What is the average atomic mass of the isotopes shown in the table?

Answer:

true I think ?38363849472

Answer:

true

Explanation:

Answer:

Pb[lead] [Xe]4f^145d^106s^26p^2

U[uranium] 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4e^14 5d^10 6p^6

7s^2 5f^4

This notation can be written in core notation or noble gas notation by replacing the

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4e^14 5d^10 6p^6

7s^2 5f^4

with the noble gas [Rn].

[Rn]7s25f4

N[nitrogen] The full electron configuration for nitrogen is 1s^2 2s^2 2p^3.

Ti[titanium] Ti2+:[Ar]3d^2

Ti:1s^2 2s^2 2p^6 3s^2 3p^6 3d^2 4s^2

1s^2 2s^2 2p^6 3s^2 3p^5 = 17 electrons

(1) electron gain will result to a

negative charge (−), and

(2) electron loss will result to a positive charge (+),

1s^2 2s^2 2p^6 3s^2 3p^6 = 18 electrons

Hg[mercury] You should then find its atomic number is 80. It has a Xe core, so in shorthand notation, you can include [Xe]instead of

1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6,

for 54 electrons. For the 6th row of the periodic table, we introduce the 4f orbitals, and proceed to atoms having occupied 5d orbitals. We, as usual, have the ns orbitals, and n=? for the 6th period?

Mercury has a regular electron configuration. It becomes:

[Xe]4f145d106s2

Explanation:

socratic.org helped me! I'm really sorry if this is wrong!

To convert the salts of organic acids back into their original form you have to alter the pH of solution.

pH is a numerical indicator of how acidic or basic aqueous or other liquid solutions . The phrase, which is frequently used in chemistry, biology, and agronomy, converts the hydrogen ion concentration, which typically ranges between 1 and 1014 gram-equivalents per liter, into numbers between 0 and 14.

pH is an important quantity that reflects the chemical conditions of a solution. The pH can control the availability of nutrients, biological functions, microbial activity, and the behavior of chemicals.

You may do this by including a mineral base, such sodium hydroxide. The proton will be eliminated by the mineral base, leaving the original organic molecule. The organic component has lost its charge and is no longer as soluble in water.

Thus, to convert the salts of organic acids back into their original form you have to alter the pH of solution.

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Answer: It’s C for me: To synthesis new DNA

Explanation:

Brainly please

Answer:

The equilibrium constant for the reversible reaction N2(g) + 3H2(g) <---> 2NH3 at 400 degrees Celsius is given by K = [NH3]2/[N2][H2]3 = (0.0357)2/(0.0420)(0.516)3 = 0.000457.

Both enolates may be formed but the thermodynamic enolate is the more predominant form.

Pentan-2-one has two possible enolate ions that can be formed, depending on which carbon is deprotonated.

The two possible enolate ions are the kinetic enolate and the thermodynamic enolate.

The kinetic enolate is formed faster and is less stable than the thermodynamic enolate, which is formed more slowly but is more stable.

Therefore, both enolates may be formed but the thermodynamic enolate is the more predominant form.

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Answer:

Explanation

Symbiotic

The following statements best describes a cost of uranium mining:

The people living near the mines might suffer from diseases due to radiation.

Uranium has the symbol U and the atomic number 92. It is a silvery-grey metal in the periodic table's actinide series. A uranium atom contains 92 protons and 92 electrons, with 6 valence electrons.

Uranium is radioactive because all of its isotopes are unstable; the half-lives of its naturally occurring isotopes range from 159,200 years to 4.5 billion years. The most common natural uranium isotopes are uranium-238 and uranium-235 (which has 143 neutrons).

Uranium has the highest atomic weight of any element found in the primordial universe. It has a density that is roughly 70% higher than lead and slightly lower than gold or tungsten.

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The right answer is (D), meaning that there hasn't been a discernible rise in air pollution around the mine.

Heavy metal uranium has been used as a copious source of focused energy for more than 60 years. In the upper mantle, uranium is as common as iron, tungsten, as ruby, and most rocks contain it in concentrations of 2 to 4 percent per million. Radon is a gas that may be recovered from water and is present in oceans.

Nuclear power plants can be fueled with uranium that has been "enriched" to include more U-235 in addition to nuclear reactor to power ships and submarines. It may be applied to nuclear warheads as well.

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The complete question is-

Uranium can supply energy for the world's electricity without increasing greenhouse gases. Which of these statements best describes a benefit of uranium mining?

A: Fewer people are displaced by a uranium mine than other types of mines.

B: The rivers and streams around the mine are contaminated by runoff.

C: The regions near the mines get less electricity from uranium mining.

D: There is no measurable increase of air pollution near the mine.

The study of variation and inheritance is called genetics.  "Inheritance being defined as a technique through which the qualities and attributes are passed

The term 'Inheritance' comes a contraction of the word "Inherit" that means, "to inherit any trait, attributes or traits from family". Therefore, "Inheritance being defined as a technique through which the qualities and attributes of the super class or even other derived classes are passed down to the sub or child class.

It also has the ability to take characteristics first from child class and use them in other derived classes." The study of variation and inheritance is called genetics.

Therefore, the study of variation and inheritance is called genetics.

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liquid water For example, the limited temperature range of liquid water (0°C–100°C) severely limits its use. Aqueous solutions have both a lower freezing point and a higher boiling point than pure water.

How hot (or energetic) a substance or radiation is can be quantified by a physical value called temperature.

There are three different types of temperature scales: those like the SI scale that are defined in terms of the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron in a body; those that only rely on strictly macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are defined by actual empirical properties of particulates rather than by theoretical principles.

Temperature is gauged using a thermometer. It is calibrated using a variety of temperature scales that historically defined themselves using various reference points and thermometric materials. The most widely used scale is the Celsius scale, previously called as "centigrade."

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Secondary amine is what it is. Option (B3-dimethylbutan-2-amine )'s is the primary organic product created during the following reaction. Thus, if more hydrogen is added to carbon, we will obtain the main product, according to the Markovnikov Rule.

As a result, the main product produced by adding hydrogen to carbon-1, which has a higher concentration of hydrogen, and adding bromine to carbon-2 is 2-bromopropane. When a reaction follows Markovnikov's rule, a chemical or product is said to be a major organic product. The tertiary alkyl iodide is the largest byproduct of the second process, which transforms alcohol into alkyl iodide, while the secondary alkyl iodide is the minor byproduct.

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Electrons tend to occupy the lowest available energy level.

This is in accordance with the Aufbau principle, which states that electrons fill orbitals in order of increasing energy levels. Electrons prefer to occupy lower energy orbitals because they are more stable, and therefore, require less energy to maintain their current state. The electron configuration of an atom describes the arrangement of its electrons in various orbitals.

The energy levels of electrons in atoms are described using the principal quantum number (n). The first energy level (n = 1) is the lowest energy level, and it is closest to the nucleus. As the value of n increases, so does the energy level of the electron, and the distance from the nucleus increases as well. In summary, electrons tend to occupy the lowest available energy level because they are more stable and require less energy.

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Answer:

This deficiency of iodine in the diet can be addressed by fortification of salt i.e. adding iodine to salt. Salt has been identified as an effective vehicle for iodine because it is consumed almost daily and universall

Explanation:

hope you understand

14 carbon atoms do the 14CO2 used to synthesize malonyl-COA from acetyl-CoA appear in palmitate.

Acetyl-CoA is carboxylated into malonyl-CoA by the acetyl-CoA carboxylase enzyme. The joining of one acetyl-CoA molecule and one bicarbonate molecule requires energy from ATP.

Malonyl coenzyme A: acyl carrier protein transacylase is an enzyme that uses malonyl-CoA in the production of fatty acids (MCAT).

The highly controlled acetyl-CoA carboxylase (ACC) in the cytoplasm produces malonyl-CoA by carboxylation acetyl-CoA in biotin and ATP-dependent manner. Acetyl-CoA carboxylase is an enzyme that changes acetyl-CoA into malonyl-CoA. Malonyl-ACP is created when the malonyl group is added to an acyl carrier protein.

A condensation reaction between malonyl-ACP and acetyl-CoA results in acyl-ACP and the simultaneous release of CO2.

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Answer:

See below!

Explanation:

For the chemical formula, you need to have enough of each atom so that the charge is zero.

Aluminum has a +3 charge, and fluorine has a -1 charge.  Since the charge has to be zero, you need three fluorines, giving you AlF₃.

Barium has a +2 charge, and oxygen has a -2 charge.  Since the charges are equal in magnitude but opposite in sign, you only need one of each atom giving you BaO.

The name of the ionic compound will be the metal and then the nonmetal.  When putting the nonmetal in, change the ending to "-ide".  For example "chlorine" would be "chloride.

CaCl₂  ==>  calcium chloride

Ga₂S₃  ==>  gallium sulfide

K₃N  ==>  potassium nitride

AlF₃ ==>  aluminum fluoride

BaO  ==>  barium oxide

2.50 litres of a 10.0 M solution require the preparation of 25.0 moles of ethylene glycol.

Excellent antifreeze, anti-boil, and anti-corrosive qualities are produced when antifreeze and water are mixed in a 50/50 ratio. The proportion of conventional ethylene glycol to water in severely cold conditions can reach 70% antifreeze, 30% water. The maximum antifreeze to water ratio when using DEX-COOL® is 60/40.

moles = concentration (M) x volume (L)

Given that the desired concentration is 10.0 M and the volume needed is 2.50 L, the setup for calculating the total number of moles of ethylene glycol can be written as:

moles = 10.0 M x 2.50 L

moles = 25.0 mol

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Answer:

Understanding the interior structure of the Earth can be a challenging

skill for many concrete learners to master, due to the inability to experience these

structures first hand and typically seeing them through images or diagrams. Handson learners can better learn about the basic structures of the Earth interior by

building models of these structures that they can see, touch, and interact with along

with exposure to familiar objects (such as fruit) that can be used to

represent/model the interior of our planet.

Procedure: Introduce a globe to students

Explanation:

Answer:

A boiled egg is an object that represents Earth accurately. A boiled egg and the Earth both have a brittle shell. The crust of the earth is broken into pieces, like the cracked shell of a hardboiled egg. The mantle of the earth is like the egg white, and the core of the earth lies in the center, like the egg yolk.

Explanation:

This is the correct answer I got a 100 on it. The other person's answer wasn't complete and didn't remember what they were comparing.

I hope my answer helps you!!!

Please mark my answer the Brainiest!!!

The answer is (D) 3.20L; the gas will occupy a volume of 3.20 L at 45.0°C and 1.00 atm.

The combined gas law is a gas law that combines Boyle's law, Charles's law, and Gay-Lussac's law. It relates the pressure, volume, and temperature of a fixed amount of gas. The law states that the product of the pressure and volume of a gas is directly proportional to the product of its temperature and the number of moles of gas present.

To solve this problem, we can use the combined gas law,

(P1V1)/T1 = (P2V2)/T2

Where:

P1 = initial pressure

V1 = initial volume

T1 = initial temperature

P2 = final pressure (which is the same as the initial pressure in this case)

V2 = final volume (what we're trying to find)

T2 = final temperature

Plugging in the given values, we get:

(1.00 atm x 3.00 L) / (298.15 K) = (1.00 atm x V2) / (318.15 K)

Solving for V2, we get:

V2 = (1.00 atm x 3.00 L x 318.15 K) / (298.15 K x 1.00 atm)

V2 = 3.20 L

Therefore, the gas will occupy a volume of 3.20 L at 45.0°C and 1.00 atm.

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Potassium is one of the most reactive metals due to its valence electron making it to be highly powerful.

Potassium is a very reactive metal because it is very active in chemical reactions. When potassium reacts with other elements, it forms potassium compounds that are very stable. This makes potassium a very good choice for many industrial and commercial applications.

The valence shell of Potassium has only one electron. Once it gives up that one electron, it has completed its outer energy level, so it wants to gain an electron to complete its level.

This makes it a powerful reducing agent, meaning it can oxidize other metals. It also makes it so that it is not found as a free element. Potassium is found in the first column of Group 1 on the periodic table, which means it has a valence of 1.

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Answer: 19.8 seconds

Explanation:

you're welcome:) <3 plz lmk if i'm wrong

Answer:

a graduated cylinder

Explanation:

the graduated cylinder is the lab tool used to measure the volume of any liquid <3

Remove the sample from the sample chamber, turn off the light bulb and clean up around the spectrophotometer.

There are methods for determining the concentration of a sample. Here are our options. UV Photomedium The correct answer for the UV spectrum is all I need? This allows me to determine the concentration in the UV spectrum photometer. Absorption of visible light by compounds creates distinct spectra. Different spectrum is what it means. you can see what it looks like. Interaction bits are between light and matter. If a sample is given here and absorbs light, allowing an absorber to absorb it, a different spectrum will be seen.

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Answer:

A solid's particles fit closely together. The forces between the particles are so strong that the particles can not move freely; they can only vibrate. This causes a solid to be a stable, non-compressible shape with a definite volume.

Explanation:

I honestly don't know if that's right...

Answer:

AlCl3

Explanation:

reaction between aluminium and chlorine will give aluminium chloride

Answer:

A There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products.

Explanation:

Matter is conserved in a chemical equation if there are no loss of atoms. That means, total number of atoms of elements must be the same as the total number of element on the product side. The correct option is;

A. There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products.

Answer:

its A. i just did dat

1) l=n-1

l=1

ml=-1,0,1(3values)

2a) n=2 l=1 ml=-1,0,1

number of orbitals in sublevels = 3

b) n=3 l=2 ml = -2,-1,0,1,2 number of orbitals in sublevels = 5

c)n=5 l=4 ml= -4,-3,-2,-1,0,1,2,3,4 number of orbitals in sublevels =9

An electron in a certain atom is in the n = 2 quantum level.  The possible values of l and ml that it can have are l=1 and ml=-1,0,1.

The building block of an element is an atom. An atom is a kind of stuff that cannot be further decomposed chemically. The three main components of an atom are protons, neutrons, plus electrons.

Some substances are either bigger or smaller than atoms. Examples of chemical species which are not commonly regarded as atoms include protons, neutrons, and electrons, which are atom-related particles.

Atoms make up molecules and compounds, however they are not actual atoms. The molecules and compounds salt, water, and methanol are examples of. Ions are the name for electrically charged atoms.

l=n-1

l=1

ml=-1,0,1(3values)

Therefore, the possible values of l and ml that it can have are l=1 and ml=-1,0,1.

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Answer:

1. B

2. C

3. A

4. C

5. A

6. B

Explanation:

1. Mary discovered that the cell membrane of a bacteria acts like a fence because it keeps some things in and other things out: this is an analogy because there's a comparison between the cell of a bacteria and a fence.

2. Mary walked into her room where her little son was playing, found a broken window, and thought immediately that her son had broken it: this is an inference because she immediately thought her son broke it.

3. Mary noticed that her counter top was warm to the touch: this is an observation which was based on an evidence of touch.

4. Mary noticed that the side walk was wet and thought that it may have been that the sprinklers had been on recently: this is an inference because it was based on her thoughts.

5. Mary counted and recorded 20 heart beats in 10 seconds: this is an observation because she actually counted her heart beats.

6. The lecturer compared the human eye to a camera lens: this is an analogy because it was a comparison between a human eye and a camera lens.

Equations showing how weak bases ionize water and corresponding expressions for base dissociation constants are:

NH3 + H2O ⇌ NH4+ + OH-,

Kb = [NH4+][OH-]/[NH3]; CH3NH2 + H2O ⇌ CH3NH3+ + OH-,

Kb = [CH3NH3+][OH-]/[CH3NH2]; C6H5NH2 + H2O ⇌ C6H5NH3+ + OH-, Kb = [C6H5NH3+][OH-]/[C6H5NH2].

Here are the equations and expressions for the ionization of weak bases in water:

Ammonia (NH3):

NH3 + H2O ⇌ NH4+ + OH-

Kb = [NH4+][OH-]/[NH3]

Methylamine (CH3NH2):

CH3NH2 + H2O ⇌ CH3NH3+ + OH-

Kb = [CH3NH3+][OH-]/[CH3NH2]

Aniline (C6H5NH2):

C6H5NH2 + H2O ⇌ C6H5NH3+ + OH-

Kb = [C6H5NH3+][OH-]/[C6H5NH2]

In each of these equations, the weak base reacts with water to form its conjugate acid (which gains a proton) and hydroxide ions. The equilibrium constant for this reaction is called the base dissociation constant, Kb.

The Kb expression is the product of the concentrations of the conjugate acid and hydroxide ions, divided by the concentration of the weak base.

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