2. Which of the following is not a characteristic of carbon that allows for the great variety of
organic compounds?

Carbon is able to form single, double, and triple bonds.
Carbon is able to form strong bonds with other carbon atoms.
Carbon possesses four valence electrons.
Carbon has a larger atomic radius than other Group 14 elements.
rhon ond

The compound X that have a Molecular molar mass of 138 g/mol is

Given here,

Compound x - 6g

malar mass of x - 138g/mol

Carbon dioxide - 13.39 g

water - 2.35g

So,

The moles of Water will be 0.13 mol

The moles of Hydrogen will be 0.26

Mass of hydrogen = 0.26 g

The moles of  CO2  will be 0.304

The moles of carbon will be 0.304

Mass of Carbon = 3.65 g

Mass of  Oxygen = Total mass of the compound - (mass of C + mass of H)

= 6.0 g - ( 3.65 + 0.262 ) g

= 2.09 g

Moles of oxygen = 0.131

Since Oxygen has the least moles, to find the molar ratio of the constituent atom, divide the moles of an atom from oxygen.

C = 0.304/0.131 = 2.8

C = 0.26/0.131 = 2

C = 0.131/0.131 = 1

convert 2.3 into a whole number

C = 2.3*3 = 7

H = 2*3 = 6

O = 1*3 = 3

Hence formula will be C7H6O3

What is molar mass?

The molar mass of a chemical compound is determined in chemistry by dividing the mass of a sample of that compound by the quantity of that compound, which is the number of moles in that sample, measured in moles. The molar mass of a substance is a bulk attribute rather than a molecular one. The compound's molar mass is an average over numerous samples, which frequently have different masses because of isotopes. A terrestrial average and a function of the relative abundance of the isotopes of the constituent atoms on Earth, the molar mass is most frequently calculated using the standard atomic weights. For converting between a substance's mass and amount in bulk amounts, the molar mass is the proper unit.

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Entropy is a measurable physical characteristic and a scientific notion that is frequently connected to a condition of disorder, unpredictability, or uncertainty.

Molar enthalpy is the amount of energy per mole. Enthalpy is a thermodynamic quantity that corresponds to a system's total heat content according to this definition. It is equivalent to the system's internal energy plus the sum of the pressure and volume products. This value's unit of measurement is KJ/mol.

Entropy is assumed to be 1 kB/particle

kB: Boltzmann Constant = 1.3806*10^(23)/JK

Entropy, S = 1.3806*10^(-23) /JK

We are aware that S = Q/T

provided T = 83.85 k

and that Q = S*T = S*83.85k = 1.157*10(-21) J / particle.

Since 1 mole = 6.022x1023 particles of heat energy,

the formula for an is 1.157*10(-21)*6.022*10^23, which is 6.967*102 J/mole.

Argon's molar enthalpy is Q/n,

where n is the number of moles,

and ΔH equals 0.6967 KJ/mole.

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The number of moles is 0.43 moles

The ideal gas law is a fundamental principle in physics and chemistry that describes the behavior of an ideal gas under certain conditions. It relates the pressure, volume, temperature, and the amount (in moles) of a gas in a closed system. The ideal gas law can be written as:

PV = nRT

where:

P = pressure of the gas (in Pascals)

V = volume of the gas (in cubic meters)

n = number of moles of the gas

R = gas constant (8.314 J/(mol·K))

T = absolute temperature of the gas (in Kelvin)

We know that;

PV = nRT

n = PV/RT

n = 1.7 * 7.2/0.082 * 346

n = 12.24/28.37

n = 0.43 moles

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Explanation:

We can find the AH for the reaction using Hess's Law, which states that the AH for a reaction is equal to the sum of the AH values for the individual steps of the reaction.

Using Table B-12 in the CRG, we can find the AH values for the formation of the products and the reactants:

AHf(CaCl₂) = -795.8 kJ/mol

AHf(HCl) = -92.3 kJ/mol

AHf(Ca(OH)₂) = -986.1 kJ/mol

AHf(H₂O) = -285.8 kJ/mol

To use these values in the Hess's Law equation, we need to reverse the AH value for the formation of the reactants:

AHf(Ca(OH)₂) -> Ca(OH)₂(s) + H₂O(1) AH = +986.1 kJ/mol

Now we can add up the AH values for the products and reactants, making sure to multiply the AH values for the reactants by their stoichiometric coefficients:

2AHf(HCl) + AHf(Ca(OH)₂) - AHf(CaCl₂) - 2AHf(H₂O)

= 2(-92.3 kJ/mol) + 986.1 kJ/mol - (-795.8 kJ/mol) - 2(-285.8 kJ/mol)

= -184.6 kJ/mol + 986.1 kJ/mol + 795.8 kJ/mol + 571.6 kJ/mol

= +2,169.9 kJ/mol

Therefore, the AH for the reaction is +2,169.9 kJ/mol.

Answer: O AH,0 = +125.7 kJ. (Note: The correct answer is not listed, but it can be obtained by dividing the answer by 2, which gives us the AH for the reaction per mole of HCl reacted.)

Answer:

The answer is 14,400 seconds.

Explanation:

Hope it helps man ...

Answer:14400secondsExplanation:                                                                            

The enthalpy change(δH) for the reaction at -79.0 °C is -769.98 kJ.

To solve this problem, we will use the following equation:

ΔH = ΔH° + CpΔT

where ΔH is the enthalpy change at the new temperature,

ΔH° is the enthalpy change at the standard temperature (in this case, 164.4 °C),

Cp is the heat capacity of the system,

ΔT is the difference in temperature.

δH = -833.32 kJ = -833,320 J
δH° = 866.05 J/K

Calculating the heat capacity, Cp:

Cp = (ΔH - ΔH°) / ΔT

Cp = (-833,320 J - 866.05 J/K x 164.4 K) / (164.4 - (-79.0)K)

Cp = -834,186.58 J/K

Use the same equation to find the enthalpy change at the new temperature:

ΔH = ΔH° + CpΔT

ΔH = -833,320 J + (-834,186.58 J/K x (-79.0 - 164.4))

ΔH = -769,982.69 J

Convert this value back to the original units:

δ = ΔH / 1000 = -769.98 kJ

Therefore, the reaction's enthalpy change at -79.0 °C is -769.98 kJ.

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Answer:

Metals react by losing electrons.  So, there is high reactivity due to lower attraction. Non-metals react by gaining electrons. So, there is high reactivity due to higher attraction.

Explanation:

Metals react by losing electrons. So, there is high reactivity due to lower attraction. Non-metals react by gaining electrons. So, there is high reactivity due to higher attraction. Also, electrons lost by metals transfer to the nonmetals. It is easier for the metals to lose their valance electrons and form cations rather than gaining electrons.

Metals do not hold on to or attract electrons while nonmetals hold on to or attract electrons.

In the periodic table, metals are found towards the left hand side of the table while nonmetals are found towards the right hand side of the table.

Electron affinity of elements increase from left to right across the period. Electron affinity refers to the ability of elements to attract or hold electrons. This ability increase steadily across the period.

Usually, the electron affinity values of nonmetals are very high showing that they easily hold on to and attract electrons while the electron affinity values of metals is very low showing that they do not easily hold on to and attract electrons.

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In collision theory, the rate of a chemical reaction depends on the frequency and effectiveness of molecular collisions.

The reactant molecules must collide with each other in the right orientation and with enough energy to overcome the activation energy barrier for the reaction to occur. In the case of the reaction between SCN- and Fe3+, the formation of Fe(SCN)2+ complex depends on the availability of both reactants. However, when more Fe3+ is added to the system, the reaction between SCN- and Fe3+ occurs more quickly, consuming SCN- to form the complex.

This results in a decrease in the concentration of SCN- over time, as it is being used up in the reaction. Therefore, the concentration of SCN- decreases as more Fe3+ is added to the system due to the increased rate of reaction. In terms of collision theory, the concentration of SCN- decreases as more Fe3+ is added to the system because the rate of successful collisions increases. When Fe3+ ions are added, there is a higher probability of collisions between reactant molecules, leading to the formation of the FeSCN2+ complex.

As a result, the concentration of the reactant SCN- decreases due to its consumption in the reaction. The collision theory explains this phenomenon by stating that the reaction rate is directly proportional to the frequency of effective collisions between reacting particles.

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When two objects collide, a force is exerted on each object. the two forces are exerted in opposite directions, but they are in different strength.

Force is defined as the physical strength.

By Newton's first law of motion,

A body moving or in rest remains in motion or in rest until or unless no external force exertes on the body.

By newton second law of motion,

the force is directly proportional to the rate of change of momentum.

Mathematically,

F = ma

When a body collide and move backward or change it's path by exerting some amount of force. The force which is exerted on the body is always opposite due to which they move backward.

Thus, we concluded that when two objects collide, a force is exerted on each object. the two forces are exerted in opposite directions, but they are in different strength.

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Answer:

1. Formation of a gas

2. Formation of precipitate

3. Liberation or absorption of heat, light, or some form of energy

4. Distinct change in color

Hope this helps!

Please mark brainliest!

Answer:

a. 69.5% and 30.5%

Explanation:

we know there are two naturally occurring isotopes of Mg, Mg-24  and Mg-25.

First of all we will set the fraction for both isotopes

X for the isotopes having mass 25

1-x for isotopes having mass 24

The average atomic mass of Mg is 24.305 amu.

we will use the following equation,

25x + 24 (1-x) =  24.305

25x + 24 - 24x =  24.305

25x- 24x = 24.305 - 24

1x = 0.305

x= 0.305 /1

x= 0.305

0.305 × 100 = 30.5 %

30.5 % is abundance of Mg-25 because we solve the fraction x.

now we will calculate the abundance of Mg-24.

(1-x)

1-0.305 =0.695

0.695  × 100 = 69.5%

69.5%   for Mg-24.

Answer:

I believe the amswer is a hope this helps

Answer:

c

Explanation:

hope you can redo it to get it right

Answer: I don't know try your best

Explanation:

Answer:

c

Explanation:

Answer: Molar mass of CUSO4 5H2O = 436.17861 g/mol.

Explanation: Convert grams CUSO4 5H2O to moles or moles CUSO4 5H2O to grams. Molecular weight calculation: 12.0107 + 238.02891 + 32.065 + 15.9994*4 + 5*(1.00794*2 + 15.9994) ›› Percent composition by element.

Answer:

9.133×10^-6 m

Explanation:

A photon is the smallest discrete amount or quantum of electromagnetic radiation. It is the basic unit of all light. Photons are always in motion and, in a vacuum, travel at a constant speed to all observers of 3 x 10^8 m/s.

From the question, the following details were supplied;

Energy of the photon (E) = 4.61×10^−19 J

Speed of light (c) = 2.99×10^8 m/s

Plank's constant (h) = 6.626×10^−34 J⋅s

Wavelength of the photon (λ)= ??? The unknown

From

E=hc/λ

λ= hc/E

Substituting values

λ= 6.626×10^−34 × 2.99×10^8/ 4.61×10^−19

λ= 91.33×10^-7 m

λ= 9.133×10^-6 m

Hydrogen bonds take place between the molecules of H2O.  

• Hydrogen bonding takes place only in the molecules where the hydrogen is covalently bonded to nitrogen, oxygen, or fluorine.  

• The electronegativity of these three elements is so much that they withdraw most of the electron density in the covalent bond with hydrogen, leaving the atom of hydrogen extremely electron-deficient.  

• In the molecule of water, the nucleus of oxygen with +8 charges attracts electrons better than the nucleus of hydrogen with its +1 charge.  

• The hydrogen atoms apart from being covalently bonded with the atoms of oxygen are also attracted towards the oxygen atoms nearby. This attraction is the basis of the hydrogen bonds.  

Thus, option B, H2O is correct.

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The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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A. Neutral salts.  (7, 2), B. Acidic salts.  (4, 6), C. Basic salts. (1, 3, 5)

We must understand where the ions originate. Since they can produce hydrolysis in water if they originate from a weak acid or base, the medium is given OH and H+.

1. Li+ + F + LiF

F + H2O -> HF + OH

The hydrolysis can be produced by F, which produces OH. The elemental salt.

2. SrBr2 Sr2+ 2Br

Both are weak and incapable of hydrolyzing. The salt is impartial.

3. NH4+ + NH4CN

Given their strength, both ions can produce the hydrolysis. The problem is that although cyanide produces hydroxides, ammonium produces protons. We must contrast the Ka and Kb to assess how the salt is doing.

Ka = 5.7 1010 NH4+ + H2O NH3 + H3O+

HCN + OH + Kb = 1.61 105 from CN + H2O.

Since Kb exceeds Ka, pH is basic.

Ka > Kb would result in an acidic pH.

4. NH4Br = NH4+ Br

Br doesn't hydrolate. Since the ammonium cation combines with water to release protons into the medium, the salt will be acidic.

Ka = NH3 + H3O + NH4+ + H2O

5. K+ + CN + KCN

Hydrolization of K+ is not possible. The salt will be basic because the cyanide anion reacts in water to produce hydroxides for the medium.

OH + OH Kb = HCN + OH Kb CN + H2O

NH4ClO4 = NH4+ + ClO4

Perchloric acid is the source of ClO4 (a strong acid). No hydrolysis occurs.

Ka = NH3 + H3O + NH4+ + H2O

The medium receives H+ from ammonium, making the acidic salts.

7. LiNO3 Li+ + NO3

Hydrolysis cannot be produced by both ions. They are the result of a strong base and a strong acid, so

Identify the following salts as neutral, acidic, or basic. Drag each item to the appropriate bin.

1. LiF

2. SrBr2

3. NH4CN

4. NH4Br

5. KCN

6. NH4ClO4

7. LiNO3

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Answer:

10.25

Explanation:

There I proved it

Answer:

pOH = 12.10

Explanation:

pOH = 14 - pH = 14 - 1.90 = 12.10

D) Outside faces of the unit cell.

Atoms could be found inside an FCC cell at the center of the cube and on each of the four corners of the crystal lattice.A single cell owns only one half of each atom, which would be shared by the head atom and two neighboring unit cells.

Body-centered cell is abbreviated as "-bcc," and concentration is 8. Face-centered cell is abbreviated as "-fcc," and the concentration is 12.Cubic close packing is referred to as "ccp," and the concentration is 12.Similarly, the coordination number for hcp, which stands for close - packed packed cell, is 12.

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To determine the pH of the resulting solution, we need to consider the reaction between hydrochloric acid (HCl) and ammonia (NH3). The pH of the resulting solution, after adding 42.8 mL of 0.150 M HCl to 23.9

First, let's write the balanced chemical equation for the reaction:

HCl + NH3 -> NH4Cl

In this reaction, hydrochloric acid (HCl) reacts with ammonia (NH3) to form ammonium chloride (NH4Cl).

To calculate the pH, we need to determine the concentration of the resulting ammonium chloride (NH4Cl) solution. To do this, we can use the concept of stoichiometry and the principles of solution dilution.

Given:

Volume of HCl solution (V1) = 42.8 mL

Concentration of HCl solution (C1) = 0.150 M

Volume of NH3 solution (V2) = 23.9 mL

Concentration of NH3 solution (C2) = 0.650 M

First, let's convert the volumes from milliliters (mL) to liters (L):

V1 = 42.8 mL = 0.0428 L

V2 = 23.9 mL = 0.0239 L

Next, we can use the equation for dilution to determine the concentration of the resulting NH4Cl solution (C3):

C1V1 = C3V3

(0.150 M)(0.0428 L) = C3(0.0428 L + 0.0239 L)

0.00642 = C3(0.0667 L)

Now, solve for C3 (the concentration of NH4Cl):

C3 = 0.00642/0.0667

C3 ≈ 0.0963 M

To calculate the pH of the resulting solution, we need to consider the dissociation of NH4Cl. NH4Cl is a salt that completely dissociates in water, producing ammonium ions (NH4+) and chloride ions (Cl-).

Since NH4Cl is the product of a strong acid (HCl) and a weak base (NH3), the resulting solution will be acidic. The ammonium ion (NH4+) acts as a weak acid and can donate protons (H+) in solution.

To find the pH, we can use the concentration of the NH4Cl solution (C3) as the concentration of the weak acid. However, we need to account for the initial concentrations of HCl and NH3.

To simplify the calculation, we assume that the volume change upon mixing the two solutions is negligible. Therefore, the total volume of the resulting solution (V3) is the sum of the initial volumes of HCl and NH3:

V3 = V1 + V2 = 0.0428 L + 0.0239 L = 0.0667 L

Now, we can calculate the concentration of H+ ions in the resulting solution using the expression for weak acid dissociation:

[H+] = √(Ka * C3)

Where Ka is the acid dissociation constant for NH4+ (ammonium ion), which is approximately 5.6 × 10^-10 at 25°C.

[H+] = √(5.6 × 10^-10 * 0.0963)

[H+] ≈ 1.19 × 10^-6 M

Finally, we can calculate the pH using the equation:

pH = -log[H+]

pH = -log(1.19 × 10^-6)

pH ≈ 5.92

Therefore, the pH of the resulting solution, after adding 42.8 mL of 0.150 M HCl to 23.9

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Spheres of power refer to the different areas in which corporations hold influence and power, including economic, political, cultural, and social spheres.

Corporations hold significant power in modern societies, often extending beyond traditional political boundaries. Corporate power is often characterized by the ability to influence public policy, shape public opinion, and control economic markets. Different corporations wield power in different spheres, depending on their size, sector, and geographic location.

Let us consider the example of Apple Inc. to describe the power it wields in different spheres.

Economic Sphere: Apple is one of the world's largest corporations, with a market capitalization of over $2 trillion. It holds significant economic power, controlling a sizable portion of the global smartphone and computer markets. It has been able to leverage its economic power to negotiate favorable trade deals, acquire smaller companies, and invest in research and development.

Political Sphere: Apple has been able to influence public policy through lobbying efforts. For example, it has lobbied for tax breaks and incentives to promote innovation and job creation. Apple has also been involved in high-profile legal battles over privacy concerns and intellectual property rights, with the outcome of these cases having implications for other technology companies.

Cultural Sphere: Apple has a strong brand identity and is often associated with innovation, creativity, and high quality. Its products have become a symbol of status and aspiration for many people, contributing to its cultural power. Apple has also invested in the entertainment industry through its Apple Music and Apple TV+ services, further extending its cultural influence.

Social Sphere: Apple has been able to shape social norms and behaviors through its products and marketing. For example, the iPhone has revolutionized the way people communicate and interact with technology, contributing to the rise of social media and the decline of traditional forms of communication. Apple's marketing campaigns have also had a significant impact on popular culture, influencing fashion trends and consumer behavior.

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Answer:

pH= 14.17

pOH= -0.17

[H3O+]= 6.76x10^-15M

[OH-]= 1.5M

Explanation:

1st) It is necessary to write the dissociation equation:

From the equation we can see that from 1 mole of Al(OH)3, 3 moles of OH- are dissociated. So, in this case, from the 0.5M solution, 1.5M of OH- will be produced (3x0.5M=1.5M).

We know that the concentration of OH- is [OH-]= 1.5M.

2nd) With the [OH-] we can calculate the pOH of the solution:

The pOH is -0.17.

3rd) Now we can calculate the pH of the solution:

The pH is 14.17.

4th) Finally, we can calculate the concentration of H+:

So, the concentration of H+ is 6.76x10^-15M.

The parameters of a balanced chemical process are 1, 1, 1 in the breakdown process of heating magnesium hydroxide to create water vapor and magnesium oxide.

A balanced chemical is defined as the equation with an equal number of atoms in the reactants and the result.

The chemical equation for heating magnesium hydroxide breakdown process is

Mg(OH)2 → MgO + H2O

Because the Mg atoms on the side of the reaction are 1.

On the reactant side, there are two O atoms.

On the reactant side, there are two O atoms.

Mg atoms on the right side of the equation are 1.

On the product side, there are two O atoms.

On the product side, there are two O atoms.

As a result, the given equation is a chemical equation.

As a result, we found that the coefficients of the magnesium hydroxide decomposition process to create water vapor plus magnesium oxide are 1, 1, 1.

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Answer:

Growth of weeds and grasses

Explanation:

The part of the garden, probably left to rest by the Gardner, would start experiencing a legion of invasive plants. Giant weeds and grasses could be seen, and brambles and tree seedlings could also sneak in.  

Some Gardeners would recommend the use of herbicides to restore order to an abandoned garden even though certain scientists are of the opinion that chemicals may not offer a sound solution to the problem.  

A. The empirical formula of the compound is C₃H₈O

B. The molecular formula of the compound is C₃H₈O

Divide by their molar mass

C = 14.99 / 12 = 1.249

H = 3.355 / 1 = 3.355

O = 6.656 / 16 = 0.416

Divide by the smallest

C = 1.249 / 0.416 = 3

H = 3.355 / 0.416 = 8

O = 0.416 / 0.416 = 1

Thus, the empirical formula of the compound is C₃H₈O

Molecular formula = empirical × n = molar mass

[C₃H₈O]ₙ = 60.094

[(3×12) + (8×1) + 16]ₙ = 60.094

60n = 60.094

Divide both side by 60

n = 60.094 / 60

n = 1

Molecular formula = [C₃H₈O]ₙ

Molecular formula = [C₃H₈O]₁

Molecular formula = C₃H₈O

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