describe the similarities of compound and elements​

Answer:

C

Explanation

the most important factor is the angle that the sunlight hits the earths surface

Answer:

100.761°C

Explanation:

ΔTb≡Tb−Tb*=iKbm,

where:

ΔTb is the change in boiling point in ∘C, from that of the pure solvent, Tb*, to that of the solution, Tb.

i is the van't Hoff factor, i.e. the effective number of solute particles in solution.

Kb=0.512∘C/m is the boiling point elevation constant of water.

m is the molality of the solution... mol solute/kg solvent. Is the solute volatile or nonvolatile?

Assuming 100% dissociation...

KCl(aq)→K+(aq)+Cl−(aq)

and 1+1=2≈i, so...

Tb=Tb*+iKbm

=100°C+2×0.512°C/m×0.743 m

=100.761°C

Oxygen can only generate two bonds because it needs two additional electrons to complete its octet, after which it will run out of empty orbitals in which to receive additional electrons and create additional bonds.

These compounds have four, three, two, and one bonds between the carbon, nitrogen, oxygen, and chlorine atoms, respectively.

Oxygen typically contains two bonds, but it can also have three. If it has three bonds, it will be positively charged. An oxygen atom frequently has just one link, although the atom is negatively charged. Halogens typically only have one bond; polyatomic ions are significant exceptions.

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When the reaction creates 68 grams of ammonia from 56 grams of nitrogen in the beginning.

Since there are 3 hydrogen atoms and 1 nitrogen atom in ammonia (NH3), we may calculate nitrogen's atomic mass by adding the molar masses of the two atoms. In this case, nitrogen weighs 14 and hydrogen, 3x1=3, making 14+3=17g.

Since each nitrogen atom needs three electrons to fill its outermost shell, nitrogen atoms will establish three covalent bonds (also known as triple covalent) between two nitrogen atoms.

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The final temperature of the cup may be less than accurate thereby affecting the entire results of the experiment carried out using the cup.

A styrofoam cup is an insulated material. A styrofoam cup prevents heat gain or looses from the cup. Heat is gained by the water inside the styrofoam cup. The cup prevents exchange of energy with the environment.

When water is lost from the styrofoam cup, the final temperature of the cup may be less than accurate thereby affecting the entire results of the experiment carried out using the cup.

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Answer:

true

Explanation:

one reason is because plants need sunlight and water because it is their source of food

Answer:

b:  

Jacque could check if the rock layer has fossils in it.

Explanation:

!!!!!! that's what 4 of my teachers said

Answer:

cause it is unused energy u didn't burn off

Answer:

fat realses the most energy because they give more ATP per molecule which takes less space to store and are less heavy than glucose

The patterns of water use in the USA vary based on different factors such as the geography, climate, and the type of usage

Water usage can cause various problems if not managed properly such as pollution and scarcity.

Some areas in the US have abundant sources of water while others are water-scarce.

Agriculture is the largest water user in the US, followed by municipal and industrial uses. Irrigation is the main water usage in agricultural areas, while urban areas tend to use water for drinking, bathing, and other household purposes.

Excessive water usage can also lead to water scarcity, water pollution, and other environmental problems. Additionally, water usage conflicts can arise between different regions, states, and even countries. Therefore

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A piano contains both mechanical and acoustic energy. Mechanical energy is created when you press a key; as a result, the strings vibrate when the hammer strikes them, producing sound.

What converts thermal energy to electrical energy?

Using a thermoelectric generator, thermal energy can be transformed into electrical energy.

What is thermal energy?

The term "thermal energy" is used a lot of different ways in physics and engineering. It may be related to a number of different physical concepts.

What is electric energy?

Electrical energy is related to forces on electrically charged particles and the motion of electrically charged particles, frequently electrons in wires.

Hence mechanical and acoustic energy is a correct answer.

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t-BuOK is the only base that cannot deprotonate a terminal alkyne out of the given bases.

Terminal alkynes are acidic in nature due to the presence of a hydrogen atom on the sp carbon. The acidity of terminal alkynes allows them to be deprotonated by strong bases to form acetylide ions.

t-BuOK is a weak base and has a limited ability to remove a proton from a terminal alkyne. Therefore, it cannot form an acetylide ion and cannot act as a nucleophile towards electrophiles.

On the other hand, CH3CH2Li, CH3CH2ONa, NaH, and NaNH2 are strong bases and can easily remove the proton from a terminal alkyne to form an acetylide ion. Acetylide ions are very useful in organic chemistry and are commonly used in reactions such as alkynylation, alkylation, and cross-coupling reactions.

In summary, t-BuOK is the only base that cannot deprotonate a terminal alkyne out of the given bases.

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The molar mass of the unknown gas is 142.53 g/mol.

Graham's law states that the square root of a gas's molar mass is inversely proportional to the rate of effusion of that gas (r) (M).

rH₂/rX = √[M(X)/ M(H₂)]

(rH₂/rX)² = M(X)/ M(H₂)

M(X) = (rH₂/rX)² × M(H₂)

M(X) = (8.4)² × 2.02 g/mol

M(X) = 164 g/mol

Therefore, molar mass of the unknown gas is 142.53 g/mol.

According to Graham's Law, a gas's rate of effusion is inversely related to the square-root of its molecular mass. The gas whose molecular weight is lowest will effuse first.

Based on the molar weights of the two gases, the rate of effusion calculator determines the rate of diffusion or effusion of one gas into another. Depending on the rate of diffusion, it can also provide you with the molar weight of a gas.

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1. Write the name of the reactant carbonic acid Draw arrows to indicate the direction of the chemical reaction → Write the name of each product separated by a plus sign (+) to the right of the arrow carbon dioxide + water.

2. Sulphuric acid

Hydrochloric acid is also known as hydrochloric acid or hydrochloric acid. Since hydrochloric acid and hydrogen chloride are the same compounds, they have the same molecular formula HCl. However, in federal states it is different. Hydrogen chloride occurs in gaseous form at room temperature and pressure.

Dry acid is used in pools and spas to lower pH and maintain total alkalinity TA. It is safer and easier to use than hydrochloric acid. It is easy to store but requires careful handling. Hydrochloric acid and sulfuric acid are two strong acids. The main difference between hydrochloric acid and sulfuric acid is that hydrochloric acid is monobasic whereas sulfuric acid is dibasic.

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Ocean and wind currents are both caused by

So,option A is correct one.

The air that moves in a river like a flow in a particular direction is called wind current.

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Answer:

A. The identify of the poison used in a murder.

Explanation:

Answer:

Lower Miniscus

Explanation:

You just do.

Answer:

option first is the right answer

A molecule is created when two or more atoms chemically bond together. A compound is created when atoms from two or more distinct elements combine.

Although not every molecule is a compound, every compound is a molecule. One oxygen atom and two hydrogen atoms combine to make the compound water. Additionally, molecules are collections of atoms joined by covalent connections. Compounds that are molecules are referred to as molecular compounds. It displays the actual number of atoms that are present in a molecule.

Let's now examine the process by which atoms are fused.

Covalent or ionic bonds can be used to bind molecules together. Like hydrogen, which only exists as a hydrogen molecule, many non-metal elements exist in the environment as molecules. Homonuclear molecules are made up of two or more atoms of the same element.

When atoms interact due to their shared electrons, molecules are created. Electrons could accomplish it in two different ways. When two atoms share electrons, the sharing creates a bond that binds the two together. These are referred to as covalent bonds.

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The properties of ammonium lauryl sulfate that make it a feasible surfactant is its solubility and being able to disrupt hydrogen bonding in water.

They are used as detergents and emulsifiers through to their ability to reduce surface tension between substances.

Hydrogen bonds are the primary contributor to the high surface tension of water which is why their ability to disrupt it makes it to be a good surfactant.

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Answer:

its nuber 3

wdPDAPS

Explanation:

The new volume of the balloon should be approximately 192.29 cm. From the given options,  the closest answer choice is 188 cm.

To solve this problem, we can use the combined gas law equation, which states that P₁V₁/T₁ = P₂V₂/T₂. Since the pressure is constant, we can simplify the equation to V₁/T₁ = V₂/T₂.  We know that the initial temperature (T₁) is 278 K and the initial volume (V₁) is 417 cm. Let's assume the final temperature (T₂) is 128 K (a decrease of 150 K). We can solve for V₂ by plugging in the values and solving for V₂:

V₁/T₁  = V₂/T₂

417/278 = V₂/128
V₂ = 192.29 cm

Therefore, the new volume of the balloon should be approximately 192.29 cm, which is not one of the answer choices. However, the closest answer choice is 188 cm, which is within a reasonable margin of error. So, the answer would be 188 cm.

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Answer:

924 cm3

Explanation:

Answer:

Option B.

C₆H₁₀O₅ + 6O₂ —> 6CO₂ + 5H₂O

Explanation:

To know which option is correct, we shall write the balanced equation for the combustion of cellulose. This is illustrated below:

C₆H₁₀O₅ + O₂ —> CO₂ + H₂O

There are 6 atoms of C on the left side and 1 atom on the right side. It can be balance by writing 6 before CO₂ as shown below:

C₆H₁₀O₅ + O₂ —> 6CO₂ + H₂O

There are 10 atoms of H on the left side and 2 atoms on the right side. It can be balance by writing 5 before H₂O as shown below:

C₆H₁₀O₅ + O₂ —> 6CO₂ + 5H₂O

There are a total of 7 atoms of O on the left side and a total of 17 atoms on the right side. It can be balance by writing 6 before O₂ as shown below:

C₆H₁₀O₅ + 6O₂ —> 6CO₂ + 5H₂O

Now, the equation is balanced.

Thus, option B gives the correct answer to the question.

The statement is true. An dipole occurs when one molecule with a permanent dipole repels another molecules electrons causing the electrons to be more concentrated on one end of the molecule than another.

Dipole-dipole attraction:

Dipole-dipole forces are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule.

For molecules of similar size and mass, the strength of these forces increases with increasing polarity. Polar molecules can also induce dipoles in nonpolar molecules, resulting in dipole-induced dipole forces.

A molecule with a permanent dipole moment is called a polar molecule. A permanent dipole occurs when two atoms in a molecule have substantially different electronegativity.

Therefore a dipole occurs when one molecule with a permanent dipole repels the electrons of another molecule to be more concentrated on one end of the molecule than another is a true statement.

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The solvent typically used for vanillin reduction experiments is ethanol or a mixture of ethanol and water.

In a vanillin reduction experiment, the aim is to reduce the aldehyde functional group present in vanillin to an alcohol. A common reducing agent for this reaction is sodium borohydride (NaBH4). The choice of solvent is crucial for the reaction to proceed smoothly.

A suitable solvent for vanillin reduction experiment would be a polar, aprotic solvent such as dimethyl sulfoxide (DMSO) or dimethylformamide (DMF). These solvents can dissolve both vanillin and the reducing agent, allowing the reaction to occur effectively.

To summarize, in a vanillin reduction experiment, you can use polar aprotic solvents like DMSO or DMF as the solvent to facilitate the reduction of the aldehyde group in vanillin to an alcohol.

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the complete question is:

What are the reducing agents for vanillin reduction experiment?

Answer:

\(c=3.71\ J/g^{\circ} C\)

Explanation:

Given that,

Mass of sample, m = 996.9 g

The change in temperature of the sample, \(\Delta T=-70.98^{\circ}C\)

Heat produced, Q = 62.9  calories = 263173.6 J

The heat released by a sample due to change in temperature is given by :

\(Q=mc\Delta T\)

Where

c is the specific heat capacity

So,

\(c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{263173.6}{996.9\times 70.98}\\\\c=3.71\ J/g^{\circ} C\)

So, the specific heat of ethanol is equal to \(3.71\ J/g^{\circ} C\).

Earth climate has stayed same thougout the past

Adenosine triphosphate (ATP) and lactic acid both relate to cellular respiration in different ways. as ATP and lactic acid are both involved in cellular respiration.

Cellular respiration is the process by which the cell produces ATP (adenosine triphosphate), which is used for energy by the cell, and lactic acid is produced as a byproduct of the process. The complete breakdown of glucose into carbon dioxide and water, with the production of ATP, is known as cellular respiration.

ATP is synthesized during cellular respiration, a process in which the cell breaks down food molecules such as glucose and converts them into energy (ATP). The process can occur in two ways: aerobic respiration and anaerobic respiration. Aerobic respiration is a type of cellular respiration that requires oxygen. In the absence of oxygen, anaerobic respiration can occur.

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Answer: i think its (b) be abundant in the crust

Explanation: