The amount of energy required to raise the temperature of 1 kilogram of a substance by 1 kelvin is called its

Answer:

0.68 V

Explanation:

For anode;

3Mg(s) ---->3Mg^2+(aq) + 6e

For cathode;

2Al^3+(aq) + 6e -----> 2Al(s)

Overall balanced reaction equation;

3Mg(s) + 2Al^3+(aq) ----> 3Mg^2+(aq) + 2Al(s)

Since

E°anode = -2.356 V

E°cathode = -1.676 V

E°cell=-1.676 -(-2.356)

E°cell= 0.68 V

Carbon atoms may thus form bonds to as many as four other atoms. For example, in methane (CH 4​start subscript, 4, end subscript), carbon forms covalent bonds with four hydrogen atoms

__________________________________________________________

The molecular formula of the compound whose empirical formula is NO₂ is N₂O₄.

The relation between molecular formula and empirical formula is mentioned as follows:

molecular formula = empirical formula × n                        ......equation 1

where, n is number of building blocks needed to build the molecular formula.

Molar mass of NO₂ = Molar mass of molecular formula = 92 g/mol

Molar mass of one building block = the molar mass of the empirical formula = (1 × 14.0067 g/mol) + (2 × 15.9994 g/mol) = 46.0055 g/mol

Substitute value of  molar mass of molecular formula and  molar mass of the empirical formula in equation1,

92 = 46.0055 × n

n = 2

Using equation 1 , we get

Molecular Formula = NO₂ × 2

Molecular Formula = N₂O₄

The molecular formula is N₂O₄.

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The term that refers to the passing of a wave through an object is "transmission."

Transmission refers to the process by which a wave passes through an object or medium. In the context of sound, transmission occurs when sound waves travel through different substances, such as air, water, or solids.

When a sound wave encounters an object, it can be transmitted through it, reflected off it, or absorbed by it, depending on the properties of the object and the medium through which the sound is traveling.

For example, when you speak into a microphone, the sound waves produced by your voice travel through the air and are transmitted to the microphone's diaphragm. The diaphragm converts the sound waves into electrical signals, which can then be amplified and reproduced as sound through speakers.

In summary, transmission is the term used to describe the passage of a wave, such as a sound wave, through an object or medium. It is an essential concept in understanding how waves interact with their surroundings and how sound propagates through different materials.

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Answer:

\(M=44.06\frac{g}{mol}\)

Explanation:

Hello.

In this case, knowing the temperature, density and temperature of Y which behaves ideally, we can write the ideal gas equation:

\(PV=nRT\)

Whereas the moles are equal to the mass over the molar mass of Y:

\(PV=\frac{m}{M} RT\)

Thus, solving for the molar mass we write:

\(M=\frac{mRT}{PV}\)

Yet, since density is mass of over volume, we then write:

\(M=\frac{\rho RT}{P}\)

Considering the pressure in atm and the density in g/L:

\(P=95.3kPa*\frac{1atm}{101.325kPa}=0.941atm\\\\\rho=1.696\frac{g}{dm^3} *\frac{1dm^3}{1L}=1.696\frac{g}{L}\)

Therefore, by plugging the values in, we obtain:

\(M=\frac{1.696\frac{g}{L} *0.082\frac{atm*L}{mol*K}*298K}{0.941atm}\\\\M=44.06\frac{g}{mol}\)

Thus, the gas may be propane (\(C_3H_8\)) since it molar mass is 44.11 g/mol.

Best regards!

Answer: The answer is incus

The normal boiling point of the unknown liquid is 57.4°C.

The normal boiling point occurs when the vapor pressure of the liquid is equal to the atmospheric pressure. At normal boiling point, the temperature of the liquid is called the boiling point.

Using the Clausius-Clapeyron equation:

ln(P₂/P₁) = -(ΔHvap/R) * (1/T₂ - 1/T₁)

where P₁ is the vapor pressure at the given temperature T₁, P₂ is the vapor pressure at the boiling point temperature T₂, ΔHvap is the heat of vaporization, R is the gas constant.

At -170°C, the vapor pressure of the liquid is given as P₁ = 117 torr. At normal boiling point, the vapor pressure of the liquid is P₂ = 760 torr.

Converting all units to SI units, we have:

P₁ = 15.47 Pa

P₂ = 101325 Pa

ΔHvap = 5480 J/mol

R = 8.314 J/(mol*K)

Plugging in the values, we get:

㏑(101325/15.47) = -(5480/8.314) * (1/T₂ - 1/103.15)

Solving for T₂, the boiling point is found to be:

T₂ = 57.4°C

As a result, the unknown liquid's usual boiling point is 57.4°C.

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The identity of element Y can be any one of the following as all the options are representing elements.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

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Answer:

wrong

Explanation:

7isjsjosnjzisjjs6shjsmmjdjJenbzh t d grind tudbbsh8s h. rurmkr8wyhrkwijr

The speed that reflects the average kinetic energy of the molecules is known as the root-mean-square speed. using N2 at 25 °C.

The square root of temperature and the square root of the molar mass are both exactly proportional to the rms velocity. Thus, doubling the rms velocity of the molecules when the temperature of a specific gas is quadrupled.

The root mean square velocity of gaseous hydrogen molecules equals that of oxygen molecules at 47°C at what temperature.

A gas will effuse more quickly the lighter it is; conversely, the heavier a gas is ,the slower it flows, the more. Helium (He) will have the highest rate of effusion since it has the lowest molecular weight (atomic weight, in this example).

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Without conducting an experiment, one can determine if a species in a solution is acidic or basic by using a litmus paper.

Acidic species would turn a blue litmus paper to red but have no effects on red litmus paper.

Basic species would turn a red litmus paper to blues but have no effects on blue litmus paper.

Thus, in order to determine if a species in a solution is acidic or basic without conducting any experiment, dipping a litmus paper into the solution would give an indication.

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In a molecule or covalent bonding, elements having Octet electrons to obtain the stability with eight electrons.

One element that does not follow the octet rule is hydrogen. For stability only require stable electrons.

A molecule can present covalent bond but can be chemical.

Covalent bonding is a type of chemical bonding that occurs when two or more atoms share electrons in order to form a strong bond between them. This type of bond is formed when atoms share electrons in a way that gives each atom a full outer shell of electrons, known as the octet rule. This means that all atoms in the bond must have a total of eight electrons in their outermost shell. The atoms involved in a covalent bond form a molecule, which is held together by the shared electrons.

The octet rule is a guideline that states that atoms will bond in a way that allows them to have a full outer shell of electrons. This means that they must share electrons in order to reach a total of eight electrons in their outermost shell. The sharing of electrons creates a strong bond between the atoms that form a molecule. The sharing of electrons also results in the creation of a covalent bond.

However, not all elements follow the octet rule. For example, hydrogen only requires two electrons to reach a stable state, so it does not need to share electrons in order to reach the octet rule. Therefore, a hydrogen molecule will not have a covalent bond.

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Explanation:

The atomic number is equal to the number of protons in an atom's nucleus. Hydrogen's atomic number is 1 because all hydrogen atoms contain exactly one proton.

Answer:

4.5 g/cm^3

Explanation:

use formula d=m/v

45/10

d= 4.5 g/cm^3

Answer:

I am not the best to answer this but I think it would be B

Explanation:

As we know that the equivalency point of moles of added base will be equal to the moles of original acid, this allows to determine the number of moles of original acid.

At the equivalency point the moles of added base will be equal to the moles of original acid, this allows the determination of the number of moles of original acid. This can be combined with the original volume of the analyte solution in order to determine its concentration.

So we can conclude that at the equivalence point the moles of added base will be equal to the moles of original acid, this allows the determination of the number of moles of original acid.

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An example of heterogeneous equilibrium is:

Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.

Considering the given equations:

The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.

This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.

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pH determines the acidic or alkaline a solution is using the pH scale, which has a range of 0 to 14. An alkaline pH is greater than 7, while an acidic pH is less than 7.

Thus, The pH of a solution is defined mathematically as the negative logarithm of the molar concentration of hydrogen ions therein.

NaOH is a strong alkaline, as indicated by a pH testing strip, but in order to determine its exact pH, you must first determine its molarity.

A scale known as pH is used to describe how basic or acidic a water-based solution is. Basic solutions have a higher pH than acidic solutions, which have a lower pH.

Thus, pH determines the acidic or alkaline a solution is using the pH scale, which has a range of 0 to 14. An alkaline pH is greater than 7, while an acidic pH is less than 7.

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The pH of HNO₂ is 2.15, pH of NH₄OH is 10.98 and pH of H₂S is 3.76.

pH is defined as the negative logarithm of H⁺ ion concentration.

pH is a measure of how acidic or basic a substance is. In our everyday routine, we encounter and drink many liquids with different pH. Water is a neutral substance. Soda and coffee are often acidic.

The pH is an important property, since it affects how substances interact with one another and with our bodies. In our lakes and oceans, pH determines what creatures are able to survive in the water.

Given,

1. Concentration = 0.1

Ka = 4.5 × 10⁻⁴

\(pH = \frac{1}{2} (pka - log c)\)

pH = 0.5 × ( 3.3 + 1)

= 2.15

2.  Concentration = 0.05

Ka = 1.8 × 10⁻⁵

\(pOH = \frac{1}{2} (pkb - log c)\)

pOH = 0.5 × ( 4.74 + 1.3)

= 3.02

pH = 14 - pOH

= 14 - 3.02

= 10.98

3. Concentration = 0.3

Ka = 1 × 10⁻⁷

\(pH = \frac{1}{2} (pka - log c)\)

pH =  0.5 × ( 7 + 0.52)

= 3.76

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Explanation:

So what do you wanna know? The definition?

In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below.

The period of the pendulum is defined as  time it takes the pendulum to make one full back-and-forth swing

The pendulum is a device that could be used to demonstrate oscillatory motion. We know that the pendulum has a long string that is fastened to a support. The bulb is displaced at a small angle and the period is the time that is taken to complete the cycle.

The kind of motion that is undergone by a pendulum is what we define as the oscillatory motion. It is a regular repeating motion and the acceleration is directed always towards the center of the motion.

We can tell that the pendulum swings from one side to the other and we could use the stop clock to measure the movement of the pendulum. Thus it follows that the period of the pendulum is defined as  time it takes the pendulum to make one full back-and-forth swing.

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Answer:

Valence electrons are the electrons in the outermost shell, or energy level, of an atom.

Answer: The outermost shell

Explanation:

Valence electrons are located in the outermost shell of the atom, or the energy level as it is also known.

Fossil fuels are essential part of the power generation in the world. They are easily combustible and more reliable and cheaper. However, the burning of fossil fuels releases toxic gases  to the environment.

Fossil fuels are fuel generated from the decomposition materials. Petroleum, coal, natural gas  etc. are fossil fuels which are excavating from the earth.

Fossil fuels are non-renewable sources of energy. Hence, as the existing fossil sources are exhausted no more fossil fuel can be made. It is cheaper, reliable and easy to use.

However, the toxic hydrocarbon gases released from the burning of fossil fuels make the environment polluted. Therefore, overuse of fossil fuel definitely rise the atmospheric pollution.

Its use over the next 50 years, will increase the global warming and more of it will be exhausted.

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Answer:

5.08 x 10¹⁴ Hz

Explanation:

To find the frequency, you need to use the following equation:

f = c / λ

In this equation,

-----> f = frequency (Hz)

-----> c = speed of light (3.00 x 10⁸ m/s)

-----> λ = wavelength (m)

After converting the wavelength from nm to m, you can plug the given values into the equation and solve for "f".

 590 nm                     1 m
----------------  x  ------------------------  =  5.90 x 10⁻⁷ m
                              1 x 10⁹ nm

f = c / λ                                                              <----- Given equation

f = (3.00 x 10⁸ m/s) / (5.90 x 10⁻⁷ m)                <----- Insert values

f = 5.08 x 10¹⁴ Hz                                             <----- Divide

Answer:

The number of moles of water that can be made when 177.3 grams of HNO3 are consumed is 11.0.

This can be calculated using the following equation:

177.3 g HNO3 x (1 mol HNO3 / 63 g HNO3) x (2 mol H₂O / 6 mol HNO3) x (18 g H₂O / 1 mol H₂O) = 11.0 g H₂O

Glucose (C6H12O6, molecular weight 180.18) is a hexose—a monosaccharide containing six carbon atoms. Glucose is an aldehyde (contains -CHO group).

Glucose is an aldehyde (contains -CHO group). Its five carbons and one oxygen form a ring called a "pyranose ring", the most stable form for six-carbon aldoses. In this ring, each carbon is attached to a hydroxyl and hydrogen side group except for the fifth atom, which is attached to the sixth carbon on the outside of the ring, forming the CH2OH group. This ring structure is in equilibrium with the more reactive form.

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When dissolved in water, most Group 1 metal salts can be described as strong electrolytes.

When Group 1 metal salts are dissolved in water, they can be described as strong electrolytes. This is because Group 1 metals, such as lithium (Li), sodium (Na), potassium (K), and so on, readily lose their outermost valence electron to form positive ions (cations). These cations then dissociate completely in water, separating from the anions to which they were originally bonded.

The dissociation of Group 1 metal salts in water results in the formation of positively charged metal ions and negatively charged non-metal ions (anions). These ions are free to move and conduct electric current, making the solution a good conductor of electricity. The complete dissociation of Group 1 metal salts in water and the presence of freely moving ions make them strong electrolytes.

Strong electrolytes are substances that ionize completely or almost completely in solution, producing a high concentration of ions. This is in contrast to weak electrolytes, which only partially ionize and produce a lower concentration of ions.

In summary, when Group 1 metal salts are dissolved in water, they form strong electrolytes due to their ability to dissociate completely into ions, leading to a high concentration of freely moving ions in the solution, thus enabling efficient electrical conductivity.

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Answer:

Fractional distillation with the use of a reflux column and careful separation of ethanol fractions, often known as pure grain alcohol (PGA), may create around 96% ethanol and 4% water from either grain, oil or any other source. Search for images of various configuration kinds. Fractional distillation equipment. You can do alcohol enrichment freezes and removes fluid with a higher level of alcohol (sticks a hole into the ice and drains it to the centre). Don't try in a glass container.

Explanation:

To prepare a 0.12 M solution of FeCl₃, the amount of solid FeCl₃ to be dissolved in a given volume of solvent will be 9.72 grams.

Given,

Molarity of FeCl₃ (M)= 0.12 M

The molecular weight (m) of FeCl₃ is  = 162 gm

The volume of the solution (V) to be prepared is =500 ml

The amount of FeCl₃ to be dissolved to make a 0.12 M solution is= x

So,

MV= x ÷ m × 1000

0.12× 500 = x ÷ 162 × 1000

x = 60 × 162 ÷ 1000

x= 9.72 gm

So 9.72 grams of FeCl₃ is dissolved to make 500 ml of 0.12 M solution.

For preparing 0.4 M HCl from 4M HCL:

If we need to make 500 ml of solution with 0.4M of HCL, then we use the formula:

M₁V₁= M₂V₂

0.4 × 500= 4 × x

x= 50 ml

So 50 ml of 4M HCL is taken to make 0.4 M HCL.

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