What is the Lewis symbol for germanium? Ge Ge Ge Ge

Answer:

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Explanation:

This is because it tells about the number of moles reacting and producing. Also, it tells the amount of electrons transferred from one compound to another. Balancing/ balanced equation also tells about the energy changes that take place.

The thermal capacity under a certain pressure Since the substance expands and produces energy when heat is applied at a constant pressure, CP is greater than the heat capacity at constant volume CV.

In the first instance, the temperature of the gas must be raised with greater heat. Since it requires more energy to raise the temperature by one unit in the former situation, CP, or specific heat at constant pressure, is greater than CV, or specific heat at constant volume.

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Iodine molecules will be forced to cling together by this force since it is so powerful. The iodine molecule is therefore extremely tough to break. Iodine has a higher boiling point as fluorine as a result.

What exactly is boiling point?

The temperature when a liquid's vapor pressure equals that tension of the gas below it is known as the boils point of the liquid. The degree at which a liquid's vapor pressure equals one atmosphere is called the liquid's typical boiling point (760 torr). The view from a distance. view from a distance of a bubbles in boiling water.

High boiling point: What does that mean?

It measures the point where a chemical boils, to put it simply. A higher the boiling point denotes stronger intermolecular forces, similar to the melting point.

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The electronic configuration of vanadium can be written as, [Ar] 3d³ 4s²

as the neutral atom of vanadium is Argon.

The chemical element vanadium has the symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer somewhat stabilizes the free metal against further oxidation. Electron configuration is the arrangement of electrons in atomic orbitals. It shows the electrons in numbers, It doesn’t show the details on the spin of electrons like the orbital diagram. Electronic configuration of the Vanadium atom in ascending order of orbital energies,

         1s2 2s2 2p6 3s2 3p6 4s2 3d3

The neutral atom of vanadium is Argon. so, the electronic configuration of vanadium can also be written as,

     [Ar] 3d³ 4s²

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The correct order of the given elements above in their increasing atomic radii are as follows:

The atomic radius of an element is one periodic properties of elements which describes the total distance between the center of the nucleus of an element to the outermost shell of an electron.

From the task given above, the atomic radii values of the elements in the problem above are: Phosphorus ( 98pm ), Cobalt ( 152pm ), Ruthenium ( 178pm ), Osmium ( 185pm ) and finally Gallium which is 187pm.

That being said, below are some few examples of periodicities which is seen in elements in the periodic table:

In conclusion, the atomic radius and atomic size are both periodic properties of elements.

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Since glucose does not separate into ions, it will have a single van't hoff factor. Since glucose has the highest freezing point, it will be. Therefore, I $1M $ glucose is the right answer.

What substance has the greatest freezing point?

At 3695 K, tungsten exhibits the highest rate of fusion of any chemical element.

What is the short definition of the Van t Hoff factor?

The ratio of a substance's mass concentration to the percentage of the particles that are produced when it dissolves is known as the Van't Hoff factor. The Van't Hoff factor describes how much a chemical interacts or decomposes in a solution.

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Answer: It's 18.45

Explanation:

If the mixture contains 0.230 mole N₂ and that the partial pressure of CO₂

is 0.250 atm and if the temperature is 273 k, the partial pressure of O₂ should 2.67 atm.

First we have to find the number of mole of CO₂ :

P = 0.25atm

V = 2.5L

T = 273K

So, find number of moles using:

PV = nRT

0.25 atm × 2.5 L = n × 0.08206 atm.L/ K × 273 K

n = 0.0279 mole

Now, the total mole of gas :

P = 4.8 atm

V = 2.5L

T = 273K

find number of moles using :

PV = nRT

4.8 atm × 2.5 L = n × 0.08206 atm.L/ K × 273 K

n = 0.5357 mole

Now, find mole of O₂ :

mole of O₂ = total mole - mole of CO₂ - mole of N₂

mole of O₂ = 0.5357 - 0.0279 - 0.21

Mole of O₂ = 0.2978 mole

finally, find pressure of O₂ :

V = 2.5 L

n = 0.2978 mole

T = 273K

PV = nRT

P × 2.5 L = 0.2978 × 0.08206 atm.L/ K × 273 K

P = 2.67 atm

So, the partial pressure of O₂ is 2.67 atm.

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On rounding of the number 0.02056 to three significant figures we get 0.021.

The significant figures are the digits that are used to represent the accuracy of a particular number or value.

Rounding off is a procedure in which a complex value is made simple by keeping it close to the very next number which is more convenient to deal with.

In the given number 0.02056. We have to round of this number to 3 significant figures.

We can observe that the digit 6 is greater than 5 so we can add one to the successive digit, so the number will become 0.0206.

But it has to be noted that we have to round of the number to three significant figures.

So, again rounding off the number 6. So finally after rounding of two three significant figures are number becomes 0.021.

As we can see that this number contains three digits after the decimal so it has three significant figures.

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Graphite has a higher entropy than diamond, which is again a result of the dense crystal lattice of diamond. In comparison to the graphite structure, it is far more organized.

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Dehydration can have causes that aren't due to underlying disease. Examples include heat, excessive activity, insufficient fluid consumption, excessive sweating, or medication side effects.

What is dehydration of an alcohol?

One route to the synthesis of alkenes is the dehydration of alcohols. This is the process by which alcohols lose water and form double bonds via E1 or E2 mechanisms. Dehydration reactions of alcohols to form alkenes occur by heating alcohols in the presence of strong acids such as sulfuric acid and phosphoric acid at elevated temperatures.

Alcohol is amphoteric. They act as both acids and bases. The lone pair of electrons on the oxygen atom makes the -OH group weakly basic. Oxygen can donate two electrons to an electron-poor proton. Therefore, in the presence of a strong acid, R-OH acts as a base and is protonated to the strongly acidic alkyloxonium ion +OH 2 (protonated tertiary alcohols have pKas as low as -3.8). I can). This fundamental property of alcohols is essential for dehydration reactions with acids to form alkenes.

Therefore, dehydration may be a cause unrelated to the underlying disease. Examples include fever, excessive activity, not drinking enough fluids, excessive sweating, and side effects of medications.

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For chemistry class, I need to familiarise myself with the periodic table of elements; the pronoun in bold is reflexive.

The chemical elements are arranged in columns and rows on a table known as the periodic table, sometimes known as the periodic table of the (chemical) elements. It is widely employed in physics, chemistry, and other sciences and is frequently referred to as an emblem of chemistry. It is a visual representation of the periodic law, which asserts that the atomic number-dependent properties of chemical elements follow an approximate periodic pattern. Four generally rectangular sections, referred to as blocks, make up the table. Periods and groups, respectively, are the names of the table's rows and columns. Similar chemical properties are displayed by elements in the same group on the periodic table. The nonmetallic character (keeping their own electrons), which is on the rise from left to right, is a trend that runs the length of the periodic table.

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blank: a sample created without the absorbing agent utilizing only the solvents and any other compounds present in the sample solutions.

A technique called spectrophotometry uses light intensity measurements as a ray of light travels through a sample solution to determine the amount that a chemical compound absorbs light.

The amount of light absorption by a solution is measured by its absorbance (A), often referred to as optical density (OD).The amount of light that may flow through a solution is called its transmittance.

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Answer:

CH₃C(CH₃)₂CH₂CH₃

Explanation:

2,2-Dimethylbutane has a four-carbon chain with two methyl groups on C-2. The condensed structural formula is CH₃C(CH₃)₂CH₂CH₃. Note that the two CH₃ groups are enclosed in parentheses after the carbon atom to which they are attached.

There are 166,825,440 seconds in 5.29 years.

To calculate how many seconds there are in 5.29 years, we first need to find out how many seconds there are in a year. To do that, we need to multiply the number of days within a year, the number of hours within a day, the number of minutes within a day, and the number of seconds within a minute.

  1 year = 365 x 24 x 60 x 60

             = 31,536,000 seconds

Once we know that, multiply that number of seconds by the number of years in the question, which is 5.29 years.

  = 31,536,000 x 5.29

  = 166,825,440 seconds.

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Explanation:

The chemical formula for the amino acid glycine is;

[tex] \bold{HOOC—CH_2—NH_2} [/tex]

[tex]\bold{ ^ - OOC—CH_2—{NH_3}^{+}}[/tex]

[tex]\bold{ ^ - OOC—CH_2—{NH_3}^{+}}[/tex]

[tex] ^-OOC—CH_2—{NH_3}^{+} + {OH}^{-} \: \rightarrow ^ - OOC—CH_2—{NH_2} \: + H_2O \\[/tex]

Cs has the lowest first-ionization energy.

What is first-ionization energy?

In order to create one mole of gaseous ions with a charge of 1+ from one mole of neutral gaseous atoms, the first ionization energy must be used to remove the most loosely held electron. In terms of symbols, this is simpler to understand. It is the amount of energy required to make this transformation for each mole of X.

What is Ionization energy?

The ionization energy assesses an element's capacity to engage in chemical reactions that require the donation of electrons or the production of ions. It frequently has to do with the kind of chemical bonds that are formed between the constituents of the compounds that they produce. See also electron affinity and binding energy.

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When delta G value for a particular reaction is negative, then we can say that : there are fewer reactant molecules and then product molecules.

A negative ∆G means that reactants have more free energy than the products. Exergonic reactions are also called spontaneous reactions, as they can occur without addition of energy.

When used in a reaction, delta G is the difference in free energy between  products and reactants. If this value is negative, then the reaction is spontaneous and if it is positive, then the reaction is non-spontaneous. If it is zero, then the reaction is at equilibrium.

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FORMAL CHARGE ON S = +1

Electronic Geometry is Tetrahedral

Molecular Geometry is Trigonal Pyramidal

Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the interactions of atoms inside molecules as well as any lone pairs of electrons that may be present. Any molecule with a covalent link, as well as coordination compounds, can have a Lewis structure. Gilbert N. Lewis, who first described it in his 1916 article The Atom and the Molecule, gave the Lewis structure its name. Lewis structures add lines between atoms to represent shared pairs in a chemical bond, extending the idea of the electron dot diagram.

Total number of valance electrons in SF3+

= 6(S) + 3 × 7(F) - 1(charge)

= 26 electrons

FORMAL CHARGE ON S = +1

Electronic Geometry is Tetrahedral

Molecular Geometry is Trigonal Pyramidal

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The density of carbon dioxide gas at 248 K and 98.0 kPa is 2.09g/L.

What is the Combine Gas Law?
Boyle's Law, Charles Law, and Gay-Lussac Law are combined to form the combined gas law. It claims that a constant exists between the ratio of a gas's absolute temperature to the product of its pressure and volume. The ideal gas law is produced when Avogadro's law is paired with the combined gas law. The combined gas law has no recognized discoverer, unlike the named gas laws. When temperature, pressure, and volume are held constant, the combined gas law is just a combination of the other gas laws that operates. There are a few standard equations for expressing the combined gas law. The established law connects Boyle's law with Charles law as follows:

PV/T = k
We know that,
1 kPa = 0.00987 atm
So,
P = 0.00987*98 = 0.967atm
T= 248K

Now, the ideal gas equation
PV=nRT
again, n= m/M
where,
m= Mass, M =Molar mass
and density(d) = m/v
now, PV= mRT/M
therefore, d = PM/RT
Molar mass of CO2= 44g/mol

Therefore, d = 0.967atm * 44 g/mol / 0.82Latm/Kmol * 248 K = 2.09g/L
Therefore, option E is correct.

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A. False (The pH of an alkaline solution is greater than 7.)

B. True

C. True

D. False (Alkalis are usually soapy to touch and have a bitter or metallic taste.)

Corrected versions:

A. The pH of an alkaline solution is greater than 7.

D. Alkalis are usually soapy to touch and have a bitter or metallic taste.

Calculation:

To calculate the density of the essential oil, you would use the following equation:

density = mass/volume

Plugging in the given values, you would get:

density = 40 g/50 ml = 0.8 g/ml

To identify the major and minor resonance we have 7 steps they are:

1. Should write all possible connections for the nitrogen atoms.

N-N-N

2. To, calculate V, the number of valence electrons.

V=3 N +1.------(1)

= 3×5 + 1 = 16

3. For the Calculate P, the number of π electrons that are present in the molecule:

P=6n+2–V-------(2)

where n is the number of non-hydrogen atoms.

substitute values in(2)

we get

P= 6×3 + 2 - 16 = 4 π electrons. So there must be either two double bonds or one triple bond.

4. After, Draw the new structures.

Add all the possible double and triple bonds in the same ways.

5. Next, Add valence electrons to produce each atom an octet.

6. Calculate the formal charge on each atom.

We end up with 3 possibilities.

7. Identify the major contributor.

All three structures have a separation of charge.

The first two structures contain a charge of 2- on one N atom. The third structure has a charge of -1 on two separate N atoms.

The most stable contributor will have the greatest delocalization or spreading out of charge.

So the first two structures are minor contributors, and the third structure is the major contributor.

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The number of subatomic particles present in the isotope O⁻² :

Protons = 8 (Z=8)

Electrons = 10

Neutrons = 8

The number of electrons, protons of neutrons for a particular element in its uncharged state can be found out using its Atomic number( as Z = No. of protons).

For the stability of element the number of electrons and the number of protons present in the atom of an element are equal. While the number of neutrons present in the atom can be found out by subtracting the Atomic number from the atomic mass(as A= no. of neutrons + protons)

To attain the stable valence configuration atoms may loose or attain electrons changing them to a charged ion.

The Atomic no.(Z) of Oxygen is 8, the electronic configuration of Oxygen is

2,6 so Oxygen gains 2 e⁻ to attain the stable valance shell 2,8.

Thus Oxygen a charge of 2⁻.

Then,

The number of protons present in the isotope O⁻² is 8 (Z)

The number of electrons present in the isotope O⁻² is 8 +2 = 10 (Due to the gain of the 2 additional e⁻)

The number of Neutrons present in the isotope O⁻² is A -Z; A= 8

Z=8; A=16;

Thus,

The number of Neutrons present in the io, O⁻² is 16-8Z; = 8

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Answer:

3

Explanation:

there element are approximately together and substitute themselves

The right response is E none of these since () is a .

 :

are typically powerful and hard substances. These metals have high melting and boiling points. The family of includes strong, malleable substances that may be hammered, twisted, and pulled into wires. They are also efficient in carrying heat and electricity. Atoms in these metals are attracted to one another strongly. Usually, they are shiny as well.

is a chemical element with the atomic number 24 and the letter Cr. It is the first component in group 6. It belongs to the transition metal family and is brittle, tough, glossy, and steely-grey in color.

The great corrosion resistance and hardness of metal make it valuable.

The discovery that steel could be rendered extremely resistant to corrosion and discoloration by adding metallic to make stainless steel was a significant advancement in the production of steel.

85% of commercial use is made up of stainless steel with chrome plating (electroplating with chromium).

is highly prized for its ability to be finely polished while remaining tarnish-resistant.

Nearly 70% of the visible spectrum and approximately 90% of infrared light are reflected by polished chromium.

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Time it will it take for the sample to decay to 0.100 mg is 23.39 years.

The time can be calculated by the formula is given as :

T = (t)^n

t = half life = 2.86 years

n = no. of the half time

no. of half lives       sample

1.35                                0.67

0.67                                0.33

0.33                                 0.16

T =        (t)^n

   =    ( 2.86 ) ^ 3

   = 23.39 years  

Thus, plutonium-236 is an alpha emitter with a half-life of 2.86 years. if a sample initially contains 1.35 mg of pu-236,  it take for the sample to decay to 0.100 mg is 23.39 years.

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The bonding molecular orbitals are of lower energy. So, they are first to fill up. The antibonding orbitals are of higher energy than bonding orbitals.

According to molecular orbital theory molecular orbitals of a molecule is formed by combination of its atomic orbitals and electrons present in molecule are distributed among the molecular orbitals.

The total number of electrons present in O2 molecule are 16. Thus, the electronic configuration for combination of two atomic orbitals of oxygen is as follows.

Here sigma and pi orbitals are called bonding molecular orbitals. The sigma star and pi star are called antibonding orbitals.

The electronic configuration is the distribution of a molecule in molecular orbitals. Total number of electrons present in molecule is 16. Thus, 16 electrons are filled in its molecular orbitals.

In orbital, the valence orbitals are 2s and 2p and total number of electrons in these orbitals are 12. Thus, Construct valence molecular orbital diagram and fill 12 electrons as attached.

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the splitting of the uranium atom is called nuclear fission.

Fission occurs when a neutron slams into a larger atom, forcing it to excite and split into two smaller atoms also known as fission products. Additional neutrons are also released that can initiate a chain reaction. When each atom splits, a tremendous amount of energy is released.

Nuclear fission is more dangerous than fusion as it produces harmful weapons-grade radioactive waste in the fuel rods that need to be stored safely away for thousands of years.

Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy. While different, the two processes have an important role in the past, present and future of energy creation.

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The mass of oxygen in grams is 0.704 grams for the could be produced from 2.41 g of ko2 and 4.58 g of co2.

We want to transform the whole lot into moles. The molar masses, in g/mole:

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