3. In a neutral solution, the [H+] is
zero
O 10-14M
O equal to [OH-]
O
1 x 107M

Explanation:

they helped in discovering the atomic structure of elements making it easy to discover elements and their composition

Answer:

high melting point

Explanation:

high melting point

Answer:

2H2+ 02-->2H20

So 4H2 + 202-->4H20

so the answer is 4 water molecules.

Answer:

725000

Explanation:

hope you find this helpfull

Answer:

Atoms of sulfur = 9.60⋅g32.06⋅g⋅mol−1×6.022×1023⋅mol−1

Explanation:

because the units all cancel out, the answer is clearly a number, ≅2×1023 as required.

You can fill in the table for other elements and their respective isotopes by determining the appropriate number of protons, neutrons, and electrons based on the given isotope mass number and atomic number.

To accurately fill in the table with the correct number of subatomic particles for the elements given the isotope mass number, we need to consider the composition of atoms and their respective subatomic particles. Atoms are composed of protons, neutrons, and electrons.

The number of protons in an atom is equivalent to its atomic number, which uniquely identifies the element. The number of neutrons can be determined by subtracting the atomic number from the isotope mass number. Electrons in a neutral atom are equal to the number of protons.

Let's take an example using the isotope mass number:

Isotope: Carbon-14 (mass number = 14)

Element: Carbon (atomic number = 6)Based on the atomic number and isotope mass number, we can determine the number of subatomic particles as follows:

Protons: 6 (same as the atomic number)

Neutrons: 14 - 6 = 8

Electrons: 6 (same as the number of protons in a neutral atom)

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To produce 35.5g of H2, approximately 2055.49g of NaCl is required.

To calculate the mass of NaCl required to produce 35.5g of H2, we need to determine the stoichiometry of the reaction and use the molar mass of NaCl.

The balanced equation for the reaction is:

2NaCl + 2H2O -> 2NaOH + H2

From the balanced equation, we can see that for every 2 moles of NaCl, 1 mole of H2 is produced. We can use the molar mass of H2 (2.016g/mol) to convert the given mass of H2 into moles:

moles of H2 = mass of H2 / molar mass of H2

moles of H2 = 35.5g / 2.016g/mol

moles of H2 = 17.6 mol

Since the stoichiometry of the reaction is 2 moles of NaCl to 1 mole of H2, we can set up the following ratio:

moles of NaCl / moles of H2 = 2 / 1

Rearranging the equation to solve for moles of NaCl:

moles of NaCl = (moles of H2 * 2) / 1

moles of NaCl = (17.6 mol * 2) / 1

moles of NaCl = 35.2 mol

Now, we can calculate the mass of NaCl required using the molar mass of NaCl (58.44g/mol):

mass of NaCl = moles of NaCl * molar mass of NaCl

mass of NaCl = 35.2 mol * 58.44g/mol

mass of NaCl = 2055.49g

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Answer:

its A layer c is younger than layer A

Explanation:

Layer C is younger than layer A in the given image. Therefore, the correct option is option A.

Rock is a naturally occurring mineral aggregate that is cohesive and composed of one or maybe more minerals. These aggregates often take the shape of recognisable and mappable volumes and are the fundamental building block of the solid Earth. Depending on the processes that led to the development of a rock, it is typical to classify rocks into three major categories.

Three types of rocks fall into these categories: igneous rocks, which are made of molten rock known as magma; sedimentary rocks, which are made of rock fragments or materials that have precipitated from remedies; and metamorphic rocks, which are created when either sedimentary or igneous rocks undergo certain processes. Layer C is younger than layer A in the given image.

Therefore, the correct option is option A.

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Answer:

see full answer in below

Explanation:

Convection occurs when heat is transferred through a fluid, such as air or water. Heat is transferred by three main mechanisms: conduction, convection, and radiation. Convection occurs when the molecules of a fluid are heated, causing them to move faster and become less dense. This causes the warmer, less dense fluid to rise above the cooler, denser fluid, creating a convection current. This current transfers energy from the warmer fluid to the cooler fluid, allowing heat to be transferred throughout the system.

Answer:

No, they would not be balanced because their weights would change.

Explanation:

Weight is the effect that gravitational pull has on objects on Earth whereas mass is how much matter there is in an object. Mass does not change despite gravitational pull, but the force of gravity (weight) is different depending on where you are.

Answer:

\(p[H+] = 10.042\)

Explanation:

As we know that

\(pKw = pH + pOH\)......eq (1)

we will calculate the pH of OH- and then we will calculate the pH of H+

So p[OH-] \(= - log [1.10 * 10^{-4}]\)

Solving the right side of the equation, we get

p[OH-]

\(= - [-3.958]\\= 3.958\)

Now we know that

\(pKw = 14.0\)

Substituting the value of pOH in the above equation, we get -

\(14.0 = p[H+] + 3.958\\p[H+] = 14 - 3.958\\p[H+] = 10.042\)

A symbol represents an individual element, while a molecular formula represents the composition of a molecule.

A symbol is a shorthand representation of an element. It consists of one or two letters, typically derived from the element's name. Symbols are used to identify and represent individual atoms of elements. For example, "H" represents hydrogen, "C" represents carbon, and "O" represents oxygen. Symbols are often combined to form chemical formulas.

A molecular formula, on the other hand, represents the actual composition of a molecule. It provides the type and number of atoms present in a compound. Molecular formulas are used to describe the ratio of different atoms in a molecule.

They provide information about the number of atoms of each element in a compound. For example, the molecular formula of water is \(H_2O\), which indicates that a water molecule consists of two hydrogen atoms and one oxygen atom.

In summary, symbols represent individual elements, while molecular formulas represent compounds by indicating the types and numbers of atoms present in a molecule. Symbols are used to represent elements in the periodic table, while molecular formulas provide a concise representation of the composition of chemical compounds.

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The complete chemical equation for cellular respiration is:

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy

In this equation, glucose (C₆H₁₂O₆) is combined with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O). The process of cellular respiration occurs in the mitochondria of cells and involves the breakdown of glucose to release energy in the form of ATP (adenosine triphosphate).

During cellular respiration, glucose is oxidized to form carbon dioxide, and oxygen is reduced to form water. This process releases energy that is stored in ATP molecules and is used by cells to carry out various metabolic activities.

Overall, cellular respiration is a vital process in organisms to generate energy for cellular functions and is essential for the survival and functioning of living organisms.

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Answer:

1.76 g/ml

Explanation:

98.7 / 56.1 = 1.7593582888

Round to the nearest hundredth = 1.76

Answer:

Are you studying?..............

Explanation:

lol

Answer:

valence electrons get closer but rest of them are remain same

Answer:

Vertebrate Endocrine Glands and Hormones

Unlike plant hormones, animal hormones are often (though not always) produced in specialized hormone-synthesizing glands (shown below). The hormones are then secreted from the glands into the blood stream, where they are transported throughout the body.

The bond enthalpy of the N-N triple bond is 418kj/mol. The correct statement about the N2 molecule is correct is that It requires less energy to break the bonds in molecule A than it does in molecule B.

A molecule is described as a group of two or more atoms held together by attractive forces known as chemical bonds

In chemistry, bond energy (E) or bond enthalpy (H) is the measure of bond strength in a chemical bond which means that the higher the bond enthalpy, the more energy is needed to break the bond and the stronger the bond.

The lower the bond enthalpy, the lesser energy is needed to break the bond and the weaker the bond.

So we can say that the e correct option is A. Since A has a lower energy value compared to B, it would take a lesser amount of energy to break the bonds in A.

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#completye question:

The bond enthalpy of the N-N triple bond is 418kj/mol. Which statement about the N2 molecule is correct?​

A. It requires less energy to break the bonds in molecule A than it does in molecule B.

B.It requires more energy to break the bonds in molecule A than it does in molecule B.

C. Molecule A is more stable than molecule B.

D. Molecule A has stronger bonds than molecule B.

The new volume V₂ of the balloon is 266 cm³.

The experimental gas law known as Charles' law describes how gases tend to expand when heated. The law of volumes is another name for it.

According to Charles's law,

V₁/T₁ = V₂/T₂

In question it has been given,

V = Volume

T = Temperature

V1 = 494cm3

T1=455k

T2=245k

V2 ( New Volume of Balloon)=?

Charles's law formula is :  = V₁/T₁ = V₂/T₂

Putting values in Formula of charles's law

V₁/T₁ = V₂/T₂

= 494 / 455 = V₂/ 245

Cross Multiply each other,

V₂×455K= 494 cm³×245K

V₂ =494cm³×245K÷455K

V₂ = 266 cm³

Hence, the new volume of the balloon is 266 cm³

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If the zero is located in the RHP and the poles are located in the LHP, it is possible that the process will exhibit an inverse response based on the transfer function G(s) = K(Tzs + 1) / ((115 + 1)(T25 + 1)).

To determine when the process will possess an inverse response based on the given transfer function G(s) = K(Tzs + 1) / ((115 + 1)(T25 + 1)), we need to analyze the characteristics of the transfer function.

In a transfer function, an inverse response occurs when the sign of the phase angle changes by 180 degrees or π radians as the frequency increases. Mathematically, this corresponds to a pole and a zero that are located in the right-half plane (RHP) of the complex plane.

From the given transfer function G(s) = K(Tzs + 1) / ((115 + 1)(T25 + 1)), we can observe the following:

The numerator of the transfer function has a single zero, which is given by (Tzs + 1).

The denominator of the transfer function has two poles, which are given by ((115 + 1)(T25 + 1)).

To determine the location of the poles and zeros, we need specific values for T, z, and K. Without those values, we cannot determine the exact location of the poles and zeros or whether they lie in the RHP.

However, in general, if the zero (Tzs + 1) is located in the RHP and the poles ((115 + 1)(T25 + 1)) are located in the left-half plane (LHP), the transfer function may possess an inverse response. The presence of a pole in the RHP and a zero in the LHP can lead to an inverse response behavior.

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Answer:

B

Explanation:

Answer:

The answer is P(AR) 27Kpa

To answer your question, we first need to understand that NH4Cl is a salt that dissociates in water, producing NH4+ and Cl- ions. However, NH4+ can also act as an acid and donate a proton to water, producing H3O+. Therefore, we need to consider the equilibrium reactions that occur in the solution of NH4Cl.

NH4+ + H2O ⇌ NH3 + H3O+

In this reaction, NH4+ is acting as an acid and donating a proton to water, producing NH3 and H3O+. The equilibrium constant for this reaction is called the acid dissociation constant (Ka) for NH4+ and is given by:

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

Since NH4Cl dissociates completely in water, the initial concentration of NH4+ is equal to the concentration of NH4Cl, which is 0.060 M. We can assume that the concentration of NH3 produced is negligible compared to the initial concentration of NH4+, so we can simplify the equilibrium expression to:

Ka = [H3O+] / [NH4+]

Substituting the given value for Ka (5.6 x 10^-10) and the initial concentration of NH4+ (0.060 M) into the equation, we get:

5.6 x 10^-10 = [H3O+] / 0.060

Solving for [H3O+], we get:

[H3O+] = 6.6 x 10^-6 M

Therefore, the [H3O+] in 0.060 M NH4Cl is 6.6 x 10^-6 M.

In summary, the [H3O+] in a solution of NH4Cl can be calculated using the acid dissociation constant (Ka) for NH4+. Since NH4+ can act as an acid and donate a proton to water, we need to consider the equilibrium reaction between NH4+ and H2O. The [H3O+] can then be calculated using the initial concentration of NH4+ and the value of Ka. The calculated value for [H3O+] in 0.060 M NH4Cl is 6.6 x 10^-6 M.

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