how many protons, neutrons, and electrons are in a neutral hydrogen atom? in a neutral helium atom? how many times heavier is the he atom compared to the h atom?

The reaction between 2-methyl-2-pentanol and sulfuric acid to yield 2-methyl-2-pentene goes via an elimination reaction

Elimination reactions are those that proceed by the removal of one or more atoms or functional groups from the reactants, resulting in the formation of a new double bond or π bond in a product. An example of an elimination reaction is the dehydration of alcohols.In this particular reaction, 2-methyl-2-pentanol (an alcohol) reacts with sulfuric acid to produce 2-methyl-2-pentene, which is an alkene.

The reaction mechanism proceeds via an elimination reaction, where the OH group and a hydrogen ion (H+) are removed from the reactant, resulting in the formation of a double bond between the adjacent carbon atoms in the product.The reaction can be represented as follows:CH3C(CH3)2CH(OH)CH3 + H2SO4 → CH3C(CH3)2C=CH2 + H2O + H2SO4In conclusion, the reaction between 2-methyl-2-pentanol and sulfuric acid to yield 2-methyl-2-pentene goes via an elimination reaction.

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Explanation:

From periodic table:  

Zn = 65.38    gm/mole         X 3 =196.14  

P= 30.974

O = 15.999                           X 4 =63.996

Total mole wt = 291.11  gm     of which  196.14 is Zn

196.14 / 291.11 x 100% = 67% Zn

(NOTE that the sample mass of 25.5 g is irrelevant)

Answer:

Know locations of laboratory safety showers, eyewashstations, and fire extinguishers. ...

Know emergency exit routes.

Avoid skin and eye contact with all chemicals.

Minimize all chemical exposures.

No horseplay will be tolerated.

Assume that all chemicals of unknown toxicity are highly toxic.

More items...

Explanation:

Answer:

1

Explanation:

Octet meaning 8. So if chlorine already has 7 valence electrons it will only need to get 1 more to be satisfied.

ionization, in chemistry and physics, any process by which electrically neutral atoms or molecules are converted to electrically charged atoms or molecules (ions) through gaining or losing electrons.

Ionization is one of the principal ways that radiation, such as charged particles and X rays, transfers its energy to matter.

1. Comparison of energy loss by ionization and radiation in Beta particles of energy 6 MeV in tungstenIonization is a process in which an atom or a molecule loses its one or more electrons. It is the main process which is responsible for energy loss in the case of Beta particles. Radiation is another process which is responsible for energy loss in Beta particles. It is due to the production of photons.The energy loss due to ionization can be calculated by using the following formula:$$-\left(\frac{dE}{dx}\right)_{ion} = Kz^2\frac{n_e}{v^2}$$Where, K is a constant, z is the atomic number of the medium, $n_e$ is the electron number density of the medium, v is the velocity of Beta particles.

By using the values of these constants, we can calculate the energy loss due to ionization. It is given by$$\left(\frac{dE}{dx}\right)_{ion} = 0.153 \frac{z^2}{A}\frac{1}{\beta^2} \qquad\qquad (1)$$Where, A is the atomic mass of the medium, β is the velocity of Beta particles. If we substitute the values of tungsten, whose atomic number is 74, and β=1, we get$$\left(\frac{dE}{dx}\right)_{ion} = 3.59\times10^3 \, \text{MeV/cm} \qquad\qquad (2)$$The energy loss due to radiation can be calculated by using the following formula:$$-\left(\frac{dE}{dx}\right)_{rad} = Kz^2\frac{n_e}{v^2} Z$$Where, Z is the atomic number of the medium. By substituting the values of constants, we get$$\left(\frac{dE}{dx}\right)_{rad} = 2.07 \times 10^{-5}\, \text{MeV/cm} \qquad\qquad (3)$$By comparing equation 2 and 3, we can see that the energy loss due to ionization is much higher than that of the energy loss due to radiation. Therefore, it can be concluded that ionization is the dominant process that causes energy loss in Beta particles.

2. Classification of neutrons according to their energy Neutrons can be classified into the following types based on their energy types:

1 Giga Electron volt > 3 MeV > 0.6 MeV > 200 eV > 0.09 eV.

Therefore, the classification of neutrons based on their energy is given below

1:Neutrons of energy 1 Giga Electron voltType

2: Neutrons of energy 3 MeVType

3: Neutrons of energy 0.6 MeVType

4: Neutrons of energy 200 eVType

5: Neutrons of energy 0.09 eV

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Answer:

Jupiter would have the strongest gravitational pull on a satellite.

Gravity is directly proportional to mass.

Jupiter is the most massive, so it will have a stronger gravitational pull.

Explanation:

Answer:

B

Explanation:

Because B is stable square both sides are equal

Answer:By their movement, by their wastes, and by their metabolic.

Explanation:The nutrient cycle is a system where energy and matter are transferred between living organisms and non-living parts of the environment. This occurs as animals and plants consume nutrients found in soil, and these nutrients are then released back into the environment via death and decomposition.

Answer:

A

Explanation:

its A because of how oxygen can come out of plants during the time of photosynthesis

Answer:

nah man

Explanation:

The balanced equation of the copper (II) hydroxide precipitation reaction can be written as follows;Cu(OH)2 (s) → Cu2+ (aq) + 2 OH- (aq)We can express the solubility product constant (Ksp) for this reaction in a mathematical equation as follows;Ksp = [Cu2+] [OH-]2

The balanced equation of the copper (II) hydroxide precipitation reaction can be written as follows;Cu(OH)2 (s) → Cu2+ (aq) + 2 OH- (aq)We can express the solubility product constant (Ksp) for this reaction in a mathematical equation as follows;Ksp = [Cu2+] [OH-]2

To find the correct solubility product constant for the reaction shown above, we must first determine the balanced chemical equation for the reaction. After writing the balanced equation, we can then identify the reactants and products present in the chemical reaction.

After identifying the products and reactants present, we can then write the expression for the solubility product constant (Ksp) for the chemical reaction. From the chemical equation shown above, the correct solubility product constant for copper (II) hydroxide (Cu(OH)2) precipitation reaction is given by;Ksp = [Cu2+] [OH-]2The answer is a mathematical equation and so it is not possible to provide a value in this case. Thus, the correct solubility product constant for the reaction shown above is expressed as Ksp = [Cu2+] [OH-]2.

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Answer:

49.18 eV hope this helps

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Fat-soluble vitamins are absorbed with dietary fats, require specific enzymes for absorption, are transported and stored in the body's fat tissues, and can be stored for longer periods. In contrast, water-soluble vitamins are directly absorbed into the bloodstream.

Fat-soluble vitamins and water-soluble vitamins differ in terms of their absorption and storage in the body.

Here are some key points:

Absorption:

Fat-soluble vitamins (such as vitamins A, D, E, and K) are absorbed along with dietary fats in the small intestine. They require the presence of bile acids and pancreatic enzymes for optimal absorption.

Water-soluble vitamins (such as vitamins C and B-complex vitamins) are absorbed directly into the bloodstream from the small intestine. They do not require fats or specific enzymes for absorption.

Transport and Storage:

Fat-soluble vitamins are transported through the bloodstream by carrier proteins and are primarily associated with lipids (fats). They can be stored in the body's fatty tissues and liver for future use.

Water-soluble vitamins are not stored to a significant extent in the body. Any excess amounts are typically excreted through urine. Therefore, regular intake of water-soluble vitamins is essential.

Storage Duration:

Fat-soluble vitamins can be stored in the body for longer periods since they are stored in fatty tissues and the liver. This storage allows the body to draw upon these reserves when dietary intake is insufficient.

Water-soluble vitamins are not stored in large quantities, and any excess amounts are quickly eliminated through urine. Consequently, a consistent intake of water-soluble vitamins is necessary to maintain optimal levels.

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The volume of the balloon is 6.24 L. The random motion of the gas particles is consistent with Newton's Laws of Motion.

the rule that states that the sum of the absolute temperature of the gas and the universal gas constant is equal to the product of the pressure and volume of a single gram of an ideal gas.

We can use the ideal gas law,

PV = nRT

P = pressure

V = volume

n = number of moles

R = gas constant

T = temperature

Now, we have to convert the temperature to Kelvin:

T = 2 + 273.15 = 275.15 K

We can substitute the values,

P = 0.5 atm

n = 0.48 mol

R = 0.08206 L·atm/(mol·K)

T = 275.15 K

PV = nRT

V = (nRT)/P

V = (0.48 mol * 0.08206 L·atm/(mol·K) * 275.15 K) / 0.5 atm

V = 6.24 L

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Blue light has a shorter wavelength, while yellow light has a longer wavelength.

Blue light has a shorter wavelength compared to yellow light. Wavelength is the distance between successive peaks or troughs of a wave, and it is inversely related to frequency and directly related to energy. Since blue light has a shorter wavelength, it also has a higher frequency. Frequency refers to the number of wave cycles that pass through a given point in a second. As the wavelength decreases, the frequency increases.

In terms of energy, blue light has greater energy compared to yellow light. The energy of a photon is directly proportional to its frequency. Since blue light has a higher frequency, it also carries more energy per photon. This higher energy is what gives blue light its characteristic intensity and the ability to penetrate through certain materials more effectively than yellow light.

Understanding the properties of different colors in the visible spectrum, such as wavelength, frequency, and energy, helps us comprehend how light interacts with matter and influences various phenomena in our daily lives.

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Explanation:

The atoms on the periodic table are grouped according to having similar properties. Therefore, atoms of group 15 has 5 valence electrons.

Answer:

The last option is correct.

Mg2+ would be expected to have the greater energy of hydration than Al3+ RMagnesium ion (Mg2+) and aluminum ion (Al3+) are the two ions under consideration.

Both ions have the same charge (+2 and +3, respectively), but Mg2+ is smaller in size than Al3+. Due to its smaller size, Mg2+ has a stronger charge density than Al3+, This means that the water molecules that surround Mg2+ are more closely packed around the ion and interact more closely with it, resulting in a higher energy of hydration. As a result, Mg2+ would be expected to have a greater energy of hydration than Al3Energy of hydration refers to the energy released when an ion is surrounded by water molecules.

The energy of hydration is affected by the size and charge density of the ion. When an ion is surrounded by water molecules, the water molecules form a hydration shell around it, with the positively charged end of the water molecules pointing toward the negatively charged ion. This interaction between the ion and the water molecules results in a release of energy, which is the energy of hydration

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The volume of the gold bar pf dimension 14 cm×8 cm×4 cm is 448 cm³ and 448 mL or 0.448 L.

The volume of a rectangular prism is calculated by multiplying the length, width, and height. In this case, the length is 14 cm, the width is 8 cm, and the height is 4 cm. To calculate the volume of the gold bar, we use the formula V = l × w × h, where l, w, and h represent the length, width, and height of the bar, respectively. Plugging in the given dimensions, we have V = 14 cm × 8 cm × 4 cm = 448 cm³. Since 1 cm³ is equivalent to 1 mL, the volume of the gold bar is also 448 mL.

The volume of the gold bar, calculated using its given dimensions, is 448 cm³ and 448 mL. This volume represents the amount of space occupied by the gold bar.

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Answer:

a pure substance

Explanation:

i hope i help if i didnt im srry:(

There are several amino acids that are usually positive, or protonated, at physiological pH, which is around 7.4. These include histidine, lysine, and arginine.

Histidine has a side chain with a pKa of approximately 6.0, which means that at physiological pH, about half of the histidine molecules will be protonated and carry a positive charge. Lysine and arginine have side chains with even higher pKa values, around 10.8 and 12.5, respectively. As a result, almost all of the lysine and arginine molecules in a physiological environment will be protonated and positively charged. These positively charged amino acids play important roles in protein structure and function, as well as in enzyme catalysis and ion transport across cell membranes.
Amino acids that are usually positive or protonated at physiological pH (around 7.4) are lysine, arginine, and histidine. These amino acids contain basic side chains which can accept protons, making them positively charged under physiological conditions.

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Answer:

A volumetric pipette is used to measure 25.0cm3 of 2.0mol/dm3 aqueous sodium hydroxide into aconical flask.

A burette is filled with dilute sulfuric acid.

Write a balanced symbol equation for the reaction between these chemicals when we neutralise.

Explanation:

The reactants of the given reaction are:

sodium hydroxide and dilute sulfuric acid.

The balanced chemical equation of the reaction is:

\(H_{2}SO_{4} (aq) + 2NaOH(aq) -> Na_{2} SO_{4} (aq)+ 2H_{2} O(l)\)

Acid and base raect with each other and form salt and water.

This reaction is called a neutralization reaction.

In the formation of ammonia from the reaction of hydrogen and nitrogen, hydrogen gains electrons and is reduced.

Reduction is a chemical process in which a substance gains electrons and its oxidation state decreases. This can be contrasted with oxidation, in which a substance loses electrons and its oxidation state increases. In the formation of ammonia from the reaction of hydrogen and nitrogen, hydrogen gains electrons and is reduced, while nitrogen is oxidized. During the reaction, hydrogen atoms donate electrons to nitrogen atoms, forming a covalent bond and producing ammonia. The electrons that are donated by the hydrogen atoms result in an increase in the number of electrons in the hydrogen atoms, which is what makes them reduced. This reaction provides a clear example of how the concepts of reduction and oxidation are related and how they can occur simultaneously in a single chemical reaction.

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The methyl groups in this isomer are placed at the 1,2-positions, giving the nitro group three possible positions: 3, 4, or 5.

We can identify the isomers of xylene (dimethylbenzene) as follows:
Compound A is the para isomer, as it produces just one product upon nitration. In this case, the methyl groups are positioned at the 1,4-positions, which leaves only one possible position for the nitro group.
Compound B is the meta isomer, as it produces a mixture of two products upon nitration. Here, the methyl groups are located at the 1,3-positions, allowing the nitro group to occupy either the 2 or 5 positions.
Compound C is the ortho isomer, as it produces a mixture of three products upon nitration.

Constitutional isomers are types of structural isomers with the same chemical formula but distinct bonding patterns and structures. Counting the number of carbon atoms and the degree is the simple method for determining a constitutional isomer. Stereoisomers are isomers with the same composition but a different orientation in space. It comes in diastereomers and enantiomers varieties. Enantiomers create the non-superimposable mirror images. Although diastereomers cannot be superimposed, they are not mirror images.

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A test tube is heated in a water bath instead of directly over the flame because the water bath provides a more controlled and uniform heating environment, which helps to prevent overheating. Direct heating over the flame can cause uneven heating and may result in cracking or breaking of the test tube.

Test tubes are commonly used in chemistry for conducting various reactions, heating samples, or boiling liquids. When heating a test tube, it is important to ensure that the tube is heated evenly and at a controlled rate to avoid overheating or cracking of the tube.

Heating a test tube directly over a flame can result in uneven heating, as different parts of the test tube may be exposed to different temperatures. Additionally, the intense heat from the flame may cause the test tube to overheat, leading to boiling or cracking of the tube.

A water bath, on the other hand, provides a more controlled heating environment for the test tube. The water in the bath distributes heat more evenly around the tube, allowing for more gradual heating and preventing overheating. The water also helps to maintain a constant temperature, which is important for reactions that require specific temperature ranges.

Furthermore, the water bath also acts as a safety measure, as it provides a barrier between the flame and the test tube, reducing the risk of accidental fires. Overall, heating a test tube in a water bath provides a more controlled and safer heating environment, making it a preferred method for heating test tubes in chemistry.

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Answer:

Number of bacteria in 100 gallons 757082.4×10⁴.

Explanation:

Given data:

Number of bacteria in one drop of water = 2×10⁴

Number of bacteria in 100 gallons = ?

Solution:

It is given that one drop of water is equal to the 1mL.

Now we will calculate the number of milliliters in 100 gallons.

1 gallons = 3785 mL

100× 3785.412 mL = 378541.2 mL

Now we will calculate the number of bacteria in 378541.2 mL or 100 gallons.

378541.2 mL × 2×10⁴ bacteria

757082.4×10⁴ bacteria

A. The electronic configuration for the isotope we want is as follows:

\(1s^2 2s^2 2p^6 3s^2 3p^6\).

B. The element belongs to period 3 and group 18.

C.The last electron's four quantum numbers are:

m_s = +1/2 or -1/2 (since the electron can spin up or spin down)

D. With fluorine, the element will develop an ionic connection.

The positioning of electrons within an atom, molecule, or other physical structure, such as a crystal, is referred to as electronic configuration. It is typically represented by an array of numbers, letters, or superscripts that denote the number of electrons in each atom or molecule's shell or subshell.

Let the first isotope's mass number be x, the second isotope's mass number be y, and the third isotope's mass number be z. Also, let the first isotope's neutron number be a, the second isotope's neutron number be b, and the third isotope's neutron number be c. Using the information provided, we can construct two equations:

126 = x + y + z (equation 1)

a+b+c=60 (equation 2)

Because all three isotopes contain the same amount of protons, we can infer that their electrical configurations are the same. As a result, all that remains is to determine the electrical structure of one of the isotopes.

We can use the fact that the total of the mass numbers is equal to the amount of protons plus the number of neutrons. Let m be the isotope's mass number and z be the number of protons (the atomic number). Then:

m = z + n, where n is the number of neutrons.

The electrical arrangement of an element can also be used to calculate the atomic number. Assume if the isotope we're seeking for is a periodic table element. The element's electrical configuration can be written as:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

The configuration's last electron is in the (n+1)s or (n+1)p orbital. As a result, we may calculate the atomic number by counting the number of electrons in the arrangement. For example, the atomic number for the aforementioned electrical configuration is 18 (2 + 8 + 8).

Let's look for the electrical configuration of the isotope we're after. Because the element's electrical configuration is not specified, we can presume it is a noble gas. As an example, consider argon (Ar), which has the electrical configuration:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

Because argon belongs to period 3 and group 18 (also known as group 8A), the isotope we seek belongs to period 3 and group 18. This is due to the fact that atoms in the same class have the same amount of valence electrons and chemical characteristics.

As a result, the electrical configuration of the isotope we seek is:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

b) The element belongs to period 3 and group 18.

c) The last electron's four quantum numbers are:

Because the electron is in the 3p orbital, n = 3 l = 1.

Because there are three 3p orbitals, m_l = -1, 0, or 1.

m_s = +1/2 or -1/2 (since the electron can spin up or spin down)

d) With fluorine, the element will develop an ionic connection. Because the element belongs to group 18, it has 8 valence electrons, making it a stable noble gas configuration. It may gain one electron to make a 1- ion or lose eight electrons to form an 8+ ion to obtain this state. Fluorine has seven valence electrons and can gain one electron to produce.

Therefore, the electronic configuration for the isotope we want is as follows:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

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Your question is in Spanish, but the English translation of the question is:

The sum of the mass numbers of three isotopes is 126 and the sum of the neutron numbers is 60. Find the electronic configuration of one of the isotopes if its electric charge is

1- b) Determine group and period for said element.

c) Determine the four quantum numbers for the last electron.

d) If the element they found joins with the fluorine element, what type of bond will it form?

To answer this, we need to use the equilibrium constant expression for Kp, which is Kp = (PC)^c/(PA)^a(PB)^b, where a, b, and c are the stoichiometric coefficients of A, B, and C, respectively. In this case, a = b = 1 and c = 2, so the expression becomes Kp = (PC)^2/(PA)(PB).

We can use the given partial pressures of A and B to calculate their product: (PA)(PB) = (0.500 atm)(0.500 atm) = 0.250 atm^2. Then, we can rearrange the equilibrium constant expression to solve for PC: PC = sqrt(Kp(PA)(PB)) = sqrt(340*0.250 atm^2) = 4.60 atm.

Therefore, the equilibrium partial pressure of C is 4.60 atm. It's important to note that this assumes the container is sealed and no gases escape or are added during the reaction.

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