Name this compound. Please help

Answer:

Explanation:

(a) C5H5N(aq)+H2O(l)⇌C5H5NH+(aq)+OH−(aq)

Answer:

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore they rarely react with other elements since they are already stable

The heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol. To calculate the heat of reaction (ΔH) for the given reaction:

CCl₄(g) + H₂O(g) -> CHCl₃(g) + HCl(g)

You would need the standard enthalpies of formation for each compound involved in the reaction. The standard enthalpy of formation (ΔHf) is the enthalpy change when one mole of a compound is formed from its elements in their standard states.

Here are the standard enthalpies of formation for the compounds involved:

ΔHf[CCl₄(g)] = -135.5 kJ/mol

ΔHf[H₂O(g)] = -241.8 kJ/mol

ΔHf[CHCl₃(g)] = -104.7 kJ/mol

ΔHf[HCl(g)] = -92.3 kJ/mol

To calculate ΔH for the reaction, you need to sum up the enthalpies of formation of the products and subtract the sum of the enthalpies of formation of the reactants:

ΔH = ΣΔHf(products) - ΣΔHf(reactants)

ΔH = [ΔHf[CHCl₃(g)] + ΔHf[HCl(g)]] - [ΔHf[CCl₄(g)] + ΔHf[H₂O(g)]]

ΔH = [(-104.7 kJ/mol) + (-92.3 kJ/mol)] - [(-135.5 kJ/mol) + (-241.8 kJ/mol)]

ΔH = -196.9 kJ/mol - (-377.3 kJ/mol)

ΔH = 180.4 kJ/mol

Therefore, the heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol.

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Answer:

Explanation:

Lattice energy is a way to measure the bond strength in ionic compounds. Ionic compounds tend to have high melting and boiling points. Ionic compounds tend to be hard. Ionic compounds have a range of solubilities.

Answer:

influence of a business invironment

The student should take the average of the results from all four trials to obtain the highest level of accuracy.

Chemistry's definition of accuracy is how closely a measurement resembles the actual value.

Three categories of accuracy exist:

1) Point accuracy signifies that accuracy is present only at that scale point.

It provides no details regarding the instrument's accuracy.

2)Percentage of true value - The accuracy is assessed by identifying the instrument's accuracy and contrasting it with the true value that was measured.

3)Percentage of scale range – The accuracy is what determines the measurement's accuracy.

Up to 0.5 percent of instrument accuracy is disregarded. By taking multiple measurements and accounting for human error, measurement accuracy can be improved.

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Answer:

Catalysts play a significant role in transesterification of vegetable oils. ... Eggshell has a large amount of calcium carbonate that can be ...

‎Abstract · ‎Introduction · ‎Catalysis in transesterification · ‎Conclusion and prospects

Explanation:

The industrial production of biodiesel is catalyzed by calcium carbonate catalyst which increases the rate of reaction many folds. The cost of catalyzed reaction decreases as activation energy decreases.

Catalyst is a substance that enhance the rate of any chemical reaction without participating in the chemical reaction. Catalyst generally increases the rate of reaction by lowering the activation energy of that chemical reaction.

Biodiesel is formed by reaction of vegetable oil. For the conversion of vegetable oil to biodiesel oil we use calcium carbonate as catalyst.

As we said earlier that catalyst reduces activation energy that means requires less energy for conversion. So we need lower cost to provider lower energy. Hence use of catalyst reduces costs.

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The term mole concept is used here to determine the number of moles of water. The number of moles of water is 0.713.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles (n) = Given mass / Molar mass

Molar mass of HNO₃ = 63 g/mol

'n' of HNO₃ = 134.9 / 63 = 2.14 mole

'n' of H₂O generated = 'n' of HNO₃ consumed

= 2.14 mol × 2/6

= 0.713

So rounding to nearest 10 is 0.7.

Thus the number of moles of water is  0.7.

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One cubic centimeter of 7.15 g/cm³ will contain 9.2 x 10²² Cr atoms.

The density of Cr is 7.15 g/cm³.

It means, one cm³ contains 7.15 grams of Cr.

We know moles are given by,

n = mass/molar mass

n = number of atom/Avogadro number

Molar mass of Cr is 51 g/mol.

So, the number of atoms per cubic centimeter can be found as,

7.15/51 = Number of atom/6.603 x 10²³

Number of atoms = 9.2 x 10²²

So, one cubic centimeter will contain 9.2 x 10²² atoms of Cr.

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Answer:

Na

Explanation:

Answer:

It is Rb!!

for plato users

Answer: I assume you mean the atomic number.

The atomic number would be 31.

Answer:

No

Explanation:

In the hot pack, as the water reacts with the magnesium sulfate, the pack becomes bigger is not an indication that new atoms have been created or produced.

As with all chemical reactions, they all obey the law of conservation of matter which states that "in chemical reactions, matter is neither created nor destroyed but atoms simply recombine".

The reason why the hotpack becomes bigger is because the atoms gain more volume.

Answer: 33/ because 1/3 of a 11 is 33.

Explanation:

All you had to do was multiply 11 with 3 thats it.

Yes, 1-hexene exhibits cis/trans isomerism. 1-hexene is a type of aliphatic olefin, an unsaturated hydrocarbon

Isomerism refers to a phenomenon where two or more compounds have the same molecular formula but a different structure, resulting in different chemical and physical properties . Isomers may be classified into two types based on the arrangement of atoms within the molecule. They are as follows:      

Cis-isomers:  These isomers have the same functional groups on the same side of the molecule. They have lower boiling points and higher melting points compared to trans isomers.The term "cis" is Latin for "on the same side."

Trans-isomers:  These isomers have the same functional groups on opposite sides of the molecule. They have higher boiling points and lower melting points than cis isomers.The term "trans" is Latin for "across."

1-hexene is a type of aliphatic olefin, an unsaturated hydrocarbon. It is a six-carbon alkene that contains a double bond between carbon atoms one and two (1-hexene). The molecular formula of 1-hexene is C₆H₁₂. 1-hexene has two isomers - cis and trans.  Therefore, it displays cis/trans isomerism.

The hydrogen atoms are on the same side of the double bond. The hydrogen atoms are on opposite sides of the double bond.

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Approximately 13836 grams (or 13.8 kg) of liquid water is required to absorb 3.12×10^4 kJ of heat energy on boiling.

To find the mass of liquid water required to absorb 3.12×10^4 kJ of heat energy on boiling, we need to use the following formula:

q = m * ΔH

Where

The enthalpy of vaporization of water is 40.7 kJ/mol.

To convert kJ to J, we multiply by 1000:

q = 3.12×10^4 kJ = 3.12×10^7 J

Substituting the values, we get:

3.12×10^7 J = m * (40.7 kJ/mol)

To solve for the mass of water, we need to first convert the enthalpy of vaporization to J/g:

40.7 kJ/mol = 40.7×10^3 J/mol

The molar mass of water is 18.015 g/mol, so we can calculate the enthalpy of vaporization per gram:

40.7×10^3 J/mol / 18.015 g/mol = 2257 J/g

Substituting this value, we get:

3.12×10^7 J = m * (2257 J/g)

Solving for m, we get:

m = 3.12×10^7 J / (2257 J/g)

m ≈ 13836 g

Therefore, approximately 13836 grams (or 13.8 kg) of liquid water is required to absorb 3.12×10^4 kJ of heat energy on boiling.

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Answer:

1.20 mole

Explanation:

1 Mole of Cu reacts to form  =  1 Mole of Hg

(1.20 mol × 1 mol) ÷ 1 mol

1.20 mol of Hg

Answer:

The answer is increasing the distance between two objects decreases the gravitational force. which is C

Explanation:

Indeed, 13C NMR spectroscopy can be used to differentiate between borneol and isoborneol. Because the chemical structures of borneol and isoborneol differ.

A potent analytical method for examining the carbon nuclei in molecules is 13C NMR spectroscopy. It is based on the observation of the resonance frequencies of various carbon atoms within a molecule through the interaction of carbon-13 nuclei with an external magnetic field. The identification, quantification, and structural clarification of a wide variety of organic compounds are made possible by the information that 13C NMR spectra provide about the chemical environment and connectivity of carbon atoms in molecules. It has become a vital instrument for the characterisation of complex mixtures, natural products, and synthesised substances and is frequently utilised in disciplines including chemistry, biochemistry, and pharmacology.

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The new pressure will be : 25 atm

Boyle's Law  

At a constant temperature, the gas volume is inversely proportional to the pressure applied  

\(\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}\)

P₁=15 atm

V₁=5 L

V₂= 3 L

\(\tt P_2=\dfrac{P_1.V_1}{V_2}\\\\P_1=\dfrac{15~atm\times 5~L}{3~L}\\\\P_1=\boxed{\bold{25~atm}}\)

Answer:

The skillet got rusted.

Explanation:

In the context, Kelly kept the iron skillet in the sink which is full of water. After washing the dishes, she noticed the skillet's color is starting to change. She kept it for dry on the rack but the day later the skillet was ruined and damaged.

It was a chemical and physical change in the property of the metal where the iron skillet which was kept in the sink full of water oxidized due to the water content and the iron got oxidized to form form iron oxide which is known as rust. It damages the utensil and the color changes to muddy red or brownish red.

The percentage composition of aluminium sulfide can be calculated by determining the relative mass of each element in the compound and expressing it as a percentage of the total mass.

Aluminium sulfide has the chemical formula Al2S3, which means it contains 2 atoms of aluminium and 3 atoms of sulfur.

To calculate the percentage composition of aluminium sulfide, we need to first determine the atomic mass of each element. The atomic mass of aluminum is 26.98 g/mol, and the atomic mass of sulfur is 32.06 g/mol.

The total molar mass of aluminium sulfide can be calculated by adding the molar mass of aluminum (26.98 x 2 = 53.96) to the molar mass of sulfur (32.06 x 3 = 96.18), giving a total molar mass of 150.14 g/mol.

Next, we can calculate the percentage composition of each element by dividing its mass by the total molar mass and multiplying by 100.

For aluminum:
(53.96 g/mol ÷ 150.14 g/mol) x 100 = 35.94%

For sulfur:
(96.18 g/mol ÷ 150.14 g/mol) x 100 = 64.06%

Therefore, the percentage composition of aluminum sulfide is 35.94% aluminum and 64.06% sulfur.


Calculating the percentage composition of a compound involves determining the relative mass of each element in the compound and expressing it as a percentage of the total mass. In this case, we used the chemical formula for aluminum sulfide and the atomic masses of aluminum and sulfur to determine the total molar mass of the compound. We then divided the mass of each element by the total molar mass and multiplied by 100 to get the percentage composition. This calculation is useful in determining the properties and behavior of a compound, as well as in predicting the outcome of chemical reactions involving the compound.

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B is the answer ,ammonium accepts a proton and becomes ammonium ion

Answer:

In which organ would you expect the contents of food to be more ground up? (Gizzard)

These external structures are the penis, scrotum, epididymis, and testes. The internal organs of the male reproductive system are called accessory organs. ... To discharge sperm within the female reproductive tract.

Answer:

Explanation:

Titration: titrate twice, the first time with an indicator to determine how much sodium hydroxide is needed to completely react with hydrochloric acid, and the second time without an indicator to prevent the contamination of the sodium chloride salt produced

arts Per Thousand ... Click advance year 10 times. ... Which organism was most hurt by increased storms, and why do you think this is so? ... On the Coral Reef tab I see less fish and on the Data tab I see Staghorn Coral has majorly decreased. ... B. How does this change the populations of the two species that eat algae, ...

Answer:

increase: yellow tail snapper

decrease: grouper, parrotfish, angelfish

Explanation:

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

Action potentials are self-regenerating