How many valence electrons are there in the P3–
ion?
A 3
B 5
C 8
D 15
E 18

Metamorphism, The process of metamorphism can result in various types of metamorphic rocks depending on the original rock type and the conditions of the metamorphic process.

Metamorphism is the process of transforming one type of rock into another through heat, pressure, and/or chemical processes. In the case of the buried shale body, the differential stress applied to the rock caused the clay minerals to realign and form slate, which is a type of metamorphic rock.

In this scenario, a buried body of shale undergoes differential stress, which causes the clay minerals within it to realign and ultimately produce slate. This process is known as metamorphism, which is the alteration of a rock's mineralogy, texture, or chemical composition due to changes in temperature, pressure, or the presence of fluids within the Earth's crust.

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At chemical equilibrium, changing any of the parameters would not change the concentration of the product.

Chemical equilibrium is defined as the condition which arises during the course of a reversible chemical reaction with no net change in amount of reactants and products.A reversible chemical reaction is the one wherein the products as soon as they are formed react together to produce back the reactants.

At equilibrium, the two opposing reactions which take place take place at equal rates and there is no net change in amount of the substances which are involved in the chemical reaction.At equilibrium, the reaction is considered to be complete . Conditions which are required for equilibrium are given by quantitative formulation.

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The time required for a reaction to reach equilibrium can depend on the value of Kc, which represents the equilibrium constant. The equilibrium constant, Kc, is determined by the concentrations of the reactants and products at equilibrium.

In general, reactions with a larger Kc value tend to reach equilibrium more quickly than those with a smaller Kc value. This is because a larger Kc indicates that the concentration of products is higher compared to the concentration of reactants at equilibrium. As a result, the reaction proceeds more rapidly to reach the point where the ratio of products to reactants matches the value of Kc.

Therefore, among the given options, the answer would be option (c) where Kc is a very large number. In this case, the reaction would require the least amount of time to reach equilibrium.

It's important to note that the actual time required for a reaction to reach equilibrium depends on various factors such as temperature, pressure, and the presence of catalysts. Additionally, the time required for a reaction to reach equilibrium cannot be determined solely based on the value of Kc. However, in general, a larger Kc value suggests a quicker attainment of equilibrium.

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Answer:

B

Explanation:

Chemistry is the study of matter, its composition and the changes it undergoes.

Answer:

The scientific study of matter

Explanation:

reviewed the work, its correct

Answer: Wowwwww

Explanation:yes

Answer:

NaOH

Explanation:

the balance equation is HBr +NaOH----> NaBr+ H2O. The salt formed is NaBr, sodium,Bromide

The two types of nucleophilic substitution reactions are SN1 and SN2. SN2 has two molecules, whereas SN1 only has one.

A nucleophilic molecule replaces a different atom or group of atoms on a molecule, known as the leaving group, in a nucleophilic substitution reaction. The substrate molecule is attacked by the nucleophilic molecule's abundant electrons.

A process in which one functional group or atom is swapped out for another negatively charged functional group or atom is known as a nucleophilic substitution reaction.

The SN1 reaction is monomolecular, whereas the SN2 reaction is bimolecular.

Any substitution reaction in which an atom or functional group is changed for one that has a single pair of electrons, a negatively charged ion, or both. The negatively charged ion or the atoms/molecules with lone pairs of electrons will be pulled to the positively charged area of an atom or complex in an effort to replace the functional group or atom already attached to the positive location.

Therefore, The two types of nucleophilic substitution reactions are SN1 and SN2. SN2 has two molecules, whereas SN1 only has one.

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Answer:

1.63 × 10²⁴ atoms.

Explanation:

To calculate the number of atoms (N) contained in 2.7moles of carbon, we multiply the number of moles (n) by Avogadro's number (6.02 × 10²³).

That is, N = n × nA

Where;

N = number of atoms

n = number of moles (mol)

nA = Avogadro's numbe

N = 2.7 × 6.02 × 10²³

N = 16.254 × 10²³

N = 1.63 × 10²⁴ atoms.

Hence, there are 1.63 × 10²⁴ atoms in 2.7moles of Carbon.

Wascana Chemicals should use emissions reduction technologies to reduce the amount of sulphur dioxide emitted during paint production.

To comply with the Ministry of Environment's directive, Wascana Chemicals, a paint manufacturer, needs to reduce the amount of sulphur dioxide released during paint production. This can be accomplished through the use of emissions reduction technology, such as scrubbers, catalytic converters, or gasification systems.Scrubbers are devices that use a wet process to remove pollutants from gas streams. The gas stream is forced through a scrubbing solution that traps pollutants, including sulphur dioxide.Catalytic converters, on the other hand, use a chemical process to transform pollutants into less harmful substances. Gasification systems convert solid or liquid materials into a gas, which can be combusted to generate energy.

In conclusion, to comply with the Ministry of Environment's emissions reduction regulations, Wascana Chemicals should consider implementing one or more emissions reduction technologies such as scrubbers, catalytic converters, or gasification systems to reduce the amount of sulphur dioxide emitted during paint production.

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Answer:

42

Explanation:

my brother said

1) The percentage ionization is 3.2%

2) The percentage ionization is 21.9%

The percent ionization is primarily used for weak acids and bases, where only a fraction of the compound dissociates. Strong acids and bases, on the other hand, completely dissociate in solution, so the percent ionization is 100%.

We have to use the formula;

α = √ka/C * 100

Where;

α = percent ionization

Ka = The dissociation constant

C = concentration

Then;

α = √1.4×10^−4/0.135 * 100

= 3.2 %

2) α = √6.5×10^−3/0.135 * 100

= 21.9%

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Answer:Scientists used the model to make predictions. Sometimes the results of their experiments were a surprise and they did not fit with the existing model. Scientists changed the model so that it could explain the new evidence. The discovery of electrons. Atoms can be broken down into smaller parts.

Explanation:

Answer:

pi

Explanation:

In chemistry, a covalent bond is formed by the overlap of atomic orbitals. The bond formed may be a sigma bond or a pi bond depending on the way the atomic orbitals are overlapped.

If the overlap occurs in a side-to-side manner, the bond formed is said to be a pi bond. Pi bonds are common in organic species having multiple bonds such as ethene and benzene.

Answer:

The protons determine the name of an element and also atomic number because its the same as protons.

Answer:

at the nuclear reactor site

Explanation:

In the United States, liquid high-level waste is stored in underground tanks pending vitrification. High-level waste is stored at the nuclear reactor site.

Such waste was created by the weapons programs of the cold war and the Manhattan project. This waste can not be vitrified as there were not enough funds for further processing.

Answer:

at the nuclear reactor site

Explanation:

If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L}\\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{5.00 \times {10}^{26} }{6.02 \times {10}^{23} } \\ = 830.5647..\)

We have the final answer as

Hope this helps you

Answer:

it gives  CH2OH-CH2OH(ethylene  glycol +MnO2  

Explanation:

If you mixed 8.203 g of sodium acetate in a buffer solution, we can calculate the concentration of sodium acetate in the solution.

First, we need to determine the number of moles of sodium acetate using its molar mass. The molar mass of sodium acetate (CH3COONa) is approximately 82.03 g/mol.Number of moles of sodium acetate = mass / molar mass

Number of moles of sodium acetate = 8.203 g / 82.03 g/mol

Number of moles of sodium acetate ≈ 0.1 mol Next, we need to consider the volume of the solution in which the sodium acetate is dissolved. Without this information, we cannot determine the concentration of sodium acetate accurately.If you provide the volume of the solution, we can calculate the concentration by dividing the number.

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Answer:

D i belive

Explanation:

Answer:

Mechanical weathering is usually caused by extreme hot and cold temperatures. Water seeps into cracks in rocks, freezes, and expands, causing further breakdown of rocks. Wind is another example of mechanical weathering.

Explanation:

Answer:

carbon dioxide i think

Explanation:

Answer:

Heterogeneous method

Explanation:

In general, a gravimetric method of analysis consists

of the following steps:

Weighing and dissolving the sample in the proper solvent.

Carrying out a sequence chemical reactions to  obtain a suitable product.

Determining the mass of the product

Calculating the composition of the sample rom mass of product and information about the original sample.

Precipitates obtained by heterogeneous methods are often difficult to filter and are always contaminated by  adsorbed and occluded impurities which ultimately increase the percentage yield of  nickel due to occluded impurities.

Answer:

It would be the chloride ion, with a charge of

1

−

.

Explanation:

A neutral chlorine atom has the electron configuration

1s

2

2s

2

2p

6

3s

2

3p

5

. In an ionic compound, chlorine gains the sixth

3p

electron, most likely when reacting with a metal such as sodium (Na), forming the chloride ion,

Cl

−

.

The image below represents the formation of the ionic compound sodium chloride,

NaCl

. The bond is formed by the electrostatic attraction between the positive and negative ions.

Answer:

The new volume of a gas at 750 mmhg and with a volume of 2. 00 l when allowed to change its volume at constant temperature until the pressure is 600 mmhg is 2.5 Liters.

Explanation:

Boyle's law states that the pressure of a given amount of gas is inversely proportional to it's volume at constant temperature. It is written as;

P ∝ V

P V = K

P1 V1 = P2 V2

Parameters :

P1 = Initial pressure of the gas = 750 mmHg

V1 = Initial pressure of the gas = 2. 00 Liters

P2 = Final pressure of the gas = 600 mmHg

V2 = Fimal volume of the gas = ? Liters

Calculations :

V2 = P1 V1 ÷ P2

V2= 750 × 2. 00 ÷ 600

V2 = 1500 ÷ 600

V2 = 2.5 Liters.

Therefore, the new volume of the gas is 2. 5 Liters.

The nutrition label is the representation of the calories provided by the molecules. If Eva eats the whole package weighing 0.150 pounds then she consumed 207.9 calories.

The nutrition label has been seen on packaged food items and is a representation of the nutrient values given by the ingredients like the fat, carbohydrates, proteins, fats, fiber, minerals, vitamins, etc. in per serving amount.

Given,

One serving weighs = 36 grams

Calories per serving = 110 calories

Total box weighs = 0.150 pounds

It is known that 1 pound = 453.592 grams

Then, 0.150 pounds = 68.03886 grams

If 36 grams = 110 calories

Then, 68.04 grams = X calories

Solving for X as:

X = (110 calories × 68.04 grams) ÷ 36 grams

X = 207.9 calories

Therefore, Eva consumes 207.9 calories.

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Answer:

2/3 xX ml of gas

Explanation:

P1V1= P2V2

2 x X= 3 x y

y (new volume)= 2/3 x

0.66 x will be the new volume when the pressure of x mL of gas was increased from 2 ATM to 3 ATM at a constant temperature.

The ideal gas law (PV = nRT) relates to the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Given:

\(P_1\)= 2 ATM

\(V_1\)= x mL

\(P_2\) =3 ATM

\(V_2\) =?

\(P_1V_1= P_2V_2\)

2 x X= 3 x Y

Y(new volume)= 0.66 x

Hence, 0.66 x will be the new volume when the pressure of x mL of gas was increased from 2 ATM to 3 ATM at a constant temperature.

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It is possible to determine how much of a nuclide is still present after a specific amount of time by using the equation:N0 * e(-kt) = N(twhere N(t) denotes the quantity




nuclide still present at time t, N0 denotes the nuclide's starting concentration, k denotes the decay constant, and e denotes the base of natural logarithmsThe equation below can be used to link the decay constant to the nuclide's half-life (t1/2):k = ln(2) / t1/2With the supplied values entered into these equations, we obtain:0.115 day-1 is equal to k = ln(2) / t1/2 = ln(2) / 6.01 days.The formula for N(t) is N0 * e(-kt) = N0 * e(-0.115 * 18.03 days) = 0.407 * N0.In light of this, the mass of the initial sample that is still present after 18.03 days is:m = 0.407 * 46.3 ng = 18.84where N(t) denotes the quantity of a nuclide still present at time t, N0 denotes the nuclide's starting concentration, k denotes the decay constant, and e quantity the base of natural logarithms.The equation below can be used to link the decay constant to the nuclide's half-life (t1/2):k = ln(2) / t1/2With the supplied values entered into these equations, we obtain:0.115 day-1 is equal to k = ln(2) / t1/2 = ln(2) / 6.01 days.The formula for N(t) is N0 * e(-kt) = N0 * e(-0.115 * 18.03 days) = 0.407 * N0.In light of this, the mass of the initial sample that is still present after 18.03 days is:m = 0.407 * 46.3 ng = 18.84 ngTherefore, the answer is almost 18.8 ng. As a result, the closest choice is 40.3 ng, which is incorrect.

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Answer:

See explanation

Explanation:

It is commonplace to put polyatomic ions in parenthesis when they are more than one in a compound. A typical example here is calcium phosphate- Ca3(PO4)2.

When a compound contains more than a single polyatomic ion of the same type,a parentheses is placed  around the formula of that ion then a subscript is used to indicate how many  of that particular ion are in the compound.

Answer:

occur if two of the ions form an insoluble ionic compound, which precipitates out of solution

Explanation:

When two ionic compounds are dissolved in water, a double replacement reaction takes place if two of the ions form an insoluble ionic compound, which precipitates out of solution. In double displacement reaction ions switch partners. And hence, produce an insoluble precipitate.

Answer:

ATOMIC number of element A is 3

Explanation:

Atomic number is the same as number of protons of an element.

according to the periodic table, Lithium is the element with 3 protons in its neutral state and it's atomic number is 3.