Which statement describes potential energy?
A energy of motion
B.stored energy
C energy due to heat
D. used energy

It is called as chemical reaction when atoms of substances rearrange themselves into a new configuration. so , the correct option is a.chemical reaction.

A chemical reaction occurs when the atoms of a substance rearrange themselves into a different structure. Chemical bonds between atoms can be broken and formed during a chemical reaction to produce new materials with various properties. According to the rule of conservation of mass, the total mass of the reactants remains constant and is equal to the total mass of the products during a chemical reaction. An object's mass is a measurement of the quantity of matter it contains, and an atom is the smallest unit of matter that still has elemental characteristics.

This is an illustration of a chemical reaction:

Methane is burned in the following ways:

CH4 (methane) + 2 O2 (oxygen) CO2 (carbon dioxide) 2 H2O (water).

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A brownfield is a property, the expansion, redevelopment, or reuse of which may be complicated by the presence or potential presence of a hazardous substance, pollutant, or contaminant.

A “brownfield” generally refers to a parcel of land that was previously used for industrial purposes and which is contaminated by low concentrations of hazardous chemicals.

A brownfield development requires more work and investment upfront: existing structures may have to be demolished, materials must be removed, and developers may have to engage in extensive environmental cleanup to remove pollutants.

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Answer:

A gas is most soluble in water under conditions of high pressure, and low temperature.

Answer:

chlorate changes to chlorous acid

Answer:

Formation of sedimentary rocks

Explanation:

I believe this is correct, May I get a brainliest???

Answer:

[Ar] 3d¹⁰ 4s² 4p³

Explanation:

As = [Ar] 3d¹⁰ 4s² 4p³

Answer:

- breaking it down into sections

-learn the element song

-use colors to learn the element groups

Explanation:

what also may help which is time-consuming is writing it out over and over if not I would prefer to learn the song it may seem childish a little but it will help in the long run.

Answer:

I personally have a method for learning stuff like this.

Try going one at a time, and ever once in awhile. Like memorize the first element, then the one next to it [in whichever order you please]

Ex: memorizing 1-10

1.. 1,2.. 1,2,3.. 1,2,3,4..

And then repeat that row until you can recite it almost without hesitation, then move onto another line.

This works for both placement memorization and element name.

Gold is an element that belongs to the periodic table.Elements are the simplest form of substances that can exist, and they cannot be divided into simpler substances by chemical methods. Each element is defined by the number of protons present in the atomic nucleus.

Gold is an element that has 79 protons and is represented by the symbol Au.Gold has several properties that distinguish it from other elements. It is a soft, shiny, dense metal with excellent conductivity. Gold is also a noble metal, meaning it is resistant to corrosion and oxidation and does not react with most acids. Its properties have made it useful for many purposes, including jewelry, currency, and electronics.

Heterogeneous mixtures contain two or more substances that are not uniformly distributed and can be separated by physical means. Solutions are homogeneous mixtures composed of a solute dissolved in a solvent. Compounds are substances composed of two or more elements chemically combined in a fixed ratio. Thus, none of these classifications accurately describes gold.

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Answer:

Atomic radius increases by increasing the atomic number.

Explanation:

Atomic radius :

Atomic radius is the distance between nucleus of an atom to its outer most electronic shell.

Trend along group:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

As the size of atom increases the ionization energy from top to bottom also  decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.

The given data show that the atomic number in increased from 4 to 88 it means atomic radius also increased from 1.53Å to 2.83Å. It means the given data is the elements of periodic table present in group. It is the data of 2nd group of periodic table.

Answer:

he's also gain weight in muscles srry if that doesn't make sense

Explanation:

study island

Answer:

Sand comes from many locations, sources, and environments. Sand forms when rocks break down from weathering and eroding over thousands and even millions of years. Rocks take time to decompose, especially quartz (silica) and feldspar .

Explanation:

The formation of 4-methyl-4-nonanol from the Grignard reaction of methyl iodide and 4-nonone can be explained through the following mechanism:

1. First, magnesium (Mg) metal reacts with methyl iodide (CH3I) to form an organomagnesium compound, commonly known as a Grignard reagent (CH3MgI). This reaction is typically carried out in anhydrous conditions and with the use of a suitable solvent, such as diethyl ether.

2. The Grignard reagent (CH3MgI) then reacts with 4-nonone in a nucleophilic addition reaction. The carbon atom of the carbonyl group in 4-nonone is attacked by the nucleophilic carbon atom of the Grignard reagent. This results in the formation of an alkoxide intermediate.

3. Next, the alkoxide intermediate undergoes a protonation step. This involves the transfer of a proton (H+) from a proton donor, such as water or alcohol, to the oxygen atom of the alkoxide. This protonation step forms the alcohol product, 4-methyl-4-nonanol.

Overall, the mechanism for the formation of 4-methyl-4-nonanol from the Grignard reaction of methyl iodide and 4-nonone involves the formation of a Grignard reagent, its nucleophilic addition to the carbonyl group of 4-nonone, and subsequent protonation to yield the desired alcohol product.

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FALSE. The presence of a plaster ring does not affect the available volume for box fill calculations.

When a plaster ring is installed on a four-inch square junction box, it does not increase the available volume for the purposes of calculating box fill. The volume of the junction box remains the same regardless of the presence of a plaster ring.

The purpose of a plaster ring is to provide a surface for attaching the box to a wall or ceiling and to help protect the electrical wiring and connections within the box. It does not alter the internal volume of the junction box.

The volume of a junction box is important for determining the number and size of wires and devices that can be safely installed within the box while complying with electrical code regulations. The box fill calculation considers the internal dimensions of the junction box itself and does not take into account any external attachments or accessories like plaster rings.

Therefore, the presence of a plaster ring does not affect the available volume for box fill calculations.

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Answer:

0.3 sec : -0.4 m

0.5 sec: -1.2 m

0.7 sec: -2.3 m

Explanation:

0.3 sec: 1/2(-9.3 m/s^2)(0.3 s)^2 = -0.4 m

0.5 sec: 1/2(-9.3 m/s^2)(0.5 s)^2 = -1.2 m

0.7 sec: 1/2(-9.3 m/s^2)(0.7 s)^2 = -2.3 m

Answer:   Acid/base and precipitation reactions almost always are NOT redox reactions. For redox to have happened, the number of electrons that an element has must change (i.e. its oxidation state must change). ... But the hydrogen ion never "has" any electron throughout the process and remains in a +1 oxidation state.

Explanation:

let me know if that helped...(☞ﾟヮﾟ)☞

Acid-base reaction is not a redox reaction, since the oxidation number remains unchanged in acid-base reaction.  

An acid-base reaction is the chemical reaction that occur when acids and bases react together.

Redox reaction is a reaction that involves the transfer of electrons between the atoms, ions, or molecules.

Acid-base reactions involve the transfer of hydrogen ions between reactants. Redox reactions involve a change in oxidation number for one or more reactant elements.

Redox reactions involve a change in oxidation number for one or more reactant elements.

Acid-base reactions involve a transfer of a hydrogen ion instead of an electron and the transfer of an H+ ion leaves the oxidation numbers unaffected.

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Substance that is composed of two or more elements or compounds that are not chemically combined is called mixture.

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Answer:

The change of state that has occurred is from a gas to a liquid

Note: The question is incomplete. The complete question is given blow.

H₂O is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?

from a gas to a liquid

from a liquid to a gas

from a solid to a liquid

from a gas to a plasma

Explanation:

Water can exists in three states: as gaseous water vapor, as liquid water, and as solid ice. Each of these states of water can be interconverted from one to another by the addition or removal of heat in a process known as change of state.

Liquid water can be converted to solid ice by the removal of heat, while solid ice ice can be converted to liquid water by the addition of heat. Also, liquid water can be converted to water vapor by the addition of heat, while water vapor can be converted to liquid water by the removal of heat.

Of the three states of water, the one in which the molecules are farthest apart is in the gaseous state. The molecules have high kinetic energy and move randomly while colliding with one another. When a heat is removed from these highly energetic molecules, the molecules slow down and lose some of their kinetic energy and a change of  occurs from gaseous to liquid state.

Therefore, the change of state that occurred as described, is from gas to liquid.

The final volume of the gas is 40.53 mL.

The changes in temperature, volume, and pressure are determined using either of the following gas laws:

Boyle's law: P1V1 = P2V2

Charles law: V1/T1 = V2/T2

Gay-Lussac's Law: P1/T1 = P2/T2

Ideal Gas Law: PV = nRT,

For question 13:

The temperature is constant so the change in volume is determined using Boyle's Law; P1V1 = P2V2

From the data given:

P1 = 1,

V1 = 608 ml,

P2 = 15,

V2 = ?

Solving for V2:

V2 = P1V1/P2

V2 = 1 x 608/15

V2 = 40.53 mL

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From the calculation, the enthalpy of the reaction is  -56.8 kJ/mol.

We know that the enthalpy has to do with the energy that may have been absorbed or evolved in a reaction. We know that in the case of the reaction that we have, the reaction occurs as follows; \(NaOH(aq) + HCl(aq) ---- > H_{2} O(l) + NaCl\)

The we have the following;

Number of moles acid = 1 M * 100/1000 = 0.1 moles

Number of moles of the base = 1 M * 100/1000 = 0.1 moles

In this case the reacting moles of the acid and the base are equal

Mass of the acid solution = 100 g

Mass of the base solution = 100 g

Total mass of the solution = 200 g

We then have the heat as;

H = mcdT

m = mass of the solution'

c = Heat capacity of the solution

dT = temperature change

Now;

H = 200  * 4.18 * (26.1 - 19.3)

H = 5.68 kJ

Then the enthalpy of the reaction is; -(5.68 kJ)/0.1 moles

= -56.8 kJ/mol

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the acronym PASS involves  the steps needed for the operation of the fire extinguisher which are Pull, Aim, Squeeze, and Sweep.

P- Pull the pin, this step will allow you to discharge the extinguisher.

A- Aim the nozzle at the base of the fire, If aim at the flames, which is most frequently the temptation, the agent in the extinguisher will fly right through and will do no good,  You had to hit the fuel.

S- Squeeze the lever slowly, In this step depresses the button that releases the pressurized extinguishing agent in the extinguisher.

S- Sweep the spray from side to side over the fire,  Start using the extinguisher from a safe distance away, then move forward to the reduced flame, until the fire is completely out, but keep an eye,  on the area it may re-ignites.  

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The given statement  "Consist of alternating layers of marine rocks and non-marine rocks" will be false. Because, the deposition of sedimentary rocks is influenced by various factors such as geological processes, sediment sources, and depositional environments.

The presence of alternating layers of marine and non-marine rocks depends on the specific geological history and depositional conditions of a particular region.

Sedimentary rocks can be formed in marine environments (such as oceans, seas, and estuaries) or non-marine environments (such as lakes, rivers, deserts, and glaciers). The type of sediment and the characteristics of the depositional environment determine the composition of the sedimentary rocks formed.

In some cases, sedimentary sequences may exhibit alternating layers of marine and non-marine rocks. This can occur, for example, in regions where sea levels fluctuated over time, leading to periods of marine deposition followed by periods of non-marine deposition as the shoreline shifted. This pattern can result in the development of transgressive-regressive sequences, which show alternating marine and non-marine layers.

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In this question, we need to find the value of pressure of a 15 grams sample of CO2 gas, and in order to find this value, we will be using the Ideal gas law formula, which is the following:

PV = nRT

Where:

P = pressure in atm

V = volume in liters, 20 Liters

n = number of moles

R = gas constant, 0.082

T = temperature in kelvin, 0°C = 273 K

The number of moles we need to find based on the mass in the question and based on the molar mass of CO2, 44g/mol:

44g = 1 mol

15g = x moles

44x = 15

x = 15/44

x = 0.34 moles of CO2 in 15 grams

Now we have the values to add to the formula:

P * 20 = 0.34 * 0.082 * 273

20P = 7.61

P = 7.61/20

P = 0.38 atm of pressure

The pressure will be 0.38 atm

The value of the coefficient of determination is 0.49.

The coefficient of determination, also known as R-squared (R²), measures the proportion of the total variation in the dependent variable (energy content) that can be explained by the independent variable (protein content). It provides a measure of how well the regression model fits the data.

The coefficient of determination is calculated by squaring the correlation coefficient (r), which represents the strength and direction of the linear relationship between the two variables.

In this case, the given information provides the correlation coefficient (r = 0.7), which indicates a moderate positive correlation between protein content and energy content.

To find the coefficient of determination, we square the correlation coefficient:

R² = r² = (0.7)² = 0.49

Therefore, the value of the coefficient of determination is 0.49.

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The number of the hydrogen atoms that would be required from the diagram is 10.

A Saturated compound has all its carbon atoms connected by single bonds, and each carbon atom is bonded to the maximum number of hydrogen atoms possible. This arrangement allows the compound to have no available or unsaturated bonds for additional atoms.

The compound that is shown must be butane as such the number of the hydrogen atoms that it contains is a total of ten.

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Conclusion call the organized steps taken to answer a scientific problem.

The Scientific Method is defined as a logical and rational order of steps through which scientists come to conclusions related to the world around them. The Scientific Method helps in the organization of thoughts and procedures by which the scientists are in confident in the answers they find.

OBSERVATION is considered as the first step through which they get to know how they want to go about your research.

HYPOTHESIS is the step in which we think hypothetical means about the answer which we have to find.

PREDICTION is our specific belief about our scientific idea:like, If my hypothesis is true, then I predict we will discover this.

EXPERIMENT is defined as the tool that we invent to answer our question.

CONCLUSION is the answer which our experiment gives.

Thus, we concluded that the Conclusion call the organized steps taken to answer a scientific problem.

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Answer:

Ni atoms are contained in 1.25gram is 1.28e22 atoms.

Explanation:

Ni atoms are contained in 1.25gram is 1.28e22 atoms.

We have a Nickel(Ni)  atom . The atomic number of Ni is 28 .It is a silvery-white metal with a slight golden tinge. Ni belongs to the transitional metal series.

The electronic configuration of Ni = Ar4d⁸35²

Nickel is slowly oxidized by air at room temperature.

Nickel is a ferromagnetic element at approximately room temperature.

To answer the problem , we first need to divide by the molar mass of Ni to get the moles of Ni. And then we will multiply by Avogadro's number to find the number of Ni atoms.

Molar mass of Ni = 58.7gm

Given mass of Ni = 1.25gm

Avogadro’s No. = 6.022 × 10²³ atom/mole

                    Moles of Ni = Given mass/Molecular mass

                                          = 1.25/58.7 = 0.0213

                    Moles of Ni = 0.0213

Now ,

       Number of Ni atom = Avogadro’s number × Moles

So that,

                No. of Ni atom = 6.022 × 10²³× 0.0213

                                            = 0.128 ×10²³  atoms

                                           = 1.28 × 10²² atoms

                                           = 1.28e22

So there are 1.28 × 10²² individual Ni atoms are contained in 1.25 grams of Ni.

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The calcium chloride pellets will dissolve faster under option C, where the water cools to a temperature of 33°C.

Calcium chloride (CaCl2) is a hygroscopic compound that readily absorbs moisture from the air. When spread on a wet sidewalk, the calcium chloride can dissolve in the water, forming a solution. It dissolves faster when water cools to a temperature of 33 degree celsius.  This is because the solubility of calcium chloride in water decreases as the temperature increases. So, with a lower temperature, the calcium chloride will dissolve faster. The other options (a, b, and d) do not have a significant effect on the rate of dissolution of the calcium chloride pellets.

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The number of tablespoons of milk needed for 28 pancakes is determined as 12 tablespoons.

option C is the correct answer.

The number of the tablespoons of milk that would be needed is calculated by applying simple proportion method.

3 tablespoons of milk for 7 pancakes;

3 -----------> 7

? tablespoons of milk for 28 pancakes;

? --------------------> 28

Combine the two equations and solve for the number of tablespoons needed as follows;

? = ( 3 x 28 ) / 7

? = 12

Thus, The number of tablespoons of milk needed for 28 pancakes is determined by applying simple proportion.

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Answer:

Explanation:

6CO₂ + 6 H₂O ⇄ C₆H₁₂0₆ + 6O₂

This is the chemical equation given .

1. The equation shows a __Chemical equation_______the breaking and forming of chemical bonds that leads to a change in the composition of matter.

2. In the equation, CO₂ is a___reactant_____.

3. In the equation, C₆H₁₂0₆ is a ___product________.

4. In O₂, the type of bond that holds the two oxygen atoms together is a_nonpolar_covalent bond_________.

5. In H₂O, the type of bond that holds one of the hydrogen atoms to the oxygen atom is a__polar_hydrogen bond____.

6. The number of oxygen atoms on the left side of the equation is__equal to_________ the number of oxygen atoms on the right side.

Answer and Explanation:

When methane (CH4) and chlorine (Cl2) react, a substitution reaction takes place. Specifically, the reaction is a halogenation reaction, in which one or more hydrogen atoms in the methane molecule are replaced by chlorine atoms. The reaction can be represented by the following equation:

CH4 + Cl2 → CH3Cl + HCl

In this equation, CH3Cl represents chloromethane, which is a type of organochlorine compound. The reaction is typically initiated by ultraviolet (UV) light or heat, and it proceeds through a series of free radical chain reactions. The products of the reaction are typically a mixture of chloromethane and hydrogen chloride (HCl) gas.