Magnesium has an atomic mass of 24.3. there are two isotopes of magnesium - one contains 12 neutrons and the other contains 13 neutrons in the nucleus. what is the fractional abundance of the one that contains 12 neutrons?

Explanation:

Atomic number of sodium is 11 and its electronic distribution is 2, 8, 1. Whereas atomic number of chlorine is 17 and its electronic distribution is 2, 8, 7.

As we known that in order to attain stability each element must have 8 electrons in its outer orbital. Therefore, in order to attain stability sodium will lose one electron and chlorine will tend to gain one electron.

As a result, an ionic bond will be formed between sodium and chlorine and hence, NaCl is formed.

Thus, we can conclude that sodium, which has an atomic number of 11, will react with chlorine, which has an atomic number of 17. when these two atoms react, both become stable. to become stable, sodium will lose, while chlorine will gain an electron.

Final answer:

The periodic table uses atomic number as the key property to organize elements, arranged in order of increasing atomic numbers and grouping elements with similar properties.

Explanation:

The property used to organize elements on the periodic table is their atomic number, which reflects the number of protons in an atom's nucleus. Dmitri Mendeleev initially created the periodic table, which was later redefined to use atomic number rather than atomic mass. The table arranges elements in rows (periods) and columns (groups), based on increasing atomic numbers and recurring chemical properties. Elements within the same group share similar properties and the table often includes each element's atomic number, chemical symbol, average atomic mass, and sometimes its name.

Furthermore, the periodic table also reflects patterns in electronic configurations that lead to the periodicity of properties, like ionization energy and electron affinity, which influence the physical and chemical behavior of the elements.

The molar mass of C4H10 is 58.14 g/mol. There are approximately 9.54 × 10^22 molecules of C4H10 in 9.213 g of the compound, amounting to roughly 9.54 × 10^23 hydrogen atoms.

Calculating Molar Mass and Number of Atoms

To find the molar mass of C4H10, we add the atomic masses of carbon (C) and hydrogen (H). Carbon has an atomic mass of approximately 12.01 g/mol, and hydrogen has an atomic mass of about 1.008 g/mol. Since the compound has four carbon atoms and ten hydrogen atoms, the calculation would be: (4 × 12.01) + (10 × 1.008) = 58.14 g/mol. Therefore, the molar mass of C4H10 is 58.14 g/mol.

To determine how many C4H10 molecules are contained in 9.213 g of this compound, we use the formula:

For C4H10 this gives us: Number of moles = 9.213 g ÷ 58.14 g/mol which equals approximately 0.1584 moles.

To convert moles to molecules, we use Avogadro's number (6.022 × 1023 molecules/mol):

So in this case: Molecules = 0.1584 mol × 6.022 × 1023 ≈ 9.54 × 1022 molecules of C4H10.

To find the number of hydrogen atoms, we multiply the number of C4H10 molecules by the number of hydrogen atoms per molecule:

This results in: Hydrogen atoms = 9.54 × 1022 × 10 ≈ 9.54 × 1023 hydrogen atoms.

Final answer:

Assuming a 1:1 molar ratio, the number of moles of sodium iodide needed to remove [tex]5.95\times10^-^6[/tex] mol of ozone is also [tex]5.95\times10^-^6 mol[/tex].

Explanation:

To calculate the number of moles of sodium iodide (NaI) required to remove a certain number of moles of ozone [tex](O_3)[/tex], we need to know the stoichiometry of the reaction between NaI and [tex]O_3[/tex]. This information is not provided, so we'll have to assume it is a 1:1 molar ratio, which is typical for direct redox reactions where one molecule reacts with another one-on-one.

Under the assumption of a 1:1 molar ratio, to remove [tex]5.95\times10^-^6 mol[/tex] of [tex]O_3[/tex], you would need an equal amount of NaI, which would also be [tex]5.95\times10^-^6 mol[/tex] of NaI. We are assuming a straightforward reaction where one mole of [tex]O_3[/tex] reacts with one mole of NaI to form products.

Answer:

B horizon

Explanation:

This horizon is considered a region of subsoil!

Go catch your dreams! Have an awesome day! Life is short so live how you wanna.

Valence electrons are electrons in the outermost orbit

Electrolytes are those which dissociates in solution and produces ions.

Ions can carry current,so Electrolytes conduct electiricity.

And non electrolytes are those which do not dissociate in solution and doesnt produce ions.

Since non electrolytes do not produce ions they cannot conduct electricity.

Hence the right option is:

B) Non-electrolytes dissolve and do not dissociate in water providing no charged ions to conduct electricity.  

Answer: Option (D) is the correct answer.

Explanation:

When a chemical compound dissociates into ions in a solution then the resulting solution is known as electrolyte.

For example, HCl dissolved in water will act as an electrolyte.

And, when a chemical compound does not dissociate into ions when dissolved in a solvent then the resulting solution is known as a non-electrolyte.

For example, [tex]CCl_{4}[/tex] in water will act as a non-electrolyte.

As a non-electrolyte does not contains ions therefore, they do not conduct electricity. Also, covalent compounds do not dissociate into ions when dissolved in water.

Thus, we can conclude that the statement non-electrolytes do not dissolve in water and can not conduct electricity, is true.

The energy of the electrons in an atom is said to be quantized, meaning electrons can only have certain specific energy levels. These levels are characterized by quantum numbers, like the principal quantum number 'n', indicating different shells or orbits for the electrons.

Electrons in an atom may only have certain energy levels. This is because the energy of the electrons in an atom is said to be quantized. This means that the electrons can only possess specific amounts of energy, corresponding to distinct energy levels.

Niels Bohr suggested that electrons are restricted to certain orbits, and therefore, they can only have certain energy levels. Each energy level is described by quantum numbers, which are integer values that characterize the arrangement of electrons within an atom. For example, the principal quantum number, represented as 'n,' indicates different energy shells or levels, with higher 'n' values generally signifying higher energies.

Electrons are organized into energy shells labeled by the principal quantum number 'n', where the higher the energy of a shell, the farther (on average) it is from the nucleus. Each shell can contain a set number of electrons and the higher the shell number, which correspondingly indicates a higher energy level.

Answer: [tex]Na_3PO_4[/tex].

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

Here sodium is having an oxidation state of +1 called as [tex]Na^+[/tex] cation and phosphate [tex]PO_4^{3-}[/tex] is a polyatomic anion with oxidation state of -3. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]Na_3PO_4[/tex].

The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.

In this response, it is explained how to calculate the mass of the iceberg and the heat required to melt it based on its volume and the density of ice.

(a) Mass of the iceberg:

To find the mass, we need to convert the volume from cubic feet to cubic meters (1 ft³ = 0.02832 m³). Then, mass = density x volume. So, mass = 917 kg/m³ x (9470 ft³ x 0.02832 m³/ft³).

(b) Heat to melt iceberg:

The heat needed to melt the iceberg is equal to the heat of fusion of ice (334 kJ/kg) x mass of iceberg in kilograms.

Science is where you do experiments to find out the answer to your hypthisis and she if it is correct or not. You also do a lot of research in science to find out a new hypthosis

Answer:

Since the electronegativity difference between the atoms is greater in  SiCl4 , it has bonds that are more polar when compound to the other compound.

Explanation:

Plants get the energy to make organic molecules primarily from light and water through photosynthesis.

Plants get the energy to make organic molecules primarily from light and water through a process called photosynthesis.

In photosynthesis, plants use chlorophyll to capture light energy from the sun. This energy is then used to convert carbon dioxide and water into glucose, the main organic molecule in plants.

In addition to light and water, plants also require minerals and vitamins as nutrients to support the synthesis of organic molecules.

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10 moles of hydrogen gas can produce 180.2 grams of water, calculated by using the balanced chemical equation and multiplying the number of moles of water by its molar mass.

The student's question asks how many grams of water can be produced from 10 moles of hydrogen gas. To solve this problem, we must first write out the balanced chemical equation for the reaction between hydrogen and oxygen to form water, which is:

2 H₂(g) + O₂(g) → 2 H₂O(l)

From the equation, it is clear that 2 moles of hydrogen gas react with 1 mole of oxygen to produce 2 moles of water. Therefore, 10 moles of hydrogen gas would theoretically produce 10 moles of water since the ratio is 1:1. Next, we find the molar mass of water, which is 18.02 g/mol. Multiplying the number of moles of water by the molar mass gives us:

10 mol H₂O × 18.02 g/mol H₂O = 180.2 grams H₂O

So, 10 moles of hydrogen gas can produce 180.2 grams of water.

Final answer:

The average atomic mass of bromine, calculated using the masses and relative abundances of its isotopes 79Br and 81Br, is 79.8812 amu. The relative abundances of these isotopes are 50.69% and 49.31%, respectively.

Explanation:

The question involves calculating the average atomic mass of bromine based on the given experimental results and determining the relative abundance of its isotopes. To calculate the average atomic mass of bromine, we use the formula: (mass of isotope × relative abundance) + (mass of isotope × relative abundance). According to the provided data, bromine has two isotopes, 79Br and 81Br, with masses of 78.9183 amu and 80.9163 amu, respectively, and abundances of 50.69% and 49.31%, respectively.

Calculating the average atomic mass gives: (78.9183 amu × 0.5069) + (80.9163 amu × 0.4931) = 39.9770 amu + 39.9042 amu = 79.8812 amu.

The relative abundance of 79Br and 81Br isotopes is directly provided as 50.69% and 49.31%, revealing how the distribution of these isotopes contributes to the overall atomic mass of bromine in nature.

Hey there Brainly Student! Your answer is 620.000!! I hope this helped!! Your friend, GalaxyGamingKitty

Elements in a group have the same number of valence electrons and the same chemical properties because the valence electrons determine how an element will react with other elements.

The elements in a group have the same number of valence electrons and the same chemical properties. Valence electrons are the electrons in the outermost energy level of an atom, and they determine how an element will react with other elements. The similarity in chemical properties among elements of the same group occurs because they have the same number of valence electrons. For example, all the elements in Group 1 (alkali metals) have one valence electron, and they all react violently with water to form alkaline solutions.

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The complete sentence should be, Elements in a group have the same number of valence electrons and the same chemical properties,