Na2CO3 + 2 HNO3 --> 2 NaNO3 + CO2 + H2O
​If 7.50 g of Na2CO3 reacts, how many mol of CO2 are produced?

The relationship between electron orbits and light emission Bohr postulate is The energy difference between two electron orbits would equal the energy of an emitted photon.

The path is taken by an electron as it circles an atom's nucleus. An atomic orbital is just a function that describes the position and wave-like behavior of an electron within an atom in terms of both atomic theories as well as quantum mechanics. This function may be utilized to determine the likelihood of discovering any atom's electron in any particular area surrounding the nucleus.

The matter that is stimulated can emit light, and as we will demonstrate, excitation can occur from a wide range of sources.

Matter is composed of atoms and molecules, which emit light normally at specific energies. Either spontaneous or induced light emission is possible.

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The highest energy subshell occupied by a Titanium ion with +2 charge (Ti⁺²) will be 4s.

The element Titanium has an Atomic Number of 22. This means that Titanium has 22 electrons bound by the nucleus, which are assigned to various orbitals. The order of the filling of the orbitals, which is the same for all elements, goes as follows for Titanium.

Ti₂₂ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²

As per the order, the orbitals are written in the order of increasing energy, which can be checked by the (n + l) rule.

In the question, Ti⁺² ion is mentioned, where two electrons have been removed. Since the electrons are always removed from the outermost orbital, the electronic configuration of the ion will be:

Ti⁺² = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁰

As seen, the electrons are removed from the outermost orbital. Thus, after removal, the highest energy orbital would be 4s.

(Image depicting Electronic Configuration for reference)

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Answer:

C.4

Explanation:

The characteristics of nuclear reactions allow to find the answers for the different questions are:

1) The total number of protons

2) The number of protons changes

3) Spontaneous emission of radiation

4) Sew one piece of fabric to another and form a larger one

5) There must be an unstable nucleus form in stable nuclei

6) The nuclei combine in a fusion reaction

7) There are no charged released

Nuclear reactions are the process by which atoms transform into other atoms, we fear two types of reactions:

It is asked to make a selection of which are the correct statements, for the different questions

1) In a nuclear reaction the amount of protons remains invariant, the neutral ones can be released or absorbed

The correct answer:  The total number of protons

2) A particula alpha is a nucleus with 2 protons, two neutrons, so it always changes from one element to another

The correct answer is: The number of protons changes

3) as described radioactive decay.

It is the process by which particles or radiation are emitted from the atomic nucleus

The correct answer is: Spontaneous emission of radiation

4) Fusion is a process by which two nuclei unite and a larger one is formed

The correct answer is: sew one piece of fabric to another and form a larger one

5) What to take into account when creating a disintegration model.

A mechanism must be created that allows the particle emission from the nucleus with the decrease of the total energy of the system

The correct answer is: There must be an unstable nucleus form in stable nuclei

6) Difference between fusion and chemical reaction

In the fusion other atoms are formed, in the chemical reaction the atoms remain unchanged

The correct answer is: The nuclei combine in a fusion reaction

7) How to describe the charged particles in the fusion

in a fusion reaction in general no charged particles are released, so all charged particles (protons are in the new nucleus

there is not image

The correct answer should be: There are no charged released

In conclusion with the characteristics of nuclear reactions lets find the results to the questions are:

1) The total number of protons

2) The number of protons changes

3) Spontaneous emission of radiation

4) Sew one piece of fabric to another and form a larger one

5) There must be an unstable nucleus form in stable nuclei

6) The nuclei combine in a fusion reaction

7) There are no charged released

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The energy associated with the annihilation of a positron and an electron is approximately 2.7416 × 10⁻⁸ kilojoules per mole.

When a positron and an electron annihilate each other, their combined mass is completely converted into energy according to Einstein's mass-energy equivalence principle (E=mc²). To calculate the energy associated with this process in kilojoules per mole (kJ/mol), we need to determine the mass of the positron-electron pair and then apply the appropriate conversion factors.

The mass of an electron is approximately 9.10938356 × 10⁻³¹ kilograms, and since the positron has the same mass, the combined mass of the pair is twice that value. To convert this mass to moles, we need to divide it by Avogadro's number, which is 6.022 × 10²³ particles/mol.

Now, to calculate the energy associated with the annihilation process, we can use the equation E=mc². The mass of the positron-electron pair is multiplied by the square of the speed of light, c, which is approximately 2.998 × 10⁸ meters per second.

Therefore, the energy associated with the annihilation of a positron and an electron can be calculated as follows:

Energy (E) = (2 * mass of electron) * (speed of light)²

Substituting the known values and performing the calculation, we find:

E = (2 * 9.10938356 × 10⁻³¹ kg) * (2.998 × 10⁸ m/s)²

Finally, convert the energy to kilojoules per mole by dividing by Avogadro's number:

Energy (E) = [(2 * 9.10938356 × 10⁻³¹ kg) * (2.998 × 10⁸ m/s)²] / (6.022 × 10²³ particles/mol)

= 2.7416 × 10⁻³⁶ kg m²/s²/particles * mol

To convert this energy to kilojoules per mole, we need to multiply by the conversion factor. The conversion factor is given by 1 J/mol = 1 kg m²/s²/mol. Additionally, 1 kJ = 1000 J.

Energy (E) = (2.7416 × 10⁻³⁶ kg m²/s²/particles * mol) * (1 J/mol / 1 kg m²/s²) * (1 kJ / 1000 J)

= 2.7416 × 10⁻³⁶ * 10⁻³ * 10⁻³ kJ/mol

= 2.7416 × 10⁻⁸ kJ/mol

Therefore, the energy associated with the annihilation of a positron and an electron is approximately 2.7416 × 10⁻⁸ kilojoules per mole.

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10.0 tonnes of TiO₂ can be produced at most from 19.0 tonnes of the mineral ilmenite, FeTiO₃. The first option is correct.

Utilizing the "mole concept," we may determine the mass of chemical substances according to the situation. A mole is a precise unit of measurement for the number of atoms or molecules in a large sample of the substance. It is the amount of a substance that includes precisely the Avogadro number of the substance's "elementary entities". It is practical to express the quantity of a substance using the mole concept.

For the given situation, first, write the complete equation,

\(\mathrm{FeTiO_3\longrightarrow FeO+TiO_2}\)

Then, the mole concept is introduced as,

\(\begin{aligned}\mathrm{\frac{mole\;of\;TiO_2}{mole\;of\;FeTiO_3}}&=\frac{1}{1}\\\mathrm{mole\;of\;TiO_2}&=\mathrm{mole\;of\;FeTiO_3}\\\mathrm{\frac{m_{TiO_2}}{79.9}}&=\frac{19.0}{151.7}\\\mathrm{m_{TiO_2}}&=\frac{79.9\times19.0}{151.7}\\&=\mathrm{10.00\;tonnes}\end{aligned}\)

The required answer is 10.0 tonnes.

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Answer:

Hydrogen (H) “burning” initiates the fusion energy source of stars and leads to the formation of helium (He).

FUSION Reaction

Explanation:

mark me brainliest please.

Answer:

You have 1680 grams of urea. It means (in it) there are 787 grams of nitrogen, 112 grams of hydrogen, 336 grams of carbon, and 448 grams of oxygen.

Explanation:

Answer:

6 dinosaurs

Explanation:

remaining toys the kid will have are 6 stickers and 1 toy soldier.

The correct coefficient for the previous redox reaction  X₁ X Ω· H₂106 + Cr-10 + Cr³+ is 6.

In the given redox reaction, the coefficient in front of Cr³+ is 6. This means that 6 moles of Cr³+ ions are involved in the reaction. The coefficient indicates the relative amount of each species involved in the reaction. In this case, the reaction involves the transfer of electrons between species, with Cr³+ being reduced to Cr²+.

By assigning a coefficient of 6 to Cr³+, it ensures that the number of electrons transferred and balanced on both sides of the reaction equation.

The coefficient of 6 indicates that for every 6 moles of Cr³+ ions participating in the reaction, there must be a corresponding number of moles for the other species involved.

It is important to balance the coefficients in a redox reaction to ensure that the reaction obeys the law of conservation of mass and charge.

The balanced coefficients help in determining the stoichiometry of the reaction, providing a clear understanding of the relative amounts of reactants and products involved.

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7140 ml of the 0.245 M NaOH solution are needed to deliver 1.75 moles of NaOH

To determine how many milliliters (ml) of a 0.245 M NaOH solution are needed to deliver 1.75 moles of NaOH, we can use the equation:

moles = molarity * volume

Rearranging the equation, we have:

volume = moles / molarity

Substituting the given values:

moles = 1.75 mol

molarity = 0.245 M

volume = 1.75 mol / 0.245 M

volume = 7.14 L

However, the given volume is in liters, but we need to convert it to milliliters. Since 1 liter is equal to 1000 milliliters, we can multiply the volume by 1000:

volume = 7.14 L * 1000 ml/L

volume = 7140 ml

Therefore, 7140 ml of the 0.245 M NaOH solution are needed to deliver 1.75 moles of NaOH.

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Almost all binary molecular compounds have names which end in the suffix “-ide”. Binary molecular compounds are formed from nonmetallic elements and they are composed of two atoms. The name of a binary molecular compound is based on the number of atoms present in the molecule.

Almost all binary molecular compounds have names which end in the suffix “-ide”. Binary molecular compounds are formed from nonmetallic elements and they are composed of two atoms. The name of a binary molecular compound is based on the number of atoms present in the molecule. The first element's name remains the same, while the second element's name changes its ending to "-ide".

For example:• CO is carbon monoxide• NO is nitrogen monoxide• ClF3 is chlorine trifluoride• SO2 is sulfur dioxide

The name of the first element appears first in the name of the compound, and the second element's name appears second in the name. In some cases, prefixes are used to indicate the number of atoms present in each element.

For example:• CO2 is carbon dioxide• N2O is dinitrogen monoxide

Molecular compounds are composed of two or more atoms that are joined together. The atoms in a molecular compound are held together by covalent bonds. In contrast to ionic compounds, molecular compounds are usually composed of two or more nonmetals.

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Answer:

d

Explanation:

Answer:

I believe it's either D or A I did it in my math

Answer:

"it can help us explain the universe" or "it can help us study how cells in the body function"

Explanation:

you choose which one you want but their still both technicly right

Answer: (ii) measuring cylinder / pipette / burette

Explanation:

Answer:

There is ionic bonding between Mg2+ ions and NO3− ions. Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid? Both elements in the compound are metals.

Answer:

The answer is D.

Explanation:

A: not correct: one element is a metal and the other is a non-metal.

B: not correct: Fr could be combined with Cl

C: not correct: They are transferred not shared.

D: correct: Non-metals have a higher electronegativity in comparison to the metals with a low electronegativity which results in a great change in electronegativity.

The theoretical yield of t-pentyl chloride is calculated to be 4.90 g

As the volume of t-pentyl alcohol is 5 ml and the standard density of t-pentyl alcohol is 0.805 g/ml, the mass can be calculated as follows;

density = mass ÷ volume

mass = volume × density

mass = 5 mL × 0.805 g/mL

mass = 4.03 g

The volume of HCl used is 12 mL,

Since 1 mole of t-pentyl alcohol yields t-pentyl chloride, therefore, 88.15 g of t-pentyl alcohol reacts with concentrated HCl to yield 106.59 g pf t-pentyl chloride.

(106.59 × 4.03) ÷ 88.15 = 4.90 g

Hence, the theoretical yield of t-pentyl chloride is 4.90 g

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Answer:

carbon-12 is not radioactive

Explanation:

The measurement of the age of dead carbon based life forms requires the use of a radioactive isotope hence it is often referred to as radiocarbon dating.

Carbon-12 and Carbon-14 occur together in living things.The half life of Carbon-14 is about 5670 years.

Hence, since Carbon-12 is not radioactive, it can not be used to measure the age of dead carbon based materials.

In ferromagnetic materials, smaller groups of atoms band together into areas called domains, in which all the electrons have the same magnetic orientation. That's why you can magnetize them.

A portion of a ferromagnetic material where the magnetic moments are aligned with one another because of interactions between molecules or atoms.

In ferromagnetic materials, the atoms form structures called domains.

A domain is a region inside of a material where groups of magnetic moments naturally align in the same direction.

There can be numerous domains within an object.

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Answer:

6 valence electrons

Explanation:

Answer:

a

Explanation:

Jaleh's velocity for the entire trip is 0.4 m/s as It takes her 500 seconds to make the round trip. Path 1 = 400 m В B. A Path 2 = 200 m Path 3 = 300 m. Thus, option C is correct.

A particle's settling velocity known as the rate at which is travels through a still fluid. The specific gravity of the particles, their size, and their shape all have an impact on settling velocity.

A particle in still air will gravitationally settle and reach its terminal velocity fairly quickly. A particle's terminal velocity in a still fluid is referred to as the settling velocity (also known as the "sedimentation velocity").

Understanding variations in the hydraulic regime and interactions between sediment and fluid in the surf zone depends heavily on the particle settling velocity at the foreshore region. In contrast to sedimentation, which is the end product of the settling process, settling is the movement of suspended particles through the liquid.

Therefore, Thus, option C is correct.

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1. The equation is 2KCl + F2 → 2KF + Cl2

2. The moles is 0.4 moles

3. The mole ratio is 2:1

4. 0.2 moles of chlorine is produced

5. The volume of the chlorine gas is 4.48 L

We have that the reaction equation is;

The balanced reaction equation is;

2KCl + F2 → 2KF + Cl2

The moles of the KCl = 30 g/75 g/mol

= 0.4 moles

If 2 moles of KCl produced 1 mole of chlorine

0.4 moles of KCl will produce 0.4 * 1/2

= 0.2 moles

If 1 mole occupies 22.4 L

0.2 moles occupies 0.2 * 22.4/1

= 4.48 L

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2. The [OH¯] in the solution containing [H₃O⁺] = 5.70×10¯¹⁹ M is 1.75×10⁴ M

3. The [H₃O⁺] of a solution containing [OH¯] = 1×10¯⁵ M is 1×10¯⁹ M

This is simply a measure of the acidity / alkalinity of a solution.

The pH measures the hydrogen ion, H⁺ concentration while the pOH measures the hydroxide ion, OH¯ concentration

[H₃O⁺] × [OH¯] = 10¯¹⁴

From the question given above, the following data were obtained:

[H₃O⁺] × [OH¯] = 10¯¹⁴

Divide both sides by [H₃O⁺]

[OH¯] = 10¯¹⁴ / [H₃O⁺]

[OH¯] = 10¯¹⁴ / 5.70×10¯¹⁹

[OH¯] = 1.75×10⁴ M

[H₃O⁺] × [OH¯] = 10¯¹⁴

Divide both sides by [OH¯]

[H₃O⁺] = 10¯¹⁴ / [OH¯]

[H₃O⁺] = 10¯¹⁴ / 1×10¯⁵

[H₃O⁺] = 1×10¯⁹ M

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Answer:

sound waves, light waves, radio waves, microwaves and others

Explanation:

these waves have the same fundamental properties of reflection ,refraction, diffraction and interference, and all waves have a wavelength, frequency, speed and amplitude

Explanation:

Transmutation, conversion of one chemical element into another. A transmutation entails a change in the structure of atomic nuclei and hence may be induced by a nuclear reaction (q.v.), such as neutron capture, or occur spontaneously by radioactive decay, such as alpha decay and beta decay (qq. v.).

Answer:

the answer to your question is A

Answer:

particle size

Explanation:

because except that all are the examples that the speed of dissolving can be changed

Answer:

Adding water

Explanation:

When a solid is dissolving the speed cannot be changed by adding water