Calculate the root mean square velocity for the N2 gas at 11. 8 degree celcous (R=8. 3145 JK-1 mol-1)

Answer:

2.1×6.02×1023÷ 14

9.03×1022 atom of nitrogen

Explanation:

Answer: Activation energy is defined as the minimum amount of extra energy required by a reacting molecule to get converted into product. It can also be described as the minimum amount of energy needed to activate or energize molecules or atoms so that they can undergo a chemical reaction or transformation.

Explanation:

Answer:

It is ultracool dwarfs make up about 15% of the astronomical objects.................blah blah blah

Explanation:

took test

Answer:

it is a result of hydrogen bonds present within water molecules.

Explanation:

when the water is transformed to ice at zero degrees Celsius, the water molecules are in crystal lattice in a structure that has a lot of empty space around each molecule.

The solubility of a substance is influenced by many factors, including temperature, pressure, and the type of solvent used. Knowing the solubility of a substance can be useful in a variety of applications, such as:

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Answer:

B) It is not balanced for oxidation state or for number of atoms

Explanation:

I got this question correct on my Edge quiz, so I know that this is the right answer.

The reactant side has 2 oxygen atoms, while the product side only has 1. This means the mass isn't balenced. In addition, the oxidation (charge) on the reactant side is 0, while it's -2 on the product side. This means the oxidation nor mass is balenced.

Hope that helps you!

Answer:

b

Explanation:

One reason why so many aliphatic amino acids are essential is that they cannot mix with water, and therefore cannot be synthesized by the body.

Another reason is that the human body lacks the enzymes necessary to produce these amino acids.

Aliphatic amino acids are essential because humans cannot produce them on their own. They must be obtained from the diet, which is why they are called "essential" amino acids.

Aliphatic amino acids are non-polar and hydrophobic, and their hydrophobicity increases as the number of carbon atoms on the hydrocarbon chain increases.

Histidine, an aliphatic amino acid, is also essential because it contains a functional group that is important for many biological processes.

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Answer is B-  He can arrange the beads into various formations using different colors and sizes multiple times

Explanation: I hope the helped!

Peter can arrange the beads into various formations using different colors and sizes multiple times.

The periodic table, also known as the periodic table of the elements, is a tabular display of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is generally seen as an icon of chemistry.

In order to show how compounds form in nature, the beads will be assigned to the different elements on the periodic table according to the following arrangements;

With the above arrangements, it will be possible to show the affinity and proportion of the elements in the compound formed in nature.

Therefore, Peter can arrange the beads into various formations using different colors and sizes multiple times.

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Answer:

1.33%

Explanation:

In an aqueous solution, a weak acid such as acetic acid, will be in equilibrium with its conjugate base, acetate ion, thus:

CH₃CO₂H(aq) + H₂O(l) ⇌ H₃O⁺(aq) + CH₃CO₂⁻(aq )

Where dissociation constant, ka, is defined as the ratio of concentrations of products and reactants:

Ka = 1.8x10⁻⁵ = [H₃O⁺] [CH₃CO₂⁻] / [CH₃CO₂H]

H₂O is not taken into account in the equilibrium because is a pure liquid

When a solution of acetic acid becomes to equilibrium, the original concentration of the acid decreases producing more H₃O⁺ and CH₃CO₂⁻.

The concentrations at equilibrium when a 0.100M solution of acetic acid reaches this state, is:

[CH₃CO₂H] = 0.100M - X

[H₃O⁺] = X

[CH₃CO₂⁻] = X

Where X is reaction coordinate.

Replacing in Ka expression:

1.8x10⁻⁵ = [H₃O⁺] [CH₃CO₂⁻] / [CH₃CO₂H]

1.8x10⁻⁵ = [X] [X] / [0.100M - X]

1.8x10⁻⁶ - 1.8x10⁻⁵X = X²

1.8x10⁻⁶ - 1.8x10⁻⁵X - X² = 0

Solving for X:

X = -0.00135 → False solution. There is no negative concentrations.

X = 0.00133 → Right solution.

That means concentration of acetate ion is:

[CH₃CO₂⁻] = 0.00133M.

Now, percent ionization is defined as 100 times the ratio between weak acid that is ionizated, [CH₃CO₂⁻] = 0.00133M, per initial concentration of the acid, [CH₃CO₂H] = 0.100M. Replacing:

% Ionization = 0.00133M / 0.100M × 100 =

Answer:

94.15

Explanation:

Answer:

3 sometimes 4

Explanation: there are usualy

3 layers of paint but sometime manufacterers add paint protection film to bring the total up to 4

Answer: In atomic theory and quantum mechanics, an atomic orbital is a mathematical function describing the location and wave-like behavior of an electron in an atom. This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom's nucleus

Explanation:

Significant figures are important because they indicate the precision of a measurement.

Precision:

The precision of a substance is defined as the degree to which two or more measurements agree with one another. It is incredibly precise but not always accurate to measure something if you weigh it five times and get 3.2 kg each time. Accuracy is not necessary for precision. You can learn how to be accurate but not precise by looking at the examples below. There are various categories of precision:

Repeatability:

The fluctuation that results from taking multiple measurements under the same circumstances in a short amount of time.

Reproducibility:

The variation occurs when several instruments, operators, and longer time periods are used in the same measurement process.

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Answer:

When 14.51 grams of methane are burned, the number of moles of oxygen gas used can be determined by using the balanced chemical equation:

CH4 + 2 O2 -> CO2 + 2 H2O

Since the coefficients in the equation represent the mole ratios of the reactants and products, we can use the number of moles of methane as the basis for calculating the number of moles of oxygen.

First, we'll calculate the number of moles of methane:

moles of CH4 = 14.51 g / 16.04 g/mol = 0.905 mol

Next, we'll use the mole ratio of CH4 to O2 to determine the number of moles of O2 required for the reaction:

moles of O2 = 2 * moles of CH4 = 2 * 0.905 mol = 1.81 mol

So, the amount of oxygen used is 1.81 moles.

.

AgNO3 reacts with chloride ions in the medium to form a visible precipitate, while NaCl does not react and remains invisible.

Agar plates provide a solid surface for bacteria or other microorganisms to grow on and can be used to isolate and culture individual colonies.

The diffusion of substances on an agar plate depends on factors such as the size and charge of the molecules, as well as any chemical reactions that may occur with other substances in the medium. For example, AgNO3 reacts with chloride ions in the medium to form a visible precipitate, while NaCl does not react and remains invisible.

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12 moles O2 is a possible way to describe the elemental oxygen component in the reaction.

Define elemental oxygen form?

At normal temperatures and pressures, elemental oxygen is present as a gas, most frequently in the form of O2. This crucial ingredient, which is a crucial part of cellular respiration, is required for life on this planet.

This oxidation-reduction (redox) reaction is taking place:

8 S - 48 e- → 8 S (oxidation)

24 O + 48 e- → 24 O- (reduction)

O2 is an oxidizing agent, whereas S8 is a reducing agent.

Because each substance contains a huge number of atoms and molecules, we use the mole (mol) to express the amount of substances in chemistry. For the researcher who discovered how many atoms there are in 12 grams of carbon, the value provided, 6.022 x 1023 is known as Avogadro's number.

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According to the given picture:

A represents the atomic number.

B represents the chemical symbol.

C represents the atomic mass.

D represents the name of the element.

All of the above provide the forces that drive the movement of chromatids toward opposite spindle poles during anaphase.

What is anaphase?

Anaphase is the third stage of cell division, which occurs between metaphase and telophase, and is characterized by movement. Following are the forces that drive the movement of chromatids toward opposite spindle poles.

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Answer:

the smallest thing in the world

Explanation:

Answer:

It is the smallest particle of the elements that exists ob the earth

BF3

Electron pair geometry - Trigonal planar

Molecular geometry- trigonal planar

A molecule's three-dimensional atomic arrangement is known as its molecular geometry. It is related to the bond angle and bond angle. For BF3, the three bond pairs are positioned at the triangle's four corners to create a trigonal planar shape with a 120-degree bond angle.

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Answer:

THE CORRECT ANSWER IS D

Explanation:

A, B, and C are incorrect. I took the test so I know. Hope this helps

First, we write down our reaction:

N2 + 3H2 → 2NH3

Don't forget to balance it.

We only use moles as units.

Procedure:

3 x 1 mole H2 ------------ 2 x 1 mole NH3

3.1 moles H2 ------------- x

x = 2.1 moles NH3 are produced

Answer: 2.1 moles NH3

Oxaloacetate contains 4 carbons. Acetyl-CoA contains 2 carbons in its acetyl group. Citric acid contains 6 carbons. In the first reaction of the citric acid cycle, acetyl-CoA combines with oxaloacetate to form citrate.

The acetyl group of acetyl-CoA is transferred to oxaloacetate, and a molecule of CoA is released. The resulting citrate molecule has 6 carbons. The citric acid cycle is a series of chemical reactions that occur in the mitochondria of cells. The cycle is responsible for the oxidation of acetyl-CoA, which produces energy in the form of ATP. The cycle also produces NADH and FADH2, which are used in the electron transport chain to produce more ATP. The citric acid cycle is a critical part of cellular respiration, and it is essential for the production of energy.

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The evidence for atoms having nuclei with a relatively small size compared to the entire atom comes from a variety of sources.

One of the most important is the fact that atoms are largely empty space. If the nucleus were a significant fraction of the size of the entire atom, we would expect to see much less empty space in the structure of matter than we actually observe.

Additionally, experiments using X-rays and other high-energy particles have shown that these particles are scattered by the electrons in atoms, indicating that the electrons occupy a relatively large space compared to the nucleus.

Finally, studies of atomic spectra have revealed that certain lines in the spectra correspond to transitions between energy levels in the nucleus, suggesting that the nucleus is indeed a small, highly concentrated region within the atom.

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Answer:

The major potential environmental impacts associated with mining and associated mineral processing operations are related to erosion-prone landscapes, soil and water quality, and air quality.

Explanation:

Plants were native to the mining site and making sure the soil is healthy are the examples of environmental concerns taking into account by a mining company when it created a reclamation plan for a mine site.

Land use may change as a result of mine exploration, construction, operation, and maintenance.

It may also have detrimental effects on the environment, such as deforestation, erosion, contamination of nearby streams and wetlands, alteration of soil profiles, increased noise levels, and dust.

Mining is a naturally invasive operation that can alter the landscape over a much wider region than the actual mining site.

Therefore, years after a mine closes, the impacts of this harm can still be felt, adding to greenhouse gas emissions, causing flora and fauna to die, and eroding the land and environment.

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Answer:

b

Explanation:

Endothermic reactions absorbs heat energy. when you toast your bread, you make use of heat which the piece of bread absorbs to become toasted.

Answer:

p = 36400 kg·m/s

Explanation:

p=mv

p= Momentum

m= mass (1300 kg)

v= 28

1300 × 28

= 36400 kg·m/s

The Momentum of the car is 36400 kg-m/s.

Momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction.  m is an object's mass and v is its velocity

Given that,

(m is an object's mass and v is its velocity)

To find :

The momentum of car, p

Solve :

Let p is the momentum of an object. It can be calculated by the product of mass and its velocity. The formula to find it is given by :

p = m x v

  = 1300 x 28

  = 36400 kg-m/s.

Therefore, the momentum of the car is 36400 kg-m/s.

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Answer:

The speed of sound in air is 333.33 m/s

Explanation:

The parameters given are the time it takes for the sound to male it to the cliff and back = 30 times in 9 seconds

Distance to the cliff = 50 meters

Therefore, the sound covers a distance of 30 × 100 = 3000 meters in 9 seconds

Which give the speed of sound in air using the formula for speed = Distance/Time

Therefore, the speed of sound in air = 3000/9 = 333.33 m/s.