initial pressure and temperature, respectively, and P2 and T2 are the final pressure and temperature, respectively.

Substituting the given values in the above equation, we get:

P2 = (P1/T1) × T2

   = (100 kPa/273 K) × 350 K

   = 128.83 kPa (approx.)

Therefore, the final pressure of the flask is approximately 128.83 kPa.

At a temperature of 68.07 K, a container with a volume of 972.9 ml containing 0.013 moles of CH₄ would have a pressure of 0.922 atm.

To find the temperature in Kelvin (K) at which 0.013 moles of CH₄ in a container with a volume of 972.9 ml have a pressure of 0.922 atm, we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure (in atm)

V = Volume (in liters)

n = Number of moles

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature (in Kelvin)

First, we need to convert the volume from milliliters to liters:

V = 972.9 ml * (1 L / 1000 ml) = 0.9729 L

Now we can rearrange the ideal gas law equation to solve for temperature:

T = PV / (nR)

T = (0.922 atm) * (0.9729 L) / (0.013 moles * 0.0821 L·atm/(mol·K))

T = 68.07 K

Therefore, at a temperature of 68.07 K, the given amount of CH₄ in the specified container would have a pressure of 0.922 atm.

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