Check all the following combinations of elements that would not form a covalent bond.



1. C and H


2. N and CI


3. S and CI


4. Na and O


5. Cu and O

When a thermal energy is applied to a container of gas the volume of the gas will increase

Heating a gas makes its atoms and molecules move faster and that way increases the kinetic energy of the particles causing the gas expansion and the increase of its volume and pressure.

Otherwise when the thermal energy is removed, the atoms or molecules start to move slower and become denser until the substance condenses.

Common examples of  kinetic energy due to thermal energy are: rubbing the hands, baking in an oven, boiling water, when the seat of the car are heated.

It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).

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Answer:

False

Explanation:

if this were true then water would not be available on earth other than in the atmosphere because of evaporation

Answer:

2n²

Explanation:

Principal quantum number shows the energy of an electron. It is represented by letter n.

The formula that is used to find the maximum number of electrons that can occupy a principal energy level is given by :

M = 2n²

Where n is principal quantum number associated with that energy level.

Hence, the correct option is (a).

The element that probably forms a compound with oxygen that has a chemical formula most similar to the compound formed by oxygen and sodium is potassium. Potassium is in the same group as sodium on the periodic table and has similar chemical properties.

On the other hand, the element that forms a compound with oxygen that has a chemical formula least similar to the compound formed by oxygen and sodium is helium. Helium is a noble gas and does not readily form compounds with other elements, including oxygen.

In summary, potassium is the element that forms a compound with oxygen most similar to the compound formed by oxygen and sodium, while helium is the element that forms a compound with oxygen least similar to the compound formed by oxygen and sodium.

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The final temperature of the water is 33.02°C.

Here's the solution:

Initial temperature of water (T1) = 30°C

Mass of water (m) = 2300g

Specific heat capacity of water (c) = 4.184 J/g°C

Heat released by the reaction (q) = 9.66 * 10^3 J

Final temperature of water (T2) = (T1 + q/mc)

= (30°C + 9.66 * 10^3 J / 2300g * 4.184 J/g°C)

= 33.02°C

The heat released by the reaction is absorbed by the water, causing the temperature of the water to increase.

The final temperature of the water is calculated by adding the heat released by the reaction to the initial temperature of the water and dividing by the mass of the water and the specific heat capacity of water.

Thus, the final temperature of the water is 33.02°C.

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Answer:

An object's thermal energy is dependent upon its temperature and mass. The higher the temperature of a given quantity of a substance, more is its thermal energy. Similarly, for the same temperature, higher mass of a substance will contain more thermal energy

Answer:

The answer is Silver

Numbers of Protons in Silver: The element Silver (Symbol Ag) has the Atomic Number of 47. Any atom that contains exactly 47 protons in its nucleus is an atom of silver.

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pop by nayeon is the answer fs

The number of electrons transferred if the total charge passing through a circuit is 0.024 coulombs is approximately 1.5 x 10²⁰ electrons.

To calculate the number of electrons transferred, we need to use the elementary charge (e) as a conversion factor. The elementary charge is the charge carried by a single electron, which is approximately 1.602 x 10⁻¹⁹ coulombs.

We can calculate the number of electrons by dividing the total charge (Q) by the elementary charge (e): Number of electrons = Total charge / Elementary charge

Substituting the given values: Number of electrons = 0.024 C / (1.602 x 10⁻¹⁹ C)

Calculating this expression, we find: Number of electrons ≈ 1.5 x 10²⁰electrons

Therefore, approximately 1.5 x 10²⁰ electrons would be transferred if the total charge passing through the circuit is 0.024 coulombs.

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Explanation:

We have to find the net charge of a polyatomic ion that contains 49 protons and 50 electrons.

n° of protons = 49 n° of electrons = 50

The charge of each electron is -1 and the charge of each proton is +1.

charge of electron = -1 charge of proton = +1

Finally the net charge will be:

Net charge = n° of electrons * charge of electron + n° of protons * charge of proton

Net charge = 50 * (-1) + 49 * (+1)

Net charge = -1

Answer: C) -1

Explanation:

For one thing, Net volume = Final volume - Initial volume

The result of this calculation follows the rule of subtraction.

(For addition and subtraction problems, the answer should be rounded to the same number of decimal places as the measurement with the least number of decimal places.)

So, in case in point is:

Trial 2

Initial = 1.2 mL

Final = 2.45 mL

Net = 2.45 - 1.2 = 1.25 = 1.3 (follow the rule from above)

Please, take a look and apply the rule mentioned.

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The average volume per drop is well done (3 significant figures)

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Answer: If a dark section of pavement absorbs more of the sun's energy than it reflects, then that section will feel warmer over the course of a sunny day.

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

The food pyramid is just to make people have a healthier "Diet."

Explanation:

It shows the food groups we eat and which ones to put together to make a healthy diet. Eating the right amount of each food group is called a "Balance" diet. Therefore, its not needed, but it is useful.

The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration

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Answer:

Explanation:

The ideal gas law states that the pressure, volume, and temperature of a gas are directly proportional to one another, as expressed by the equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin.

a. The pressure of a gas is proportional to its temperature, as described by the equation P = kT, where k is a constant.

b. The volume of a gas is inversely proportional to its pressure, as      described by the equation V = nRT/P.

c. The temperature of a gas is directly proportional to its volume, as described by the equation T = PV/nR.

d. The pressure and volume of a gas are inversely proportional to one another, as described by the equation P = nRT/V.

e. The temperature and volume of a gas are directly proportional to one another, as described by the equation T = P/nR.

Answer:

1.1428

Explanation:

Solubility=1000xmass of Solute/Volumexmolar mass

Mass=14g

Molar mass of KCI03=122.5

Volume of the Solution=100cm3

Solubility=1000×14/100×122.5

Solubility=1.1428

Answer:

Explanation:

The main difference between these two processes is that fission is the splitting of an atom into two or more smaller ones while fusion is the fusing of two or more smaller atoms into a larger one.

Fission means splitting 1 atom into more atom

Fusion means Combination of 2 atom or more atom.

Answer:

Heat energy is the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases. Heat energy can be transferred from one object to another. the transfer or flow from one object to another is called heat.

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The molecular weight of 8-anilino-1-naphthalenesulfonic acid is approximately 267.32 g/mol.

The molecular weight of 8-anilino-1-naphthalenesulfonic acid can be calculated by summing up the atomic weights of its constituent elements. Here is the breakdown of the molecular formula: C₁₆H₁₃NO₃S

Atomic weights:

C (carbon) = 12.01 g/mol

H (hydrogen) = 1.01 g/mol

N (nitrogen) = 14.01 g/mol

O (oxygen) = 16.00 g/mol

S (sulfur) = 32.07 g/mol

Calculating the molecular weight:

(16 × 12.01) + (13 × 1.01) + (1 × 14.01) + (3 × 16.00) + (1 × 32.07) = 267.32 g/mol

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Answer:

G

Explanation:

Such as:

CO2 + H2O > C6H12O6 + O2 (photosynthesis)

The most important types of interparticle forces present in each of the following substances (in solid form) are as follows: Ar (argon): The interparticle forces present in argon are London dispersion forces. These forces arise due to temporary fluctuations in electron distribution, resulting in the creation of temporary dipoles.

2. HCl (hydrogen chloride): The interparticle forces present in HCl are dipole-dipole interactions. HCl is a polar molecule with a positive hydrogen end and a negative chlorine end. The positive end of one molecule attracts the negative end of another molecule, leading to dipole-dipole interactions. 3. BaSO4 (barium sulfate): The interparticle forces present in BaSO4 are ionic bonds. Barium sulfate consists of Ba2+ cations and SO42- anions held together by electrostatic attractions.

4. H2O (water): The interparticle forces present in water are hydrogen bonds. Water is a polar molecule with hydrogen bonding occurring between the hydrogen atom of one water molecule and the oxygen atom of another water molecule. 5. NaNO3 (sodium nitrate): The interparticle forces present in NaNO3 are ionic bonds. Sodium nitrate consists of Na+ cations and NO3- anions held together by electrostatic attractions.

6. P4 (phosphorus): The interparticle forces present in phosphorus are covalent bonds. Phosphorus forms P4 molecules through covalent bonding, where atoms share electrons7. CsI (cesium iodide): The interparticle forces present in CsI are ionic bonds. Cesium iodide consists of Cs+ cations and I- anions held together by electrostatic attractions. 8. C2H6 (ethane): The interparticle forces present in ethane are London dispersion forces. Ethane is a nonpolar molecule, and the temporary fluctuations in electron distribution result in temporary dipoles.

9. CO2 (carbon dioxide): The interparticle forces present in CO2 are London dispersion forces. Carbon dioxide is a nonpolar molecule, and the temporary fluctuations in electron distribution result in temporary dipoles. 10. SeO2 (selenium dioxide): The interparticle forces present in SeO2 are dipole-dipole interactions. Selenium dioxide is a polar molecule, and the positive end of one molecule attracts the negative end of another molecule.

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Answer:

The three main cycles of an ecosystem are the water cycle, the carbon cycle and the nitrogen cycle. These three cycles working in balance are responsible for carrying away waste materials and replenishing the ecosystem with the nutrients necessary to sustain life.

Explanation:

:)

Answer:

i became freinds with (friends name) because he liked me for me and he did not make fun of me when i did something inbarrasing at school he always made me lough to.

Explanation:

The correct option is (a) H₂S : SO₂ = 2 : 2 and O₂ : H₂O = 3 : 2

Molar ratio also known as stoichiometry is the ratio in which the reactants and products are either formed or reacted in the given equation

the balanced equation is as follows ;

2H₂S + 3O₂ --> 2SO₂ + 2H₂O

molar ratio can be determined by the coefficients of the compounds in the balanced reaction.

coefficient is the number in front of the chemical compound

coefficients for the compounds in this reaction are as follows ;

therefore, correct option is (a) H₂S:SO₂ = 2:2 and O₂:H₂O = 3:2

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In the hydroboration-oxidation reaction, the nucleophile is borane (BH3), and the reaction is regioselective due to the preference for adding to the less substituted carbon atom of the alkene.

In the given experiment, the nucleophile is the compound or species that donates a pair of electrons to form a new covalent bond with another atom or molecule.

In the context of hydroboration-oxidation, the nucleophile is the boron atom (B) in the reagent BH3 (borane). BH3 acts as a Lewis acid and forms a coordinate covalent bond with the nucleophile, which is typically an alkene.

The reaction is considered regioselective because it exhibits selectivity in the formation of a specific regioisomer. In hydroboration-oxidation reactions, the regioselectivity arises from the nature of the reaction mechanism.

During hydroboration, the boron atom adds to the alkene's least substituted carbon atom, resulting in the formation of an organoborane compound. Subsequent oxidation converts the organoborane to an alcohol.

The regioselectivity is primarily attributed to the preference of the boron atom to add to the carbon atom with fewer alkyl groups attached. This preference is due to the electronic and steric factors involved in the reaction mechanism.

The boron atom acts as an electron-deficient species and is attracted to the electron-rich double bond. However, the steric hindrance caused by the alkyl groups around the double bond influences the selectivity, favoring the addition to the less hindered carbon atom.

Overall, the regioselectivity of the hydroboration-oxidation reaction ensures the formation of the desired regioisomer by selectively adding the boron atom to the less substituted carbon atom of the alkene, leading to the synthesis of the target compound.

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