which type of substance ionizes completely and creates hydronium ions when dissolved in water? (5 points) strong acid strong base weak acid weak base

The root mean square speed of O₂ gas molecules under the same conditions is 521.04ms⁻²

Kinetic energy is the energy an object has because of its motion

Here given data is

He gas = 6950 j/mol

We have to find root mean square = ?

So the formula is to find root mean square is

Vrms = √RT/m

Vrms = RMS velocity of the gas

T = absolute temprature of the gas

M = molar mass of the gas

R = universal gas constant

So, average molar kinetic energy of gas

E = 1/2 mv²rms = 1/2 RT

This equation reveal that molar KE is independent of the nature of the gas and it only depends on temprature as ideal behavior is concerned and so both He and O₂ will have same KE = 6950 j/mol and under the same condition of temprature

So for O₂

1/2 m O₂ V²rmsO₂ = 6950 j/mol

Taking atomic mass of O₂ = 16g/mol

V²rmsO₂ = 6950 × 2/2×16g/mol

VrmsO₂ = √69500000/16g/mol

VrmsO₂ = 521.04ms⁻²

Root mean square speed of O₂ gas molecules is 521.04ms⁻²

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The ground state of an atom is defined as the lowest energy state of the atom, where all electrons are in the lowest energy levels possible.

Among the given options, the correct definition of the ground state of an atom is the one that describes the lowest energy state of the atom with all electrons in the lowest energy levels possible. In the ground state, electrons occupy the lowest available energy levels around the nucleus according to the Aufbau principle. This state represents the most stable configuration for the atom. It is important to note that the ground state does not involve the gaining or losing of electrons (option a), formation of stable bonds (option c), or having a full valence shell of electrons (option d). The ground state simply refers to the lowest energy arrangement of electrons within the atom's orbitals.

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The correct net ionic equation for the reaction;

Na₂SO₃(aq) + 2HBr(aq) → 2NaBr(aq) + H₂O(l) + SO₂ (g) is

SO₃²⁻(aq) + 2H⁺(aq)  → H₂O(l) + SO₂(g). Hence, option A is correct.

Ionic equations are the name given to chemical equations where electrolytes are represented as dissociated ions.

They are frequently employed to symbolize the displacement reactions that occur in aqueous media. Some ions engage in these processes, while others do not.

The total number of dissociated ions in a chemical reaction is shown by the entire ionic equation.

Thus, the correct equation is SO₃²⁻(aq) + 2H⁺(aq)  → H₂O(l) + SO₂(g).

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Answer:

Al3+

Explanation:

Aluminium has an electronic configuration of 2, 8, 3 and the outermost valence electrons is +3 since it is a metal

Elements acquire positive or negative charges by losing or gaining electrons. The element which have 3+ charge among the options is boron (B) Hence, option B is correct.

Boron is 5th element in periodic table and it is classified into 13th group. Boron is a metalloid and shows properties intermediate to metals and non metals.

The electronic configuration of boron is K =2, N =3. Atoms lose or gain electrons as per their valency to become stable. According to octet rule atoms become stable when their valence shell get completely filled.

Boron have 3 electrons in its valence shell. If it donate these three electrons into an electronegative atom, its K shell become its valence shell and it is completely filled. Thus boron becomes stable.]

When atoms loses electrons they acquire positive charge and this charge is numerically equal to the number of electrons lost. Thus boron acquire 3 unit of positive charge by donating its 3 electrons. Hence, option B is correct.

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Your question is incomplete. But your complete question probably was :

Which element below would have a 3+ charge as an ion?

answer choices.

nitrogen (N).

boron (B).

silicon (Si).

argon (Ar)

Answer:

Explanation:

Some substances are poor conductors because they do not possess freely moving ions but they conduct electricity in their aqeous solution beacuse their ions become free to move when dissolved in water. Common example of such substances is NaCl which is commnly called table salt

Molecules are the smallest chemical units of matter that retain the chemical properties of a substance. They are formed by the combination of two or more atoms held together by chemical bonds, either through sharing or transfer of electrons.

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Answer: \(2HF(aq)+Cl_2(g)\rightarrow F_2(g)+2HCl(aq)\) will not occur.

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.

A general single displacement reaction can be represented as :

\(X+YZ\rightarrow XZ+Y\)

a) \(2HF(aq)+Cl_2(g)\rightarrow F_2(g)+2HCl(aq)\)

Flourine is more reactive than chlorine and hence this reaction cannot occur.

b) \(2Na(s)+ZnF_2(aq)\rightarrow 2NaF(aq)+Zn(s)\)

Sodium is more reactive than zinc and hence the reaction will occur.

c) \(Fe(s)+CuCl_2(aq)\rightarrow FeCl_2(aq)+Cu(s)\)

Iron is more reactive than copper and hence the reaction will occur.

d) \(2HCl(aq)+Mg(s)\rightarrow MgCl_2(aq)+H_2(g)\)

Magnesium is more reactive than hydrogen and hence the reaction will occur.

Answer:

True

Explanation:

Cell specialization is the process by which generic cells change into cells meant to do certain tasks within the body

hope this helps :)

Answer:

c

Explanation:

cuz

Answer:

The correct answer is - false.

Explanation:

At the energy-generating station, when the coal is burned, the chemical energy store in the coal converted into thermal energy and light or luminous energy.

The thermic energy generated used to heat and boil the water or liquid to generate the gas and generate the kinetic energy to move the fan that is desgined to generate the electrical energy.

Thus, the statment is false statement as it does not convert into sound energy.

Chemist carries out this reaction and obtains 11.4 g of tungsten. if the percent yield is 89.4%, The mass of WO₃ was used is 16.1 g.

given that :

percent yield = 89.4%

theoretical yield = 11.4 g

the percent yield = (actual yield / theoretical yield ) × 100 %

Theoretical yield = (actual yield / percent yield ) × 100 %

                            = (11.4 g / 89.4 ) × 100 %

                           = 12.8 g

The mass of the WO₃ = (12.8 g W / 183.84 g/mol W ) ×231.84 g/mol  WO₃

                               = 16.1 g  WO₃

The mass of  was used is 16.1 g.

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Radiation used in the processing of food is intended to increase the rate of nutrient decomposition. Therefore, option 1 is correct.

As a mutagen, radiation has the potential to eventually cause cancer. Radiation has the power to kill cells or harm the DNA within them, which impairs the cells' capacity for reproduction and may ultimately result in cancer. High energy particles flow through your body when radiation is present.

Food can be effectively preserved using irradiation, which increases its shelf life and lowers the likelihood of food spoilage. The method benefits the consumer as well by lowering the danger of illnesses brought on by foodborne infections.

Thus, option 1 is correct.

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Answer:

PLA is very user friendly that is stronger and stiffer than other materials. It melts easily and doesn't warp very often. Although it is very brittle, it still is a very popular material choice.

Explanation:

The computation of the theoretical speed of the sound wave simply shows that the speed is 345.4m/s.

It should be noted that a sound wave simply consist of compressions and rarefactions that move at certain speed.

From the complete question, the theoretical speed of sound will be:

= 331 + (0.6 × T)

= 331 + (0.6 × 24)

= 331 + 14.4

= 345.4m/s.

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B

The sodium hydroxide (NaOH) solution is a basic solution, so the pH of that solution should be close to 14

then when adding hydrochloric acid (HCl) we start to neutralice the solution, meaning the pH must sift slowly to lower pH.

Assuming both solutions have similar concentration the pH shall shift form basic (above 7) to acid pH (below 7). Until now both B and D images agreed with the explanation given. To chose between them we need to remember that HCl is a very strong acid, which means that in solution will get to very acid solutions (very low pH values) which leaves only B as possible answer

Answer: The mass

Explanation: ability to rust, flammability, and ability to combust are chemical properties.

the hybridization of the nitrogen atom in NH2 is sp2.

The hybridization of the nitrogen atom in the cation NH2 can be explained by considering the valence electrons of nitrogen. Nitrogen has five valence electrons, and in NH2, one of these electrons is used to form a bond with the hydrogen atom, leaving four electrons.

To determine the hybridization of the nitrogen atom in the NH2+ cation, follow these steps:

1. Identify the nitrogen atom's valence electrons. Nitrogen has 5 valence electrons.
2. Add the number of hydrogen atoms bonded to nitrogen (2 in this case).
3. Add any extra electrons due to the charge. Since it's a positive cation (NH2+), we need to subtract one electron.

Now, the total number of electrons in the valence shell is 5 (from nitrogen) + 2 (from the hydrogens) - 1 (from the positive charge) = 6 electrons.

4. Divide the total number of electrons by 2 to get the electron pairs: 6 electrons ÷ 2 = 3 electron pairs.

5. Determine the hybridization based on the number of electron pairs. In this case, there are 3 electron pairs:

- 2 pairs are used for bonding with the hydrogen atoms.
- 1 pair is a lone pair on the nitrogen atom.

The hybridization that corresponds to 3 electron pairs is sp2. Therefore, the hybridization of the nitrogen atom in the NH2+ cation is sp2.

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Answer:

The magnesium atom is larger.

Explanation:

The magnesium atom is larger because it is on the left side of the Periodic Table (period 3 and group 2) where the atomic radius is larger.

Atomic radius is the distance from the center of the nucleus of an atom to the most external electron shell.

The greater the columbic attractions, the closer the protons in the nucleus are to the electrons in the outer layers, making the size of the atom smaller.

0.54g is the mass of carbon in  0.045 moles of carbon. Elementary particles shared the same quantity of matter.

A body's mass is an inherent attribute. Until the discoveries of the atom as well as particle physics, it was thought to be tied to the amount of matter inside a physical body. It was discovered that various atoms and elementary particles shared the same quantity of matter.

mole = given mass/ molar mass

substituting all the given values in the above equation, we get

0.045 moles = mass/ 12

mass =0.045×12= 0.54g

Therefore, 0.54g is the mass of carbon in  0.045 moles of carbon.

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Answer:

32.065

Hope this helps

The Haber process is a complex industrial process, and several factors must be taken into consideration when determining the optimum temperature.

What is Harber process?

Ammonia (NH3) is created chemically by the Haber process from nitrogen gas (N2) and hydrogen gas (H2). The technique was created in the early 20th century by a German chemist by the name of Fritz Haber, hence the name.

With the aid of a catalyst, usually iron, the Haber process involves the reaction of nitrogen gas and hydrogen gas at high pressure and high temperature. The reaction's chemical equation is as follows:

                   N2 + 3H2 ⇌ 2NH3

In the Haber process, the creation of ammonia (NH3) is an exothermic reaction. Le Chatelier's principle states that an exothermic reaction is more advantageous at lower temperatures. In order to maximise the ammonia yield, one might therefore infer that the Haber process should be carried out at low temperatures.

But because the Haber process is a sophisticated industrial procedure, choosing the ideal temperature requires careful thought of a number of variables. While a low temperature may promote the forward reaction, it may also cause the reaction to proceed more slowly, resulting in less ammonia being produced. The pressure and concentration of the reactants also have an impact on reaction rate.

The Haber process has been successfully used at temperatures between 400 and 450°C, based on the catalyst employed. Due to the low temperature favouring the forward reaction, the reaction rate is high enough at this temperature to achieve an acceptable ammonia production rate while also allowing for a good yield of ammonia. Moreover, the inclusion of a catalyst (often iron) can speed up the reaction even more and boost ammonia output.

In conclusion, even if the forward reaction in the Haber process may be favoured by a low temperature, this does not mean that this temperature is the best one because other variables that affect the reaction rate and production rate may also be at play. By testing, it has been discovered that a catalyst and a temperature of roughly 400–450°C offer the greatest ammonia yield and reaction rate balance.

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1.  the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.  the final concentration of KOH after adding 550 mL of water to 125 mL of 3.01 M KOH solution is approximately 0.557 M.

1.) If 125 mL of water is added to 45.3 mL of a 0.71 M NaOH solution, the resulting solution will be a diluted NaOH solution. The addition of water will increase the total volume while reducing the concentration of NaOH. To determine the final concentration of NaOH, we need to consider the conservation of moles.

First, let's calculate the moles of NaOH in the initial solution:

moles of NaOH = volume (in L) × concentration (in M)

moles of NaOH = 0.0453 L × 0.71 M = 0.0321433 moles

After adding 125 mL (0.125 L) of water, the total volume of the solution becomes 0.0453 L + 0.125 L = 0.1703 L.

To find the final concentration, we divide the moles of NaOH by the total volume:

final concentration of NaOH = moles of NaOH / total volume

final concentration of NaOH = 0.0321433 moles / 0.1703 L ≈ 0.189 M

Therefore, the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.) If 550 mL of water is added to 125 mL of a 3.01 M KOH solution, the resulting solution will also be a diluted solution. Again, we will apply the conservation of moles to determine the final concentration of KOH.

First, calculate the moles of KOH in the initial solution:

moles of KOH = volume (in L) × concentration (in M)

moles of KOH = 0.125 L × 3.01 M = 0.37625 moles

After adding 550 mL (0.55 L) of water, the total volume of the solution becomes 0.125 L + 0.55 L = 0.675 L.

To find the final concentration, divide the moles of KOH by the total volume:

final concentration of KOH = moles of KOH / total volume

final concentration of KOH = 0.37625 moles / 0.675 L ≈ 0.557 M

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A solution of 18.8 g of ammonia (nh3), 129.2 g water, which has a volume of 156 ml ha s weight percent  12.76%, mole fraction 0.131, and molarity  7.05 mol/L.

First, we'll calculate the number of moles of ammonia (NH3) in the solution:

moles of NH3 = mass of NH3 / molecular mass of NH3

moles of NH3 = 18.8 g / 17.03 g/mol = 1.10 mol

Next, we'll find the weight percent of NH3 in the solution:

weight percent of NH3 = (mass of NH3 / total mass of solution) x 100

total mass of solution = mass of NH3 + mass of water

total mass of solution = 18.8 g + 129.2 g = 148.0 g

weight percent of NH3 = (18.8 g / 148.0 g) x 100 = 12.76%

Next, we'll find the molality of NH3 in the solution:

molality = moles of solute / mass of solvent (in kilograms)

mass of solvent (water) = 129.2 g

mass of solvent in kilograms = 129.2 g / 1000 g/kg = 0.1292 kg

molality = 1.10 mol / 0.1292 kg = 8.51 mol/kg

Next, we'll find the mole fraction of NH3 in the solution:

mole fraction of NH3 = moles of NH3 / (moles of NH3 + moles of water)

moles of water = 129.2 g / 18.015 g/mol = 7.16 mol

mole fraction of NH3 = 1.10 mol / (1.10 mol + 7.16 mol) = 0.131

Finally, we'll find the molarity of NH3 in the solution:

molarity = moles of solute / volume of solution (in liters)

volume of solution = 156 ml

volume of solution in liters = 156 ml / 1000 ml/L = 0.156 L

molarity = 1.10 mol / 0.156 L = 7.05 mol/L

So, the weight percent of NH3 in the solution is 12.76%, the molality of NH3 is 8.51 mol/kg, the mole fraction of NH3 is 0.131, and the molarity of NH3 is 7.05 mol/L.

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Answer:g

Explanation:

g

The compound Ammonium Phosphate is (NH4)3PO4 while that of sodium acetate is NaC2H3O2.

An ionic compound is  compound that is composed of ions. We know that a poly atomic ion is an ion that contains more than one atom.

Looking at the options that have been provided, we know that the correct formula for the compound Ammonium Phosphate is (NH4)3PO4 while that of sodium acetate is NaC2H3O2.

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To determine when an acid-base reaction is complete when the concentration of one of the reactants is unknown is by Titration.

The use of indicators is typically the earliest method by which individuals become aware of acid-base titrations. Simply put, indicators are substances that alter color in response to pH. They are typically weak acids with a color difference between the conjugate base and molecular acid. A pH meter and a graph of the pH against the volume of the titrant administered can both be used in acid-base titrations. The equivalency point is where the graph begins to increase sharply. We can tell by looking at the reaction. If it stops bubbling or steaming it is finished.

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Explanation :

Compound B will have the higher viscosity because in terms of size, it has more surface area, and in terms of length, it is longer, which allows for greater interactions between molecules.

Viscosity:

Viscosity is a physical parameter that measures the resistance of a fluid to flow or deformation. It can also be defined as the thickness of a fluid or the rate at which it flows through a pipe, tube, or other container.

Viscosity is influenced by the size, shape, and arrangement of molecules in a fluid.

When the fluid has a greater surface area and a longer length, it has greater interactions between molecules, leading to a higher viscosity.

Hence, compound B will have the higher viscosity because, in terms of size, it has a larger surface area, and in terms of length, it is longer, which allows for greater interactions between molecules.

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Answer: stars vary in their effective temperature and colour. A hot star radiates more energy per second per metre surface area than a cooler star. Does this then mean that a hot star is going to appear brighter to us than a cooler one? The answer to this actually depends on a few factors

Explanation: pa brainiest po