how many of the following salts are expected to be insoluble in water sodium sulfate barium nitrate ammonium sulfate potassium phosphate

Mg + CO\(_2\)→ MgO + CO is an oxidation-reduction reaction. Therefore, the correct option is option E among all the given options.

Redox reactions involve oxidation-reduction chemical processes in which the oxidation states of the reactants change. Redox is a shortened version of reduction-oxidation. Two distinct processes—a reduction process or an oxidation process—can be used to describe all redox reactions.

In redox and oxidation-reduction processes, the oxidation or reduction reactions usually take place concurrently. In a chemical reaction, the material that is being reduced is referred to as the reducing agent, and the substance that is being oxidised is the oxidising agent. Mg + CO\(_2\)→ MgO + CO is an oxidation-reduction reaction.

Therefore, the correct option is option E.

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Answer:

its a gas

Explanation:

Hydrogen  is the chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, non-metallic, univalent, highly flammable diatomic gas. Hydrogen is the lightest and most abundant element in the universe.

In the given question, the state of matter of Hydrogen is gas in nature.

A state of matter is one of the four distinct forms in which matter can exist as solid, liquid, gas, and plasma.

Hydrogen is a chemical element that occurs naturally as a gas at standard temperature and pressure (STP). It is the lightest and most abundant element in the universe and is found in stars, gas giants, and other celestial bodies.

It is also used in various industrial processes, such as the production of ammonia and methanol, and as a fuel source in fuel cells.

Therefore, hydrogen is in the gaseous state at room temperature and normal atmospheric pressure.

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Answer:  Blue whales, like humans, obtain molecules from food and air through a process of digestion and respiration. During digestion, molecules in food are broken down and absorbed into the bloodstream, while during respiration, oxygen molecules in the air are absorbed into the bloodstream. Both processes enable blue whales to obtain the necessary molecules for energy, growth, and development.

Answer: The human body readily responds to changing environmental stresses in a variety of biological and cultural ways. We can acclimatize to a wide range of temperature and humidity. ... This ability to rapidly adapt to varying environmental conditions has made it possible for us to survive in most regions of the world.

Explanation:

Answer: you have to talk to someone who wont mind wanting to wanting to like you a lot like that.

Explanation:  I wish I could be able to talk to someone who would want to get to like me like that, so its a very relatable situation.

The pH scale is a cuantitative method to determine the acidity, basicity or neutrality of a solution. It goes from 1 to 14 because of the hydronium (and hydroxyl) ion concentration of the water:

Answer:

First, we need to convert the toxicity value from mg/kg to mg for a 70 kg adult:

Toxic dose for a 70 kg adult = 12,000 mg/kg x 70 kg = 840,000 mg

Next, we need to calculate the number of moles of 7-UP in one can:

Concentration of 7-UP in one can = 0.012 M

Volume of one can = 330 mL = 0.33 L

Number of moles of 7-UP in one can = concentration x volume = 0.012 mol/L x 0.33 L = 0.00396 mol

Finally, we can calculate the number of cans of 7-UP a 70 kg adult would have to drink to reach a toxic dose:

Number of cans of 7-UP = toxic dose / (number of moles in one can x molecular weight of 7-UP)

Molecular weight of 7-UP = 338.14 g/mol

Number of cans of 7-UP = 840,000 mg / (0.00396 mol x 338.14 g/mol) ≈ 619 cans

Therefore, a 70 kg adult would have to drink approximately 619 cans of 7-UP to reach a toxic dose.

Explanation:

Answer:

C- A proton has about the same mass as a neutron .

Explanation:

In an atom such as a carbon atom, the masses of the proton and neutrons are the same.

The mass of the electrons is very negligible.

The mass of protons and neutrons are similar.

The subatomic particles have been electrons, protons, and neutrons. The mass of protons have been equal to the mass of neutrons. Thus option C is correct.

The atoms has been found to be consisted of the positively charged nucleus and the negatively charged electrons. The nucleus has been consisted of the neutrons and protons.

The number of electrons and protons has been equal in an atom. The neutrons number has been varied in the atom. The mass of the electron has been negligible in an atom, and thereby the mass of the atom has been dependent on the mass of the nucleus.

The mass of the neutrons has been almost equal to the mass of protons. Thus option C is correct.

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Answer:

Ionic bond.

Explanation:

Group 7 elements like Bromine (Br) and group 2 elements like Magnesium,(Mg) involved loss and gain of electrons which is typical with Ionic bonding.

Hard water contains higher levels of minerals such as calcium and magnesium, while soft water has low levels of these minerals. While both hard and soft water can be safe for drinking, hard water is generally considered safer due to the minerals it contains.

The minerals in hard water can actually be beneficial to human health, as they are important for strong bones and teeth. In addition, the minerals in hard water can help to balance the body's electrolytes and may have other health benefits.

Soft water, on the other hand, may contain higher levels of sodium or other chemicals used in the softening process. While these levels are generally considered safe, some people with certain health conditions may need to avoid drinking water with higher sodium levels.

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Answer:

The answer is "The film roll number"

Explanation:

Digital photos do not use film.

Answer:

1: false

2: B

Explanation:

I do not know the 3rd one

Answer:

B) pH of water is independent. A) Number of tadpoles is dependent

Explanation:Because the pH can kill fish

Because it only needs to lose one electron in order to create the next valence electron shell, the stable 3s shell.

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Enzymes speed up the process while being unaffected by the one they catalyze. Enzyme properties are being researched.

The vital function of enzymes is to reduce the activation energy of a reaction, or the number of calories necessary for the process to start. In order to facilitate the chemical bond-forming and bond-breaking processes, enzymes bind to reactant components and hold them in place.

As biological catalysts, enzymes quicken the pace of biological reactions. Enzymes change one energy form into a more useful one. Cofactors are elements that help enzymes function. There is a great degree of selectivity in enzymes.

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Answer:

Hello is there a specific aliment you have in mind If so I can explain and tell you the answer.

The answer would be C for the gizmo. The option is Li 8/3.

Answer:

B

Explanation:

Fe3O4(s) + CO(g) →FeO(s) + CO2(g)

Left side

Fe =3

O = 5

C = 1

Right side

Fe =1

O = 3

C = 1

Balance by finding common denominator

We'll make Fe 3 on the left side

Fe3O4(s) + CO(g) →3FeO(s) + CO2(g)

Left side

Fe =3

O = 5

C = 1

Right side

Fe =3

O = 5

C = 1

Hydrophosphoric acid is generally known as phosphine and the formula for hydrophosphoric acid is PH3 P H 3

Hypophosphoric acid is a mineral acid with phosphorus in an oxidation state +4.It has a chemical formula H4P2O6.

Hypophosphorous acid is used as a decolorizing agent and for color stabilization during the manufacture of chemicals and several plastics including: nylon fibers, polyamides, polyester fiber, polyacrilonitrile, alkyd rsins, epoxies, fatty acid esters and glycerols.

Therefore, the formula of hypophosphoric acid is H4P2O6. It contains four P-OH bonds, Two P=O. bonds and one P-P bond.

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It took 14 years between the first man on the Moon and the first US woman in space.

The use of astronomy and space technology to explore outer space is known as space exploration. While astronomers use telescopes to explore space, physical exploration is carried out by both uncrewed robotic space probes and human spaceflight.

Understanding gravity, the magnetosphere, the atmosphere, fluid dynamics, and the geological evolution of other planets, for example, has come from studying the solar system.

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Answer:

I would assume the metal to be Mg magnesium, when magnesium burns it releases a lot of energy in the form of a powerful light

Answer:

Optimization is the process of making a trading system more effective by adjusting the variables used for technical analysis.

The concentration of potassium ions, K⁺ in the solution obtained by mixing 480 mL of 0.410 M KOH with 440 mL of 0.290 M K₂SO₄ is 0.491 M

We'll begin by calculating the number of mole of potassium ion, K⁺ in each solution.

Volume = 480 mL = 480 / 1000 = 0.48 L

Molarity = 0.410 M

Mole = Molarity x Volume

Mole of KOH = 0.410 × 0.48

KOH(aq) —> K⁺(aq) + OH¯(aq)

From the balanced equation above,

1 mole of KOH contains 1 mole of K⁺

Therefore,

0.1968 mole of KOH will also contain 0.1968 mole of K⁺

Thus, 0.1968 mole of K⁺ is present in 480 mL of 0.410 M KOH

Volume = 440 mL = 440 / 1000 = 0.44 L

Molarity = 0.290 M

Mole = Molarity x Volume

Mole of K₂SO₄ = 0.290 × 0.44

K₂SO₄(aq) —> 2K⁺(aq) + SO₄²¯(aq)

From the balanced equation above,

1 mole of K₂SO₄ contains 2 moles of K⁺

Therefore,

0.1276 mole of K₂SO₄ will contain = 0.1276 × 2 = 0.2552 mole of K⁺

Thus, 0.2552 mole of K⁺ is present in 440 mL of 0.290 M K₂SO₄

Mole of K⁺ in KOH = 0.1968 mole

Mole of K⁺ in K₂SO₄ = 0.2552 mole

Total mole = 0.1968 + 0.2552

Volume of KOH = 0.48 L

Volume of K₂SO₄ = 0.44 L

Total volume = 0.48 + 0.44

Total mole = 0.452 mole

Total volume = 0.92 L

Molarity = mole / Volume

Molarity of K⁺ = 0.452 / 0.92

Therefore, the molarity of potassium ion, K⁺ in the resulting solution is 0.491 M

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We can see here that the catalytic cycle for the hydrogenation of alkenes using Wilkinson's catalyst involves several steps.

Here's an overview of the catalytic cycle, including the necessary details:

i. Chemical structure of the catalyst:

Wilkinson's catalyst, also known as chloridotris(triphenylphosphine)rhodium(I), has the following chemical structure: [RhCl(PPh3)3]

ii. Molecular geometry of the catalyst:

The Wilkinson's catalyst has a trigonal bipyramidal geometry around the rhodium center. The three triphenylphosphine (PPh3) ligands occupy equatorial positions, while the chloride (Cl) ligand occupies an axial position.

iii. Type of reactions involved:

The catalytic cycle involves several reactions, including:

iv. Starting material, reagent, and solvent:

The starting material is an alkene, and the reagent is Wilkinson's catalyst ([RhCl(PPh3)3]). The reaction is typically carried out in a suitable solvent, such as dichloromethane (CH2Cl2) or tetrahydrofuran (THF).

v. Major and minor end-products:

The major end-product of the hydrogenation reaction is the fully saturated alkane, resulting from the addition of hydrogen across the double bond. The minor end-product may include cis- or trans-configured alkanes if the original alkene substrate possesses geometric isomers.

vi. Intermediates:

The intermediates in the catalytic cycle include:

These intermediates play a crucial role in facilitating the hydrogenation reaction and enabling the catalytic cycle to proceed.

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Answer:

Na:  1

F:    7

V:    5

Ar:   8

C:    4

Explanation:

The number of valence electrons by using periodic table are Na has 1, F has 7, V has 5, Ar has 8 and C has 4 valence electron.

The chemical elements are arranged in rows and columns in the periodic table, sometimes referred to as the periodic table of the elements. It is frequently used in physics, chemistry, and other sciences, and is frequently regarded as a symbol of chemistry.

Because of the orderly arrangement of the elements, it is known as the periodic table. They're arranged in rows and columns, as you'll see. Periods and groups are the names given to the horizontal rows and the vertical columns, respectively.

A system for arranging the chemical elements is the periodic table. The fundamental components of all matter are the chemical elements. The atomic number is a distinct characteristic of each chemical element. This figure is based on how many protons there are in each of the element's atoms.

Thus, The number of valence electrons by using periodic table are Na has 1, F has 7, V has 5, Ar has 8 and C has 4 valence electron.

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Answer:

the answer is "Transferring of electrons from one atom to another creates the bond"

Explanation:

The statement which is true about covalent bonds is that the valence

electrons are shared in order to achieve the bond.

Covalent bonds involves the atoms of two elements sharing electrons in

order to achieve a stable configuration. The electrons which are shared are

those at the outermost layer of the shell and they are called valence

electrons.

These bonds help in the formation of new compounds such as water which

is formed from the covalent bonding between hydrogen and oxygen.

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The statement that is true regarding valence electrons is that they are the outermost electrons (option C).

Valence electrons in chemistry are any of the electrons in the outermost shell of an atom. They are capable of forming bonds with other atoms.

In chemistry and physics, a valence electron is an electron in the outer shell associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed.

For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons.

Therefore, options A, B and D are incorrect making option C the correct option regarding valence electrons.

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