Pickles are made by soaking cucumbers in a mixture of
table salt (sodium chloride), water, and spices. If you
place a cathode and anode at either end of the pickle, it
will light up. Why does this happen, and why won' the
experiment work if you plug in a plain cucumber instead?

The product(s) in the reaction are: NaOH and H₂ (Option C)

Chemical equations are representations of chemical reactions. All chemical equations has two sides:

The reactants are located on the left side while the products are located on the right side as shown below:

Reactants —> Products

With the above information, we can obtain the products of the reaction given in the question above. This is shown below:

2Na(s ) + 2H₂O(I) → 2NaOH(aq) + H₂(g)

The products are NaOH and H₂

Thus, the correct answer to the question is: 2NaOH(aq) + H₂(g) (Option C)

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A pure substance is indeed a single kind of matter with a uniform and definite composition. In contrast, a mixture is made up of two or more substances that are together in the same place, but each substance maintains its own properties.

Mixtures can be classified as either homogeneous or heterogeneous. A homogeneous mixture has a uniform composition throughout, meaning its components are evenly distributed and not easily distinguishable. Examples include solutions, such as saltwater or air.

On the other hand, a heterogeneous mixture has an uneven distribution of its components, and its individual substances can be easily identified. Examples include sand and water, or oil and water.

One key distinction between a pure substance and a mixture is that a pure substance has a fixed composition, while the composition of a mixture can vary. This means that mixtures can be separated into their individual components through physical processes like filtration, evaporation, or distillation, without undergoing any chemical changes.

In summary, a pure substance is a single type of matter with a definite and uniform composition, while a mixture consists of two or more substances that are combined in the same place, but each substance retains its individual properties. Mixtures can be homogeneous or heterogeneous and can be separated into their components through physical methods.

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The correct answer is B: Temperature and activation energy are the factors that affect the rate constant according to the Arrhenius equation.

According to the Arrhenius equation, which describes the relationship between the rate constant (k) of a chemical reaction and temperature, changing the factors of temperature and activation energy will affect the rate constant.

The Arrhenius equation is given by:

k = A * e^(-Ea/RT),

where k is the rate constant, A is the pre-exponential factor or the frequency factor, Ea is the activation energy, R is the ideal gas constant, T is the temperature in Kelvin, and e is the base of the natural logarithm.

From the equation, it is evident that the rate constant is directly influenced by temperature and activation energy. Increasing the temperature results in a higher rate constant, as the exponential term in the equation becomes larger. This is because higher temperatures provide more kinetic energy to the reacting molecules, leading to more frequent successful collisions and increased reaction rates.

Similarly, the activation energy affects the rate constant. A higher activation energy results in a lower rate constant, as the exponential term becomes smaller. Activation energy represents the energy barrier that reactant molecules must overcome to form products. A higher activation energy implies a slower reaction rate. option(B)

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Answer:

D. It's the only one with C6H14 on the reactant side.

Explanation:

Answer:

A high-pressure area, high, or anticyclone, is a region where the atmospheric pressure at the surface of the planet is greater than its surrounding environment. Winds within high-pressure areas flow outward from the higher pressure areas near their centers towards the lower pressure areas further from their centers.

Explanation:

Answer:

may you include the table and actual question? would love to help but I need clarity on what is being asked.

Explanation:

Answer:

K = 3.45

Explanation:

In the reaction:

SO₂(g) + NO₂(g) ⇄ SO₃(g) + NO(g)

And K is:

K = [SO₃] [NO] / [SO₂] [NO₂]

Where [] are concentrations in equilibrium, as volume is 1L, [] could be taken as moles.

Equilibrium concentrations are:

[SO₂] = 2.00 moles - X

[NO₂] = 2.00 moles - X

[SO₃] = X

[NO] = X

AS moles of NO are 1.3 moles, X = 1.3 moles

Replacing:

[SO₂] = 0.7 moles = 0.7M

[NO₂] = 0.7M

[SO₃] = 1.3M

[NO] = 1.3M

K = 1.3M² / 0.7M²

The equilibrium constant is 3.5.

First of all we must obtain the equation of the reaction as follows;

SO₂(g) + NO₂(g) ⇄ SO₃(g) + NO(g)

Next we obtain the initial concentration of each specie;

SO₂(g) =  2.00 moles/1.00-L  = 2 M

NO₂(g)  =  2.00 moles/1.00-L  = 2 M

At equilibrium;

NO =  1.30 moles//1.00-L  = 1.3 M

The we set up the ICE table as follows;

          SO₂(g) + NO₂(g) ⇄ SO₃(g) + NO(g)

I          2             2                0          0

C        -x             -x               +x          +x

E       2 - x         2 - x            0 + x     0 + x

When x = 1.3

Concentration of each specie at equilibrium;

SO₂(g) = 2 - 1.3 = 0.7 M

NO₂(g) = 2 - 1.3 = 0.7 M

SO₃(g)  = 1.3 M

NO(g) M

K = (1.3)^2/(0.7)^2

K = 3.5

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Answer:

The specific heat capacity of the metal is 0.529 J/g · C.

Explanation:

To calculate the specific heat capacity of a metal, you can use the following formula:

c = Q / (m * ΔT)

Where c is the specific heat capacity of the metal, Q is the amount of heat required to change the temperature of the metal, m is the mass of the metal sample, and ΔT is the change in temperature.

In your case, the amount of heat required to change the temperature of the metal is 481 J, the mass of the metal sample is 17.0 g, and the change in temperature is 67°C - 25°C = 42°C. Plugging these values into the formula, we get:

c = 481 J / (17.0 g * 42°C) = 0.529 J/g · C

Therefore, the specific heat capacity of the metal is 0.529 J/g · C.

The specific heat capacity can be calculated using the calorimetric equation. The specific heat capacity of the metal is calculated to be 0.67 J/ °C g.

The specific heat capacity of a substance is the heat energy required to rise its temperature by one degree celsius per one gram of the substance. It is an intensive property.

The calorimetric equation connecting the heat energy q to mass m, temperature difference ΔT and specific heat c is given below:

q = m c ΔT

Given mass = 17 g

heat energy q = 481 J

temperature difference = 67 - 25 = 42° C

Then c = 481 / (17 g × 42° C ) =  0.67 J/ °C g.

Therefore, the specific heat of the metal is  0.67 J/ °C g.

.

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The net ionic equation for the reaction between aqueous (NH₄)₃PO₄ and aqueous  Zn(NO₃)₂ to form solid Zn₃(PO₄)₂ and aqueous NH₄NO₃ is:

Net ionic equations are equations that show only the reactant ions that are involved in the formation of a non-ionic product.

In a net ionic equation, the spectator ions or the ions which appear on both sides of the reaction are eliminated.

Considering the given reaction between aqueous (NH₄)₃PO₄ and aqueous  Zn(NO₃)₂ to form solid Zn₃(PO₄)₂ and aqueous NH₄NO₃:

The molecular equation is given below:

(NH₄)₃PO₄ (aq)  + Zn(NO₃)₂ (aq) ----> Zn₃(PO₄)₂ (s)  + NH₄NO₃ (aq)

The net ionic equation is:

PO₄³⁻ (aq)  + Zn²⁺ (aq) ----> Zn₃(PO₄)₂ (s)

The product  Zn₃(PO₄)₂ is insoluble and is obtained as a precipitate.

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Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

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Answer:

2.place value is 70 000 00

The reactions that result in the emission of light involve the ruthenium label and tripropylamine (TPA), two electrochemically active molecules.

Thus, The electrode surface inside the measurement cell is where the reactions take place.

The ruthenium label is oxidized at the electrode surface as an electrical potential is applied, and TPA is oxidized into a radical cation that spontaneously loses a proton.

When the resultant TPA radical interacts with oxidized ruthenium, the ruthenium label enters an excited state and emits a photon (620 nm) before decaying. The ruthenium label is renewed and ready to carry out numerous light-generating cycles as it goes back to its ground state.

Thus, The reactions that result in the emission of light involve the ruthenium label and tripropylamine (TPA), two electrochemically active molecules.

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Answer: 7.52*10^23 molecules.

Explanation: This is a classic Stoichiometry problem.

In one mole of any substance, there are 6.02*10^23 molecules. This number is called Avogadro's number. We are given 55 grams of Co2 so to convert that to moles, we divided by the molar mass of Co2. We find the molar mass by adding the molar masses of the elements that make up the compound.

There is one molecule of Carbon and two molecules of Oxygen in one molecule of Co2. From the periodic table, the molar mass of Carbon is 12.01 and 16.00 for Oxygen. 1(12.01)+2(16.00) gives us the molar mass. We then divided 55 grams by that mass to find the number of moles. We then multiply the number of moles by Avogadro's number (6.02*10^23) to find the total number of molecules.

You can use this method for solving any problem that asks you to find the number of atoms or molecules of some number of grams of a substance.

The increase in concentration of CO₂ will leads to form low pH of water because CO₂ is a acidic oxide. The temperature will also rising, this an organism that is experiencing an elevated carbon dioxide concentration most likely do.

The heat that is trapped aids in keeping the earth's temperature constant. However, the amount of heat trapped in the atmosphere will grow as CO₂ levels rise. Global warming is the process through which the earth's temperature rises as a result.

An immediate rise in CO₂ does not reduce respiratory oxygen consumption; rather, it increases with prolonged development in the field at increasing CO₂. Thus, the increase in concentration of CO₂ will leads to form low pH of water because CO₂ is a acidic oxide. The temperature will also rising, this an organism that is experiencing an elevated carbon dioxide concentration most likely do.

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The complete question is as follows:

Answer: The equation of the dissociation of the solution is given below:NaCH3COO -----> CH3COO- + Na+HA -----> A- + H+Using the equation of dissociation constant, Ka:Ka = [A-][H+]/[HA][H] = [A-][H+] = 10^-(pH)[H+] = 10^-9.44[H+] = 3.63 × 10^-10 MThus, [A-] = 3.63 × 10^-10 M[HA] = [A-][H+]/Ka[HA] = (3.63 × 10^-10 M)^2 / 1.8 × 10^-5[HA] = 7.32 × 10^-15 M

Therefore, the molarity of the sodium acetate (NaCH3COO) solution is 7.32 × 10^-15 M.

Explanation:

Answer:

The 2.8 hrs one i think???

hope this helps

Explanation:

Answer:

yee I'm excellent in maths and science

Answer:

1.E25 it is the answer the answer to mass of 1×10^25 molecules of water​

Explanation:

this is just EXPLINATION find your answer using this

first divide the number of molecules by Avogadro's number 6.022*10^25

you will

l get no. of Moles of water

multiply the no. of Moles with mass of 1 Mole of water 18g per mole

if get answer you comment

you should try on your own you will understand better

the correct answer is 20g of MgO contains 0.5 moles

Amount of MgO, w = 20g

Molar mass of MgO, M = (24+16)g mol-¹ = 40g mol-1

To find:

No. of moles of MgO in 20g, n = ?

We know that,

No. of moles = given mass(w) molar mass(M)

:: no. of moles in 20g of MgO, n = 20g 40gmol-1 → n = 0.5 mol

The molar mass of a complex mixture is determined by dividing its weight by the amount of that chemical, represented as the number of moles in the test, expressed in moles. The molar mass of a material is a bulk characteristic instead of a molecular one.

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Answer:

In image :)

Explanation:

In image :)

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

If you're attempting to synthesize 2 benzyl pentanoic acid from acetoacetic ester, keep in mind that you can do so fairly quickly by following these simplified instructions:

From its pungent free scent to its solid state at temperatures ranging from 118 120°C, acetoacetic ester (better known as ethyl acetoacetate) offers significant value for those working within organic synthesis.

As one of many potent ketones utilized by researchers around the globe its unique properties make it ideal for building complex molecules essential for modern medicine and more.

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Answer:

9.24

Explanation:

-logofH

The molarity of NaOH solution that required 20.15mL is 0.0004032M.

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

Molarity of a solution can be calculated by dividing the number of moles in the solution by the volume as follows:

Molarity = no of moles ÷ volume

According to this question, 0.325g of KHP required 20.15ml of NaOH for neutralization. The number of moles in this mass can be calculated as follows:

no of moles = 0.325g ÷ 40g/mol

no of moles = 0.008125mol

Molarity = 0.008125mol ÷ 20.15mL

Molarity = 0.0004032M

Therefore, 0.0004032M is the molarity of the solution.

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The concentration of H3O+  of 0.25 M NH4 Cl is calculated as 1.13 × 10⁻⁵ M.

Hydronium ion concentration is found from pH by reverse of the mathematical operation that is employed to find pH.

NH4Cl + H2O → NH4+ + Cl- + H2O

NH4+ + H2O → H3O+ + NH3

Ka = [H3O+][NH3] / [NH4+]

[NH4+] = 0.25 M - x

At equilibrium, the concentration of NH3 will also be equal to x (since NH4+ and NH3 are in a 1:1 ratio). The concentration of H3O+ will also be equal to x (since NH4+ donates a proton to form H3O+).

5.6 × 10-10 = (x)(x) / (0.25 - x)

x = 1.13 × 10⁻⁵ M

Therefore, the concentration of H3O+ is 1.13 × 10⁻⁵ M.

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The percent composition of CuBr₂ is approximately 28.46% of Cu and 71.54% of Br.

To determine the percent composition of CuBr₂ (copper(II) bromide), we need to calculate the mass of each element in the compound and then divide it by the molar mass of the entire compound.

The molar mass of CuBr₂ can be calculated by adding up the atomic masses of copper (Cu) and bromine (Br) in the compound. The atomic masses of Cu and Br are approximately 63.55 g/mol and 79.90 g/mol, respectively.

Molar mass of CuBr₂ = (63.55 g/mol) + 2(79.90 g/mol) = 223.35 g/mol

Now, let's calculate the percent composition of each element in CuBr₂:

Percent composition of copper (Cu):

Mass of Cu = (63.55 g/mol) / 223.35 g/mol × 100% ≈ 28.46%

Percent composition of bromine (Br):

Mass of Br = 2(79.90 g/mol) / 223.35 g/mol × 100% ≈ 71.54%

Therefore, the percent composition of CuBr₂ is approximately:

- Copper (Cu): 28.46%

- Bromine (Br): 71.54%

These values represent the relative mass percentages of copper and bromine in the compound CuBr₂.

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The human population grew from 1 billion in the year 1800 to approximately 7.8 billion in the year 2021.

In the year 1800, the estimated global human population was around 1 billion. Over the next two centuries, significant advancements in technology, medicine, agriculture, and improved living conditions contributed to a rapid increase in population.

The growth rate of the human population began to accelerate in the 20th century. By the year 1927, the global population reached 2 billion. It took just 33 years for the population to double, reaching 4 billion in 1960. The population continued to grow at an unprecedented rate, with 6 billion people on Earth by the year 1999. As of 2021, the estimated global population stands at approximately 7.8 billion.

This remarkable growth in population can be attributed to several factors, including advancements in healthcare leading to reduced infant mortality rates, improved access to education and contraception, increased agricultural productivity, and overall socio-economic development.

It's important to note that population growth has not been uniform across all regions. Different countries and regions have experienced varying rates of population growth due to factors such as fertility rates, mortality rates, migration patterns, and government policies.

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Answer:

C

Explanation:

Reactant part has 2 Mg and 2 O, product part has 2 Mg and 2 O