An isotope of an element has 95 protons and 146 neutrons. What is the symbol for this
element?

Answer:

b) salt dissolved in water.

Drawing several Lewis structures of a molecule connected by double arrow symbols (↔) implies that the molecule exhibits resonance. Resonance occurs when multiple Lewis structures can be written for a molecule, representing different arrangements of electrons. The actual structure of the molecule is a hybrid or combination of these resonance structures, and the double arrow signifies the delocalization or sharing of electrons between different atoms or regions within the molecule.

Resonance is a concept used in chemistry to describe situations where multiple Lewis structures can be drawn for a molecule, but none of the individual structures accurately represent the molecule's true electronic structure. Instead, the actual structure is a hybrid or combination of these resonance structures.

When drawing resonance structures, double arrow symbols (↔) are used to connect the different structures. The double arrow indicates that the molecule can exist in all of the resonance forms simultaneously, with electron delocalization or sharing occurring between different atoms or regions within the molecule.

The presence of resonance is often observed in molecules with conjugated systems, such as benzene or carbonate ions. The resonance stabilization provided by electron delocalization contributes to the stability and unique properties of these molecules.

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Answer:

5.0

Explanation:

Answer:

whats the answer i been trying to find it please

Explanation:

thanksss

Answer:

1. determining the pOH of the solution from the given pH of 10.00 assuming the solution is at 25° C.

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

It takes approximately 115 years until only 6 percent of the original amount absorbed remains. The half-life of a radioactive substance that is reduced by 15 percent in 60 hours is approximately 252.36 hours.

Radioactive decay is given as, P = P0 × (1/2)^(t/h), whereP0 is the initial amount of the substance, P is the amount remaining after time t has passed, h is the half-life of the substance.                                                                                                                    Using the given data, P = 0.06P0, P0 = 1 (since it's the initial amount), h = 30 (years).                                                                                                                  Using these values in the above formula, we can write; 0.06 = 1 × (1/2)^(t/30).                                                                                                             Taking the natural logarithm of both sides gives us; ln (0.06) = ln (1/2)^(t/30)We know that ln (1/2) = -0.693.                               So, we can substitute it into the above formula, and solve for t;-2.813 = (-0.693t)/303.834 = t.                                            Therefore, it takes approximately 115 years until only 6 percent of the original amount absorbed remains.                                                        The half-life (in hours) of a radioactive substance that is reduced by 15 percent in 60 hours is given as, P = P0 × (1/2)^(t/h).                                                                                                                                                                                                            We know that P0/P = 1 - 0.15 = 0.85, and t = 60, so; 0.85P0 = P0 × (1/2)^(60/h)0.85 = (1/2)^(60/h).                                             Take the natural logarithm of both sides;-0.1625 = (60/h) × ln (1/2)-0.1625 = (60/h) × -0.6930.1625 = (60/h) × 0.693h = 252.36.                                                                                                                                                                                                     Therefore, the half-life is approximately 252.36 hours.

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Answer:

Explanation:

1 mol of Mg = 6.02 * 10^23 ions of magnesium

x = 1.25 * 10^23 ions of magnesium

1/x = 6.02 * 10^23/1.25 * 10^23         Cross multiply

x*6.02 * 10^23 = 1 * 1.23 * 10^23       Divide by 6.02*10^23

x = 1.25 * 10^23 / 6.02*10^23

x = 0.208 mols

Answer:

the leaves i think

Explanation:

i had this on a test once.

When we add the two reactions X and Y as shown, we obtain the reaction Z; 2CH4(g) +3O2(g) + O2(g)  →  4H2O(g) + 2CO2(g)

From the full question, we can see that reaction X is given as;

2CH4(g) +3O2(g) →2CO(g) + 4H2O(g)

Reaction Y is given as;

2CO(g) + O2(g) → 2CO2(g)

If we add the two reactions together, we have;

2CH4(g) +3O2(g) + 2CO(g) + O2(g)  → 2CO(g) + 4H2O(g) + 2CO2(g)

We now have to cancel out  2CO(g) on both sides of the reaction equation;

2CH4(g) +3O2(g) + O2(g)  →  4H2O(g) + 2CO2(g)

Hence the reaction Z is 2CH4(g) +3O2(g) + O2(g)  →  4H2O(g) + 2CO2(g)

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Answer:

Explanation:

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Ethanol is produced when ethane and ethene react with water and a catalyst like sulfuric acid. Adding concentrated sulfuric acid to hot ethanol (acts as a catalyst).

To eliminate carbon dioxide and sulphur dioxide that are created as byproducts, the gases are passed through a sodium hydroxide solution. The main product that is gathered over water is ethene. As a result, dehydration of ethanol produces ethene rather than ethane. The names Mattling acid and Oil of Vitriol are other names for sulfuric acid. It is highly caustic and acidic in nature. It dehydrates and oxidises when  present in higher amounts. It is a clear, syrup-like liquid with no colour or smell. A substance having the chemical formula C 2H 6, ethane is an organic chemical.

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Spectra analysis is the process of interpreting the information contained in a spectrum, such as a mass, IR, NMR or Raman spectra. The peaks in a spectrum represent specific molecular species or functional groups, and the assignment of these peaks to specific compounds or functional groups is an important part of spectra analysis.

The emission spectra or emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.

In chemical reactions, impurities are often produced as byproducts and can interfere with the desired outcome. Some common impurities include unreacted starting materials, side products, contaminants, and degradation products. Whether or not these impurities are visible in a spectrum depends on the sensitivity of the instrument and the specific spectra being analyzed.

If you provide me with more specific information about the spectra you're analyzing, I would be happy to provide more information.

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B. The chemical reaction that represents oxidation - reduction reaction is CaCO3(s) → CaO(s) + CO2(g).

In oxidation reduction reaction, the oxidizing agent is reduced while reducing agent is oxidized.

CaCO3(s) → CaO(s) + CO2(g)

Calcium (ca) is oxidized calcium (II) ion while the carbon (IV) oxide is reduced carbon (IV) oxide.

Thus, the chemical reaction that represents oxidation - reduction reaction is CaCO3(s) → CaO(s) + CO2(g).

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Answer: The answer is B

Explanation: on edge

Answer:

PbCO₃ + 2HNO₃ –> Pb(NO₃)₂ + CO₂ + H₂O

Explanation:

From the question given above:

Solid lead (II) carbonate reacts with a dilute solution of nitric acid (HNO₃) to give a solution of lead (II) nitrate,

carbon dioxide and water.

The above can be represented in the equation form as follow:

PbCO₃ + HNO₃ –> Pb(NO₃)₂ + CO₂ + H₂O

Finally, we shall balance the equation as follow:

PbCO₃ + HNO₃ –> Pb(NO₃)₂ + CO₂ + H₂O

There are 2 atoms of H on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HNO₃ as shown below:

PbCO₃ + 2HNO₃ –> Pb(NO₃)₂ + CO₂ + H₂O

Now, the equation is balanced.

Answer:

???????

Explanation:

fluorineelement has 9 electrons, and 11 neutrons

Answer:

Surface Irrigation. Water is scattered equally throughout the land with the help of gravitational pull and it doesn’t require a machine to take care of it.

Localized Irrigation. Water is scattered throughout the land under low pressure.  

Drip Irrigation. In this process of drip irrigation, the water drops fall on the root of every plant that is around the system.

Explanation:

The subscript in alpha radiation stands for the charge on the nucleus (i.e., the quantity of protons or atomic number, also known as the Z number), and the superscript is the mass number.

In beta radiation, the particle's charge is indicated by the subscript -1, and its almost completely absent mass is indicated by the superscript 0. (no protons or neutrons). The radioactive thorium-234 nucleus is another illustration.

While alpha and beta particles have positive and negative charges, respectively, gamma rays are neutral. An alpha particle is created when two protons and two neutrons come together. Beta particles are high-energy electrons. Photons, which are electromagnetic energy waves, are gamma rays.

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Answer:

the products which is formed in the given reaction is MgO ( magnesium oxide )

Explanation:

when magnesium metal reacts with oxygen present in air it burns with a white dazzling flame

to form white powder of magnesium oxide (MgO)

here's the balanced chemical reaction for it

2Mg+O2->2MgO

Answer:

3. Texture.

Explanation:

Igneous rocks texture refers to the size of minerals in the rock, which is assessed by how visible they are to the naked eye.

Answer:

The first one.

Explanation:

Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.

The correct answer is D. 100 mL × 1g divided by 1mL × 1mol divided by 18.02g × 4.186 kJ/mol = 23.2 kJ

To calculate the energy required to boil 100 mL of water, we need to use the specific heat capacity of water, which is approximately 4.186 J/g·°C. The molar mass of water is 18.02 g/mol.

First, we convert the volume of water from milliliters to grams:

100 mL × 1 g/1 mL = 100 g

Then, we calculate the number of moles of water:

100 g × 1 mol/18.02 g = 5.548 mol

Finally, we multiply the number of moles by the molar heat of vaporization of water, which is approximately 40.65 kJ/mol:

5.548 mol × 4.186 kJ/mol = 23.2 kJ

Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.

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The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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Answer:

22,600 J or 22.6 kJ

Explanation:

Answer:

A.

Explanation:

because im smart

Answer:

C. The hand shears because their shorter handles transfer force more quickly to the cutting blade.

Explanation:

Answer:

Using the combined gas law:

(P1 x V1) / T1 = (P2 x V2) / T2

where:

P1 = 34.5 psi (initial pressure)

V1 = 32.2 L (initial volume)

T1 = 27°C + 273.15 = 300.15 K (initial temperature in Kelvin)

V2 = 31.04 L (final volume)

T2 = 43°C + 273.15 = 316.15 K (final temperature in Kelvin)

Solving for P2:

(P1 x V1 x T2) / (V2 x T1) = P2

(34.5 psi x 32.2 L x 316.15 K) / (31.04 L x 300.15 K) = P2

P2 = 37.2 psi

Therefore, the new pressure in the tire is 37.2 psi when the temperature increases to 43°C and the volume decreases to 31.04 L.

Among the options provided, the statement that accurately describes a type of potential energy found in a container full of a chemical substance in liquid form is: "The bonds between atoms are one place where potential energy is stored."

In a container filled with a chemical substance in liquid form, the potential energy is primarily stored in the bonds between atoms within the molecules of the substance. These bonds are formed by the sharing or transferring of electrons between atoms, creating a stable arrangement. The potential energy arises from the electrostatic interactions between the charged particles involved in these chemical bonds.When the liquid substance is in its equilibrium state, the potential energy stored in the bonds represents the energy required to break these bonds and separate the atoms, transforming the substance into a different state (such as a gas or a solid).

This potential energy is released when the substance undergoes a chemical reaction or when external forces act upon it.While other forms of potential energy can also exist in a liquid substance, such as kinetic energy due to the speed of the particles or vibrational energy of the atoms within the molecules, these are generally associated with other types of energy rather than potential energy.

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The method to revert any imine reaction is through hydrolysis.

The reaction of an imine can be reversed by hydrolysis, which involves the addition of water to the imine bond, resulting in the cleavage of the bond and the regeneration of the carbonyl and amine functional groups.

The hydrolysis of an imine can be achieved using either an acid-catalyzed or base-catalyzed mechanism.

In acid-catalyzed hydrolysis, the imine is typically treated with an acid, such as hydrochloric acid or sulfuric acid, to protonate the imine nitrogen and make it more susceptible to nucleophilic attack by water.

The resulting intermediate then undergoes hydrolysis to form the carbonyl and amine functional groups.

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