How does the constitution delegate powers to the nation differently.

The rate constant at 366 K is 4.2 × 10^1 s−1.

The rate constant at 366 K can be determined using the Arrhenius equation. The Arrhenius equation is a mathematical equation that relates the rate of a chemical reaction to temperature, activation energy, and the pre-exponential factor. It is given by the equation:k = A*e^(-Ea/RT)

where:k is the rate constant

A is the pre-exponential facto

REa is the activation energy

T is the temperature in kelvins

R is the gas constant

We are given the activation energy, Ea = 108 kJ/mol

The rate constant, k1 = 4.6 × 10−6 s−1 at T1 = 275 K

The rate constant, k2 = ? at T2 = 366 K

We need to solve for A before we can determine k2 using the Arrhenius equation. We can do that by rearranging the equation to solve for A:

A = k*e^(Ea/RT)

A = k1*e^(Ea/RT1)

A = 4.6 × 10−6 s−1 * e^(108 kJ/mol/ (8.314 J/mol K * 275 K))A = 2.56 × 10^11 s−1

The pre-exponential factor A is 2.56 × 10^11 s−1

Now we can determine the rate constant at 366 K:k2 = A * e^(−Ea/RT2)k2 = 2.56 × 10^11 s−1 * e^(−(108 kJ/mol) / (8.314 J/mol K * 366 K))k2 = 4.2 × 10^1 s−1

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Answer:

6. KCIO4 -> KCI + 2O2

7.  Ni(OH)2 + H2SO4 → NiSO4 + 2H2O        

8.  4Ga(Cn)3 + 3Sn(BrO3)4 → 3Sn(Cn4) + 4Ga(BrO3)3

9.  3Ca(NO3)2 + 2Fe → 2Fe(NO3)3 + 3Ca              

Explanation:

Balancing a chemical equation involves the following steps:

It is important to balance chemical equations because the law of conservation of mass states that the total mass of the reactants must equal the total mass of the products in a chemical reaction. Balancing chemical equations helps ensure that this law is satisfied.

The favored geometrical arrangements for ABn molecules : for which the A atom has pairs of electrons in its valence shell is 2 is linear, 3 is the trigonal, 4 is the tetrahedral, 5 is the trigonal bipyramidal 6 is the octahedral.

Atoms will combine together and form the molecules and this arrangement is the associated with the atoms in the three-dimensional structure and is more precisely known as the molecular geometry. The Bond length, the bond angle, and the torsion angle will helps in determining  the position of the atom.

The favored geometrical arrangements for the ABn molecules for which the A atom has the valence electrons are :

Valence electrons                              geometrical arrangements

        2                                                      linear

        3                                                      trigonal

        4                                                       tetrahedral

        5                                                    trigonal bipyramidal

        6                                                     octahedral

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The positive effect of using chemistry is the generation of energy without fossil fuels.

Chemistry is the branch of science that deals with the study of the nature, properties and composition of matter as well as the changes that matter undergoes. Chemistry has really contributed positively to the advancement of the society.

Lately, there has been a lot of emphasis on alternative sources of energy apart from fossil fuels. One such options is the use of hydrogen fuels. Chemistry has been at the forefront of this research.

Hence, one positive effect of using chemistry is that energy can be generated without burning fossil fuels.

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Answer:

its D.

Explanation:

Answer:

c

Explanation:

because electricity has a good conduct tha is mental

When (S.S)-1,2-dimethylcyclopropane is subjected to monochlorination, four types of products are formed. So, the answer to this question is:

Four types of monochlorination products, including stereoisomers, are formed from (S.S)-1,2-dimethylcyclopropane.

Stereoisomers

Stereoisomers are the molecules that have the same molecular formula and sequence of bonded atoms but differ in the arrangement of their atoms in space. The isomerism that arises due to the different spatial arrangements of atoms or groups in the molecule is called stereoisomerism.

Monochlorination of Cyclopropane

Cyclopropane reacts with halogens in the presence of UV radiation to give halogenated products. The chlorination of cyclopropane gives rise to three monochlorination products. The two chlorine atoms can add to the same carbon or to two different carbons. The reaction leads to ring opening to give alkene intermediates.

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The wavelength, measured in nanometers (nm), of a photon released during the hydrogen atom's transition from the n = 5 state to the n = 2 state is λ = 433.9367 n m

Given,

\($\lambda=\frac{h c}{E_p}\)

Ep is the energy of photon.

Since, \($E_p=\frac{2 \pi^2 m_e K^2 Z^2 e^4}{h^2}\left(\frac{1}{n_2^2}-\frac{1}{n_5^2}\right)$\)

\($& K=\frac{1}{4 \pi \varepsilon_0}, n_2=2, n_5=5, Z=1 \\\)

\($& \lambda=\frac{800 \cdot h^3 \cdot c \cdot \varepsilon_0^2}{21 \cdot m_e \cdot e^4}\)

Putting in the values of physical constants

\($\lambda=433.9367 n m\)

Here, λ wavelength of photon

h = Planck's constant

me mass of electron

c =  speed of light in vacuum

e =  elementary charge

Z =  Atomic No. [1 for hydrogen]

The complete question is:

What is the wavelength, in nm, of a photon emitted during a transition from the n = 5 state to the n = 2 state in the hydrogen atom ?

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Answer:

1.3atm = 988 mm Hg

200.02 kPa = 1.97404392 atm

760mm Hg = 101.325 kPa

20 mm Hg = 0.0263158 atm

360 mm Hg = 47.9961 kPa

Explination:

I hope this helps.

Answer:

There are more hours of daylight at Location X than at Location Y.

Explanation:

The student has created a model in the diagram in which sun and earth are presented. There are two point location on earth one is x and other is y. The x point is declined towards the sun which means that locations on point x receives more light than location Y. There will be more hours of daylight at Location x.

The best comparison of the conditions at Location X and Location Y is there are more hours of daylight at Location X than at Location Y.

The sun is the big spherical of heat and energy. The sun gives light. The Earth is the third planet of our solar system.

Thus, the correct option is C, There are more hours of daylight at Location X than at Location Y.

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The characteristics and the type of molecular bond they describe:

1. Bonds found in Halite (between Na⁺ and Cl⁻): Ionic bond

2. Bonds found between Si and O in the Si-O tetrahedron: Covalent bond

3. Bonds inside the water molecule (between the H and O): Covalent bond

4. Bonds that exist between two water molecules: Hydrogen bond

5. Strongest bond type: Covalent bond

6. Weakest bond type: Van der Waals bond

7. Bonds that are used by water to dissolve salt: Ionic bond

The ionic bond is a type of molecular bond found in halite (between Na⁺ and Cl⁻). The Si-O tetrahedron is held together by a covalent bond. The bond inside the water molecule (between the H and O) is also a covalent bond. The hydrogen bond is the type of bond that exists between two water molecules. The covalent bond is the strongest bond type, while the van der Waals bond is the weakest bond type. Water uses the ionic bond to dissolve the salt.

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Answer:

working with intense pressure and heat

Explanation: you would you have to work with intense pressure and heat in order to fuse two hydrogen nuclei together to create helium isotopes.  

Answer:

The main problem is achieving ignition to start the reactions. Fusion reactions can occur only at extremely high temperatures.

Explanation:

The number of grams of iron present in 14.79 cm length of the same iron rod is 640.51 g.

Ounces is a unit of mass which is used to define a very little amount of anything.

In the question, given that:

In one inch of iron rod whose weighs is 3.88 ounces = 2.54 cm long

In 1 g = 0.035273 ounces present

So we can calcuylate the number of grams in which 3.88 ounces present as:
x = (3.88 ounces) / (0.035273 ounces/g)

x = 110g

So, in 110g = 3.88 ounces present

And in 2.54 cm = 110g of iron present

In 14.79 cm, present grams of iron can be calculated as:

y = (14.79cm x 110g) / 2.54cm

y = 640.51 g

Hence option (c) is correct i.e. 640.51 g.

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The weight of the iron rod with 14.79 cm length with same density is given by: Option C; 640.51 g

Suppose that a finite amount of substance is there having its properties as:

Then, they are related as:

\(d = \dfrac{m}{v}\)

We know that:

Now, from the facts given in the problem, we have:

The weight of first iron rod which is one inches long = 3.88 ounces

The new rod is 14.79 cm long. And 1 cm = 0.3937 inches approx, thus the new rod is: \(14.79 \times 0.3937 \approx 5.8228 \: \rm inches\)

As for 1 inch long rod, there is  weight of 3.88 ounces, thus:

for 5.8228 inch rod, the weight of the rod would be \(5.8228 \times 3.88 \approx 22.5924 \: \rm ounces\)

And since 1 ounce = 28.3495 g approx

Thus, weight of the new rod in grams would be \(22.5924\times 28.3495 \approx 640.485 \approx 640.51\: \rm g\)

Thus, the weight of the iron rod with 14.79 cm length with same density is given by: Option C; 640.51 g

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I LOVE balancing chemical equations!

Answer:

2 Zn + 2 HCl -> 2 ZnCl + 1 H₂

Explanation:

These coefficients correct balance this equation.

Please add me as Brainliest, I need it to move onto the next level.

Mass in grams of each quantity of vitamin D = 1384.92 g which is needed for forming and maintaining healthy bones.

no of moles = given weight/ molar mass

no of molecules = no of moles of component*avagado number

avogado number= 6.02 * 10^23

3.6 moles = mass /384.7 g mol^-1

mass = 1384.9 g

Lack of vitamin D can result in bone discomfort from osteomalacia in adults and bone deformities like rickets in children. Vitamin D deficiency can also cause a decrease of bone density, which can increase the risk of osteoporosis and fractures (broken bones). Other illnesses can also be brought on by severe vitamin D deficiency. It may lead to rickets in kids. The rare condition rickets makes bones brittle and susceptible to fracture.

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Answer:

Ionic Compound

Explanation:

1) NaBr

2) CaCl2

3) MgS

4) AlO

5) Li3P

6) Cs3N

7) KI

8) BaF2

9) RbNO2

10) BaO

11) Potassium oxide

12) Magnesium iodide

13) Aluminum chloride

14) Calcium bromide

15) Sodium nitride

16) Lithium fluoride

17) Barium phosphide

18) Dicesium sulfide

19) Strontium fluoride

20) Sodium chloride

Hope this helps!!

Answer:

uhh its gallon

Explanation:

In peptide synthesis, one amino acid can be coupled to another utilizing DCC (Dicyclohexylcarbodiimide) as a coupling agent, the action mechanism are reacts with the carboxyl group, cts as a nucleophile, and DCU byproduct is removed.

DCC aids in the formation of an amide bond between the carboxyl group of one amino acid and the amino group of the second amino acid. The reaction mechanism involves three main steps. First, DCC reacts with the carboxyl group of the first amino acid, forming a highly reactive O-acylisourea intermediate and releasing a molecule of dicyclohexylurea (DCU). The formation of this intermediate activates the carboxyl group, making it more susceptible to nucleophilic attack by the amino group of the second amino acid.

Next, the amino group of the second amino acid acts as a nucleophile and attacks the activated carboxyl group of the first amino acid, this leads to the formation of a new amide bond between the two amino acids, creating a dipeptide molecule. Finally, the DCU byproduct is removed from the reaction, leaving the desired dipeptide product. Overall, the DCC coupling method provides an efficient and selective approach to peptide synthesis, allowing for the formation of amide bonds between amino acids and enabling the construction of longer peptide chains.

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Answer:

2.5 moles of Al

Explanation:

We'll begin by calculating the number of mole in 127 g of Al₂O₃. This can be obtained as follow:

Mass of Al₂O₃ = 127 g

Molar mass of Al₂O₃ = 101.961 g/mol

Mole of Al₂O₃ =?

Mole = mass / molar mass

Mole of Al₂O₃ = 127 / 101.961

Mole of Al₂O₃ = 1.25 mole

Finally, we shall determine the number of mole of Al that reacted. This can be obtained as follow:

4Al + 3O₂ —> 2Al₂O₃

From the balanced equation above,

4 moles of Al reacted to produce 2 moles of Al₂O₃.

Therefore, Xmol of Al will react to produce 1.25 moles of Al₂O₃ i.e

Xmol of Al = (1.25 × 4)/2

Xmol of Al = 2.5 moles.

Thus, 2.5 moles of Al is needed for the reaction.

Answer:

compound is CuO.

Explanation:

rxn:

CuO + 2HCl = CuCl2 (Blue green color) + H2O

Answer:

I believe it is one. I attached what I think is the balanced equation of the problem you gave. The answer is d.1

Explanation:

CH4+4O=CO2+2H2O

Answer:

they make tissue. form organ and whole body an i true..

The highlighted "2" in this portion of a chemical reaction is the coefficient of the molecule, indicating the number of molecules present in the reaction.

The coefficient is used to balance chemical reactions and ensure that the number of atoms of each element remains constant before and after the reaction.

A chemical reaction is a process that results in the transformation of one set of chemical substances into another. It involves the rearrangement of atoms and the formation and breaking of chemical bonds. Chemical reactions can be represented using chemical equations, which indicate the reactants (the starting substances) on the left side and the products (the resulting substances) on the right side, separated by an arrow.

The rate of a chemical reaction depends on several factors, including the concentration of the reactants, the presence of a catalyst, and the temperature. Understanding chemical reactions is important in many areas of chemistry, including the design of new materials, the development of new energy sources, and the understanding of biological processes.

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Answer:

Mass and charge is conserved

Explanation:

According to the law of conservation of mass, matter is neither created or destroyed. With the exception of nuclear reactions where mass is converted to energy thereby leading to an apparent loss in mass, this law applies to chemical reactions.

A redox reaction is a type of chemical reaction which involves a transfer of electrons. In a redox reaction, the mass of reactant particles is conserved. Also, as electrons are transferred between atoms, one donates and the other accepts. The charge of atoms depends on this gain or loss of electrons. A gain of electrons reduced the charge of an atom whereas a loss of electrons increases the charge. This two processes occur concurrently, therefore, charge is also conserved.

The value of k is approximately -0.1287. The correct answer is option a. -0.1287

To determine the value of k in the radioactive decay formula A = \(le^kt\), we can use the given information:

A = final amount = 25 grams

I = initial amount = 70 grams

t = time = 8 years

We can substitute these values into the formula and solve for k:

A = \(Ie^kt\)

25 = \(70e^k(8)\)

Dividing both sides of the equation by 70:

\(e^k(8)\)= 25/70

Taking the natural logarithm (ln) of both sides to isolate k:

ln\((e^k(8))\) = ln(25/70)

k(8) = ln(25/70)

Dividing both sides by 8:

k = (1/8) × ln(25/70)

Using a calculator to evaluate this expression, we find:

k ≈ -0.1287

Therefore, the value of k is approximately -0.1287.

The correct answer is: a. -0.1287

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Answer:

The mass of a sample of iron that has had 300 J applied to it and heats up from 20 degrees Celsius to 40 degrees Celsius is 32.61 grams.

Explanation:

Calorimetry is the measurement and calculation of the measurement of heat changes exchanged by a body or a system produced in physical and chemical processes.

The sensible heat of a body is the amount of heat received or transferred by a body to produce a change in temperature but without a change in physical state.

The sensible heat in a constant pressure is calculated by:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c, and where ΔT is the temperature variation (ΔT=Tfinal - Tinitial)

In this case:

Replacing:

300 J= 0.46 \(\frac{J}{g*C}\) * m* (40 - 20) C

Solving:

300 J= 0.46 \(\frac{J}{g*C}\) * m* 20 C

\(m=\frac{300 J}{0.46 \frac{J}{g*C} * 20 C}\)

m= 32.61 g

The solubility in moles/liter for aluminum hydroxide at 25 degrees Celcius is  2.47×109 M

What is solubility?

The maximum amount of a substance that can be dissolved in a given volume of a solvent at a particular temperature is referred to as the substance's solubility. The solubility of a given solute-solvent combination is a quality that is unique to that combination; yet, the solubility of individual compounds can vary substantially.

Given that,

Temperature= 25 degrees Celcius

Ksp value= 1.0 X 10^-33

Al(OH)3(s) ==> Al3+(aq) + 3OH-(aq)

Ksp = [Al3+][OH-]3

Let x = [Al3+], then [OH-] = 3x

1.3x10-33 = (x)(3x)3

1.3x10-33 = 27x4

x4 = 4.8x10-35

x = 2.5X10-9 M = molar solubility of Al(OH)3

Hence, the answer rounded off to one decimal point since in decimal part .466 digits in 2nd and 3rd place (66) and greater than 50. the previous digit is converted to the next digit (4-5) Even if you want to give the answer up to two decimal points then the digit in 3rd place (6) is greater than (5) so the digit in 2nd decimal place converts to (67) the answer will be 2.47×109.

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The density of the metal beads is 12.47 g/mL (option c).

1. Determine the mass of the metal beads:

  Mass of beaker + metal beads = 205.5 g

  Mass of empty beaker = 82.0 g

  Mass of metal beads = (Mass of beaker + metal beads) - (Mass of empty beaker)

                    = 205.5 g - 82.0 g

                    = 123.5 g

2. Determine the volume of water displaced by the metal beads:

  Initial volume of water in the graduated cylinder = 60.9 mL

  Final volume of water in the graduated cylinder = 70.8 mL

  Volume of water displaced = Final volume - Initial volume

                           = 70.8 mL - 60.9 mL

                           = 9.9 mL

3. Calculate the density of the metal beads:

  Density = Mass / Volume

  Density = 123.5 g / 9.9 mL

  Density = 12.47 g/mL

Therefore, the density of the metal beads is 12.47 g/mL (option c).

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