Which of these answers best describes ionic compounds?
A. Atoms share protons.
B. Atoms are held together by electrostatic forces.
C. Elements change into different elements.
D. Atoms share electrons.

Answer:

The average kinetic energy is increased by a factor of 3.

Explanation:

The average kinetic energy is given by:

\( \overline{E} = \frac{3}{2}kT \)

Where:

k: is the Boltzmann constant

T: is the temperature

When the temperature is 300 K we have:

\( \overline{E_{1}} = \frac{3}{2}300k \)  

Now, when the temperature is 900 K:

\( \overline{E_{2}} = \frac{3}{2}900k = 3(\frac{3}{2}300k) = 3\overline{E_{1}} \)  

Therefore, when the temperature is raised from 300 K to 900 Κ, the average kinetic energy is increased by a factor of 3.

I hope it helps you!

Answer: The answer is C

Explanation:

the answer is c

Answer:

Peers are helpful when overlooking something important before actually completing the assignment. This also applies to life as it can be valuable to have an outside perspective that can add new ideas you may have missed.

hope this helps :)

Answer:

that it i think

Explanation:

the earth revolves around the Sun once each year and spins on its axis of rotation once each day. This axis of rotation is tilted 23.5 degrees relative to its plane of orbit around the Sun. The axis of rotation is pointed toward Polaris the North Star. As the Earth orbits the Sun the tilt of Earth’s axis stays lined up with the North Star.

The answer for the particular question is probability and Schrodinger wave function.

The correct question would be :

an atomic orbital defines the __________ of finding an electron in a specific region of an atom. this electron density is referred by the square of the Schrodinger __________ function.

An atomic orbital is 3d structure where electrons are moving.

The Schrodinger wave equation connects the energy of an atom to its electrons with regard to the wave function of the electron. Each solution to the equation indicate an permits energy state of the atom and is connected with a specific atomic orbital.

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The intermolecular forces that act between a chlorine monofluoride (ClF) molecule and a nitrosyl chloride (NOCl) molecule are primarily dipole-dipole forces.

Both ClF and NOCl are polar molecules due to differences in electronegativity between their constituent atoms, resulting in a dipole moment. The partially negative end of ClF will be attracted to the partially positive end of NOCl, and vice versa, leading to a net attractive force between the two molecules.

Additionally, there may also be weaker London dispersion forces between the two molecules arising from temporary fluctuations in electron density. Overall, the dominant intermolecular forces between ClF and NOCl will be dipole-dipole forces.

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She will create a solution.

Answer:

c

Explanation:

Answer:

percent yield = 80.7%

Theoretical yield of silver sulfide = 30.975 g

Actual yield  = 25 g

Explanation:

Given data:

Mass of silver = 27 g

Mass of silver sulfide formed = 25 g

Theoretical yield of silver sulfide = ?

Actual yield = ?

Percent yield = ?

Solution:

Chemical equation:

2Ag + S   →     Ag₂S

Number of moles of Ag:

Number of moles = mass/molar mass

Molar mass of silver = 107.8 g/mol

Number of moles = 27 g/ 107.8 g/mol

Number of moles = 0.25 mol

Now we will compare the moles of silver with silver sulfide.

               Ag         :       Ag₂S

               2            :         1

              0.25        :      1/2×0.25 = 0.125 mol

Theoretical yield of silver sulfide:

Mass = number of moles × molar mass

Mass = 0.125 mol ×  247.8 g/mol

Mass = 30.975 g

Actual yield is given in question = 25 g

Percent yield:

Percent yield = (actual yield / theoretical yield) × 100

Percent yield = (25 g/ 30.975 g ) × 100

percent yield = 80.7%

To calculate the concentration of molecular, deprotonated, and protonated species in a water tank solution, we can use the pH and pKa values provided.

First, let's understand the relationship between pH and pKa. The pKa is a measure of the acidity of a compound. It tells us the pH at which the compound is half dissociated. A compound with a pKa lower than the pH is mostly in its protonated form, while a compound with a pKa higher than the pH is mostly in its deprotonated form.

In this case, the pH is 6.5 and the pKa is 1.87. The pH is higher than the pKa, so we expect the compound to be mostly in its deprotonated form.

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Answer:

190

Explanation:

Gold has atomic number of 79, which is the number of protons.

Mass number = #protons + #neutrons = 79 + 111 = 190

10 moles of ammonia, NH\(_3\) ​​​​​, are produced by reacting 5 moles of nitrogen gas, ​​​​​​​N\(_2\) ​​​​​​​​​​​​​, with excess hydrogen gas, ​​​​​​​H\(_2\).

In chemistry, a mole, sometimes spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, or even other predetermined particles.

The mole signifies 6.022×10²³ units, which is a very big quantity. The mole for the International System of Units is defined as this quantity by the General Conference on Measurement and Weights.

N\(_2\) + 3H\(_2\) → 2NH\(_3\)

moles of N\(_2\)=5 moles

the mole ratio between N\(_2\) and NH\(_3\) is 1:2

moles of NH\(_3\)= 10 moles

Therefore,  10 moles of ammonia, NH\(_3\) ​​​​​, are produced by reacting 5 moles of nitrogen gas, ​​​​​​​N\(_2\) ​​​​​​​​​​​​​, with excess hydrogen gas, ​​​​​​​H\(_2\).

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Answer:

yes you are doing it right my chemistry teacher said said so

A diprotic acid has a pka1 of 2.90 and a ph of 2.42 when it is dissolved in water at a concentration of 10.10 m.

2.90+log(0.025/0.075)

2.90+ (-0.48)=2.42 pH

Any acid with two hydrogen atoms in it that can be ionized or released in water, such as carbonic acid and sulfuric acid. With a known concentration of NaOH solution, a diprotic acid is titrated. Molar mass, also known as molecular weight, is measured in grams per mole of diprotic acid. You can determine the acid's mass in grams by weighing the original sample. By measuring how much NaOH titrant is required to reach the first equivalence point, moles can be identified. Dibasic or diprotic acid is an acid that has two available protons for donation. Dibasic salt is a salt that has two cations in place of two hydrogen atoms in the parent acid. a dicarboxylic acid ester known as a dibasic ester.

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Answer:

A:petal

B:pistil

C:stamen

Explanation:got it right on edu 2021

Answer:

C

A

B

Explanation: on ED about Identifying Earth’s Layers

Answer:

B. Potassium Sulfate

Explanation:

SO4=sulfate

-2 charge cancels

Answer:

B. Potassium Sulfate

Explanation: for clever users /plato

Answer:

based on texture/ feel, oder/smell, melting/boiling point

Explanation:

Answer:

Smell it, drink it, throw it at someone.

Explanation:

If none of that hurts or kills anyone, you can mark everything that would off the list.

Answer:

A

Explanation:

Answer:

able to evaporate

Explanation:

gas is evaporated liquid...... the process cannot take place again

Rock properties such as cleavage, fractures, and bedding planes reduce the mechanical strength of rock and may allow for downhill slippage.

The various characteristics of rocks that are of interest and importance to geologists and other professionals who work with rocks and rock materials are known as rock properties. In addition to the classification and physical properties of rocks, the mechanical, hydrologic, thermal, and electrical properties of rocks are also important.

The physical characteristics of rocks include color, texture, and structure. Rock texture, which refers to the size and arrangement of mineral crystals, is used to distinguish rocks. Cleavage, fractures, and bedding planes are all structural features of rocks that have a significant impact on their mechanical strength, and as a result, their stability.

Fractures, cleavage, and bedding planes can significantly lower the strength of rocks. Fractures, which are cracks in the rock's surface, are the most frequent structural feature. Bedding planes, which are layers of rock that have distinct properties, and cleavage planes, which are parallel fractures that give the rock a tendency to break along specific planes, are examples of other structural features. This lack of mechanical strength allows rocks to slide downhill or collapse quickly.

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Answer:

solvent which contains very little of the substance being dissolved is called a dilute solution

Slaked lime is the ans

thank me later : p

Answer:

4.4 moles of water

Explanation:

Propane is C3H8. Is the chemical equation, you wrote C2H8 which is wrong. Type everything properly and give a check before finally posting the question.

The chemical equation that is given, is not properly balanced. The BALANCED equation would be

C3H8 + 5O2 → 3CO2 + 4H2O

From this balanced chemical equation, we see that 5 moles of oxygen produce 4 moles of water.

5 moles of Oxygen → 4 moles of water

1mole of oxygen → \(\frac{4}{5}\) moles of water

5.5 moles of oxygen → (\(\frac{4}{5}\) × 5.5) moles of water = 4.4 moles of water

∴ The reaction of 5.5 mol of O2 will produce 4.4 mol of H2O. [Answer:]

Answer:

5.5

Explanation:

First, you will need to balance the equation ( the equation in your question is not balanced....typo?)

C2 H8    + 4 O2   ===> 2 CO2   + 4 H2O

Now, from the balanced equation:

O2 : H2O =  4/4 = 1/1

SO   5.5 MOLES  OF  O2  PRODUCES 5.5 MOLES  H20  

Among the given sodium salts, only NaHCO3 (option d) will produce a basic solution when added to pure water, as its basic reaction has a higher equilibrium constant than its acidic reaction.

In an amphiprotic ion, the basicity of the solution depends on the equilibrium constants for the acidic (Ka) and basic (Kb) reactions.

A basic solution is formed when Kb > Ka. For NaHCO3, the given values are Kg = 4.69x10-4 and Ky = 2.24x108. Since Ky > Kg, NaHCO3 will produce a basic solution.

The other salts do not have this property.

NaHSO4 and NaHCO3 can produce a basic solution when added to pure water due to their amphiprotic nature.

Summary: Among the given sodium salts, only NaHCO3 (option d) will produce a basic solution when added to pure water, as its basic reaction has a higher equilibrium constant than its acidic reaction.

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According to the graph, only the reactant A was present at the beginning of the reaction.

The graph shows the concentration for the reactant A and the product that is A2. In this graph, the concentration is displayed on the vertical axis, while the horizontal axis shows the time.

In general terms, it can be observed that at the beginning only the reactant A is present, but as the reaction occurs the concentration of this reactant decreases, while the concentration of the product A2 increases.

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Answer:

2na+o2

Pls mark as brainliest

Answer:

A

Explanation:

2NA + 02

These are your reactants, which are always on the left side of the chemical equation.

hope this helped mark brainliest pls xx

The number of gold atoms in the 120.0g sample of gold(III) chloride is approximately 1.189 x 10^23 atoms.

To calculate the number of gold atoms in a sample of gold(III) chloride (Au2Cl6), we need to consider the molar mass of Au2Cl6 and Avogadro's number.

The molar mass of Au2Cl6 can be calculated by adding the atomic masses of gold (Au) and chlorine (Cl):

Molar mass of Au2Cl6 = (2 * atomic mass of Au) + (6 * atomic mass of Cl)

Using the atomic masses from the periodic table:

Molar mass of Au2Cl6 = (2 * 196.97 g/mol) + (6 * 35.45 g/mol)

Molar mass of Au2Cl6 = 393.94 g/mol + 212.70 g/mol

Molar mass of Au2Cl6 = 606.64 g/mol

Now, we can use the molar mass of Au2Cl6 to calculate the number of moles in the 120.0g sample using the formula:

Number of moles = Mass / Molar mass

Number of moles = 120.0g / 606.64 g/mol

Number of moles = 0.1977 mol

To find the number of gold atoms, we can multiply the number of moles by Avogadro's number:

Number of gold atoms = Number of moles * Avogadro's number

Number of gold atoms = 0.1977 mol * (6.022 x 10^23 atoms/mol)

Number of gold atoms = 1.189 x 10^23 atoms

Therefore, the number of gold atoms in the 120.0g sample of gold(III) chloride is approximately 1.189 x 10^23 atoms.

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If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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