7th GRADE SCIENCE FIRDT PERSON MARKED BRAINLIEST

A generator is used to convert ________ energy into ______ energy

[Ar] 3d9 4p1 excited state and [Ar]3d104s1 ground state electron configuration for copper

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[Ar]3d104s1 ground state

[Ar] 3d9 4p1 excited state

The shape and energy of an atomic species' electrons may be understood by looking at its electron configuration, which is the accepted nomenclature for describing an atom's electronic structure, whether it be neutral or ionic. We allow each electron to occupy an orbital under the orbital approximation, which can be solved by a single wavefunction. By doing this, we are able to produce the identical three quantum numbers (n, l, and ml) that were produced when Schrodinger's equation for Bohr's hydrogen atom was solved.

The Aufbau Principle, Hund's Rule, and Pauli-Exclusion Principle are three broad guidelines for determining the electron configuration of an atomic species.

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The atom with the smallest atomic radius in Group (i) is Rb (Rubidium), and in Group (ii), it is C (Carbon).

In Group (i), the atom with the smallest atomic radius is Rb (Rubidium).

As you move down a group, the atomic radius generally increases due to the addition of new electron shells.

In Group (ii), the atom with the smallest atomic radius is C (Carbon).

Moving from left to right within a group, the atomic radius tends to decrease due to the increased effective nuclear charge.

This means that the attraction between the electrons and the nucleus is stronger, leading to a smaller atomic radius.

So, Rb has the smallest atomic radius in Group (i), and C has the smallest atomic radius in Group (ii).

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To dissolve one substance, attractions between solute and solvent particles must be formed, steps involved are:

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True, MDMA (ecstasy) is a close chemical relative of methamphetamine.

Both drugs belong to the amphetamine family, which means they share some similarities in their chemical structure. However, MDMA and methamphetamine have different effects on the body and brain. Methamphetamine is a highly addictive stimulant that increases the levels of dopamine in the brain, leading to feelings of euphoria and intense pleasure. MDMA, on the other hand, is a synthetic drug that has both stimulant and hallucinogenic properties. It enhances the release of serotonin and oxytocin, which results in feelings of empathy, love, and bonding with others. Although both drugs can be harmful and have potential side effects, MDMA is less addictive than methamphetamine and is currently being studied for its therapeutic benefits in treating PTSD and anxiety disorders.

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Answer:

\(pH = -log(H3O^+) = -log(8.52E-5) = 4.+\), my guess is about 4.1

Explanation:

hope this helps! :)

Answer:

its 17.0g NH3

Explanation:

find the number of moles of nitrogen.

Take into account these initial-rate measurements for the reaction given by K has a value of 6.6 s-1.

Chemical Response: Chemical reactions are the processes by which a substance or substances change chemically to create a new substance or substances with entirely new attributes. Products are completely distinct in nature and identity from reactants.

A physical response is a reaction that modifies the physical characteristics of an item or material Determinants of physical attributes include things like volume, mass, and density. The definition of a physical reaction is a response in which molecules rearrange one another but do not undergo chemical change.

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Consider these observations of the starting rate for the reaction for which K gives a score of 6.6 s-1.

Chemical Reaction: Chemical reactions are now the mechanisms by which a material or substances undergo chemical modification to produce a new substance or compounds with wholly new properties. Products are wholly different from reactants in nature and identity.

A physical response is a reaction that modifies the physical characteristics of an item or material Determinants of physical attributes include things like volume, mass, and density. A physical reaction is defined as an action in which ions rearrange one another without experiencing a chemical change.

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Answer:

c

Explanation:

QUESTION :WHAT TYPE OF BOND IS CA + AR

ANSWER :

C .

COVALENT.

HOPE IT HELP

THANK ME LATER.

a) The collision frequency of dimethyl ether can be calculated using the kinetic theory of gases. The collision frequency is given by the equation:

\(\[\text{{Collision frequency}} = \frac{1}{4} \sqrt{\frac{8 \cdot k \cdot T}{\pi \cdot m}}\]\)

where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the mass of dimethyl ether molecule. Given that the angle-averaged radius of dimethyl ether is 0.25 nm, we can calculate the mass of the molecule using its density or molar mass.

b) To calculate the decomposition rate constant of (CH3)2CO, we need additional information such as the reaction mechanism and reaction conditions. The rate constant for a chemical reaction depends on factors like temperature, activation energy, and the presence of catalysts. Without these details, it is not possible to calculate the decomposition rate constant accurately.

In conclusion, the collision frequency of dimethyl ether at a specific temperature can be calculated using the kinetic theory of gases. However, to calculate the decomposition rate constant of (CH3)2CO, additional information about the reaction conditions and mechanism is needed.

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The car can go 30 miles on one gallon of gas.

Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.

Vehicles running on compressed natural gas (CNG) operate similarly to those driven by gasoline and equipped with spark-ignited internal combustion engines. The engine operates similarly to a gasoline engine. In a fuel tank, or cylinder, usually at the back of the car, natural gas is kept.

Gallons of gas used by car = 4

distance covered by car = 120 miles

the distance which can be covered by Aubree's car on one gallon of gas =120/4 = 30 miles

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Answer:

1

Explanation:

Potential energy, because it is stored in the basic building block of all living organisms called cells and is only released when necessary for energy consuming work.

The answer is not 1 mol. There are 0.012 mol of acetone in the mixture. Expressed as a decimal, this is 0.012 mol.

To calculate the moles of acetone in the mixture, we need to use the formula:

moles = concentration x volume

First, let's calculate the moles of acetone in the original 2.0 mL of 6.0 M solution:

moles = 6.0 M x 0.0020 L = 0.012 mol

Next, we need to consider the dilution that occurs when the acetone solution is mixed with the HCl solution and water. To do this, we can use the equation:

M1V1 = M2V2

where M1 and V1 are the initial concentration and volume of acetone, and M2 and V2 are the final concentration and volume after dilution.

Solving for M2, we get:

M2 = M1V1/V2

M1 = 6.0 M
V1 = 0.0020 L
V2 = 0.0020 L + 0.0080 L + 0.010 L = 0.020 L

M2 = (6.0 M x 0.0020 L) / 0.020 L = 0.60 M

So the final concentration of acetone in the mixture is 0.60 M. To calculate the moles of acetone in the mixture, we use the same formula as before:

moles = concentration x volume

moles = 0.60 M x 0.020 L = 0.012 mol

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Answer:

C

Explanation:

It starts with one reactant to give and create new compounds as a product. They need a source of energy that can be heat, light, or electricity to break up chemical bonds.

Answer:

The addition of energy in the form of heat or electricity is often required.

Explanation:

A decomposition reaction is a chemical reaction that starts with single reactants to give new compounds as the products. These reaction requires a source of energy that could be light, heat  or electricity to facilitate the breaking-down of the chemical bonds.

Answer:

X: Captive Breeding

Y: Habitat Preservation

Explanation:

Answer:its d

Explanation:

uhhh its d

0.84 milligrams of a 2. 000 mg sample remain after 6. 55 years, according to radioactive decay.

Given data,

\(t\frac{1}{2} of Co-60 = 5.20years\)

amount of sample = 2.000mg initially = 0.002grams

According to radioactive decay,

\(N_{t} = N_{0}e^{-λt}\)

(\(N_{0} - 0.002\) )λ = \(\frac{0.693}{t\frac{1}{2} }\) = \(\frac{0.693}{5.20}\)  = 0.133

According to radioactive decay,

\(N_{t} = N_{0}e^{-λt}\)

\(lnN_{t} = lnN_{0}\) - λt

\(lnN_{t}\) = ln0.002 - (0.133×6.55)

       = -6.21 - 0.87 = -7.08 = 0.00084g = 0.84mg

Therefore, 0.84 milligrams of a 2. 000 mg sample remain after 6. 55 years.

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When a gas expands to four times its initial volume at a constant pressure of 2.10 atm, the work done on the gas is 3,870.68 J. When the gas is compressed to two-thirds its initial volume at the same pressure, the work done on the gas is -467.49 J.

To determine the work done on the gas, we can use the equation:

Work = Pressure × Change in Volume

(a) Given that the gas expands to four times its initial volume while the pressure is constant, the change in volume is:

Change in Volume = 4 × Initial Volume - Initial Volume

Change in Volume = 4 × 6.50 m³ - 6.50 m³

Change in Volume = 25.00 m³ - 6.50 m³

Change in Volume = 18.50 m³

Using the equation for work, and considering that the pressure is constant at 2.10 atm:

Work = Pressure × Change in Volume

Work = 2.10 atm × 18.50 m³

Converting atm to joules using the conversion factor 1 atm = 101.325 J:

Work = 2.10 atm × 18.50 m³ × 101.325 J/atm

Work = 3,870.68 J

Therefore, the work done on the gas when it expands to four times its initial volume is 3,870.68 J.

(b) Similarly, if the gas is compressed to two-thirds its initial volume while the pressure is constant, the change in volume is:

Change in Volume = (2/3) × Initial Volume - Initial Volume

Change in Volume = (2/3) × 6.50 m³ - 6.50 m³

Change in Volume = 4.33 m³ - 6.50 m³

Change in Volume = -2.17 m³

Using the equation for work, and considering that the pressure is constant at 2.10 atm:

Work = Pressure × Change in Volume

Work = 2.10 atm × (-2.17 m³)

Converting atm to joules using the conversion factor 1 atm = 101.325 J:

Work = 2.10 atm × (-2.17 m³) × 101.325 J/atm

Work = -467.49 J

Therefore, the work done on the gas when it is compressed to two-thirds its initial volume is -467.49 J.

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Answer: 0.071 moles of excess reactant \((O_2)\) will be left over.

Explanation:

To calculate the moles, we use the equation:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}\)

a) moles of \(NO\)

\(\text{Number of moles}=\frac{21.6g}{30.01g/mol}=0.720moles\)

b) moles of \(O_2\)

\(\text{Number of moles}=\frac{13.8g}{32g/mol}=0.431moles\)

\(2NO(g)+O_2(g)\rightarrow 2NO_2(g)\)

According to stoichiometry :

2 moles of \(NO\) require 1 mole of \(O_2\)

Thus 0.720 moles of  \(NO\) require=\(\frac{1}{2}\times 0.720=0.360moles\) of \(O_2\)

Thus \(NO\) is the limiting reagent as it limits the formation of product and \(O_2\) is the excess regaent.

moles of \(O_2\) left = (0.431-0.360) = 0.071 moles

Avogadro's law states that equal volumes of gases under the same temperature and pressure contain the same number of particles, which is known as Avogadro's number.

This law is commonly used in the study of gases and is important for understanding the behavior of gases.

Dalton's law of partial pressures states that the total pressure of a gas mixture is equal to the sum of the partial pressures of the individual gases in the mixture.

This law is used to understand the behavior of gases in mixtures, such as air.

Hess's law states that the enthalpy change of a chemical reaction is independent of the pathway taken to achieve the products.

This law is used in the study of thermochemistry and is important for understanding the energy changes associated with chemical reactions.

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Complete question:

Describe about all the laws

O Avogadro O Dalton O Hess O Beer

Hydrazine is a chemical compound with the formula \(N_2H_4\). 120 molecules of\(NH_3\) will be formed if 60 molecules of \(N_2H_4\) decompose into \(N_2\) and \(NH_3\).

It is used as a rocket fuel and as a polymerization catalyst in the production of plastics and when hydrazine decomposes, it produces nitrogen gas (\(N_2\)) and ammonia (\(NH_3\)). If 60 molecules of hydrazine decompose into \(N_2\) and \(NH_3\), the number of molecules of \(NH_3\) that will be formed can be determined using the balanced equation for the reaction: \(N_2H_4 -- > N_2 + 2NH_3\). For every one molecule of hydrazine that decomposes, two molecules of ammonia are formed. Therefore, the number of ammonia molecules produced is twice the number of hydrazine molecules that decompose. Since 60 molecules of hydrazine are decomposing, the number of ammonia molecules formed is: 2 x 60 = 120 molecules of \(NH_3\)

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Answer:

D) Use the appropriate fire extinguisher

Explanation:

stay safe my friend :)

Answer:

D. Volume

Explanation:

Properties mentioned in the question;

colour = gray

Nonmetallic

Density = 3.8 g/mL

Volume = 48.3 mL

Of the mentioned, which is extensive ?

Extensive properties are those properties that are proportional to the amount of substance present.

The correct option is D. Volume. The other properties do not change with increasing or decreasing amount of the mineral

Answer:

P₂ = 2 atm

Explanation:

Given data:

Initial volume = 10.0 L

Initial pressure = 4.0 atm

Final volume = 20.0 L

Final pressure = ?

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

4.0 atm × 10.0 L = P₂ × 20.0 L

P₂ = 40.0  atm. L/ 20.0 L

P₂ = 2 atm

The empirical formula of Lorelai's compound is C₄H₁₀O

Divide by their molar mass

C = 64.8 / 12 = 5.4

H = 13.62 / 1 = 13.62

O = 21.58 / 16 = 1.35

Divide by the smallest

C = 5.4 / 1.35 = 4

H = 13.62 / 1.35 = 10

O = 1.35 / 1.35 = 1

Thus, the empirical formula of the compound is C₄H₁₀O

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One way in which the Bohr model agrees with the Thomson model is in the understanding that atoms consist of positively charged protons and negatively charged electrons. Both models recognize the presence of electrons orbiting around a central nucleus, albeit with different assumptions about the nature of those orbits.

The Thomson model proposed that electrons were dispersed throughout a positively charged sphere, similar to plums embedded in a pudding. On the other hand, the Bohr model introduced the concept of discrete energy levels or orbits for electrons, with each orbit representing a specific energy state.

Despite these differences, both models acknowledge the existence of electrons as negatively charged particles within an atom and their interaction with positively charged particles. They lay the groundwork for understanding the fundamental structure of atoms and the presence of charged subatomic particles.

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Answer:

I don't know 100% but im pretty sure its electrons, if im wrong im really sorry let me know in the comments ill change it

explanation

the nucleus has more weight but its more compact but the electrons are spread apart circling the nucleus and therefor take up more space

Answer:

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