How many L in 1. 98m solution using 4. 2mol

The formation of solid magnesium chloride (MgCl₂) by the reaction between chlorine gas (Cl₂) and magnesium metal (Mg) at high temperatures is classified as a synthesis reaction or a combination reaction.

Synthesis reactions involve the combination of two or more substances to form a single product. In this case, chlorine gas and magnesium metal combine to produce magnesium chloride as the sole product.

The balanced chemical equation for this synthesis reaction is:

Mg + Cl₂ ⇒ MgCl₂

Hence, the reaction between chlorine gas and magnesium metal to form solid magnesium chloride indicates a synthesis reaction, as the elements combine to form a compound.

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The number of the moles of lithium are needed to completely react with 4.6 mol Br₂ is 9.2 mol.

The balanced chemical reaction is :

2Li  +  Br₂   ---->  2LiBr

The number of the moles of the = 4.6 mol

It is clear from the above balanced chemical equation that :

1 mole of the Br₂ react with the 2 mole of the Li

The moles of the Li = 2 × 4.6 moles of Li

The moles of the Li = 9.2 mol of the Li

The number of the moles = mass / molar mass

Thus, the number of the moles of the Li is 9.2 mol.

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To make slime without an activator or baking soda, combine 1 cup of glue with 1 tablespoon of liquid dish soap, add optional food coloring, mix until a less sticky consistency is achieved, and knead it with your hands for smoothness.

To make slime without an activator or baking soda, you can create a simple recipe using glue and liquid dish soap.

By combining 1 cup of glue with 1 tablespoon of liquid dish soap and adding optional food coloring for color, you can mix the ingredients until they are well combined.

With continued mixing, the mixture will transform into a slime-like consistency. To improve the texture, knead the slime with your hands. If it's too sticky, you can add a small amount of lotion or baby oil.

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Answer:2

Explanation:

The number of valence electrons for a helium atom is 2. This can be confirmed by looking at the electronic configuration.

Helium is placed in the noble gas series as it has certain properties of it. The atomic number of helium is 2. Thus, it has two electrons in its outermost shell but it has completely filled orbital.

Electronic configuration of He = 1s2

Thus, for drawing the electron dot structure, there are two valence electrons.

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Answer:

oxidized

Explanation:

The oxidation number of an uncombined element is 0, so the oxidation of aluminum in the reactants is 0.

The oxidation number of aluminum in aluminum oxide is +3.

This means the oxidation number of aluminum is increasing, and thus electrons are lost. This means that aluminum is being oxidized.

Due to the absence of polar functional groups and the inability to hydrogen bind with water molecules, nonpolar substances cannot dissolve in water.

Water is a polar solvent because it has a positive charge (hydrogen) on one end and a negative charge (oxygen) on the other (oxygen). Water's polarity makes it possible for it to establish hydrogen bonds with other polar compounds like salts and carbohydrates. Contrarily, nonpolar molecules lack polar functional groups and can't establish hydrogen bonds with water because they can't. As a result, nonpolar substances frequently have a low solubility in water and prefer to dissolve in other nonpolar solvents like benzene or hexane.Because nonpolar chemicals and water do not form hydrogen bonds, there is a strong attraction between the molecules of the nonpolar compound and water, causing the two substances to separate into discrete layers.

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In the Lewis structure of methanol (CH3OH), the OH group is placed on the outside because it is an important functional group that influences the chemical properties and reactivity of the molecule.

The Lewis structure is a representation of a molecule that shows the arrangement of atoms and valence electrons. In methanol, carbon (C) is the central atom bonded to three hydrogen (H) atoms and one oxygen (O) atom. The oxygen atom forms a single bond with carbon and also has two lone pairs of electrons.

The placement of the OH group (hydroxyl group) on the outside of the Lewis structure is significant because it determines the chemical behavior of methanol. The OH group consists of an oxygen atom bonded to a hydrogen atom and represents the presence of an alcohol functional group.

In organic chemistry, functional groups are specific arrangements of atoms within a molecule that give rise to characteristic chemical reactions and properties. The presence and position of functional groups can greatly influence the behavior and reactivity of a compound. In the case of methanol, the hydroxyl group provides the molecule with its characteristic properties.

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Answer:  330.7 jule energy

Answer:

false

Explanation:

...................

its a metal

The approximate pH of a 0.2 M solution of boric acid as an eye wash is around 5.14.


To understand how the pH is calculated for a solution of boric acid, it's helpful to have a basic understanding of acid-base chemistry. When an acid is dissolved in water, it donates a hydrogen ion (H+) to the water molecules, forming hydronium ions (H3O+). The more hydrogen ions present in the solution, the lower the pH (since pH is a measure of the concentration of hydrogen ions).

Boric acid (H3BO3) is a weak acid, which means it only partially dissociates in water. It donates a hydrogen ion to form the conjugate base (H2BO3^-), but some of the molecules remain undissociated. The acid dissociation constant (Ka) is a measure of how much of the acid dissociates, and is calculated by dividing the concentration of the conjugate base by the concentration of the acid.

For boric acid, Ka is 5.8 x 10^-10. This is a very small number, which means the acid is not very strong. To calculate the pH of a 0.2 M solution of boric acid, we use the formula:

pH = (1/2) x (-log(Ka) + log([HA]))

where [HA] is the concentration of the acid (0.2 M). The factor of 1/2 is because boric acid donates two protons (H+) when it dissociates, but the dissociation is incomplete, so we only count half of the protons.

Plugging in the values, we get:

pH = (1/2) x (-log(5.8 x 10^-10) + log(0.2)) = 5.14

So the pH of a 0.2 M solution of boric acid as an eye wash is approximately 5.14. This is slightly acidic, but still within the safe range for eye wash solutions.

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Answer:

Tin and Copper

Explanation:

The two atoms that could potentially form alloys are the tin and copper atoms.

Alloys are mixtures formed between two or more metals.

The goal of forming alloys is to take properties of one metal and add to that of another metal so as to enhance both materials.

Alloys are only formed between metals.

The only metal pair given from the choices is that of tin and copper.

Therefore, the two atoms that could potentially form alloys is tin and copper.

Answer:

True

Explanation:

A and C are the two gases that have the same number of particles.

To calculate the number of molecules of gas using Temperature, Pressure and Volume:

                                  P × V   =   N × k × T   →  1

where,    P   =   pressure of the gas in atm

              V   =   volume of the gas in mL

              N   =   Number of molecules or particles

              k   =   Boltzman constant

              T   =   temperature of the gas in K

        Temperature = 100 K, Pressure = 2 atm and Volume = 400 mL

        Substitute the values in 1,

        ⇒   P × V   =   N × k × T

        ⇒   2 × 400   =   N × 1.38 × \(10^{-23}\) × 100

        ⇒   N   =   2 × 400 / 1.38 × \(10^{-23}\) × 100

        ⇒   N   =   8 / 1.38 × \(10^{23}\)        →   (i)

       Temperature = 200 K, Pressure = 2 atm and Volume = 200 mL

        Substitute the values in 1,

        ⇒   P × V   =   N × k × T

        ⇒   2 × 200   =   N × 1.38 × \(10^{-23}\) × 200

        ⇒   N   =   2 × 200 / 1.38 × \(10^{-23}\) × 200

        ⇒   N   =   2 / 1.38 × \(10^{23}\)        →  (ii)

       Temperature = 100 K, Pressure = 2 atm and Volume = 400 mL

       Substitute the values in 1,

       ⇒   P × V   =   N × k × T

       ⇒   2 × 400   =   N × 1.38 × \(10^{-23}\) × 100

       ⇒   N   =   2 × 400 / 1.38 × \(10^{-23}\) × 100

       ⇒   N   =   8 / 1.38 × \(10^{23}\)        →  (iii)

       Temperature = 200 K, Pressure = 4 atm and Volume = 200 mL

       Substitute the values in 1,

       ⇒   P × V   =   N × k × T

       ⇒   4 × 200   =   N × 1.38 × \(10^{-23}\) × 200

       ⇒   N   =   4 × 200 / 1.38 × \(10^{-23}\) × 200

       ⇒   N   =   4 / 1.38 × \(10^{23}\)       →  (iv)

From (i), (ii), (iii) and (iv), the number of molecules (N) = 8 / 1.38 × \(10^{23}\) is equal for both gas samples A and C.

Therefore, Gas samples A and C have the same total number of molecules or particles.

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The complete question is

The equivalence point in a titration is the point when the moles of the titrant are equal to the moles of the analyte. The endpoint is when the indicator changes color, which is usually close to the equivalence point but not always exactly the same.

In a titration, a solution of a known concentration is slowly added to a solution of an unknown concentration until the chemical reaction between the two is complete. The point at which the reaction is complete is called the equivalence point.

At the equivalence point, the number of moles of the standard solution added to the unknown solution is equal to the number of moles of the analyte (unknown solution) present in the solution. This means that the stoichiometric amount of the standard solution has been added to react completely with the analyte, resulting in the formation of the product.

In some titrations, an indicator is used to signal the equivalence point. An indicator is a substance that undergoes a color change when the pH of the solution changes. The pH of the solution changes when the stoichiometric amount of the standard solution has been added to the analyte, resulting in a change in color of the indicator. This change in color signals the endpoint of the titration.

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Answer:

b. close to 0 degree celsius

Explanation:

100 g * ( x-0)= 500 g * ( 25-x) , where x is the new temperature reached

if we solve for x , we get 20 degree celsius

i.e. the temperature of ice increases to 5 degree celsius and the temperature of water drops to 5 degree celsius

hope it helps.

Answer:

Hydrogen v.s. Oxygen

Explanation:

Hope this helps <3

Answer: B.) Ionic

Explanation: It is B because it is the type of bond that is most likely being presented in row 1.

A covalent bond is most likely being represented in row 1. Hence, option D is correct.

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

The covalent bond is formed by the mutual sharing of valence electrons of one atom with the valence electrons of another atom. The covalent bond formed may be a single bond, a double bond or a triple bond.

If two electrons are shared between two atoms, then the single covalent bond is formed.

If four electrons are shared between two atoms, then a double bond is formed.

If six electrons are shared between two atoms, then a triple bond is formed.

Covalent network compounds are not malleable or ductile as the covalent bonds do not allow the atoms to move.

Hence, option D is correct.

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For a soil that contains 0.5 solids, 0.35 air, and 0.15 water in its volume fraction, the air/soil partition coefficient for benzene and trichloroethylene is 3.33.

Benzene is an organic compound with the molecular structure C6H6. The benzene molecule is made up of six carbon atoms joined to one another in a planar ring and one hydrogen atom coupled to each one. Due to its pure carbon and hydrogen atom composition, benzene is a hydrocarbon. In fluid mechanics and chemistry, the volume fraction is the ratio of a constituent's volume to the sum of all the other constituents' volumes.

0.5/15 = 3.33 is the benzene coefficient.

coefficient for benzene = 0.5/0.15 = 3.33

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Answer:

Asthenosphere

Explanation:

The asthenosphere is the hot, weak, inner part of the upper mantle. Although it is solid, it can flow like a thick, heavy liquid.

0.45moles are in 11 grams of Magnesium. Therefore, the correct option is option C among all the given options.

Magnesium has the chemical symbol Mg and the atomic number 12. It is a gleaming gray metal with a low density, a low melting point, and a strong chemical reactivity. It occurs naturally only in conjunction with other elements, like the other alkali earth metals (group 2 of the periodic table), and it nearly invariably has an oxidation state of +2.

It easily interacts with air to generate a thin magnesium oxide passivation layer that prevents further oxidation of the metal. The free metal emits a dazzling white light when ignited.

mole = given mass/ molar mass

mole = 11 grams / 24=0.45moles

Therefore, the correct option is option C.

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According to Dalton's atomic theory, which was proposed in the early nineteenth century, the atom is the smallest indivisible particle that can engage in a chemical reaction. Atoms of different elements can combine with one another to create chemical compounds, according to this concept. The following chemical reactions are not possible according to Dalton's atomic theory:

Reaction 1: CCL_4 ---> CH_4

This reaction is not possible because, according to Dalton's atomic theory, carbon tetrachloride (CCL4) is made up of one carbon atom and four chlorine atoms. On the other hand, methane (CH4) contains one carbon atom and four hydrogen atoms. As a result, the transformation of carbon tetrachloride to methane is not feasible according to Dalton's atomic theory since it entails the destruction of carbon tetrachloride's composition.

Reaction 2: N_2 + 3H_2 ---> 2NH_3

This reaction is possible because, according to Dalton's atomic theory, nitrogen (N) molecules and hydrogen (H) molecules can combine to form ammonia (NH3). This reaction is feasible since it does not necessitate the destruction of any molecules' composition.

Reaction 3: 2H_2+O_2 ---> 2H_2O+Au

This reaction is not possible since gold (Au) is not present in the equation as a reactant or a product. Dalton's atomic theory does not allow for the generation or destruction of atoms. As a result, this reaction is not feasible according to Dalton's atomic theory.

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Answer:

1972 grams of F₂

Explanation:

Multiply the molar mass of F₂ by the number of moles

Answer:

The answer.

Explanation:

Group 17 consists of Halogens, and group 18 consists of Noble Gases.

Group 17 are very high electronegativities. They have seven valence electrons. They are highly reactive, especially with alkali metals and alkaline earth.  

In group 18 their elements are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.

Nobel gases are placed there because they are extremely unreactive.

Halogen elements are placed there because they have seven valence electrons, they only require one additional electron to form a full octet.

The elements in group 18 are ureactive compared to the elements in group 17.

The elements in group 17 are called the halogens. They are highly reactive nonmetals and hardly occur in free state in nature. They contain seven valence electrons in their outermost shell and are highly electronegative.

The elements in group 18 are unreactive because they have an already filled outermost shell. They are very different from the halogens even though they occur side by side. They occur side by side because they have eight valence electrons and the halogens have seven valence electrons. Recall that elements in the same group have the same number of valence electrons.

They are not Chemically similar at all in any wise. The elements in group 17 and 18 are mostly gases held together by dispersion forces.

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A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

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silver bromide solvency is more , aluminum hydroxide solvency is less, barium sulfite is less , barium sulfite is more  (compared to pure water solution) when put into 0.10 M hydrobromic acid solution.

For silver bromide, the solvency will be more in hydrobromic corrosive arrangement on the grounds that hydrobromic corrosive is serious areas of strength for an and can ionize totally in water, creating more H+ particles, which can respond with AgBr to shape dissolvable HAgBr2 complex particles.

For aluminum hydroxide, the solvency will be less in hydrobromic corrosive arrangement since aluminum hydroxide is amphoteric, meaning it can respond with the two acids and bases. In hydrobromic corrosive arrangement, the H+ particles will respond with the hydroxide particles, causing a change in balance towards the development of water and aluminum bromide. This will diminish the solvency of aluminum hydroxide.

For barium sulfite, the solvency will be less in hydrobromic corrosive arrangement since barium sulfite is insoluble in water and furthermore insoluble in acids. The H+ particles in hydrobromic corrosive arrangement can not separate the strong design of barium sulfite to build its solvency.

For lead chloride, the solvency will be more in hydrobromic corrosive arrangement on the grounds that hydrobromic corrosive can ionize totally in water to create more H+ particles. These H+ particles can respond with the Cl-particles in PbCl2 to frame dissolvable HCl complex particles, subsequently expanding the dissolvability of lead chloride.

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The complete question is:

Each of the insoluble salts below are put into 0.10 M hydrobromic acid solution. Do you expect their solubility to be more, less, or about the same as in a pure water solution?

silver bromide

aluminum hydroxide

barium sulfite

lead chloride

Answer:

remote

Explanation:

i hope it helps

One illustration of receptor-mediated endocytosis seems to be the uptake and cholesterol into cells.

The process of endocytosis involves engulfing a substance or particle by both the cell membrane in order to transport it into the cell. Pinocytosis and macrophages are the terms used to describe these two processes, respectively (cell drinking). As the cytoplasm merges with that as well, a vesicle goes through exocytosis, expelling its constituents from the outside the cell.

Endocytosis is the process whereby the cells take throughout foreign material by encasing it in their membrane. The two primary subtypes of endocytosis are macrophages and pinocytosis. The three primary kinds of endocytosis appear to be responsible for the synthesis, pinocytosis, as well as transcription factor endocytosis.

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The molecules that possess dipole moments are those that have polar bonds and are not symmetrical in shape.

BH3 and CH4 both have nonpolar covalent bonds, so they do not have dipole moments. PCl5 has polar bonds, but it is a symmetrical molecule and the dipole moments cancel each other out, so it does not have a net dipole moment. H2O, HF, and H2 all have polar bonds and are not symmetrical, so they have dipole moments. Therefore, the answer is C) 3.

To determine how many of the following molecules possess dipole moments: BH3, CH4, PCl5, H2O, HF, H2, we will analyze each molecule's structure and polarity.
1. BH3: Boron trifluoride is a symmetrical trigonal planar molecule with no net dipole moment.
2. CH4: Methane is a symmetrical tetrahedral molecule with no net dipole moment.
3. PCl5: Phosphorus pentachloride is a symmetrical trigonal bipyramidal molecule with no net dipole moment.
4. H2O: Water is a bent molecule with two lone pairs on the oxygen atom, creating a net dipole moment.
5. HF: Hydrogen fluoride is a linear molecule with a large electronegativity difference between hydrogen and fluorine, resulting in a net dipole moment.
6. H2: Hydrogen gas is a diatomic molecule with no difference in electronegativity between the hydrogen atoms, so there is no net dipole moment.
Hence, the correct answer is B) 2 molecules (H2O and HF) possess dipole moments.

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Answer:

velocity

Explanation: