Chuck wants to know how many electrons in an atom are not paired up. Which model would be best for Chuck to write
out?
a set of quantum numbers for the last electron in the atom
a configuration with numbers, letters, and superscripts
a dot structure of the atom
an orbital notation of the atom

Answer:

These processes can be categorized using many different subdivisions, but one way that can classify them is their movement with respect to the concentration gradient. Both processes move from a region of high to low concentration.

Unlike in Active Transport where the movement of solutes and other molecules is in the inverse direction from low to high concentration.

Lewis structure of compound with molecular formula

What is Lewis structure?

It defines nature of bond and position of atoms of the molecule which are connected in the molecule.

c2h5n is shown below

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The condensed structural formula for the product of the hydrogenation of 2-butene using a platinum catalyst  CH3 – CH2 – CH2 – CH3

What is hydrogenation of alkene ?

Molecular hydrogen (H2) and another substance or element undergo a chemical reaction known as hydrogenation, typically in the presence of a catalyst such as nickel, palladium, or platinum. The method is frequently used to saturate or decrease organic molecules.

In order to give shortenings a hard firmness and plasticity, hydrogenation is the process of saturating certain double bonds and converting others to trans configuration. This enables the formation of solid and semi-solid fats.

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Answer:

5.5e-13

Explanation:

Divide the mass value by 1e+15

Bonding electrons are involved in the formation of chemical bonds, whereas lone pair electrons are not involved in bond formation and occupy atomic orbitals.

Bonding electrons are electrons that are involved in forming chemical bonds between atoms. In covalent bonds, atoms share electrons to achieve a full outer electron shell and attain stability. The number of bonding electrons is determined by the electron configuration of the atoms involved in the bond and their relative electronegativities.

Lone pair electrons, on the other hand, are non-bonding electrons that are not involved in forming chemical bonds. These electrons are found in the outermost electron shell of an atom and can be thought of as "unpaired" electrons. Lone pair electrons occupy atomic orbitals and do not participate in bond formation. Instead, they have a significant impact on molecular shape and reactivity due to their repulsive forces.

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The silver atom in this scenario acts as an oxidising agent, whereas the copper atom acts as a reducing agent.

The number of electrons that an element's atoms in a compound loss or gain is known as the oxidation number. The symbol (+) and (-) are typically used before the magnitude when writing oxidation numbers. The oxidation number will be zero if the atoms are present in their elemental form. The oxygen (O) oxidation number in compounds is typically -2. the following compound: Let S be in the oxidation state "x." As a result, sulfur's (S) oxidation number is (+6). Any interaction between an oxidising and a reducing agent is referred to as a redox reaction. In the reaction, one species is oxidised while the other species is reduced. The reduced specie suffers a drop in oxidation number while the oxidation number of the oxidised specie grows.

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A.

Reason: cuz i need points noob

The final temperature of the gas that expands from a volume of 22.4 l at 278k to a volume of 38.3 l will be 475 K.

The volume as well as Kelvin temperature will be directly proportional whenever the pressure on even a sample of such a dry gas remains held constant. PV = k would be the law's equation.

Charle's law give the relation between the temperature and volume is shown as:

\(V_{1} / T_{1} = V_{2} / T_{2}\)

where. V is volume and T is temperature.

Given data :

\(V_{1} =22.4 l\\V_{2} = 38.3 l\\T_{1} = 278 K\\T_{2} = ?\)

Put the value of given data in above equation.

22.4 l /   38.3 l = 278k / \(T_{2}\)

\(T_{2}\) = 475 K.

Therefore, the final temperature will be 475 K.

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Uranium-232 will remain 11.72 g

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.  

Usually radioactive elements have an unstable atomic nucleus.  

The main particles are emitted by radioactive elements so that they generally decay are alpha (α), beta (β) and gamma (γ) particles  

General formulas used in decay:  

\(\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{T/t\frac{1}{2} }}}\)

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time

t 1/2 = half-life  = 68.8 years

T = duration of decay  = 344 years

No= initial sample = 375 g

Uranium-232 remain :

\(\tt Nt=375.\dfrac{1}{2}^{344/68.8}\\\\Nt=375.\dfrac{1}{2}^5\\\\Nt=11.72~g\)

Answer:

can you show us question 3 pls

Explanation:

Answer:

B, H, E, G, C, D, A, F

Explanation:

The ones closest to the bottom are the oldest

The option (b) is correct - 3.11 g.

What is concentration?

(KON-sen-TRAY-shun) The quantity of a substance, like salt, that is present in a specific volume of tissue or liquid, like blood, according to scientific definition.

What is mass?

Although grams can be used to measure lower quantities instead of kilograms, which is the standard SI unit for mass (g). Using a balance would be necessary to determine mass.

Gives that

volume of solution = 350 ml

350/1000 l = 0.350l

concentration of na+ ions = 0.125m

concentration of mg2so4 = concentration of na/2

concentration of na2so4= 0.125/2m= molarity

moles of na2so4= m*v

o.125/2*0.350

0.021875 moles

molar mass of g na2so4= 142.04g/mol

mass g m na2so4 = molar mass * mole

142. 04* 0.021875

=3.11g

Therefore, option (b) is correct - 3.11 g.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\ \)

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

\(n = \frac{1.3 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 2.159468...\)

We have the final answer as

Hope this helps you

Answer:

nitrogen and carbon because there diffusion rate is high

Answer:

An atom consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons.

Explanation:

Composition of the Atom. The atom consists of a tiny nucleus surrounded by moving electrons. The nucleus contains protons, which have a positive charge equal in magnitude to the electron's negative charge. The nucleus may also contain neutrons, which have virtually the same mass but no charge. The nucleus has an overall positive charge as it contains protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. There are three subatomic particles: protons, neutrons, and electrons. Two of the subatomic particles have electrical charges: protons have a positive charge while electrons have a negative charge. I hope this helps you :)

Answer: In metallic bonding, valence electrons can move freely between atoms

Explanation:

when metals bond to one another, their outermost energy levels overlap. this allows valence electrons to move freely between atoms in what is sometimes called a “sea of electrons

Answer:

Soil permeability

Explanation:

Soil permeability is the ease with which gases, liquids or plant roots can penetrate or pas through the soil.

It is an important factor when considering soil property for agricultural purposes.

Answer:

Soil permeability

Explanation:

The temperature at which a liquid's vapour pressure equals the pressure around it and the liquid transforms into a vapour is known as the boiling point of a substance. A liquid's boiling point varies depending on the atmospheric pressure in the area.

A liquid partially vaporises into the space above it at any temperature up until the vapour pressure of the liquid at that temperature, which is a characteristic value. When a liquid reaches its boiling point, vapour bubbles form inside the liquid and rise to the surface as the temperature rises, increasing the vapour pressure.

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Takes 30 mins for the egg to reach room temperature

Answer:

A

Explanation:

Carbon dioxide in the air

Answer:

c

Explanation:

it is acidic due to carbon dioxide dissolving into it and forming a weak carbonic acid.

Answer:

See below

Explanation:

Specific heat is  'c'

Q = m c  T      where T i s change in temp

675  = 55 c (118-25)

c = .13196      kJ / kg-C       ...I do not know what units you want....

                              this is also .13196 J/gm-C      

when the temperature of an isolated system decreases while the surroundings of a non-isolated system gains heat.

The statement it is observed that when dull, grey magnesium is placed in acid, bubbles stream from the metal and the temperature rises is true.

Magnesium metal, which is drab and grey, reacts chemically with acid to produce hydrogen gas and magnesium ions in solution. Exothermic means that heat is emitted, which raises the temperature as a result of the reaction. The hydrogen gas that is being created as a result of the reaction is what is visible as bubbles.

A chemical reaction happens when magnesium (Mg) metal is dissolved in an acidic liquid like hydrochloric acid (HCl). The hydrogen ions (H+) from the acid react with the magnesium atoms on the metal's surface to create magnesium ions (Mg2+) and hydrogen gas (H2). In this particular single replacement or displacement process, magnesium replaces the acid's hydrogen:

MgCl2(aq) + H2(g) = Mg(s) + 2HCl(aq)

The fact that heat is emitted as a byproduct of this process indicates that it is exothermic. The temperature of the solution may rise as a result of the heat produced during the reaction. Because hydrogen gas is created during the reaction, which is less dense than the liquid and rises to the surface, bubbles are visible during the process.

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Answer:

The easiest way to determine if a 1943 cent is made of steel, and not copper, is to use a magnet. If it sticks to the magnet, it is not copper. If it does not stick, the coin might be of copper and should be authenticated by an expert

Explanation:

Answer:

non of the above lol , 3.77 moles of Fe contain 2.27x1024 atoms fe

The number of iron atoms (Fe) are present in 3.0 mol of iron metal (Fe) is 18×10²³atoms.

Avogadro's number is the number of entities which present in one mole of that substance and it is represented as:

1 mole = 6.022×10²³ atoms

In 3 mole of Iron, number of atoms will be calculated as:
3 mole Fe = 3mol × 6.022×10²³atoms/mol = 18×10²³atoms

Hence 18×10²³atoms of iron are present.

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Answer: no free electrons

Explanation: Diamond is very hard due to the strong covalent bonds and rigid tetrahedral 3d arrangement. It does not conduct electricity, as there are no electrons free to move and carry charge through the structure.

The number of valence electrons in each of the atoms are;

B - 3

Al - 3

Cl - 7

Ne - 8

We define an atom as the smallest part of a substance that can take part in a chemical reaction. We know that when we begin to break down the elements that the atoms can be found in the element and there are sub atomic particles that can also be found inside the atom of the element.

The electrons that are found at the last shell or the outermost shell of the atom are the ones that we call the valence electrons that can be found in the atom.

The electronic configuration of boron is \(1s^2 2s^2 2p^1\) (the n =2 level is the valence shell)

The electronic configuration of Al is \(1s^2 2s^2 2p^6 3s^2 3p^1\)( the n= 3level is the valence shell)

The electron configuration of Cl is \(1s^2 2s^2 sp^6 3s^23p^5\) ( the n= 3level is the valence shell)

The electron configuration of Ne is \(1s^2 2s^2 2p^6\) (the n =2 level is the valence shell)

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Hello there! :)

\(\huge\boxed{\text{11.315 mol}}\)

We can use dimensional analysis to convert from grams to moles. Use the atomic weight of argon to determine the amount of g/mol.

\(452g * \frac{1 mol}{39.948g} = \frac{452}{39.948}mol = 11.315mol\)

Therefore, there are approximately 11.315 moles in 452 grams of argon.

The number of moles that are contained in the given mass of argon is equal to 11.32 moles.

Given the following data:

Mass of argon = 452 grams.

Scientific data:

Molar mass of argon = 39.948 g/mol.

In this exercise, you're required to determine the number of moles of argon that are contained in the given sample.

Mathematically, the number of moles contained in a given mass of chemical compound is calculated by this formula:

\(Number \;of \;moles = \frac{mass}{molar\;mass}\)

Substituting the given parameters into the formula, we have;

Number of moles = 452/39.948

Number of moles = 11.32 moles.

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