How does the bond energy of HCl(g) differ from the standard enthalpy of formation of HCl(g)?

Explanation:

About which substance you are talking?

Answer:

yes, it's possible to covert molecule to molecule

Explanation:

Converting between molecules and moles is done by either multiplying by or dividing by Avogadro's number.

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The molarity of citric acid in lemon juice is 0.222 mol/L.

Molarity (M) is defined as the number of moles of solute dissolved in 1L of solution. Molarity is also known as Molar concentration. The S.I unit of Molarity is molar (M) or mol/L.

Molarity = \(\frac{\text{Number of moles}}{\text{Liters of solution}}\)

Number of moles = \(\frac{\text{Given mass}}{\text{Molar mass}}\)

                             = \(\frac{21.5\ g}{192\ \text{g/mol}}\)

                             = 0.111 mol

Now put the values in above formula we get

Molarity = \(\frac{\text{Number of moles}}{\text{Liters of solution}}\)

              = \(\frac{0.111\ mol}{0.5\ L}\)

              = 0.222 mol/L

Thus from the above conclusion we can say that The molarity of citric acid in lemon juice is 0.222 mol/L.

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Answer:

Compound

Explanation:

H2O is made up of multiple types of atoms, which makes it a compound. It isn't an element because they only consist of one type of atom.

True, the entropy of a perfectly ordered crystalline substance at 0 K is 0 J/mol.

The third law of thermodynamics states that, the entropy of a system approaches a constant value as the temperature of the system approaches absolute zero.

The entropy of any perfectly ordered, crystalline substance at absolute zero temperature is zero.  That is, the entropy of a pure, perfect crystalline substance at 0 K is 0 J/K.

Thus, we can conclude that the given statement is true.  The entropy of a perfectly ordered crystalline substance at 0 K is 0 J/mol.

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The name of the aromatic hydrocarbon shown in the photo is 1,4-dimethylbenzene.

Xylene, xylol or dimethylbenzene is a derivative of benzene. It is made up of carbon and hydrogen. It is a colorless, flammable liquid with a toluene-like odor. This aromatic hydrocarbon is a good solvent, we find it in many fuel formulations.

This aromatic hydrocarbon is found in different substances such as some oils, in coke gases (combustible gases that have a luminous flame when burned) and in gases obtained from the distillation of wood.

Xylenes are substances that can affect the functions of living beings, their vapors can give different symptoms such as nausea, headache and discomfort.

Therefore, we can confirm that the name of the aromatic hydrocarbon shown in the photo is 1,4-dimethylbenzene.

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The percent yield of \(Fe_2O_3\)  if 57.8g was collected is 75.1%.

To calculate the percent yield, we need to compare the actual yield (the amount of\(Fe_2O_3\) collected) to the theoretical yield (the amount of \(Fe_2O_3\)that would be obtained if the reaction went to completion).

First, we need to determine the molar mass of \(Fe_2O_3\) and \(Fe_2S_3\):

Molar mass of \(Fe_2O_3\):

2(55.85 g/mol) + 3(16.00 g/mol) = 159.69 g/mol

Molar mass of\(Fe_2S_3\):

2(55.85 g/mol) + 3(32.07 g/mol) = 207.67 g/mol

Next, we can calculate the theoretical yield of\(Fe_2O_3\) using stoichiometry:

2 moles of \(Fe_2S_3\) produce 2 moles of \(Fe_2O_3\)(according to the balanced equation).

So, the molar ratio of \(Fe_2O_3\)to Fe2S3 is 2:2.

The molar mass ratio of \(Fe_2O_3\) to Fe2S3 is:

159.69 g/mol : 207.67 g/mol

To calculate the theoretical yield, we can use the following equation:

Theoretical yield of\(Fe_2O_3\) = (mass of \(Fe_2S_3\)) * (molar mass of \(Fe_2O_3\) / molar mass of \(Fe_2S_3\))

Theoretical yield of \(Fe_2O_3\) = (100.0 g) * (159.69 g/mol / 207.67 g/mol)

Theoretical yield of \(Fe_2O_3\) = 76.46 g

Now we can calculate the percent yield using the formula:

Percent yield = (actual yield / theoretical yield) * 100

Percent yield = (57.8 g / 76.46 g) * 100

Percent yield = 75.1%

Therefore, the percent yield of \(Fe_2O_3\) is 75.1%.

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Answer:

D

Explanation:

The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.

The general form of a neutralization reaction is HF + FrOH → FrF + H₂O

We refer to this as a neutralisation reaction. Only this reaction, which produces NaCl and water as products, is a neutralisation reaction since it involves HCl and NaOH. The resulting response is listed below: NaCl(aq) + H₂O = HCl(aq) + NaOH(aq) (l)

The interaction of H⁺ ions and OH⁻ ions produces water in a neutralisation reaction, which occurs when an acid and a base combine to make water and a salt. The neutralisation of a strong acid and strong base yields a pH of 7.

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Answer:

The number of these organisms in the soil would decrease.

Explanation:

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Answer:

C₄H₆O₃ + H₂O ⇒ 2C₂H₄O₂

Explanation:

Given:

C₄H₆O₃ + H₂O ⇒ C₂H₄O₂

Find:

Balance equation

Computation:

C₄H₆O₃ + H₂O ⇒ C₂H₄O₂

C₄H₆O₃ + H₂O ⇒ 2C₂H₄O₂

Number of atom should be equal in LHS and RHS.

So,

We have to multiply 2 in RHS to get equal number of atom.

Answer:

Cell is defined as the smallest unit or basic unit of life.

the smallest part of a living thing that can carry out the activities needed for life. Basically the unit of all forms of life.

Explanation:

hope this helps in anyway :)

Answer: A LOWER ENERGY

Explanation:

did the test

Answer:

A lower energy!

Explanation:

I know this is not much of an explanation but I took the test i hope you have an amazing day afternoon or night! Hope this helps :3

The mass of the unknown element cobalt is obtained as 40 g. This can be seen from the calculation that we have in the solution.

If you have a compound that contains an unknown element, you can use the molar mass of the compound to find the relative atomic mass of the unknown element

We can see that the question has already given us the mass of the sample as we have and the percentage of the cobalt that we have in the sample.

50 = x/80 × 100

x = 50/100 × 80

= 40 g

Thus we would have a total of about 40 g of cobalt in the sample.

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Missing parts;

A sample of the compound weighs 80 grams.  If the mass percent of cobalt is 50%, How many grams of cobalt are in the sample?

Answer:

c

Explanation:

When 2.0 moles of KCIO3 decompose, 2.0 moles of O2 will form.

The balanced chemical equation shows that 2 moles of KCIO3 decompose to produce 3 moles of O2. Therefore, we can use the stoichiometric ratio from the balanced equation to determine the number of moles of O2 formed when 2.0 moles of KCIO3 decompose.

According to the stoichiometry, 2 moles of KCIO3 produce 3 moles of O2. Therefore, we can set up a proportion:

(2 moles KCIO3 / 2 moles O2) = (2.0 moles KCIO3 / x moles O2),

where x represents the unknown number of moles of O2 formed.

Simplifying the equation:

(2 moles KCIO3 / 2 moles O2) = (2.0 moles KCIO3 / x moles O2),

1 = (2.0 moles KCIO3 / x moles O2),

Cross-multiplying:

x moles O2 = (2.0 moles KCIO3 / 1),

x moles O2 = 2.0 moles KCIO3.

Therefore, when 2.0 moles of KCIO3 decompose, 2.0 moles of O2 will form.

It is important to note that this calculation assumes complete and ideal conditions, where the reaction proceeds with 100% efficiency. In reality, the actual yield of O2 may be lower due to various factors such as side reactions or incomplete decomposition. To determine the actual yield, additional information or experimental data would be required.

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The mass of the ammonia that is required is  258 g.

The quantitative correlations between the reactants and products in a chemical reaction are the focus of the chemistry subfield known as stoichiometry.

We have to know that;

1 mole of CO2 produces 1 mole of urea

2.2 moles of CO2 produces 2.2 urea

Given that the number of moles of urea = 455 g/60 g/mol

= 7.58 moles

Now;

2 moles of NH3 produces 1 mole of urea

x moles of NH3 produces 7.58 moles of urea

x = 7.58 * 2/1

= 15.16 moles

Mass of the ammonia =  15.16 moles * 17 g/mol

= 258 g

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The products benzoin and meso-hydro benzoin melting points are same. Their temperature is 13341 degrees Celsius. Using the melting point method makes it challenging to directly determine. It would be necessary to determine the reaction's end product and then measure the melting point.

The thermal analysis that is most usually used to describe solid crystalline materials is melting point determination. It is used to identify solid crystalline chemicals and to assess their purity in research and development as well as in quality control in different industry areas.

The melting values of the products were between benzoin and meso-hydro benzoin 135 and 137, indicating that the molecule is likely benzoin because they are so similar to benzoin's melting points (135 to 137). Compared to hydroxybenzoic acid, benzoin has a melting point range that is closer to the finished product.

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ANSWER

OPTION B

STEP-BY-STEP EXPLANATION:

Boyle's law state that "the volume of a given gas is inversely proportional to its pressure provided the temperature remains constant."

Mathematically, this law can be translated below as

Therefore, when the temperature is constant, the temperature cancels out and it will remain only pressure and volume.

Hence, the correct option is option B

Answer: RATIOS IN TERMS OF MOLES

Solution: Solution According to the balanced equation, 2 moles of NH3 are produced when 3 moles of H2 react.

The molecule that is drawn in a conformation that has a proton and a leaving group anti-periplanar is H₂C, Br.

The A, B, C, and D bond angles of a molecule are referred to as anti-periplanar, or antiperiplanar, in organic chemistry. The dihedral angles of the A–B and C–D bonds in this conformer are larger than +150° or less than 150°. In textbooks, the term "anti-periplanar" is frequently used to refer to a strictly anti-coplanar structure with a 180° AB CD dihedral angle. The anti-periplanar functional groups will be 180° apart from one another and in a staggered configuration in a Newman projection of the molecule.  

Conformation is an essential factor in predicting reactivity in organic molecules. The anti-periplanar conformation of a molecule is one that occurs when two atoms in a molecule are in the same plane and are separated by 180 degrees. In this case, the proton and leaving group are placed in a perpendicular plane to the atoms directly in between them. This is the most stable conformer of the molecule. A significant factor in predicting reactivity in organic molecules is conformation. In this case, the molecule H₂C, Br is drawn in a conformation that has a proton and a leaving group anti-periplanar.

Therefore, the correct option is H₂C, Br.

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Elements that will loose electron as so that ion can be formed are; Fe and Pb.

Therefore, Metals usually lose electron while non- metals accept the electron.

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In an acetic acid solution:

1. To make a buffer with pH = 5.00, have a ratio of

\(\frac{[A-]}{[HA]} = 10^{-5.50}\) = 0.316.

The volume of sodium hydroxide needed:

V(NaOH) = (0.316 M - 0.200 M) / 4.50 M = 0.0316 L = 31.6 mL

Therefore, 31.6 mL of 4.50 M sodium hydroxide must be added to 250.0 mL of 0.200 M acetic acid solution to make a buffer with pH = 5.00.

2. The pH of the buffer is calculated as follows:

pH = pKa + log(\(\frac{[A-]}{[HA]}\))

= 4.76 + log(0.2/0.1)

= 4.86

Therefore, the pH of the buffer is 4.86.

3. The mass of salt that must be dissolved in 0.25 dm³ of 1 mol dm³ propanoic acid to give a buffer of pH 4.87:

\(\frac{[A-]}{[HA]} = 10^{-4.87}\) = 0.0114

Therefore, the mass of acetate that must be dissolved:

Mass of acetate = (0.0114 mol dm³)(0.25 dm³) = 0.00285 g

Therefore, 0.00285 g of sodium propanoate must be dissolved in 0.25 dm³ of 1 mol dm³ propanoic acid to give a buffer of pH 4.87.

4. The pH of the buffer is calculated as follows:

pH = pKa + log(\(\frac{[A-]}{[HA]}\))

= 4.74 + log(0.1/0.1)

= 4.74

Therefore, the pH of the buffer is 4.74.

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To determine the pH of a solution based on the hydronium ion concentration, you can use the equation:

pH = -log[H₃O⁺]

where [H₃O⁺] is the concentration of hydronium ions.

In this case, the hydronium ion concentration is 6.5x10^-4 M.

Calculating the pH:

pH = -log(6.5x10^-4)

= -log(6.5) - log(10^-4)

= -log(6.5) + 4

Using a calculator or logarithmic tables, you can find that the logarithm of 6.5 is approximately 0.81.

pH ≈ 0.81 + 4

pH ≈ 4.81

Rounding to the nearest whole number, the pH of the solution is approximately 5.

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Answer:

basalt

Explanation:

you hav a calculater u know

The equations represent an acid-base reaction is Ca ( OH )₂ + 2HBr ⇒ CaBr₂ + 2H₂O . Therefore, option D is correct.

The acid-base reaction (neutralization reaction) A salt and water are created when an acid and a base interact and neutralize one another. neutralization. a reaction between an acid and a base that results in a solution that isn't as basic or acidic as the initial solutions.

Salts and water are always present in most acid-base interactions. For instance, sodium hydroxide (NaOH) and hydrochloric acid (HCl) react to produce sodium chloride (NaCl) salt and water (H2O).

A neutralizing reaction occurs when an acid and a base interact. This reaction yields a salt and water as byproducts.

Thus, option D is correct.

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Answer:

[Kr] 4d² 5s²

Explanation:

6 molls

As a result, if two moles of dinitrogen gas are specified, six moles of dihydrogen gas are needed.