0. 063L solution of Ba(OH02 is neutralized by 0. 0234L of a 1. 52 M HNO3 solution. What is the concentration of the Ba(OH)2 solution

Answer:

Answer choice (A)

Explanation:

Markovnikov addition of HCl to propene involves the initial attack by a chlorine ion (A) on the carbon-carbon double bond of propene. The chlorine ion carries a negative charge and is attracted to the positively charged carbon atom of the double bond. The attack results in the formation of a carbocation intermediate, which is stabilized by the chloride ion. The chloride ion then adds to the carbocation, resulting in the formation of 2-chloropropane. The addition follows Markovnikov's rule, which states that the hydrogen atom of HCl adds to the carbon atom of the double bond that already has more hydrogen atoms attached to it.

One change in the apparatus in the diagram that would improve the accuracy of the results is this: Closing the beaker with a lid to avoid energy emission to the atmosphere.

The diagram is an open beaker that contains an evaporating substance. Since the beaker is open, it is expected that the energy contained in the beaker would be automatically transferred to the environment.

This could result in a loss of substance that would affect the accuracy of any result but closing the lid will preserve the content and give a more accurate result.

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Complete Question:

Suggest one change in the apparatus in the diagram above which would improve the accuracy of the results. Give a reason for your answer. (The diagram depicts an open beaker containing reactants and a spatula held inside.)

Catalysts are correctly characterized by each of the following statements except one. Catalysts are characterized by being able to exist in various states (solids, liquids, or gases),
The correct answer is (e) no correct response.

All of the statements are correct and accurately describe catalysts.
(a) Catalysts can exist in any state, whether they are solids, liquids or gases.
(b) One of the primary functions of a catalyst is to lower the activation energy required for a reaction to occur. This allows the reaction to proceed more quickly and efficiently.
(c) Catalysts do not participate in the reaction itself, but rather facilitate it.
(d) Catalysts are not consumed during a reaction and can be reused multiple times.

Catalysts are characterized by being able to exist in various states (solids, liquids, or gases), lowering the activation energy for a reaction, and not being consumed in a reaction. However, they do actively participate in a reaction by providing an alternative reaction pathway and forming temporary intermediate compounds, which ultimately helps increase the reaction rate.

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There are 85.66 grams of O₂ in 60 liters of O₂.

The ideal gas states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.

It is expressed as;

PV = nRT

Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK )

We can rearrange this equation to solve for n:

n = PV/RT

Since we're given the volume (60 L) and we're interested in the number of grams of O₂, we need to find the number of moles of O₂ first:

n = PV/RT

n = (1 atm) × (60 L) / [(0.08206 L·atm/mol·K) × (273.15 K)]

n = 2.6768 moles of O₂

Next, we can use the molar mass of O₂ to convert from moles to grams:

m = n x M

Where m is the mass in grams, n is the number of moles, and M is the molar mass of O₂.

Note that: the molar mass of O₂ is 32 g/mol (16 g/mol for each oxygen atom).

Hence

m = n x M

m = 2.6768 moles × 32 g/mol

m = 85.66 grams of O₂

Therefore, there are 85.66 grams.

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The change in entropy (ΔSo) of the forward reaction being positive indicates that the disorder of the system increases. In simpler terms, it means that the system becomes more chaotic or disordered during the forward reaction.

Entropy is a measure of the randomness or disorder in a system. When the change in entropy of the forward reaction is positive, it means that the number of possible arrangements or microstates of the system has increased. This results in an increase in disorder or randomness.

In other words, the system becomes more disordered as the reaction proceeds forward. This can happen when there is an increase in the number of particles, an increase in temperature, or a change from a more ordered state to a less ordered state. The positive change in entropy indicates that the reaction is moving towards a state of higher disorder.

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Answer:

The property of all bases are or might be conversation

Explanation:

On edg

This problem is providing us with the mass of solid sodium chloride and the volume of water it was dissolved in. Thus, after diluting it, the volume of the stock solution was required and found to be 60. mL according to:

In chemistry, when we are given a stock solution with specified volume and concentration, one is able to dilute it in order to use it for a specific purpose. This, by holding the number of moles constant, one can write:

\(C_1V_1=C_2V_2\)

Where the subscript 1 stands for the stock solution and 2 for the diluted one. Thus, one first calculate the initial concentration with the mass and volume:

\(M=\frac{70.13g/(58.44 g/mol)}{0.400L}=3.00M\)

Next, we solve for the volume of the stock solution, V1, as follows:

\(V_1=\frac{C_2V_2}{C_1}\)

Finally, we plug in the given data to obtain the result:

\(V_1=\frac{1.2M*150mL}{3.00M}\\ \\V_1=60.mL\)

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Answer:

Helium (He)

Lithium (Li)

Beryllium (Be)

Boron (B)

Explanation:

The chemical elements which have two (2) electron shells are: Lithium and Boron.

Valence electrons can be defined as the number of electrons present in the outermost electron shell of an atom. Thus, valence electrons is typically used to determine whether or not an atom or group of chemical elements found in a periodic table can form a chemical bond with others.

This ultimately implies that, valency is a property that is typically used in determining the chemical properties of chemical elements.  

An electron shell can be defined as the outermost shell of an atom around the atomic nucleus. Thus, it is considered to be an orbit accompanied by electrons around the nucleus of an atom.

In Chemistry, the chemical elements which have two (2) electron shells are:

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Answer: it consists of two simple machines: a lever and a wheel and axle. Effort is applied to the lever by picking up the handles of the wheelbarrow.

Explanation:

Answer:

B

Explanation:

B)

If you have 9 moles of CaCl₂ and all the  Na₃PO₄i needed 18 moles of NaCl

In the chemical reaction here

CaCl₂ +  Na₃PO₄ → Ca₃(PO₄)₂ + NaCl if we balance this chemical reaction then

3CaCl₂ +  2Na₃PO₄ → Ca₃(PO₄)₂ + 6NaCl then Ca=1×3=3

,Cl=2×3=6,

Na=3,PO₄=1,

all this are in reactant Ca=3, Cl=1, Na=1, PO₄=2 all this are in product so NaCl produce 18 moles.

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Lewis dot structure for CBr₄ can be seen in the figure.

The Lewis structure is the writing of the atomic symbol along with the valence electrons. Valence electrons are marked with dots or small crosses. Composed of one C atom and 4 Br atoms. The electron configuration of the C atom and the Br atom is as follows:

₆C= 2 4

₃₅Br = 2 8 18 7

₃₅Br = 2 8 18 7

₃₅Br = 2 8 18 7

₃₅Br = 2 8 18 7

The C atom needs 4 more electrons to reach stability while the Br atom needs one more electron to achieve stability. So that the C atom will donate one electron to each Br to be used together and each Br donates one electron to C to be used together. In writing the Lewis structure, the C atom serves as the central atom surrounded by Br atoms.

The correct question:

Lewis dot structure for CBr₄?

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Answer:

Very fast

Explanation:

Free energy change for transporting Ca2+ ions is calculated as follows:∆G = RT ln ([Ca2+]outside/[Ca2+]inside)∆G = 8.315 J/mol.K x 310 K x ln (25 mM/145 mM) = -15,400 J/mol.

Here, ∆G is negative, which implies that Ca2+ ions transport spontaneously from the cell to blood. This is because the free energy of the system decreases when Ca2+ ions move from high concentration to low concentration. Therefore, transporting Ca2+ ions is energetically favorable.

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Explanation:

Half life= 19yrs

K= 0.693/19yr

K= 0.036

In Nt = - kt + ln No

ln 9000 = - 0.036(t) + ln 63000

9.105 = - 0.036t + 11.051

-0.036t = -1.946

t = 54.06years

The polyatomic ions are those ions which has more than two atoms involved such as the other options than OH^-1 in the question. The OH^-1 ion is the diatomic ion because it has only 2 atoms

If 170 milligrams of a radioactive substance decays to 85 g after 16 hours. Then, after 21 hours, approximately 75.2 mg of the radioactive substance will remain.

The decay of the radioactive substance follows an exponential decay equation of the form:

\(N(t) = N_{o} \times e^{-kt}\)

Where:

N(t) is the amount of substance remaining at time t

N₀ is the initial amount of substance

k is the decay constant

t is the time elapsed

Given to us is N₀ = 170 mg and N(16) = 85 mg. We can use this information to find the decay constant, k.

\(85 = 170 \times e^{-k \times 16}\)

Dividing both sides by 170:

\(0.5 = e^{-k \times 16}\)

To solve for k, we can take the natural logarithm (ln) of both sides:

ln(0.5) = -k × 16

from this, the value of k comes out to be:

k = 0.0431

Now we can use the decay equation to find the amount of substance remaining after 21 hours, N(21):

\(N(21) = 170 \times e^{-0.0431 \times 21}\)

Calculating this expression:

N(21) = 75.2

Therefore, after 21 hours, approximately 75.2 mg of the radioactive substance will remain.

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The silica (SiO2) content in magma can affect its behavior in several ways: Viscosity, Explosive Eruptions, Cooling Rate, Composition of Rocks Formed.

Viscosity: Silica content has a significant impact on the viscosity of the magma, which refers to its resistance to flow. Magmas with higher silica content tend to have a higher viscosity, making them more resistant to flow and less likely to erupt.

Explosive Eruptions: Magmas with high silica content tend to be more explosive when they erupt, because the high viscosity prevents the release of trapped gas. When gas finally escapes, it creates a violent explosion.

Cooling Rate: Silica-rich magmas tend to cool more slowly than magmas with low silica content, allowing more time for mineral crystals to grow and form solid rock.

Composition of Rocks Formed: The silica content of magma affects the type of rocks that are formed when it cools and solidifies. Magmas with high silica content tend to form volcanic rocks such as rhyolites and granites, while magmas with low silica content tend to form basaltic rocks.

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The number of molecules in one mole of ammonia and the number of atoms in one mole of ammonia are same which equals to 6.023 × 10²³.

Avogadro's principle:

"This law states that under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules".

Avogadro's number is the number of units present in one mole of any substance is equal to 6.023 × 10²³. The units of the substance may be different according to its character, units may be ions, atoms, electrons or molecules.

According to Avogadro's rule the number of ions and the number of molecules present in one mole of NH₃ is 6.023 × 10²³.

Hence, the number of molecules in one mole of ammonia and the number of atoms in one mole of ammonia are same.

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Answer:

inert ; take up electrons

Answer:

my sources say that there is a lot of empty space between then

Explanation:

their forces to attract each other is not strong

kinetic energy is always high in gasses

The average atomic mass of strontium reported to two decimal places is 87.62 amu

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Answer:

Explanation:

Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.

The decomposition reaction can be represented by the general equation:

AB → A + B

Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.

There are different types of decomposition reactions, including:

Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):

CaCO3 → CaO + CO2

Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):

2H2O → 2H2 + O2

Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:

Cl2 → 2Cl

These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.

Answer:

Explanation:

reaction in which a compound breaks down into simpler substances or elements

Answer:

so so soon deep see see second

Explanation:

hail also

Answer:

temperature

Explanation:

increase in temperature increases the rate of reaction

The formation of 1-bromobutane involves the following reaction mechanism: 1. Nucleophilic substitution (SN2): Butanol reacts with a bromide ion (Br-) to form 1-bromobutane and a hydroxide ion (OH-). Butanol + Br- → 1-bromobutane + OH-

The formation of 1-butene and di-n-butyl ether are side reactions in this process:
1. Elimination (E2) reaction: Butanol undergoes an elimination reaction to form 1-butene and water.
Butanol → 1-butene + H2O

2. Williamson ether synthesis: Two butanol molecules react with each other in the presence of a base, forming di-n-butyl ether and water.
2 Butanol + Base → di-n-butyl ether + H2O + Base

It's necessary to remove water before weighing the 1-bromobutane because water could alter the measured weight, leading to inaccurate results. Water can also promote side reactions like the formation of di-n-butyl ether, which could further impact the yield and purity of the desired product, 1-bromobutane.

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Answer:

True

Explanation:

Vacuum packing is a method of packaging that removes air from the package  before sealing. ... On a more short-term basis, vacuum packing can also be used to store fresh foods, such as vegetables, meats, and liquids, because it inhibits bacterial growth. Vacuum packing greatly reduces the bulk of non-food items.