a complex of nickel, [nicl2(pph3)2], is paramagnetic, while the palladium analogue, [pdcl2(pph3)2], is diamagnetic. predict how many isomers will exist for each compound. explain your reasoning.

Answer:

Using cobalt glass could be helpful to identify elements that weakly emit blue and/or violet.

Explanation:

Answer:

Electromagnetic force

Explanation:

The attraction forces that causes the compression of the atom leading the to decrease in Atomic Radius is "Electromagnetic force".

Electrons (negatively charged) are strongly bonded with the nucleus (positive nucleus) by electromagnetic force. Electromagnetic force allows the electrosn to move in a specific orbit around the nucleus.

Atomic radius decreases from left to right in a periodic table because when valence electrosn are added at the same time the number of protons in nucleus increases. This increases the nuclear charge that attracts the electrons more strongly towards the nucleus and decreases the atomic radius.

Hence, the correct answer is "electromagnetic force".

When the reactants have less enthalpy than the products, then heat energy is given out. That is option A.

An exothermic reaction is a type of reaction in which the energy level of the reactants are higher than that of the product.

It is this discrepancy in the energy levels of both the reactants and products would lead to the generation and release of energy into the surrounding environment.

The enthalpy of exothermic reaction is gotten by the difference between the energy needed to break the bonds of reactants and the energy needed for the formation of products.

Therefore,when the reactants have less enthalpy than the products, then heat energy is given out.

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Answer:

A

Explanation:

potassium because it has valance electrons by giving out proteins

All of the following are involved in eukaryotic transcription EXCEPT a rho factor. The correct answer is 2.

Eukaryotic transcription is the process by which genetic information in DNA is transcribed into RNA. This process is carried out by a large complex of proteins and enzymes, including general transcription factors, transcription activators, and a transcription initiation complex.

These proteins and enzymes work together to unwind the DNA double helix, recruit the RNA polymerase enzyme to the promoter region of the gene, and begin the process of synthesizing RNA. The rho factor is not typically involved in this process, as it is specific to prokaryotic cells and is involved in the termination of transcription.

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\(\\ \sf{:}\longrightarrow 2,4-diethyl-2-methylpentane\)

The molar concentration of ammonia is 2.976M.

Molarity of HCl = number of moles/ volume

Number of moles = Molarity of Hcl * volume

Hence the number of moles of ammonia =\(14.88 * 10^{-3}\)

From question volume of ammonia =\(5 * 10^{-3}\)

Molarity = \(14.88 * 10^{-3}/5 * 10^{-3}\)

Molarity  \(=2.976\)

What is meant by molar concentration?

Molar concentration is the most effective way of describing a solute concentration in a solution. Molarity is described as the total number of moles of solute dissolved per liter of solution,i.e., M = mol/L.

How do you calculate the molar concentration?

To calculate the Molar Concentration, we will find the molar concentration by dividing the moles by the liters of water used in the solution.

Thus, the molar concentration of ammonia is 2.976M

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The chemical species predominantly present in solution that will determine the pH is water (H2O).

When you add Ba(OH)2 to HCl, a neutralization reaction occurs which forms water and a salt (BaCl2). The equation for this reaction is: Ba(OH)2 + 2HCl → BaCl2 + 2H2O

Since water is the main product of the reaction, it will be the chemical species predominantly present in the solution. The pH of water is 7, which means that the solution will be neutral. Therefore, the formula of the chemical species predominantly present in solution that will determine the pH is H2O.

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Answer:

1.9 x 10^-20 Joules

Explanation:

I'll assume the frequency is 2.9 x 10^13 Hz  [5-1 was meant to be s^-1].

The energy of a photon is given by the releationship:

 E = hf, where E is energy, h is Planck's constant, and f is frequency, in 1/s or Hz.

Planck's constant = 6.62607E-34 J*s

E = hf

E = (6.626 x 10^-34 J*s)*(2.9 x 10^13 s^-1)

E = 1.9 x 10^-20 Joules

The equilibrium constant can be used to predict the extent of a reaction, i.e. the degree of the disappearance of the reactants

n Li = m Li / Mr Li

n Li = 20 / 7

n Li = 2.86 mol

n H2SO4 = m H2SO4 / Mr H2SO4

n H2SO4 = 98 / 98

n H2SO4 = 1 mol

H2SO4 is the limiting reactant

n H2 = (coef. H2 / coef. H2SO4) • n H2SO4

n H2 = (1/1) • 1

n H2 = 1 mol

m H2 = n H2 • Mr H2

m H2 = 1 • 2

m H2 = 2 gr

To determine how many 2.5 L balloons can be filled, we need to compare the initial and final conditions and use the ideal gas law equation, PV = nRT, where:

P is the pressure,

V is the volume,

n is the number of moles of gas,

R is the ideal gas constant (0.0821 L·atm/(mol·K)),

and T is the temperature in Kelvin.

First, let's convert the given values to the appropriate units:

Initial pressure (P1) = 150 atm

Initial volume (V1) = 20.0 L

Initial temperature (T1) = 67°F = (67 - 32) / 1.8 + 273.15 K

Final volume (V2) = 2.5 L

Final temperature (T2) = 45°C = 45 + 273.15 K

Atmospheric pressure (P2) = 14 psia = 14 / 14.7 atm (conversion factor)

Using the ideal gas law equation, we can calculate the number of moles of helium in the initial state (n1) and the final state (n2) as follows:

n1 = (P1 * V1) / (R * T1)

n2 = (P2 * V2) / (R * T2)

Next, we can calculate the difference in the number of moles (Δn) between the initial and final states:

Δn = n1 - n2

Finally, to determine the number of 2.5 L balloons that can be filled, we need to divide the final volume by the volume of each balloon:

Number of balloons = V2 / 2.5

Substituting the given values and performing the calculations will provide the number of 2.5 L balloons that can be filled under the specified conditions.

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It will take approximately 86.44 years for the radioactive isotope to decay from 80 grams to 2.5 grams, assuming the decay follows a simple exponential decay model.

The decay of a radioactive isotope can be modeled using the formula:

N = N0 * (1/2\()^(t/t1/2)\)

where N is the amount of the isotope at a given time t, N0 is the initial amount, t1/2 is the half-life of the isotope, and t is the elapsed time.

In this case, we are given N0 = 80 grams, t1/2 = 20 years, and we want to find the value of t when N = 2.5 grams. Therefore, we can set up the following equation:

2.5 = 80 * (1/2)\(^(t/20)\)

Dividing both sides by 80, we get:

(1/2\()^(t/20)\) = 2.5/80

Taking the logarithm of both sides with base 1/2, we get:

t/20 = log(2.5/80) / log(1/2)

Simplifying this expression, we get:

t/20 = 4.3219

Multiplying both sides by 20, we get:

t = 86.44 years

Therefore, it will take approximately 86.44 years for the radioactive isotope to decay from 80 grams to 2.5 grams, assuming the decay follows a simple exponential decay model.

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Answer:

1.35g

Explanation:

times the density and volume together to get the mass

0.9 x 1.5 = 1.35g

Answer:the xylem transports water and nutrients throughout the plant

the pholem transports food throughout the plant.

Explanation:mark brainliest cuz like i gave u the answer lol

Answer:

xylem and pholum

Explanation:i did it on edge hope its right :)

also sorry if i spelled it wrong i have never been the best at grammar

Answer:

Atomic radius is directly proportional to Metallic reactivity in group 2.

Explanation:

Atomic radius is directly proportional to Metallic reactivity in group 2.

As we move down the group in group 2 which is called as the alkaline earth metals, the atomic number increases due to which the subshell increases. And the outermost shell's electron are less tightly held to the nucleus of the atom. Since the electrons are loosely held that means they can easily participate in reactions and that what makes it reactive down the 2nd group. Therefore alkaline earth metals with higher atomic number are more chemically reactive.

The equilibrium constant of the dissociation of potassium hydrogen tartrate (KHT) is equal to the square of the bitartrate concentration due to the dissociation of KHT into two hydrogen ions (H+) and bitartrate ions (HC₄H₄O₆⁻) as shown below:

KHT ⇌ H+ + HC₄H₄O₆⁻

Here, the equilibrium constant expression for the dissociation reaction of KHT can be written as follows:

Kc = [H+] [HC₄H₄O₆⁻]/ [KHT]

As we know, KHT dissociates into two moles of bitartrate ion (HC₄H₄O₆⁻) and one mole of hydrogen ion (H+). So, after the dissociation of KHT, the concentration of the bitartrate ion (HC₄H₄O₆⁻) will be double that of the hydrogen ion (H+).

Therefore, the concentration of hydrogen ion (H+) will be equal to the square root of the concentration of bitartrate ion (HC₄H₄O₆⁻).

Hence, Kc = [H+]²[HC₄H₄O₆⁻]/ [KHT] = [HC₄H₄O₆⁻]²/ [KHT]

This is the reason why the equilibrium constant of the dissociation of KHT is equal to the square of the bitartrate concentration.

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Among the given options, an arrangement where two chlorine atoms are adjacent to each other would not be a possible arrangement monomer in polyvinyl chloride (PVC).

Polyvinyl chloride (PVC) is a polymer made from the monomer vinyl chloride, which has the chemical formula CH2=CHCl. In the polymerization process, multiple vinyl chloride monomers combine to form a long chain polymer structure.

In PVC, the chlorine atom (Cl) in the monomer is attached to the carbon atom adjacent to the double bond. The carbon-carbon backbone of PVC consists of alternating carbon and chlorine atoms along the polymer chain. This alternating arrangement of carbon and chlorine atoms gives PVC its characteristic properties, including its strength, durability, and resistance to chemicals.

Since the chlorine atoms are attached to alternating carbon atoms, it is not possible for two chlorine atoms to be adjacent to each other in the PVC polymer chain. If such an arrangement were to occur, it would result in an unstable structure that is not characteristic of PVC. Therefore, an arrangement where two chlorine atoms are adjacent would not be a possible arrangement in PVC.

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Answer:

a: iron is a substance

Explanation:

because its hard and brittle and classified as a metal

Answer:

3

Explanation:

A coefficient (in terms of chemistry) is the number placed in front of the formula. Which in this case is 3

Answer:

they both include a question, procedure and conclusion.

Explanation:

In terms of energy efficiency, an electric lighter is more efficient than a butane lighter. However, as such the choice between a butane lighter and an electric lighter ultimately depends on the specific needs and circumstances of the user.

This is because an electric lighter does not require any fuel to operate, and instead uses electrical energy from a battery or the car's electrical system to generate a spark to light a fire.

On the other hand, a butane lighter requires fuel in the form of butane gas to operate, and some of the energy from the combustion of the butane is lost as heat and not used to produce a flame.

Additionally, butane lighters can release small amounts of unburned fuel into the air, contributing to air pollution.

However, it's worth noting that electric lighters may not be as practical for certain situations, such as camping or other outdoor activities where access to electrical power is limited. In such cases, a butane lighter may be a more suitable option.

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The major product of reaction between 1-butanol and Na2Cr2O7 is butanoic acid.

When a primary alcohol like 1-butanol (OH is bonded to a primary carbon) is begin to oxidize in the presence of strong oxidizing reagent such as sodium dichromate (Na2Cr2O7) and H2SO4, sulfuric acid, the stepwise oxidation take place as above firstly to the corresponding aldehyde which undergoes further oxidation to the corresponding carboxylic acid.

You can find that the formed aldehyde after first oxidation is butanal and the only organic product, due to the strong oxidizing reagent is butanoic acid.

Thus, the major product formed is butanoic acid.

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The concentration of nitrate ion in the final solution is 0.48 M.

An abundance of a constituent divided by the total volume of a mixture is known as concentration. There are various types of concentrations: Mass, molar, number, and volume. The quantity of a solute found in the given amount of solution is the concentration of the substance. Concentration is expressed in terms of molarity.

Molarity means the number of moles per litre. The unit symbol is mol / L or mol / dm³ in the SI unit.

To calculate the concentration of the solution,

                     \(C_{1}V_{1} + n C_{2}V_{2} = C * total volume\)       →   1

where,   \(C_{1}\)  =  concentration of the starting solution

              \(C_{2}\)  =  concentration of the desired solution

               \(V_{1}\)  =  volume of the starting solution

               \(V_{2}\)  =  volume of the desired solution

As per the question,

Substitute the values in 1,

⇒      \(C_{1}V_{1} + n C_{2}V_{2} = C * total volume\)

⇒      0.255 × 0.035 + 2 × 0.328 × 0.045  =  C × 0.08

⇒      0.008925 + 2 × 0.01476  =  C × 0.08

⇒      0.008925 + 0.02952  =  C × 0.08

⇒      C × 0.08  =  0.038445

⇒      C   =  0.038445 /  0.08

⇒      C   =  0.4805625

Therefore, 0.48 M is the concentration of the Nitrate ion in the final solution.

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its conduction

Hopeit helps)❤❤

Let me know if ther is an error in my answer

Answer:

1/....

Explanation:

If we say acceleration 'a' is inversely proportional to mass 'm', then

a=1/m.

Because a clinical thermometer cannot measure high temperatures, leaving it in the sun or near a flame will cause it to break. It will not melt because the temperature in sunlight or near a flame is not high enough to melt the glass.

Because a clinical thermometer cannot measure high temperatures, leaving it in the sun or near a flame will cause it to break. It will not melt because the temperature in sunlight or near a flame is not high enough to melt the glass.
The hot glass expands, making more room for the mercury inside, causing the mercury column to fall. The mercury then heats and expands, lengthening the mercury column in the thermometer. Mercury is not flammable. The agent does not burn, but when heated, it can produce corrosive and/or toxic fumes. Fire emits irritant, corrosive, and/or toxic gases. Use an extinguishing agent appropriate for the type of fire in the vicinity.

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Green main bonding jumper screws that are furnished with residential type panels should be installed in the service panel enclosure.

The main bonding jumper is a conductor that connects the noncurrent-carrying metal parts of the electrical system to the grounding electrode system. This connection helps to ensure that the electrical system is properly grounded and that any stray current will be safely directed to the ground.

The main bonding jumper should be installed in the service panel enclosure because this is the central point of the electrical system. All of the noncurrent-carrying metal parts of the electrical system, such as the service panel enclosure, the service entrance cable, and the branch circuit conductors, are connected to the service panel enclosure.

By connecting the main bonding jumper to the service panel enclosure, all of these noncurrent-carrying metal parts are also connected to the grounding electrode system.

The main bonding jumper should be a solid copper conductor with a minimum cross-sectional area of 6 AWG. It should be installed in a way that allows for easy access for inspection and maintenance.

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