In the aufbau order of occupancy of electronic energy levels, the level occupied just after 5p is:.

The new tableau is:
⎣
⎡
​
P
0
0
1
​
0
​
1
3/2
​
0
​
0
​
2
2
−2
​
1
​
0
​
1/2
​
0
​
RHS
300
360
−120
​
​
⎦
⎤

a) To determine the pivot column and pivot element, we look for the most negative number in the bottom row of the tableau. In this case, the most negative number is -2 in the column x2. So, the pivot column is x2 and the pivot element is -2.

To convert the pivot element to 1 and the other numbers in the pivot column to 0, perform the necessary row operations. Divide the pivot row (row 2) by -2, so that the pivot element becomes 1. Then, perform row operations to make the other numbers in the pivot column 0. Subtract 2 times row 2 from row 1 to make the number in the pivot column (x1) 0. Subtract -1 times row 2 from row 3 to make the number in the pivot column (s1) 0. Subtract -2 times row 2 from row 4 to make the number in the pivot column (s2) 0.

The new tableau is:
⎣
⎡
​
P
0
0
1
​
0
​
1
3/2
​
0
​
0
​
2
2
−2
​
1
​
0
​
1/2
​
0
​
RHS
300
360
−120
​
​
⎦
⎤
​


b) Given the new tableau, the three possible interpretations are:
1. Enter solved if you think you have obtained the final tableau.
2. Enter ready for another set of pivot operations if you think more pivot operations are possible.
3. Enter no solution if you think the tableau has no solution.

Please choose the correct interpretation based on the given information.

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The pivot column is the column that contains the smallest positive number in the rightmost column. In this case, the pivot column is the second column, which corresponds to variable x2.

The pivot element is the number in the pivot column that is in the same row as the smallest positive number in the rightmost column. In this case, the pivot element is -2, located in the second row of the pivot column.

To convert the pivot element into 1 and the other numbers in the pivot column to 0, we perform row operations.

First, we divide the entire second row by -2 to make the pivot element 1:

P
0
01
​
x
1
11
3
−1
​
x
2
12
2
−2
​
s
1
10
0
​
s
2
01
0
​
RHS
300
480
0


Next, we subtract 3 times the second row from the first row to make the other number in the pivot column 0:


P
01
01
​
x
11
12
2
−2
​
s
10
0
​
s
01
0
​
RHS
480
0
0
​

Finally, we subtract 2 times the second row from the third row to make the other number in the pivot column 0:

P
01
01
​
x
11
12
2
−2
​
s
10
0

s
01
0​
RHS
480
0
−960


After performing the necessary row operations, we have obtained the new tableau. Now let's look at the numbers in the objective row (the bottom row):

Under column x1 in the objective row, you have: 1
Under column x2 in the objective row, you have: -2
Under column s1 in the objective row, you have: 0
Under column s2 in the objective row, you have: 0
Under column RHS in the objective row, you have: -960

For part b, based on the new tableau obtained, the correct choice is "2. Enter ready for another set of pivot operations" because more pivot operations are possible.

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The pOH of this solution is 0.3 and the pH of the solution is 13.3 .

What is pH ?

The pH of a food is a direct function of the free hydrogen ions present in that food. Acids in food release free hydrogen ions. Hydrogen ions give acidic foods their characteristic sour taste. Therefore, pH can be defined as a measure of free acid. More specifically, pH is defined as the negative logarithm of hydrogen ion concentration. The pH range is 0 to 14. The pH of pure water is exactly 7, so pH 7 is neutral. Values ​​less than 7 are acidic. Values ​​above 7 are basic or basic.

Foods are generally classified as “acidic foods” (low pH, pH 4.6 or less) or “weakly acidic foods” (high pH, ​​pH 4.6 or higher). Safe food storage is determined by the pH of the food. Acidic foods such as fruit and pickles can be safely canned in a tin can with a hot water bath. A combination of acid and hot water (212°F) destroys perishable organisms such as mold and yeast. Proper cooking water canning processes are important to prevent the growth of acid-tolerant molds and yeasts that can lead to elevated pH levels. The pH of borderline foods such as figs and tomatoes can easily exceed 4.6, so lemon juice or citric acid should be added before canning with boiling water. Low-acid foods such as vegetables and meat should be processed in a pressure preserver for safety.

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Therefore, the correct options for 1, 2 and 3 are B, A and D respectively.

The ether which reacts with \(CH_3\), MgBr forms diethyl ether \((CH_3CH_2OCH_2CH_3)\). To form alkyl magnesium compounds, it reacts with \(CH_3\), MgBr. In organic chemistry, diethyl ether is often employed as a solvent and has a wide range of uses.

The aromatic chemical benzene \((C_6H_6)\) is distinguished by a ring of six carbon atoms with alternating double bonds. It serves as an important component in the synthesis of organic compounds due to its high stability and unique chemical characteristics.

The optimal reagent for the reaction \(CH_3CH_2CH_2CH_2OHCH_3CH_2CH_2CH_2Cl\) is \(SOCl_2\) (thionyl chloride). \(SOCl_2\) is often employed in an \(Sn_2\) substitution process to convert an alcohol to an alkyl chloride. An alkyl chloride is formed as a result of reaction with the hydroxyl group of an alcohol.

Therefore, the correct options for 1, 2 and 3 are B, A and D respectively.

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Your question is incomplete, most probably the complete question is:

1. Which of the following ethers reacts with CH3​MgBr?

a. CH3OCH3 (dimethyl ether)

b. CH3CH2OCH2CH3 (diethyl ether)

c. CH3CH2OCH3 (ethyl methyl ether)

d. CH3OCH2CH3 (methyl ethyl ether)

2. Which of the following is an aromatic compound?

a. Benzene (C6H6)

b. Ethanol (C2H5OH)

c. Acetic acid (CH3COOH)

d. Methanol (CH3OH)

3. For the following transformation the best reagent is: CH3​CH2​CH2​CH2​OH⋯CH3​CH2​CH2​CH2​Cl

a. NaCl

b. Cl2​

c. HCl

d. SOCl2​

Answer:

Sodium is a very reactive metal, it tends to react with oxygen to form sodium oxide but this is an unstable compound and soon reacts with hydrogen to form sodium hydroxide. is a sodium oxide formed by the reaction between sodium metal and oxygen of the air at room temperature.

Answer:

1. Magnesium + Oxygen --> Magnesium oxide

2.Iron + Oxygen --> Iron oxide

3.Copper + Oxygen --> Copper oxide

Explanation:

When an Element such as Magnesium or any other Elements are reacted eith Oxygen it forms an Oxide.

If you ever need the symbol equation here it is too :

1. Mg + O --> MgO

2.Fe + O --> FeO

3.Cu + O--> CuO

Answer:

CH³–C=CH——CH³–CH=CH²

Explanation:

THIS IS PROPYNE TO PROPENE

There are multiple ways to prevent these situations from occurring. The three most common protective devices are fuses, circuit breakers, and surge protectors

Explanation:

(a) Corrosion Penetration Rate (CPR) is a measurement of the thickness of a material's corrosion layer in terms of linear millimeters per year. Corrosion Penetration Rate is an important parameter that is widely used in the corrosion field to estimate the corrosion rate of a metal.

The penetration rate is determined by exposing a metal sample to the corrosive environment and measuring the quantity of metal that has been lost due to corrosion over a certain period of time. The formula used to calculate CPR is: CPR = Weight loss of the sample (mg) x 31556926.0 / A x D x t Where, A= Surface area of the sample (m²), D= Density of the sample (g/cm³), t= Exposure time in seconds

(b)Deterioration mechanism of polymetric materials:

(i) Thermal degradation: It is the process in which chemical decomposition occurs when a polymer is exposed to elevated temperatures, which can result in the loss of essential properties of the polymer.

(ii) Weathering: The process by which a polymer's structure and properties are altered as a result of exposure to the natural elements is referred to as weathering.

(c) Consequences of corrosion:

(i) Riveting a steel plate with copper rivets: When riveting a steel plate with copper rivets, galvanic corrosion is caused as a result of the contact between copper and steel. The steel will corrode more quickly than it would if it were in contact with a material that is less reactive than copper.

(ii) Connecting buried steel pipework to zinc plates: Connecting buried steel pipework to zinc plates can cause galvanic corrosion. Because zinc is more reactive than steel, the zinc plate corrodes and prevents the steel pipe from corroding. As a result, the zinc plate will corrode away, leaving the steel pipe vulnerable to corrosion.

(d) One-half of an electrochemical cell consists of a pure nickel electrode in a solution of Nid'ions, other half is a cadmium electrode immersed in a Cda solution. If the cell is a standard one:

(i) Spontaneous overall reaction: Ni(s) + Cd²⁺ (aq) → Cd(s) + Ni²⁺ (aq)

(ii) The voltage generated by the cell is: E°cell = E°cathode - E°anode

E°cell = E°Cd - E°Ni

E°cell = (-0.40) - (-0.25)

E°cell = -0.15V

Therefore, the voltage generated by the cell is -0.15V.

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The equation that is NOT needed to solve for pH is option V: K = [H] x [OH].

Above equation represents the equilibrium constant for the autoionization of water (Kw) and is not directly relevant for calculating the pH of a weak-acid solution. To solve for the pH of a weak-acid solution using systematic treatment, we typically require equations related to the dissociation of the weak acid and the equilibrium expressions for the acid and its conjugate base. These equations allow us to set up a system of equations equal to the number of unknown concentrations, which can then be solved to determine the pH. Equations I, II, III, and IV are all relevant in the systematic treatment for calculating the pH of a weak-acid solution. They involve the concentration of the weak acid ([HA]), its dissociation into its conjugate base ([A-]) and hydrogen ions ([H]), and the equilibrium constant (Ka) associated with the weak acid dissociation.

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Answer:

To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ions).

In 1.2 x \(10^{24}\) formula units of \(Li_{2} (SO)_{4}\), there are roughly 1.993 moles of

\(Li_{2} (SO)_{4}\).

Using Avogadro's number, or 6.022 x \(10^{23}\) molecules/mol, we can calculate the number of moles of Li2SO4 in 1.2 x \(10^{24}\)formula units.

First, we need to figure out how many moles of \(Li_{2} (SO)_{4}\)  are needed to equal 1.2 x \(10^{24}\)  formula units:

Formula units equal 6.022 x \(10^{23}\) per mole of \(Li_{2}(SO)_{4}\).

As a result, there are: 1.2 x \(10^{24}\) moles of \(Li_{2}(SO)_{4}\) in the formula units.

1.993 moles are equal to 1.2 x \(10^{24}\) formula units / 6.022 x \(10^{23}\) formula units/mol.

Hence, 1.2 × \(10^{24}\) formula units of \(Li_{2} (SO)_{4}\) contain about 1.993 moles.

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Answer: condensaytion

Explanation: its reverse vaporation instead of water turning into gas gas turns into water

The log Kow of 1,2,2,4-tetrachlorobenzene (TECB) is: 4.5

This meaning that TECB has a relatively high affinity for lipid-rich tissue such as fish. If the measured concentration of dissolved TECB in water is 4 ng/liter, we can estimate the concentration of TECB in the rainbow trout. We can do this by using the partition coefficient, which is calculated by dividing the concentration of the compound in the organism.

For example, if the concentration of TECB in the fish is 5 ng/g and the concentration of TECB in the water is 4 ng/liter, then the partition coefficient would be 5/4 or 1.25. Therefore, the concentration of TECB in the rainbow trout would be estimated to be 5 ng/g if the measured concentration of dissolved TECB in water is 4 ng/liter.

It is important to note that this estimated concentration is dependent on the partition coefficient and could vary depending on the conditions and environment in which the rainbow trout are living. Additionally, the estimated concentration of TECB could vary depending on the age and size of the rainbow trout as well as the temperature and pH of the water.

Therefore, it is important to consider these factors when estimating the concentration of TECB in the rainbow trout.

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Answer:

Newspaper

Explanation:

Edge

Answer:

The answer is Newspaper on edge

Explanation:

Hes correct

NaBrO₃ (sodium bromate) is an ionic compound. It consists of a metal (sodium, Na) and a polyatomic ion (bromate, BrO₃⁻).

Ionic compounds are compounds composed of positive and negative ions held together by electrostatic forces. They are formed through the transfer of electrons between atoms, resulting in the formation of positively charged cations and negatively charged anions.

In an ionic compound, the cations are typically metal ions, while the anions are usually nonmetal ions or polyatomic ions. The transfer of electrons occurs from the metal atom(s) to the nonmetal atom(s), resulting in the formation of a crystal lattice structure.

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This means that for every liter of water, there is 6.15 moles of the substance dissolved in it.

Substance is a concept that refers to a physical material or thing that has mass and occupies space. It is a fundamental concept of physics that applies to all physical and visible things in the universe. In philosophy, substance is a primary category of ontology that refers to the physical or material existence of things.

The molarity of the saturated solution can be calculated by dividing the solubility (360 g/L) by the molar mass of the substance (58.5 g/mol).
The molarity of the saturated solution is thus 6.15 mol/L.
This means that for every liter of water, there is 6.15 moles of the substance dissolved in it.

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When table sugar (sucrose) dissolves in water, the type of attraction that occurs between water and sugar molecules is primarily polar-polar interactions. Sucrose is a polar molecule due to the presence of hydroxyl (-OH) groups in its structure, which create regions of partial positive and negative charges.

Water molecules are also polar due to their bent shape and the presence of oxygen atoms with partial negative charges and hydrogen atoms with partial positive charges.

These opposite charges attract each other, causing the sugar molecules to be surrounded by water molecules and ultimately dissolve in the water.
While there are hydrogen bonds present between some of the hydrogen atoms in the water molecules and the oxygen atoms in the sugar molecule, these bonds are not strong enough to overcome the larger polar-polar interactions.

Covalent bonding does not occur between water and sugar molecules, as this would involve the sharing of electrons between the atoms of the two molecules.
Overall, the interaction between water and sugar molecules when sucrose dissolves in water is primarily due to the polar nature of both molecules, leading to polar-polar interactions.

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There are some important equations that we must know:

\(PV=nRT\)

\(n=\dfrac{m}{M}\)

We're given:

First, solve for n:

\(n=\dfrac{m}{M}\)

\(n=\dfrac{128}{32.00}\\\\n=4\)

Now, solve using the Ideal Gas Law:

\(PV=nRT\)

⇒ Isolate V:

\(V=\dfrac{nRT}{P}\)

⇒ Plug in given values:

\(V=\dfrac{4*8.31*273}{101.3}\\\\V =89.6\)

a. 89.6 L

Answer:

0.086

Explanation:

got it on acellus

The mass of the dry solute recovered from the given data is 0.086 g.  Option C

To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.

Given the data provided:

Boat Mass: 0.730 g

Boat + Solution: 0.929 g

Boat + Dry: 0.816 g

To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:

Mass of Dry Solute = (Boat + Dry) - (Boat Mass)

Mass of Dry Solute = 0.816 g - 0.730 g

Mass of Dry Solute = 0.086 g

Therefore, the correct answer is c) 0.086 g.

The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.

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Quantitatively, chemical reactions are determined by the reactant as well as product molecules.

A chemical reaction will be preferred as a process that results in the chemical change of one group of chemical substances into another set of chemical compounds.

A reactant would be a material that's also present when a chemical reaction begins. Products are still the substance to the right of the arrow. A product is a material that remains after a chemical reaction has been completed.

Quantitatively, chemical reactions are determined by the reactant as well as product molecules.

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Answer:

Explained below.

Explanation:

From avogadro's number, we know that;

1 mole = 6.022 × 10^(23) atoms, molecules, protons e.t.c.

Now,to convert from atoms, compounds, formula units, etc to moles, what we will do is just to divide the amount of the particle value given in the specific units by avogadro's number.

For example, to convert 23 × 10^(20) atoms to moles, we will have;

Number of moles = (23 × 10^(20))/(6.022 × 10^(23)) moles = 0.00382 moles

Answer:

14 dimes

Explanation:

48 nickels = 48 x .05 = $2.40

$3.80 - $2.40 = $ 1.40

$1.40 / .10 = 14 dimes

Answer:

0.032 M

Explanation:

pH denotes the acidity or alkalinity of an aqueous solution.  pH stands for potential hydrogen. The letter “p” denotes potential and the letter “H” denotes for hydrogen. A pH number varies from 0 to 14 depending upon on how acidic or alkaline a liquid is. Any aqueous solution that has pH above 7 is alkaline and any aqueous solution that has pH below 7 is acidic.

ph of phosphoric acid = 1.5

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

1.5 = -log[\(H_3O^+\)]

-1.5 = log[\(H_3O^+\)]

\([H_3O^+]=10^{-1.5}\) = 0.032 M

\(KNO3 (s)\)  → \(K+ (aq) + NO_3^- (aq)\) is an endothermic reaction and entropy decreasing.

An endothermic reaction is any chemical reaction that absorbs heat from its environment.

This reaction  \(KNO3 (s)\)  → \(K+ (aq) + NO_3^- (aq)\) is absorbing heat from the surrounding. Endothermic reactions are characterized by positive heat flow (into the reaction) and an increase in enthalpy (+ΔH).

It will lower the entropy of the surroundings by absorbing energy. In doing so the surroundings will lose energy, and randomness is decreased. These reactions are not spontaneous.

Hence, option B is correct.

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We need a thorough understanding of the citric acid cycle in order to address this. This means that every time that citric acid cycle changes turns, 3 NADH molecules are created.

Citrus acid, a naturally occurring organic acid, is present in many fruits, vegetable, including fruit liquids, particularly orange juice. It is not a vital vitamin or nutrient, thus you are not required to include it in their diet.

Citrus with acid is entirely safe. Your body breaks it down, and pee helps to get rid of it. In fact, magnesium oxalate, which causes kidney stones, might be prevented by this. Studies show that citric acid inhibits the growth of stones.

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Answer:

A.   it is the lowest at low temperatures

Explanation:

It is true with respect to the kinetic energy of a molecule that the it is the lowest at low temperatures.

The kinetic energy of a molecule is the energy due to the motion of the particles within a substance.

Answer:

A.  it is the lowest at low temperatures

B.  it increases at low temperatures

C.  it is the same at all temperatures

D.  it is the lowest at high temperatures

The question gives us the reaction to produce sodium sulfide (Na2S) from sodium sulfate (Na2SO4) and carbon (C) and provides the amount of reactants used (15.0 g of Na2SO4 and 7.50 g of C), asking the limiting reactant, the excess reactant and the amount of Na2S produced.

I) The first step for this type of question is checking if the given equation is balanced. For this case, we don't need to adjust the coefficients as the equation is already balanced.

II) Next, we need to calculate the molar mass of the compounds we'll be using. To calculate the molar mass, I'll be using the following atomic masses and considering the number of each atom in the molecules:

Na: 22.99 u

S: 32.07 u

O: 15.99 u

C: 12.01 u

Now, we can calculate the molar mass of Na2SO4, C and Na2S:

Na2SO4: molar mass = (2 * 22.99) + (1 * 32.07) + (4 * 15.99) = 142.01 g/mol

C: molar mass = (1 * 12.01) = 12.01 g/mol

Na2S: molar mass = (2 * 22.99) + (1 * 32.07) = 78.05 g/mol

iii) The third step is to convert the masses given for Na2SO4 and C into the correspondent number of moles using the molar mass of these compounds:

IV) On the forth step, we must define the limiting reactant for this reaction considering the amounts used of each one and the stoichiometric coefficients:

1 mol Na2SO4 reacts with 1 mol C

0.106 mol Na2SO4 reacts with...?

Solving this calculation, we have that we would need 0.106 mol of C to react with 15.0 g of Na2SO4. Since we there are 0.624 mol of C available to react, we can conclude that carbon is the reactant in excess (there is an excess of 0.518 mol) and sodium sulfate is the limiting reactant.

V) At last, we can calculate the amount of Na2S produced from the limiting reactant amount used (0.106 mol of Na2SO4) and the stoichiometric coefficients:

1 mol Na2SO4 ----------1 mol Na2S

0.106 mol Na2SO4 ---- y

Solving for y, we have that 0.106 mol of Na2S will be produced.

vWe can convert this amount into mass of Na2S using its molar mass:

In summary:

Na2SO4 is the limiting reactant and there is an excess of 0.518 mol or 6.22 g of C;

8.27 g of Na2S will be produced from 15.0 g of Na2SO4.

The heat of combustion per mol of the glucose is 2840 kJ.

A reaction that involves the burning of a compound in the presence of air or oxygen is called combustion. In the absence of oxygen combustion of a compound cannot take place.

It is given that the combustion of glucose produces carbon dioxide and water. The balanced chemical reaction for the given process is expressed as:

C6H12O6 (s) + 6O2 (g) ------> 6CO2 (g) + 6H2O (l)

The energy released from this reaction is -2840 kJ. The above equation clearly shows that 1 mol of glucose is used during the reaction and the energy produced is -2840 kJ.

Therefore, the heat of combustion per mol of the glucose is 2840 kJ.

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Answer:i don’t know

Explanation:i don’t know

When Benzoic Acid reacts with aqueous NaOH, a species of ester and Benzene named, Benzoate Ion is formed.

When Benzoic acid is reacted with aqueous NaOH, water and Sodium benzoate is formed.

Sodium benzoate is present with water, So, the sodium benzoate dissolves in water and forms benzoate ion.

Benzoate are species of ester.

Benzoate ion is soluble in water while benzoic acid is not soluble in water.

Benzoic acid forms a layer over water.

Benzoate is of great use in industrial purposes, it is used in food preservative and beauty products.

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