20.1 cm3 of metal hydroxide (MOH) containing 4.8 g/dm3 react Completely with 23.0 cm3 of the HCL and Containing 3.8g/dm3. Identify the metal of M of MOH
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Answer:

An atom contains three basic particles namely protons, neutrons and electrons. The nucleus of the atom contains protons and neutrons where protons are positively charged and neutrons are neutral. The electrons are located at the outermost regions called the electron shell.

Answer:

Which set of orbitals are degenerate?

Degenerate is used in quantum mechanics to mean 'of equal energy. ' It usually refers to electron energy levels or sublevels. For example, orbitals in the 2p sublevel are degenerate - in other words the 2px, 2py, and 2pz orbitals are equal in energy, as shown in the diagram.

Explanation:

Answer:

Electron orbitals having the same energy levels are called degenerate orbitals, For example, orbitals in the 2p sublevel are degenerate - in other words the 2px, 2py, and 2pz orbitals are equal in energy.

Answer:it will slow and stop

Explanation:

4) The compounds as they have been shown are diastereomers

5) The compounds as they have been shown are enantiomers

6) The charges on the cyanide carbon and the bromine ion are negative , negative

We know that the optical isomers are the compounds that are mirror images of each other. These images could be super impossible or non super imposible. When the compounds are non super impossible images we call them enantiomers but is they are super impossible mirror images we call them diastereomers.

Recall that both diastereomers and enantiomers are all kinds of stereoisomers. These are isomers that have the same molecular formula but different arrangement of the atoms in space.

Thus we could have enantiomers when we have mirror images and diastereomers when we do not have mirror images.

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The formula for Co3+ is Co3+ because it represents the ion of cobalt that has lost three electrons, leaving it with a 3+ charge.

What is chemical formula and how they are formed ?

A chemical formula is a symbolic representation of a chemical compound that shows the types of elements present in the compound and the relative number of atoms of each element. For example, the chemical formula for water is H2O, which indicates that it is made up of two hydrogen atoms and one oxygen atom.

Chemical formulas are formed by identifying the elements that make up a compound and determining the relative number of each element in the compound. The number of each element is represented by a subscript following the chemical symbol of the element. For example, the chemical formula for methane is CH4, which indicates that there is one carbon atom and four hydrogen atoms in each molecule of methane.

The formula for Se2- is Se2- because it represents the ion of selenium that has gained two electrons, giving it a 2- charge.

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Answer:

E) Silver, mass = 420 g, d = 10.5 g/cm.

Explanation:

Hello,

In this case, since the density is defined by:

\(\rho =\frac{m}{V}\)

Given the mass and density, we compute the volume via:

\(V=\rho *m\)

Thus, for each vase we have:

A) \(V=135g*2.7g/cm^3=364.5cm^3\)

B) \(V=305g*8.92g/cm^3=2720.6cm^3\)

C) \(V=240g*7.86g/cm^3=1886.4cm^3\)

D) \(V=75g*1.74g/cm^3=130.5cm^3\)

E) \(V=420g*10.5g/cm^3=4410cm^3\)

In such a way, the largest volume corresponds to E) Silver, mass = 420 g, d = 10.5 g/cm.

Best regards.

In 4.38 × 10^21 molecules of water, there are approximately 0.073 moles.

To calculate the number of moles, we can use Avogadro's number, which states that 1 mole of a substance contains 6.022 × 10^23 molecules. So, by dividing the given number of molecules (4.38 × 10^21) by Avogadro's number, we can find the number of moles.

Now, let's explain the process in detail. Avogadro's number is a constant that represents the number of particles (atoms, molecules, etc.) in one mole of a substance. It is approximately 6.022 × 10^23. Therefore, if we divide the given number of molecules by Avogadro's number, we can determine the number of moles.

In this case, we divide 4.38 × 10^21 molecules by 6.022 × 10^23 molecules/mole, resulting in approximately 0.073 moles.

Significant figures play an important role in reporting the answer. The given number of molecules has three significant figures (4, 3, and 8), so our answer should be reported with three significant figures as well. Therefore, the number of moles is approximately 0.073.

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By the concept of calculating moles ,it can br concluded that the no. of atoms of phosphorus in 8.80mol of copper(II) phosphate is=1.06\(x10^{25}\)

A mole is defined as amount of substance containing as many as elementary entities that are there in atoms of exactly 12 g of carbon-12.Therefore we can say,1 mole of copper(II) phosphate, Cu3(PO4)2, contains three moles of copper(II) cations and two moles of phosphate anions.

Again 1mole of phosphate anions contains one mole of phosphorus and four moles of oxygen.Considering all these informations we can conclude that:1 mole of copper(II) phosphate contains 2 moles of Phosphorus

Accordingle the sample contains=(8.80\(x\)2) moles of Phosphorus

                                    =(17.6\(x\)Avogadro's constant) atoms of  Phosphorus

                                    =(17.6\(x\)6.022\(x\)\(10^{23}\)) atoms of  Phosphorus

                                    =1.06\(x10^{25}\) [approx] no. of Phosphorus atoms

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In 8.80 moles of copper(II) phosphate, there are approximately 1.06 x 10²⁵ atoms of phosphorus.

The number of atoms of phosphorus in a given amount of a compound can be calculated using the concept of mole in chemistry. Copper(II) phosphate is Cu3(PO4)2, containing 2 moles of phosphorus (P) for every 1 mole of the compound. Avogadro's number (6.022 x 10²³) gives the number of atoms in one mole.

So, if there are 8.80 moles of copper(II) phosphate, there would be 2 × 8.80 moles of phosphorus. Multiplying this by Avogadro's number gives the total number of phosphorus atoms.

Therefore, the number of phosphorus atoms is 2 × 8.80 × 6.022 x 10²³ = 1.06 x 10²⁵ atoms of phosphorus.

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The Medal of Honor is the best navy decoration and highest volume.

The President of the USA The Victoria go is the holy grail for Medal of Honor creditors because there are the best in lifestyles. Bearing the inscription For valor and called a VC, this medal turned into first offered for conspicuous bravery' in 1856 and later backdated to the Crimean conflict of 1854. The outstanding service pass is the second maximum army ornament that may be provided to a member of the American military, for intense gallantry and risk of lifestyle in actual combat with an armed enemy force.

The Bronze Star Medal dates lower back to world battle II. these days, it is the fourth-maximum ranking award a provider member can obtain for a heroic and meritorious deed performed in an armed battle. For individuals who acquire the BSM, it's far a sign of their sacrifice, bravery, and honor at the same time as serving their us of a

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17.8 g of sodium perchlorate contains 8.73 × 10²² Na⁺ ions, 8.73 × 10²² ClO₄⁻ ions, 8.73 × 10²² Cl atoms and 3.49 × 10²³ O atoms.

First, we will convert 17.8 g of NaClO₄ to moles using its molar mass (122.44 g/mol).

\(17.8 g \times \frac{1mol}{122.44g} = 0.145 mol\)

Next, we will convert 0.145 moles to molecules of NaClO₄ using Avogadro's number; there are 6.02 × 10²³ molecules in 1 mole of molecules.

\(0.145 mol \times \frac{6.02 \times 10^{23}molecules }{mol} = 8.73 \times 10^{22}molecules\)

NaClO₄ is a strong electrolyte that dissociates according to the following equation.

NaClO₄ ⇒ Na⁺ + ClO₄⁻

The molar ratio of NaClO₄ to Na⁺ is 1:1. The number of Na⁺ in 8.73 × 10²² molecules of NaClO₄ is:

\(8.73 \times 10^{22}moleculeNaClO_4 \times \frac{1 ion Na^{+} }{1moleculeNaClO_4} = 8.73 \times 10^{22}ion Na^{+}\)

The molar ratio of NaClO₄ to ClO₄⁻ is 1:1. The number of ClO₄⁻ in 8.73 × 10²² molecules of NaClO₄ is:

\(8.73 \times 10^{22}moleculeNaClO_4 \times \frac{1 ion ClO_4^{-} }{1moleculeNaClO_4} = 8.73 \times 10^{22}ion ClO_4^{-}\)

The molar ratio of ClO₄⁻ to Cl is 1:1. The number of Cl in 8.73 × 10²² ions of ClO₄⁻ is:

\(8.73 \times 10^{22}ion ClO_4^{-} \times \frac{1 atomCl }{1ion ClO_4^{-}} = 8.73 \times 10^{22}atom Cl\)

The molar ratio of ClO₄⁻ to O is 1:1. The number of O in 8.73 × 10²² ions of ClO₄⁻ is:

\(8.73 \times 10^{22}ion ClO_4^{-} \times \frac{4 atomO }{1ion ClO_4^{-}} = 3.49 \times 10^{23}atom O\)

17.8 g of sodium perchlorate contains 8.73 × 10²² Na⁺ ions, 8.73 × 10²² ClO₄⁻ ions, 8.73 × 10²² Cl atoms and 3.49 × 10²³ O atoms.

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7.11 × 10⁻⁴ is the solubility (in M) of PbCl\(_2\) in a 0.15 M solution of HCl. The Ksp of PbCl\(_2\) is 1.6 x 10⁻⁵.

The capability of a material, the solute, to combine with another material, the solvent, is known as solubility in chemistry. Insolubility, or the solute's inability to create such a solution, is the opposite attribute.

The amount of each of the solute within a saturated solution—a solution whereby no more solute is able to be dissolved—is typically used to gauge the degree of a substance's solubility in a particular solvent.

PbCl\(_2\) ⇌ Pb\(_2\)⁺(x) + 2Cl⁻ (2x)

HCl ⇌H⁺ (0.15M) + Cl⁻ (0.15M)

Ksp = {Pb\(_2\)⁺} {Cl⁻}²

Ksp = {x} {2x+ 0.15}²

2x<0.15

Ksp = {x} {0.15}²

x = 7.11 × 10⁻⁴

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Answer:

Na3N

Explanation:

cuzdoodlikeimsosure

1.506 × 10²³ molecules in  120.0 g of oxygen gas.

The slightest particle of importance contains all of the physical and chemical properties of that substance. Molecules are made up of one or more atoms.

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Answer:

solar flair I think I'm not sure

A process needs a negative change in free energy to be spontaneous. The relationship between the changes in enthalpy and entropy and the change in free energy is explained.

Whereas delta G° refers to the standard Gibbs free energy under standard conditions, delta G alone refers to the change in Gibbs free energy under specific conditions.

Declining energy and rising entropy interact to form combustion processes, which are what spontaneous reactions are. The reaction is random if the Gibbs Free Energy is negative; it is non-spontaneous if it is positive.

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A container with a volume of nitrogen gas is filled to 1.50 atm of pressure and 23°C of temperature. Compute the amount of gas in moles led with as at 2.91 moles is 18.87 liters.

The three gas laws that make up the combined gas law, also known as a general gas equation, are Charle's law, Boyle's law, and Gay-Lussac law. The law shows the link between temperature, volume, and pressure for a given amount of gas.

PR/T=V

V= 2.91×150/23

V=18.87liters

According to Boyle's Law, gas volume increases as pressure lowers. Charles' Law states that a gas expands as its temperature rises. Also, according to Avogadro's Law, a gas's volume increases as its concentration does.

Either the total amount of gaseous substance or the number of gas moles.

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Types of luminous flames:

1. Yellow Luminous Flame

2. Smoky Luminous Flame

3. Orange Luminous Flame

4. Blue Luminous Flame

Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:

1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.

2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.

3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.

4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.

It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.

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Answer:

B) increases

higher temperature = higher pressure

The molarity of the solution if 3.2 moles of MgCl, are dissolved in 1.3 liters of water is 2.46 M.

The molarity of a solution is the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.

The molarity of a solution can be calculated by dividing the number of moles in the substance by its volume as follows:

molarity = no of moles ÷ volume

According to this question, 3.2 moles of MgCl, are dissolved in 1.3 liters of water. The molarity is as follows:

Molarity = 3.2mol ÷ 1.3L

Molarity = 2.46 M

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The Chemical Abstract Service registry number (CAS number) is unique.

What is meant by  Chemical?

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Answer:

The air warms up, causing it to become lighter than the cold air outside of it.

An acetate buffer would be most effective in maintaining pH within a range of approximately 3.76 to 5.76.

The pH range over which an acetate buffer can effectively maintain pH depends on the pKa of the acid used and the concentration ratio of the acid to its conjugate base (acetate ion). Acetate buffer solutions are commonly prepared using acetic acid (CH3COOH) and sodium acetate (CH3COONa).

The pKa of acetic acid is approximately 4.76. In general, a buffer is most effective when the pH is within one unit of its pKa. Therefore, an acetate buffer would be most effective in maintaining pH within a range of approximately 3.76 to 5.76

Outside this pH range, the buffer may not effectively resist changes in pH, as the concentration of the acid and its conjugate base will be significantly imbalanced. At lower pH values, the acid concentration will dominate, while at higher pH values, the concentration of the acetate ion will dominate, leading to a diminished buffering capacity.

However, it's important to note that the exact pH range over which an acetate buffer can maintain pH effectively may vary depending on the specific concentration and preparation of the buffer solution.

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Answer:

Protegerte Freddy Gerrard Reverte Freddy Buffett irrefutables

Explanation:

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Answer:

The answer is "Option b and Option c".

Explanation:

This buffer is a buffer of ammonia and ammonium ion. Thus it requires the solution \(NH_3 \ \ and \ \ NH_4^{+}\).

In point 1:

The solution containing \(NH_3 \ \ and \ \ NH_4^{+}\) at 1M concentration would be given by mixing the two solutions. Thus, this buffer is a legitimate route.

In point 2:

It gives the ions you want but they are not the same.

In point 3:

\(1 M\) \(NH_3\) and \(1 M\)\(HCl\) volume would not produce the same \(NH_3 \ \ and \ \ NH_4^{+}\) concentrations. Therefore, this buffer isn't a valid route.

In point 4:

Some \(1 M\) \(NH_3\) volume and half \(HCl\) . This offers the same rate as half.

Answer: A

Explanation:

The mass of water produced when 6.26g of butane reacts with excess of oxygen will be 9.78g.

According to given question, the reaction would be:

C₄H₁₀ + 13/2O₂ --- 4CO₂ + 5H₂O

6.26g 0 0

As we know,

(mole of C₄H₁₀)÷coefficient = (mole of H₂O)÷coefficient

6.26/molecular weight ÷ 1 = mass of H₂O/molecular weight ÷ 5

6.26÷58 = Mass of H₂O/18×5

Mass of H₂O = 9.78g

Therefore, the mass of water produced when 6.26gram of butane reacts in the presence of excess of oxygen will be 9.78gram.

The combustion of butane is a reaction between butane and oxygen gas that leads to the production of carbon dioxide gas and water. This hydrocarbon combustion reaction releases heat energy and is an example of an exothermic reaction.

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Answer:

During the early Paleozoic Era, the Earth's surface was very different from what it is today. The continents were arranged differently, forming one large supercontinent called Pangea. This landmass was surrounded by a single large ocean called Panthalassa. The climate was much warmer and wetter than it is today, with no ice caps at the poles.

The first land plants, known as bryophytes, appeared during the early Silurian Period, around 430 million years ago. These plants were small and simple, lacking roots and vascular tissue. They grew in damp environments, such as along the edges of lakes and streams. They were important in the development of soils and in the colonization of land by other organisms, such as insects and other arthropods.

From the calculations and results obtained, the pH of the solution is 12.85. This implies that the solution is basic or we can say it is alkaline.

pH is a scale that shows the acidity or alkalinity of a solution.

Number of moles of hydrogen cyanide =  0.410 M *  16.8 /1000 L = 0.0069 moles

Number of moles of NaOH = 0.408 M  * 25.3/1000 L = 0.01 moles

Since the reaction is 1:1, hydrogen cyanide is the limiting reactant.

Number of moles of NaOH left over = 0.01 moles - 0.0069 moles  

= 0.0031 moles

Total volume = 16.8 mL + 25.3 mL = 42.1 mL  or 0.042 L

Molarity of left over hydroxide ions = 0.0031 moles /0.042 L

= 0.07 M

pOH = - log(0.07 M) = 1.15

pH = 14 - 1.15 = 12.85

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