For a substance to change from a gas to a liquid the particles must _____

Answer:

Ice carving. It's still ice, it's not water, and it changes shape while not changing it's matter

Explanation:

To solve this problem, we need to use the formula: moles of electrons = (current × time) / (charge of one electron × Faraday's constant). So, approximately 7.46 × 10^-4 mol of electrons travel through the copper wire during the 118 seconds.

First, let's convert the current to units of Amperes:
610. mA = 0.610 A
Next, we need to know the charge of one electron, which is -1.602 × 10^-19 Coulombs.
Finally, we need to know Faraday's constant, which is 96,485 Coulombs per mole of electrons.
Now, we can plug in the values and solve for moles of electrons:
moles of electrons = (0.610 A × 118 s) / (-1.602 × 10^-19 C × 96,485 C/mol)
moles of electrons = 4.48 × 10^18
Be sure to round your answer to three significant digits and include the correct unit symbol for moles of electrons, which is "mol e^-":
moles of electrons = 4.48 × 10^18 mol e^-

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The space left by the free electron in an atom after it has lost one electron is known as a hole.

The term "free electron" refers to an electron that has broken loose from its "parent" atom and is now free to move about the material at random. A vacancy, also known as a hole, is created in the atom when a bonded electron in a lattice atom breaks free. The number of electrons in an atom's valence shell, or n shell in this example, has a significant impact on the electrical properties of the element that the atom represents. The least force of attraction is felt by the electrons in the valence shell since they are the furthest from their nucleus.

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The pH of the solution will be 10.47.

The pH of a solution is mathematically given as:

 pH = - log [\(H^+\)] of -log [\(H_3O^+\)]

Thus, in this case, with  [\(H_3O^+\)]  of 3.4 x 10-¹¹ M:

pH = -log 3.4 x \(10^-^1^1\) = 10.47

Thus, the pH of the solution will be 10.47.

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Answer:

\(\huge\boxed{\sf 3 \ electrons}\)

Explanation:

\(1s^22s^22p^1\)

The outermost/valence shell is the second one, seeing from the electronic configuration.

= 2 + 1 = 3 (electrons are raised to the power in the electronic configuration)

Since, the valence shell here is 2, the electrons of second shell will be counted as valence electrons.

\(\rule[225]{225}{2}\)

Answer:

Molecular Formula  C5H8

Explanation:

The best electrode for saltwater batteries that will not corrode easily is copper and zinc.

The values of half-cell potentials are used to make the electrodes that do not corrode easily. If the salt concentrations at the two electrodes were different, you could still get voltage and current from a cell even if the anode and cathode were formed of the same metal.

Due to its high efficiency and suitability for seawater, copper is frequently employed as the cathode in galvanic cells. Additionally, in a seawater battery, zinc and aluminum can function as inert anodes and produce large levels of electricity.

A liquid saltwater solution is used in saltwater batteries to collect, store, and finally release energy. Copper and zinc are frequently utilized as the cathode in galvanic cells due to their high efficiency and suitability for seawater.

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70.9-gram sample of \(Cl_{2}\) gas will occupy Opton C. 22.4 liters at STP.

To determine the volume occupied by the sample of \(Cl_{2}\) (g) at STP, we can use the ideal gas law equation, PV = nRT

where P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature.

At STP (Standard Temperature and Pressure), the pressure is 1 atmosphere (atm) and the temperature is 273.15 Kelvin (K).

First, calculate the number of moles of \(Cl_{2}\) (g) using its molar mass. The molar mass  \(Cl_{2}\) is 70.9 grams/mol.

Number of moles (n) = mass (m) / molar mass (M)

n = 70.9 g / 70.9 g/mol

n = 1 mol

Now, we can calculate the volume using the ideal gas law:

V = (nRT) / P

V = (1 mol * 0.0821 L·atm/mol·K * 273.15 K) / 1 atm

V ≈ 22.4 L

Therefore, the correct answer is C. 22.4 L.

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1. To determine the number of moles of NaClO₃ required to produce 61 moles of O₂, we can use the stoichiometric ratio between NaClO₃ and O₂.

From the balanced chemical equation, we see that 2 moles of NaClO₃ produce 3 moles of O₂. Therefore, we can set up the following proportion:

2 moles NaClO₃ / 3 moles O₂ = x moles NaClO₃ / 61 moles O₂

Solving for x, we get:

x = (2/3) × (61 moles O₂) / (1 mole NaClO₃) ≈ 41 moles NaClO₃

Therefore, approximately 41 moles of NaClO₃ are needed to produce 61 moles of O₂.

2. From the balanced chemical equation, we see that 3 moles of Cu react with 8 moles of HNO₃ to produce 2 moles of NO. Therefore, we can set up the following proportion:

3 moles Cu / 8 moles HNO₃ = 2 moles NO / x moles HNO₃

Solving for x, we get:

x = (8/3) × (2 moles NO) / (1 mole Cu) ≈ 5.3 moles HNO₃

Therefore, 5.3 moles of HNO₃ are needed to produce 2 moles of NO. If 26 moles of HNO₃ are consumed, we can calculate the moles of NO produced using a proportion:

3. 5.3 moles HNO₃ / 2 moles NO = 26 moles HNO₃ / y moles NO

Solving for y, we get:

y = (2/5.3) × (26 moles HNO₃) / (1 mole NO) ≈ 9.8 moles NO

Therefore, approximately 9.8 moles of NO can be produced when 26 moles of HNO₃ are consumed.

4. From the balanced chemical equation, we see that 8 moles of HNO₃ react with 4 moles of H₂O. Therefore, we can set up the following proportion:

8 moles HNO₃ / 4 moles H₂O = 75 moles HNO₃ / x moles H₂O

Solving for x, we get:

x = (4/8) × (75 moles HNO₃) / (1 mole H2O) = 37.5 moles H₂O

Therefore, 37.5 moles of H₂O can be produced when 75 moles of HNO₃ are consumed.

5. From the balanced chemical equation, we see that 2 moles of NaClO₃ produce 3 moles of O₂. Therefore, we can set up the following proportion:

2 moles NaClO₃ / 3 moles O₂ = 9 moles NaClO₃ / x moles O₂

Solving for x, we get:

x = (3/2) × (9 moles NaClO₃) / (1 mole O₂) = 13.5 moles O₂

Therefore, approximately 14 moles of O₂ are produced when 9 moles of NaClO₃ are used.

6. The stoichiometric ratio between C and CH₄ from the balanced chemical equation is 1:1. This means that 1 mole of carbon is required to produce 1 mole of methane.

Therefore, we can use the following proportion:

1 mole C / 1 mole CH₄

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Answer:

The correct answer is B. Cs+ represents a cesium ion.

2.083 Liters of 6.0 M solution sulfuric acid is required. This solved using molecular calculations and Titration.

Solution: \(2Al(s)+3H_2SO_4(aq) = Al_2(SO_4)_3(aq)+3H_2(g)\)

Moles of hydrogen gas =  \(\frac{25}{2} = 12.5 mol\)

Then 12.5 moles of hydrogen will be obtained from Moles of Sulfuric acid = 12.5 mol

Molarity of the sulfuric acid solution = 6.0 M = 6 mol/ l

6M = \(\frac{12.5 mole}{V}\)

where V is the volume needed

\(V = \frac{12.5}{6}\)

V = 2.083 l

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The statement " nutrition is the acquisition of chemical substances by organisms for use as an energy source or as building blocks of cellular structures" is true.

Nutrition is indeed the acquisition of chemical substances by organisms for use as an energy source or as building blocks of cellular structures. Organisms require various nutrients, including carbohydrates, proteins, fats, vitamins, minerals, and water, to carry out their metabolic processes, maintain growth and development, and support overall health and well-being.

These chemical substances obtained through nutrition are utilized by organisms to provide energy for cellular processes, such as respiration, synthesis of biomolecules, and movement. They also serve as building blocks for the construction and repair of cellular structures, including proteins, nucleic acids, lipids, and carbohydrates.

Nutrition is a fundamental process that ensures the availability of essential nutrients for organisms to carry out their life functions effectively. Different organisms have varied nutritional requirements depending on their specific metabolic needs, lifestyles, and physiological characteristics.

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The statement that is not true about proteins is "Proteins are naturally acidic." Option C is correct.

Proteins are biological macromolecules made up of long chains of amino acids. They are also referred to as polypeptides because they are composed of multiple peptide bonds between the amino acids. The specific sequence and arrangement of amino acids in the polypeptide chain determine the unique 3D structure and function of the protein.

Proteins can have a structure characterized by loops, bends, and twists, and this structure is held together by a variety of intermolecular interactions, including hydrogen bonds, disulfide bonds, electrostatic interactions, and van der Waals forces.

While some amino acids have acidic or basic side chains, proteins as a whole are not necessarily naturally acidic. The overall charge of a protein is dependent on the charge of its constituent amino acids and the pH of the surrounding environment.

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--The given question is incomplete, the complete question is

"All of the following statements are true about proteins except. -Proteins can have a structure characterized by loops, bend, and twists. A) Proteins are composed of amino acids. B) Proteins are polypeptides C) Proteins are naturally acidic. D) Hydrogen bonds keep the protein together"--

Answer:

they have same atomic number as they are the same element & electrons

Answer: they both have the atomic (proton number) as they are the same element hence they also they have the same number of electrons. Therefore they have similar chemical properties, as the electrons determine the chemical property of an element.

Explanation: The numbers 35 and 37 are the mass numbers for the two isotopes of chlorine. They both have the same atomic number (proton number ) as they are the same

The comparison between the class barometer data and the air pressure shown in the weather report serves as a means to evaluate the accuracy and effectiveness of the barometer's measurements.

The comparison between the data from the class barometer and the air pressure shown in the weather report revealed a correlation between the two measurements. The class barometer readings were likely taken at the same time as the weather report's air pressure measurement to ensure accurate comparison.

If the class barometer readings closely matched the air pressure indicated in the weather report, it would suggest that the barometer was functioning correctly and providing reliable measurements. This would indicate that the class barometer could be used as a reliable tool for monitoring air pressure changes.

However, if there were significant discrepancies between the class barometer readings and the air pressure reported in the weather report, it could indicate a calibration issue with the barometer or potential inaccuracies in its measurements. In such a case, it would be necessary to investigate the reasons behind the discrepancies and determine the reliability of the class barometer for future use. It helps to determine the barometer's reliability as a tool for monitoring air pressure changes in the local environment.

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Answer

(d) i, ii, iii, iv

Explanation

A large Ka value indicates a strong acid because it means the acid is largely dissociated into its ions. A large Ka value also means the formation of products in the reaction is favored. A small Ka value means little of the acid dissociates, so you have a weak acid.

In addition, the smaller the pKa value, the stronger the acid.

Note: pKa = - log ka

To arrange the following according to increasing acid strength, first, convert the Ka to pKa using the formula above.

(i) Ka= 2.5 + 10⁻¹⁵

pKa = - (log 2.5 + log 10⁻¹⁵)

pKa = -(0.40 - 15)

pKa = -0.40 + 15 = 14.6

(ii) Ka= 9.0 + 10⁻⁹

pKa = - (log 9.0 + log 10⁻⁹)

pKa -(0.95 - 9)

pKa = -0.95 + 9 = 8.05

(iii) pKa = 7.5

(iv) % dissociation = 100

This implies the acid dissociates completely in water. Strong acids have a large dissociation constant, so they dissociate completely in water.

The smaller the pKa value, the stronger the acid.

Therefore the arrangement of the above according to increasing acid strength is:

(d) i, ii, iii, iv

Answer:

The atoms are vibrating in place.

Explanation:

One of the properties of an ionic substance is the possession of a crystalline structure. As Gerry observed the salt under a microscope, he discovered that it has a crystalline structure. Crystalline salts are all ionic in nature, hence the salt observed by Gerry is an ionic salt.

Solids containing a definite crystalline structure always has their particles vibrating in place. This is immediately evident as Gerry looks at the salt through a microscope.

Answer:

D.The atoms are vibrating in place

Explanation:

Answer: its c

Explanation:

its c

Answer: Its c the answer is C like abc its the c one there you go hope this helps:

The number of aluminum produced from 1950 kg of Al₂O₃ is 3120 kg, The balanced equation for the reaction of alumina (Al₂O₃) with carbon can be written as 2Al₂O₃ + 3C → 4Al + 3CO.

To calculate the amount of aluminum produced from 1950 kg of Al₂O₃, we need to use the stoichiometric coefficients from the balanced equation. From the balanced equation, we can see that 2 moles of Al₂O₃ react to produce 4 moles of Al. We also know that the molar mass of Al₂O₃ is 101.96 g/mol.

First, we convert the given mass of Al₂O₃ to moles:

1950 kg Al₂O₃ × (1000 g / 1 kg) ÷ (101.96 g/mol) = 19.08 mol Al₂O₃

Using the stoichiometric ratios, we can determine the number of moles of Al produced:

19.08 mol Al₂O₃ × (4 mol Al / 2 mol Al₂O₃) = 38.16 mol Al

Finally, we convert the moles of Al to kilograms:

38.16 mol Al × (26.98 g/mol) ÷ (1000 g / 1 kg) = 1.0312 kg Al ≈ 3120 kg Al

For the second part, the balanced equation for the reaction of oxygen (O₂) with carbon (C) to produce carbon monoxide (CO) is:

C + O₂ → CO

Since we have 3 moles of oxygen produced for every 2 moles of Al₂O₃ consumed, and the stoichiometric ratio between oxygen and carbon monoxide is 1:1, the amount of carbon monoxide produced is also 3 moles.

Therefore, from the given amount of alumina in part 1, the amount of CO produced is approximately 3 moles.

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Answer:

hi

Explanation:

Explanation:

We are given: volume of alcohol = 17.4mL

: volume of solution = 131mL

Answer:

Percent by volume is 13.28%.

Formaldehyde is a substance made up of Carbon, Nitrogen, and Oxygen different types of atoms that are chemically combined in a fixed ratio of 1: 2:1. It is classified as an aldehyde.

This refers to a naturally occurring organic compound with the formula CH2O and structure H−CHO. It is also called methanal. The pure compound is a pungent, colorless gas such that it polymerizes spontaneously into paraformaldehyde. It can be stored as an aqueous solution that is formalin. This is also used to store animal specimens.

Formaldehyde is an organic compound. It contains a carbon atom present in its chemical formula. It is also classified as an aldehyde. Formaldehyde(RC=OH) contains a formyl group  and an R group, which is a group that contains carbon and/or hydrogen.

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The systematic (IUPAC) name for compound A is 4-butyl-5-fluoro-2-methyloctane, for compound B is 6-fluoro-5-isobutylnonane, for compound C is 4-(1-fluorobutyl)-2-methyloctane, and for compound D is 4-fluoro-5-isobutylnonane. Here option D is the correct answer.

The International Union of Pure and Applied Chemistry (IUPAC) has developed a systematic naming system to provide unambiguous and standardized names for chemical compounds. Using this system, the IUPAC name for each compound given in the question can be determined as follows:

A - 4-butyl-5-fluoro-2-methyl octane

This compound has a straight chain of eight carbon atoms, with a methyl group attached to the second carbon atom and a fluorine atom attached to the fifth carbon atom. The butyl group is attached to the fourth carbon atom, giving the name 4-butyl. Therefore, the systematic name of this compound is 4-butyl-5-fluoro-2-methyloctane.

B - 6-fluoro-5-isobutylnonane

This compound has a straight chain of nine carbon atoms, with a fluorine atom attached to the sixth carbon atom. The isobutyl group is attached to the fifth carbon atom, giving the name 5-isobutyl. Therefore, the systematic name of this compound is 6-fluoro-5-isobutylnonane.

C - 4-(1-fluorobutyl)-2-methyloctane

This compound has a straight chain of eight carbon atoms, with a methyl group attached to the second carbon atom. The fluorine atom is attached to the first carbon atom of a four-carbon chain, which is attached to the fourth carbon atom of the eight-carbon chain, giving the name 4-(1-fluorobutyl). Therefore, the systematic name of this compound is 4-(1-fluorobutyl)-2-methyloctane.

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Complete question:

What is the systematic (IUPAC) name of this compound? Hints

A - 4-butyl-5-fluoro-2-methyloctane

B - 6-fluoro-5-isobutylnonane

C - 4-(1-fluorobutyl)-2-methyloctane

D - 4-fluoro-5-isobutylnonane

Answer:

nuclear fusion

Explanation:

mark me brainliest please.

Answer:

B.) Nuclear fusion

Explanation:

Answer: 2,090J

The equation to find the specific heat is determined by the equation q = mcΔT, where q = total heat, m=mass, c = specific heat, and ∆T change in temperature.

Recall that the specific heat capacity for water is 4.18J/gºC

So, plug this along with your specific values into the equation.

q = 100g * (4.18J/gºC) * (20.0ºC-15.0ºC)
q = 2090J

Answer:

The carbon anode

Explanation:

The carbon anode is continually replaced because it burns off as carbon IV oxide gas by reacting with the oxygen had produced at the anode.

Answer:

Rule 1: Drop mono for the first element. Rule 2: Drop all prefixes if the first element is H. Rule 3: Drop the second o in mono prior to a vowel. Rule 4: Drop the a in prefixes ending in a prior to a vowel.