A burner on a stove produces?

Answer:

Explanation:

The number of molecules can be found by using the formula

N = 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 = 3 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Answer: OB. 1.806 x 1024

Explanation:

Answer: The coefficient for water after the equation is balanced is 2.

Explanation:

The balanced chemical equation must have same charge and same number of atoms on both sides of the equation.

As the given reaction is a redox recation occuring in acidic medium.

\(HNO_3+3Fe^{2+}+3H^+\rightarrow NO+3Fe^{3+}+2H_2O\)

The coefficient for water will be 2 after the equation is balanced.

The bonds between the atoms of an item or substance store elastic energy. When these bonds are under stress, they absorb energy and release it when they are relaxed.

Elastic energy is the mechanical potential energy held in a material's or a physical system's configuration while it is subjected to elastic deformation as a result of work being done on it.

Elastic energy is created when things are momentarily crushed, stretched, or otherwise distorted. Calculations of mechanical equilibrium locations using the elastic potential energy equation.

The energy is potential because when the item is permitted to return to its original shape by its elasticity, it will change into other types of energy, such as kinetic energy and sound energy.

Thus, The bonds between the atoms of an item or substance store elastic energy.

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Total electrons in fluorine (F): 9. Valence electrons in fluorine (F):7.

The element fluorine (F) is located in the periodic table in Group 17, also known as Group VIIA or the halogens. Fluorine has an atomic number of 9, indicating that it contains 9 electrons in its neutral state.

To determine the total number of electrons in a neutral atom of fluorine, we refer to its atomic number, which corresponds to the number of protons and electrons in an atom. Thus, fluorine has a total of 9 electrons.

Valence electrons are the electrons in the outermost energy level, also known as the valence shell, of an atom. For fluorine, the valence electrons are found in the second energy level, specifically in the 2p orbital. Since the second energy level can accommodate a maximum of 8 electrons, fluorine has 7 valence electrons.

Valence electrons play a crucial role in chemical bonding and determining the reactivity of an element. In the case of fluorine, its 7 valence electrons make it highly reactive, as it only needs one additional electron to achieve a stable, full outer electron configuration of 8 electrons. This strong desire to gain an electron makes fluorine one of the most electronegative elements on the periodic table.

In summary, a neutral atom of fluorine (F) has a total of 9 electrons, with 7 of them being valence electrons located in the 2p orbital.

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The new volume of the balloon after heating it to a temperature of 51 °C is approximately 2.39 L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Given that:

Substituting the given values and solve for V₂:

\(V_1T_2 = V_2T_1\\\\V_2 = \frac{V_1T_2}{T_1} \\\\V_2 = \frac{2.2\ *\ 324.15}{298.15 }\\ \\V_2 = 2.39 \ L\)

Therefore, the final volume is 2.39 litres.

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Answer:

The angle of the Sun is lower during the winter months and higher in the sky during the summer.

Explanation:

i took the test

Answer:

solid to gaseous or gaseous to solid

Explanation:

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water.

Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the  pH of a 0.01 M acetic acid.

Any hydrogen that comprises a material capable of giving a proton (a hydrogen ion) to another chemical is defined as acid. A base is indeed a molecule or ion that can receive a hydronium ion from just an acid.

1)Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. The pH value of stronger acid is lower.

2)CH\(_3\)COOH + H\(_2\)O  ⇄ CH\(_3\)COO⁻+  H\(_3\)O⁺

 0.01             0               0

 -x              +x                +x

 0.01-x           +x        +x

Ka=[ CH\(_3\)COO⁻][H\(_3\)O⁺]/[CH\(_3\)COOH]

1.8×10⁻⁵ = [x][x ]/[  0.01-x ]

x=1.34×10⁻³

pH = -log[H⁺]

     =  -log[1.34×10⁻³]

     =2.88

Therefore, because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the   pH of a 0.01 M acetic acid.

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Solution :

Structure I

The formal charge on both Carbon (C) atom is = 4 valance \($e^-$\) - bonds = 0

Formal charge (O) = 6 V.E - 2 bonds - 4 non bonding electrons = 0

Formal charge on (N) = 5 V.E - 3 bonds - 2 non bonding electrons = 0

F.C. on H = 1 V.E. - 1 bond = 0

Overall charge on the molecule = 0 charge

Structure II

Formal charge on both C atom = 4 valence \($e^-$\) - 4 bonds = 0

Formal charge (O) = 6 V.E. - 1 bonds - 6 non bonding electrons = -1 charge

Formal charge on (N) = 5 V.E. - 4bonds - 0 non bonding electrons = +1 charge

F.C on H = 1 V.E. - 1 bond = 0

Overall charge on the molecule = +1 -1

                                                     = 0 charge

The atomic radius trend on the Periodic Table is as follows:

- Atomic radius increases down a column (or group)

- Atomic radius decreases across rows (or periods) from left to right

Looking at my Periodic Table, calcium, chromium, cobalt and copper are in that order from left to right in the same period, which simplifies things significantly.

Since these elements are in the same period, and given that we know atomic radius decreases across periods from left to right, we can see that calcium has the largest atomic radius.

Answer:

i'm not sure which one it is but i know that the answer that is up there is not correct i just took this quiz today so just don't answer this one.=)

Explanation:

The lack of auxins will affect the growth of a plant as plants would not be able to grow and bend towards direct sunlight.

AUXIN:

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Answer:

1.09

Explanation:

Keep in mind that the volume of the solution changes during this titration, so to compute the amount of hydronium that is neutralized during this addition of base (in order to calculate the final pH of the solution), we must calculate the moles of all species in solution initially present. Because both NaOH and HCl ionize completely:initial mol OH−=mol NaOH=(0.0050 L)(0.10 molL)=0.00050 mol OH−initial mol H3O+=mol HCl=(0.050 L)(0.10 molL)=0.0050 mol H3O+The acid is in excess, so all of the OH− present will neutralize an equivalent amount of H3O+, forming water. Thus we simply subtract the moles of hydroxide from the moles of hydronium in solution to find the resultant moles of H3O+ after this neutralization:final mol H3O+= initial mol H3O+−initial mol OH−final mol H3O+=0.0050 mol−0.00050 mol=0.0045 mol H3O+We now calculate the total volume of the solution by adding the volumes of acid and base initially combined: 0.050 L+0.0050 L=0.055 LTo get [H3O+], we divide the final moles of hydronium by the final solution volume:[H3O+]=final mol H3O+ total volume=0.0045 mol0.055 L≈0.08181molLFinally, to find pH:pH=−log[H3O+]=−log(0.08181)=1.09Since the hydronium concentration is only precise to two significant figures, the logarithm should be rounded to two decimal places.

The mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur .

The molecular formula of Aluminum Sulfate is \(Al_2(SO_4)_3.\) In one molecule of aluminum sulfate, there are 3 sulfur atoms. To calculate the mass of aluminum sulfate, follow the steps below:

Step 1: Calculate the molar mass of aluminum sulfate using the periodic table.Al = 27.0 g/molS = 32.1 g/molO = 16.0 g/mol

(2 × Al) + (3 × S) + (12 × O) = molar mass of \(Al_2(SO_4)_3.\) = 342.2 g/mol

Step 2: Find the number of moles of sulfur in the given number of atoms of sulfur.2\(2.837*10^{26\) atoms of sulfur × 1 mol S/\(6.022 * 10^{23\)atoms S = 0.0470 mol S

Step 3: Use the molar ratio of sulfur to aluminum sulfate to calculate the number of moles of aluminum sulfate.1 mol \(Al_2(SO_4)_3.\) / 3 mol S = 0.333 mol\(Al_2(SO_4)_3.\) per mol S0.0470 mol S × 0.333 mol \(Al_2(SO_4)_3.\)/mol S = 0.0157 mol \(Al_2(SO_4)_3.\)

Step 4: Calculate the mass of aluminum sulfate.0.0157 mol \(Al_2(SO_4)_3.\) × 342.2 g/mol\(Al_2(SO_4)_3.\)= 5.373 g\(Al_2(SO_4)_3.\)

Therefore, the mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur.

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The type of movement that occurs in the plate movement listed above include the following:

These are gigantic pieces of the Earth's crust and uppermost mantle and are made up of oceanic crust and continental crust.

A convergent boundary as the name implies occurs when lithospheric plates are moving towards one another.

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The volume of 2.63×10-² M barium hydroxide required to neutralize 16.1 mL of a 0.110 M nitric acid solution is 67.34mL.

The volume of a substance can be calculated using the following expression:

CaVa = CbVb

Where;

According to this question, 2.63×10-² M barium hydroxide is required to neutralize 16.1 mL of a 0.110 M nitric acid solution.

0.0263 × Va = 16.1 × 0.110

0.0263Va = 1.771

Va = 67.34mL

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The thickness of the aluminum is approximately 0.00172 cm or 0.0172 mm

To calculate the thickness of the aluminum, we need to use the formula:

Density = Mass / (Length x Width x Thickness)

Given:

Mass of aluminum = 0.475 g

Length of aluminum = 10.08 cm

Width of aluminum = 10.08 cm

We need to rearrange the formula to solve for thickness:

Thickness = Mass / (Length x Width x Density)

The density of aluminum is approximately 2.7 g/cm³.

Now we can substitute the given values into the formula:

Thickness = 0.475 g / (10.08 cm x 10.08 cm x 2.7 g/cm³)

Thickness ≈ 0.475 g / (102.4064 cm² x 2.7 g/cm³)

Thickness ≈ 0.475 g / 275.879104 cm³

Thickness ≈ 0.00172 cm or 0.0172 mm

Therefore, the thickness of the aluminum is approximately 0.00172 cm or 0.0172 mm.

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Answer:

\(Ksp=[Zn^{2+}]^3[PO_4^{3-}]^2\)

Explanation:

Hello,

In this case, since the equilibrium dissociation of zinc phosphate is:

\(Zn_3(PO_4)_2(s)\rightleftharpoons 3Zn^{2+}(aq)+2(PO_4)^{3-}(aq)\)

Due to the fact that only the zinc and phosphate ions are in aqueous state, the solubility product expression is written considering the law of mass action in which the concentration of each species is powered to the corresponding stoichiometric coefficient as follows:

\(Ksp=[Zn^{2+}]^3[PO_4^{3-}]^2\)

Best regards.

To calculate the concentration of hydrogen ions ([H+]) from the pH of a solution, you can use the following formula:

[H+] = 10^(-pH)

Let's apply this formula to determine the [H+] for a solution with a pH of 5.4:

[H+] = 10^(-5.4)

Calculating this using a scientific calculator or mathematical software, we get:

[H+] ≈ 3.981 x 10^(-6) mol/L

Therefore, the concentration of hydrogen ions in the solution is approximately 3.981 x 10^(-6) mol/L.

The concentration of hydrogen ions in the solution is approximately 2.51 × 10^(-6) mol/L.

To calculate the concentration of hydrogen ions ([H+]) in a solution based on its pH, we can use the formula:

[H+] = 10^(-pH)

Given that the pH of the solution is 5.4, we can substitute this value into the formula:

[H+] = 10^(-5.4)

Using a scientific calculator or logarithmic tables, we can evaluate this expression:

[H+] ≈ 2.51 × 10^(-6) mol/L

Therefore, the concentration of hydrogen ions in the solution is approximately 2.51 × 10^(-6) mol/L.

To clarify the calculation, we take the negative logarithm (base 10) of the hydrogen ion concentration to obtain the pH value. In this case, we are given the pH and we use the formula in reverse to determine the hydrogen ion concentration [H+]. The result indicates that the solution has a relatively low concentration of hydrogen ions.

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B: It has fewer than 10 total watersheds best describes

A watershed is the area of land where all of the water that falls in it and drains off of it goes to a common outlet. All the land drains water into rivers that drain into the Chesapeake Bay, where it enters the Atlantic Ocean.

The area that drains into a single river is the watershed for that river.

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Answer:

3 mole O2

Explanation:

Need balanced equation first:  O2 + 2SO2 --> 2SO3

assuming SO2 is in excess,

1.5 mol O2 (2moles SO3/1mole O2) = 3 mole O2

Answer:

through Decantation

Explanation:

Decantation: Decantation is pouring out of upper clear layer of liquid into another container to separate two immiscible liquids or to separate different substances in a suspension mixture.

Therefore, we could use decantation once the sand particles settle down by gently pouring the water into another container. Once the water is transfered, we'll be left with sand in the bottom of the first container.

Hope that helps...

Answer:

Voltage is the measure of electric potential energy per unit charge, current is the flow of electric charge through a circuit, and resistance is the property of a material that opposes the flow of electric current.

Ohm's Law relates these three concepts by stating that current is directly proportional to voltage and inversely proportional to resistance.

Hope this helps!

They appear as the trait over a recessive allele. Statement C) is true about the dominant alleles.

Dominant alleles are genetic variants that, when present in an individual's genotype, are expressed phenotypically, meaning they determine the visible or observable traits. Dominant alleles are represented by capital letters, while recessive alleles are represented by lowercase letters in genetics.

In terms of inheritance, if an individual has at least one copy of the dominant allele, it will be expressed in the phenotype, regardless of the presence of a recessive allele. This is because dominant alleles exert their influence over recessive alleles, thus "dominating" their expression.

To illustrate this, let's consider a specific example using a trait controlled by a single gene with two possible alleles: dominant (A) and recessive (a). If an individual is homozygous dominant (AA), meaning they possess two copies of the dominant allele, the dominant trait will be expressed.

However, if an individual is homozygous recessive (aa), with two copies of the recessive allele, the recessive trait will be expressed since there are no dominant alleles to override it.

Therefore, dominant alleles appear as the trait over recessive alleles, regardless of the presence or absence of a recessive allele. The presence of even a single copy of the dominant allele is sufficient for its expression in the phenotype. Option C

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The volume that 0.33 mole of H2 gas will occupy at 135 kPa and 14.2 C is  0.0575.

This law deals with the macroscopic properties of  ideal gas.

By the formula of ideal gas

PV = nRT

Given, the moles is 0.33 mole

Pressure is 135 kpa

Temperature is 14.2 C int kelvin is 287 K

R is constant

Putting the values in the equation

135 x V = 0.33 x 0.08206 x 287

V = 0.0575

Thus, the volume is 0.0575.

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Answer:

elment ? atómic 71⁰349⁹⁰291