calculate the concentrations of all species present in a 0.29 m solution of ethylammonium chloride (c2h5nh3cl).

Volume (in L) of Carbon dioxide : 23.6 L

Avogadro's hypothesis:  

In the same T,P and V, the gas contains the same number of molecules  

So the ratio of gas volume will be equal to the ratio of gas moles  

\(\tt \dfrac{V_1}{n_1}=\dfrac{V_2}{n_2}\)

Combustion of ethane :

\(\tt 2C_2H_6+7O_2\Rightarrow 4CO_2+6H_2O\)

mol ratio of C₂H₆ : CO₂ ⇒ 2 : 4

so the volume of CO₂ :

\(\tt \dfrac{V_1}{n_1}=\dfrac{V_2}{n_2}\\\\\dfrac{11.8}{2}=\dfrac{V_2}{4}\\\\V_2=\boxed{\bold{23.6~L}}\)

Answer:

23.6

Explanation:

Answer:

The reaction can produce 287 grams of iron(II) carbonate

Explanation:

To solve this question we must find the moles of iron(II) chloride that react. Using the chemical equation we can find the moles of iron(II) carbonate and its mass -Molar mass FeCO3: 115.854g/mol-

Moles FeCl2:

1.24L * (2.00mol / L) = 2.48 moles FeCl2

As 1 mol FeCl2 produce 1 mol FeCO3, the moles of FeCO3 = 2.48 moles

Mass FeCO3:

2.48mol * (115.854g / mol) =

Answer:

The formula is Na2C2O4

Explanation:

I hope this helps

The statement that is NOT true is:

C. A given radioisotope behaves chemically just like non-radioactive isotopes of the same element.

Radioisotopes, which are radioactive isotopes, can exhibit different chemical behaviors compared to their non-radioactive counterparts. The presence of additional neutrons in the nucleus of a radioisotope can affect its stability and reactivity. Radioisotopes can undergo radioactive decay, emitting radiation during the process, which can lead to changes in their chemical behavior.

Therefore, the correct answer is C. A given radioisotope does not behave chemically just like non-radioactive isotopes of the same element.

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The statement that is NOT true is A. except for those living near nuclear plants or uranium mines, we are not normally exposed to radiation.

The statement suggests that apart from individuals living near nuclear plants or uranium mines, we are not exposed to radiation in normal circumstances. However, this statement is incorrect.

Radiation exposure can occur from various sources such as cosmic radiation, natural radioactive materials in the environment (e.g., radon gas), medical procedures (e.g., X-rays), and consumer products (e.g., smoke detectors). Therefore, exposure to radiation is not limited to individuals living near nuclear plants or uranium mines(A).

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Mass spectrometry identifies molecules based on their molecular weight and weights of fragments formed from the molecules.

This is referred to as the measurement of the interactions between light and matter ad involves the use of different parameters.

Mass spectrometry is referred to as a tool which is used to measure the molecular weight and weights of fragments formed from the molecules in the form of mass-to-charge ratio. It is done using electric and magnetic fields so as to get the accurate result and is therefore the reason why it was chosen as the correct choice.

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The correct explanation for why the slope of segment t is higher than the slope of segment r is because the specific heat capacity of gaseous ethanol is lower than that of liquid ethanol (explained by the statement "a").

Beer, wine, and spirits all contain ethanol when they are diluted. It is a topical ingredient used in pharmaceutical preparations (such as rubbing compounds, lotions, tonics, and colognes), cosmetics, and perfumes to prevent skin infections. Organic substances include ethanol. With the chemical formula C2H6O, it is an alcohol. Its chemical formula can also be expressed as C2H5OH or CH3CH2OH. A volatile, flammable, colorless liquid known as ethanol has a distinctive wine-like odor and bitter flavor.

Because it interferes with immune system and hepatic metabolism, ethanol can cause malnutrition and have a direct toxicological effect. Alcohol and a number of cancers have been linked causally, according to research. The effects of ethanol consumption include nausea, slurred speech, reduced reaction times, altered moods, and uncoordinated movements. Higher exposures might lead to symptoms like sweating, vomiting, dizziness, confusion, and blurred vision.

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Answer:

When a saturated solution at a high temperature is cooled, why is the solution separated as a solid? When a saturated solution at a high temperature is cooled, inter molecular space between the molecules of the solution decreases. As a result, no more solute can remain in a solution separating out as a solid crystal.

Answer:

\(5.1 \div 5.63\)

The molecule or compound that contains an ionic bond from the options provided is NH₄NO₃.

Ionic bonds are strong electrostatic forces that exist between oppositely charged ions. Ionic bonds are created by the exchange of electrons between two atoms or molecules that differ greatly in electronegativity. An ion is an atom or molecule with a positive or negative charge due to the loss or gain of one or more electrons.

An ionic bond is formed between a positively charged ion (cation) and a negatively charged ion (anion). In ionic compounds, the number of positively charged cations and negatively charged anions is always equal. A simple example of an ionic compound is table salt (NaCl), where one sodium ion (Na+) and one chlorine ion (Cl−) are held together by ionic bonds.

C₂Cl₄: It has only covalent bonds.

CO₂: It has only covalent bonds.

SiF₄: It has only covalent bonds.

OCl₂: It has only covalent bonds.

NH₄NO₃: It contains an ionic bond.

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The maximum possible solubility of concentration of lead in drinking water from lead pipes is \(7*10^_-9\) M, which is below the US EPA limit.

At the point when lead pipes are utilized to convey drinking water, lead particles can break down into the water from the outer layer of the lines, framing an answer of lead(II) particles.

The most extreme conceivable fixation or molar dissolvability of lead in this water can be determined utilizing the solvency item consistent (Ksp) of lead(II) hydroxide \((Pb(OH)_{2}\)and the stoichiometry of the disintegration response.

The disintegration of lead(II) hydroxide in water can be addressed as:

\((Pb(OH)_{2}\)(s) ⇌ \(Pb_{2} ^{+}\)(aq) + \(2OH^{-}\)(aq)

The Ksp articulation for this response is Ksp = [\(Pb_{2} ^{+}\)]\([OH^{-} ]^2\) = \(2.8*10^_-16\).

To find the most extreme conceivable convergence of lead in water, we really want to decide the centralization of lead particles that can be in balance with lead(II) hydroxide at this Ksp esteem.

Since there are two Goodness particles in the disintegration response, we can accept that the convergence of Gracious particles will be two times the centralization of \(Pb_{2} ^{+}\) particles.

Involving the Ksp articulation and settling for [\(Pb_{2} ^{+}\)], we get:

[\(Pb_{2} ^{+}\)] = Ksp/\([OH^{-} ]^2\)

Subbing the Ksp esteem and expecting a centralization of Gracious particles equivalent to 2x[\(Pb_{2} ^{+}\)], we get:

[\(Pb_{2} ^{+}\)] = (2.8x\(10^_-16\))/(2\([OH^{-} ]^2\)) =\(7*10^_-9\)M

Accordingly, the greatest conceivable centralization of lead in water coming from lead(II) hydroxide broke up from the lines is \(7*10^_-9\) M. This focus is lower than the US EPA limit on lead in drinking water, which is \(7.2*10^_-8\) M, showing that lead pipes are not appropriate for conveying drinking water because of the potential wellbeing chances related with lead openness.

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Explanation:

I. husking

ii. use magnet

III. husking

iv. floatation

v. Fractional distillation

Answer:

A gas is most soluble in water under conditions of high pressure, and low temperature.

Explanation:

While CO2 can be distilled from the air, that method is expensive and inefficient. Therefore, it is usually captured from other sources where it is a waste material. This could be anything from brewing beer to burning fossil fuels. However, the most efficient way of producing carbon dioxide is from ammonia.

The number of moles that contains 5.3 × 10¹² particles of water is 8.8 × 10-¹² moles.

The number of moles in a substance can be calculated by dividing the number of atoms/molecules in the substance by Avogadro's number as follows:

no of moles = no of atoms ÷ 6.02 × 10²³

According to this question, a container contains 5.3 × 10¹² particles of water. The number of moles can be calculated as follows:

no of moles = 5.3 × 10¹² ÷ 6.02 × 10²³

no of moles = 8.8 × 10-¹² moles

Therefore, 8.8 × 10-¹² moles is present in the water molecule.

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Answer:

the answer would be d. usually dull in appearance

Explanation:

because brittle bendable and poor conductor of heat and electricity are all for the non-metals

Answer:

C !!

Explanation:

hope this helps! usually people classify metals based on if they can conduct heat or electricity

The volume of a sample of nitrogen gas is 7.08 L

It is given that

volume of gas at 500°C = 10 L = 773 k

We have to find

volume of gas at 275°C = 548 k

Charles Law states that the volume of a given mass of a gas is directly proportional to its Kevin temperature at constant pressure. In mathematical terms, the relationship between temperature and volume is expressed as

The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius).

V1/T1 = V2/T2

10/773 = V2/548

V2 = 7.08 L

Hence, volume of a sample of nitrogen gas is 7.08 L

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Answer:

H2 + 3N2 ⇒ 2NH3

Explanation:

Remember when balancing chemical equations you are trying to make sure that each side of the equation has a equal number of atoms, and when one sides number of atoms is odd you need to multiply to get a even number.

H2 + N2 = NH3

N = 1 × 2 = 2

H = 3 × 2 = 6

N = 2 × 1 = 2

H = 3 × 2 = 6

H2 + 3N2 ⇒ 2NH3

Hope this helps.

Sorting the chemical elements in order from least reactive to most reactive, we have:

1. Fluorine (F).

2. Arsenic (As).

3. Antimony (Sb).

4. Silicon (S).

Given the following chemical elements:

Reactivity can be defined as a chemical property which determines how readily a chemical element bonds with other chemical elements, in order to form a new chemical compound.

Generally, the ability of a chemical element to bond with other chemical elements is largely (highly) dependent on the number of valence electrons it has in the outermost shell of its atomic nucleus.

As a general rule, chemical elements that are having fewer number of valence electrons are the most reactive while those having higher valence electrons are least reactive.

Also, chemical reactivity decreases down a group on the periodic table.

Based on the periodic table, the valency for the given chemical elements are:

In conclusion, sorting the chemical elements in order from least reactive to most reactive, we have:

1. Fluorine (F).

2. Arsenic (As).

3. Antimony (Sb).

4. Silicon (S).

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Total volume of the solution formed will be 32.5 liters

Given:

Molarity of solution = 0.0200 m

mass of nacl = 38.0 grams

To Find:

total volume of the solution

Solution: Molarity is defined as the amount of solute present in 1 L of solution. The equation used to determine molarity of the solution follows:

M = given mass of nacl/molar mass of nacl*1/volume of solution

volume of solution = given mass/molar mass*1/molarity

volume = 38/58.5*1/0.02 = 32.5

Hence, volume of solution = 32.5 litres

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The unidentified compound's weight in the recipe is To find the fraction, divide the percentage by 100. 63.55 divided by the fraction equals the molecular weight. 225.4 atomic units.

It is utilized in pyrotechnics, pyrolysis, anti-fouling coatings, flame proofing, printing, photocopying, and electrolysis operations. The atomic number 29 and chemical symbol Cu are assigned to the element copper.

Cu2O, Cu2Cl2, and cuprous sulfide are a few of the significant commercial compounds of copper(I) (Cu2S). The mineral cuprite, which contains cuprous oxide as a reddish brown or red crystal or powder, naturally occurs.

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The name of the organic compound is 2-methyl pentane. The given organic compound is a five-carbon system with a substitution at the C-2 carbon. The naming of an organic compound is done according to the rules given by IUPAC.

The given organic compound has 5 carbon in its main chain. So It has the root word Pent. Since, all the bonds are single bonds, the organic compound is saturated, hence it has the suffix -ane. Hence the unsubstituted straight chain is pentane.

Numbering is done from right to left, because when the numbering is from right to left, the substituted carbon gets C-2, when it is numbered from left to right, the substituted carbon gets C-4. So the numbering is from the right and the substituted carbon is C-2. The substituent is a single carbon system, a methyl substituent. So the organic compound is named 2-methyl pentane .

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The most common refrigerant desiccants are molecular sieves and XH-9.

These desiccants are used to remove moisture from refrigerant systems, ensuring optimal performance and preventing any issues related to moisture, such as corrosion or ice formation.

Also, The most common refrigerant desiccants are activated alumina and XH-9.

A substance known as a refrigerant is usually found in either a fluid or gaseous condition. When paired with other parts like compressors and evaporators, it may provide refrigeration or air conditioning and rapidly absorbs heat from the surroundings.

Refrigerant is housed in copper coils inside air conditioners. Refrigerant changes from a low-pressure gas to a high-pressure liquid as it absorbs heat from indoor air. The refrigerant is sent outside through air conditioning components, where it is exhausted to the outside by a fan that blows hot air over the coils.

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The deep interior of the Sun rotates like a solid body: Helioseismology studies have revealed that the rotation of the Sun's interior is not uniform. Instead, it shows differential rotation.

Where the equator rotates faster than the poles. This discovery contradicts the notion that the Sun rotates as a solid body. Nuclear fusion occurs only within the core of the Sun: Helioseismology has confirmed that the core of the Sun is the primary site of nuclear fusion, where hydrogen is converted into helium through the process of nuclear fusion. This understanding aligns with our current models of stellar evolution.

The remaining statements are not directly related to helioseismology studies: Magnetic fields block the outward flow of energy in sunspots: This statement pertains to the behavior of magnetic fields in sunspots, which is more closely associated with solar magnetism and observational studies rather than helioseismology. Convection occurs only in the upper 30% of the solar interior: Convection plays a crucial role in energy transport within the Sun, but it is not limited to the upper 30% of the solar interior.

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This is because convection is energy transfer by currents of moving liquid or gas.

Heat transfer by convection is the transfer of heat from one place to another due to the movement of fluid.

When cooking in a convection oven, for best results you place your food in the center of the oven, this is because convection is energy transfer by currents of moving liquid or gas.

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This is because convection is a type of energy transfer by currents of moving liquid or gas (Option A).

Convection is a physical natural phenomenon associated with energy transfer through a fluid.

In convection, a suitable fluid that produces what transfer can be for example air and/or water.

In conclusion, this is because convection is energy transfer by currents of moving liquid or gas (Option A).

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the producers' surplus at a price of $14 and MC = $6 would be $8.

The first step is to find the quantity supplied at the given price of $14. Substituting p = 14 in the supply equation, we get:
14 = 10 + 2q
4 = 2q
q = 2
Therefore, at a price of $14, the quantity supplied is 2 units. To calculate the producers' surplus, we need to find the area between the supply curve and the price line, up to the quantity supplied. This is a right triangle with base 2 (the quantity) and height (p - MC), where MC is the marginal cost of producing one unit. The marginal cost is not given, so we cannot calculate the exact value of producers' surplus. However, we can say that it will be positive as long as the price is above the marginal cost. If we assume a marginal cost of $6, for example, then the height of the triangle would be 14 - 6 = 8. The area would be (1/2) x 2 x 8 = $8. Therefore, the producers' surplus at a price of $14 and MC = $6 would be $8.

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Answer:  When the concentration of the weak acid is reduced in a weak acid/strong base titration, it can affect the shape of the titration curve. The titration curve represents the pH change as a function of the volume of the strong base (titrant) added to the weak acid (analyte) solution.

Explanation:

Here are the possible scenarios based on the reduction of acid concentration:

Steeper Initial Slope: When the concentration of the weak acid is reduced, the initial slope of the titration curve becomes steeper. This occurs because there is a lower concentration of acid available to react with the strong base initially. As a result, the pH of the solution changes more rapidly as the strong base is added.

Lower Equivalence Point pH: The equivalence point in a weak acid/strong base titration represents the point at which the moles of acid and base are stoichiometrically equivalent. With a reduced concentration of the weak acid, the equivalence point pH may be lower compared to a higher acid concentration. This occurs because there is less acid available to neutralize the strong base completely, resulting in a higher concentration of hydroxide ions (OH-) and a corresponding increase in pH.

Lower Buffer Capacity: A weak acid solution acts as a buffer, resisting changes in pH when small amounts of strong base are added. With a reduced concentration of the weak acid, the buffer capacity decreases. This means that the solution is less effective at maintaining a relatively stable pH as the strong base is added, resulting in more significant pH changes.

It's important to note that the shape of the titration curve is influenced not only by the concentration of the weak acid but also by factors such as the strength of the acid and base, their respective dissociation constants, and the volumes of acid and base used. Therefore, while reducing the acid concentration can have the effects mentioned above, other factors may also come into play and influence the overall shape of the titration curve.

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The correct ground state electron configuration for Sr (strontium) is:

d. [Kr]5s^24d^2.

In the electron configuration, [Kr] represents the noble gas krypton, which comes before strontium in the periodic table and accounts for the filled electron shells prior to strontium. The 5s^2 portion indicates that there are two electrons occupying the 5s orbital, which are the valence electrons of strontium.

Following the noble gas notation, we start with the electron configuration of krypton: [Kr] = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6.

To complete the electron configuration for strontium, we add the remaining electrons. The 5s orbital is lower in energy than the 4d orbital, so the 5s electrons are added before the 4d electrons. Thus, we have [Kr]5s^2.

Finally, since strontium has an atomic number of 38, its full electron configuration is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^2.

This electron configuration accurately represents the distribution of electrons within strontium in its ground state, indicating the specific orbitals and the number of electrons present in each.

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Strontium (Sr)'s precise ground state electron configuration is [Kr]5s2, which is represented by option b in the notation for electron configurations.

The distribution of electrons in the ground state electron configuration of strontium (Sr) depicts the atomic structure of that element.. The electron configuration for a ground state Sr atom is [Kr]5s2. In this configuration, 'Kr' represents a core of electrons identical to that in a krypton atom, and '5s2' indicates two electrons in the 5s subshell. This correct answer aligns with option b [kr]5s2. The core notation [Kr] helps simplify the representation of the electron configuration.

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