when the halohydrin is treated with nah, a product of molecular formula c4h8o is formed. draw the structure of the product and indicate its stereochemistry.

Answer:

118 elements have been discovered so far

Explanation:

Explanation:

-plants that can absorb copper ions are grown on soil with low grade copper ores.

-the plants are burned and the copper compounds are within the Ash.

-copper ions can be leached from the Ash by adding sulphuric acid, this makes a solution of copper sulphate

-the displacement of scrap iron makes pure copper metals.

Plant Extraction (Plant Mining)

crops are grown in soil containing low-grade ore. Plants take up metal ions from the roots and concentrate these ions on the cells. The plants are harvested and burned. The remaining ash contains metal compounds.

Plants absorb metal ions from their roots in a process called plant mining. It removes toxic metals from contaminated soil-eg around old mines. In the future, when high-grade ore is depleted, it may extract metals by burning plants to produce ash.

How to extract copper from low-grade copper ore? Copper is extracted from low-grade copper ore by hydrometallurgy. Cu is treated with cast iron or H2 and leached by acid.

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According to the information we can infer that these tools are: P.aspersor, Q. sword, M. manual drill, N. blind. According to the above, these tools are used to build and sprinkle crops.

According to the image we can infer that the different tools are:

On the other hand, the functions of these tools are:

The precautions that we must take with these tools (P) are:

Note: This question is incomplete. Here is the complete information:

Attached image

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Answer:

b

Explanation:

Answer:

ita b

Explanation:

trust fam

\(H_3PO_4\) is polyprotic, \(H_2SO_4\) and \(H_2CO_3\) are diprotic, and the rest \(HNO_3\), \(CH_3COOH \) and HCl are monoprotic acids.  

\(H_3PO_4\): This acid is polyprotic, as it has three protons that can be donated.

\(H_2SO_4\): This acid is diprotic, as it has two protons that can be donated.

\(HNO_3\): This acid is monoprotic, as it has only one proton that can be donated.

\(CH_3COOH \): This acid is monoprotic, as it has only one proton that can be donated.

HCI: This acid is monoprotic, as it has only one proton that can be donated.

\(H_2CO_3\): This acid is diprotic, as it has two protons that can be donated.

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Answer:

C2H4CL2

Explanation:

this is your answer

Answer:

Zinc:

Gold:

Therefore, 10 g of zinc contains 0.153 moles of zinc, and 10 g of gold contains 0.051 moles of gold.

Using the molar masses of zinc and gold, 10 grams of zinc corresponds to approximately 0.1527 moles of zinc, while 10 grams of gold corresponds to approximately 0.0508 moles of gold.

We know that:

Moles = Mass (in grams) / Molar Mass

Moles of zinc = 10 g / 65.38 g/mol

Moles of zinc = 0.1527 mol

Now,

Moles of gold = 10 g / 196.97 g/mol

Moles of gold = 0.0508 mol

Thus, it can be concluded that 10 grams of zinc corresponds to 0.1527 moles of zinc, while 10 grams of gold corresponds to 0.0508 moles of gold.

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a. 2 M

b. 1.5 M

Given

a 4 moles in 2 dm of solution?

b 0.3 moles in 200 cm3 of solution

Required

The concentration of a solution

Solution

Molarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution

Can be formulated :

\(\large \boxed {\bold {M ~ = ~ \dfrac {n} {V}}}\)

a.

moles(n) = 4

volume(V)=2 L solution

M = 4 : 2 = 2

b.

moles(n)=0.3

volume(V)=200 cm3 = 0.2 L

M = 0.3 : 0.2 = 1.5

Answer:

116g/mol

Explanation:

Mg=24

NO2=46

multiple 46 by 2and then add 24

The molar mass of  Mg(NO₂)₂ is  116.33 g/mol.

To calculate the molar mass of Mg(NO2)2, we need to determine the atomic masses of each element in the compound and multiply them by their respective subscripts.

The atomic masses of the elements involved are:

Mg (magnesium) = 24.31 g/mol

N (nitrogen) = 14.01 g/mol

O (oxygen) = 16.00 g/mol

The compound Mg(NO₂)₂ contains one magnesium atom (Mg), two nitrate ions (NO₂), and each nitrate ion contains one nitrogen atom (N) and two oxygen atoms (O).

Molar mass of Mg(NO₂)₂ :

Mg: 1 × 24.31 g/mol = 24.31 g/mol

N: 2 × 14.01 g/mol = 28.02 g/mol

O: 4 × 16.00 g/mol = 64.00 g/mol

Now, add up the individual masses:

24.31 g/mol + 28.02 g/mol + 64.00 g/mol = 116.33 g/mol

Therefore, the molar mass of Mg(NO₂)₂  is 116.33 g/mol.

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Multiplying each subscript in the empirical formula by the scaling factor gives us the molecular formula: C₁₆H₁₄O₄S becomes C₁₅.8H₁₃.9O₃.9S.

A drug is a substance that alters the way a living organism functions. Drugs can be used for medicinal, recreational, or experimental purposes. Medicinal drugs are used to prevent, cure, or treat diseases, disorders, and injuries. Recreational drugs are used for pleasure or to alter one's mental state. Experimental drugs are used in clinical trials or research studies to investigate their effects on the human body.

Here,

To determine the molecular formula of the compound, we can use the percent composition of each element and the molar mass.

First, we can find the mass of each element present in the 100 g sample:

Mass of C: 64.94 g

Mass of H: 4.50 g

Mass of O: 20.36 g

Mass of S: 10.20 g

Next, we can convert each mass to moles using the molar mass:

Moles of C: 64.94 g / 12.01 g/mol = 5.41 mol

Moles of H: 4.50 g / 1.01 g/mol = 4.46 mol

Moles of O: 20.36 g / 16.00 g/mol = 1.27 mol

Moles of S: 10.20 g / 32.06 g/mol = 0.32 mol

We can then divide each mole value by the smallest mole value to get a set of whole-number ratios:

C: 5.41 mol / 0.32 mol = 16.91

H: 4.46 mol / 0.32 mol = 13.94

O: 1.27 mol / 0.32 mol = 3.97

S: 0.32 mol / 0.32 mol = 1

Multiplying each ratio by the smallest whole number that makes all the ratios integers gives us the empirical formula:

C₁₆H₁₄O₄S

To find the molecular formula, we need to know the molar mass of the compound. The molar mass given in the problem is 314.38 g/mol. Dividing the molar mass by the empirical formula mass gives us the scaling factor:

Scaling factor = 314.38 g/mol / 318.34 g/mol = 0.987

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The balanced chemical equation for the reaction between phosphoric acid (H3PO4) and strontium hydroxide (Sr(OH)2) is:

2 H3PO4 + 3 Sr(OH)2 → Sr3(PO4)2 + 6 H2O

To determine the mass of precipitate produced when 25.0 mL of 0.750 M strontium hydroxide reacts with 45.0 mL of 0.500 M phosphoric acid, we need to determine which reactant is limiting and use stoichiometry to find the amount of product produced.

First, we can calculate the moles of each reactant:

moles of Sr(OH)2 = (0.750 mol/L) x (0.0250 L) = 0.0188 mol

moles of H3PO4 = (0.500 mol/L) x (0.0450 L) = 0.0225 mol

Since there are more moles of H3PO4 than Sr(OH)2, Sr(OH)2 is the limiting reactant. Using the balanced chemical equation, we can calculate the moles of Sr3(PO4)2 produced:

moles of Sr3(PO4)2 = (0.0188 mol Sr(OH)2) x (1 mol Sr3(PO4)2 / 3 mol Sr(OH)2) = 0.00627 mol

Finally, we can use the molar mass of Sr3(PO4)2 to calculate the mass of precipitate produced:

mass of Sr3(PO4)2 = (0.00627 mol) x (452.12 g/mol) = 2.84 g

Therefore, the mass of precipitate produced is 2.84 g.

To determine the volume of a 1.50 M strontium hydroxide solution required to completely neutralize 50.0 mL of a 0.675 M phosphoric acid solution, we can use stoichiometry and the balanced chemical equation:

2 H3PO4 + 3 Sr(OH)2 → Sr3(PO4)2 + 6 H2O

From the equation, we can see that 2 moles of H3PO4 react with 3 moles of Sr(OH)2, so the mole ratio of H3PO4 to Sr(OH)2 is 2:3.

First, we can calculate the moles of H3PO4 in 50.0 mL of 0.675 M solution:

moles of H3PO4 = (0.675 mol/L) x (0.0500 L) = 0.0338 mol

Using the mole ratio, we can calculate the moles of Sr(OH)2 required to react with all of the H3PO4:

moles of Sr(OH)2 = (0.0338 mol H3PO4) x (3 mol Sr(OH)2 / 2 mol H3PO4) = 0.0507 mol

Finally, we can calculate the volume of 1.50 M Sr(OH)2 required to provide this many moles:

volume of Sr(OH)2 = (0.0507 mol) / (1.50 mol/L) = 0.0338 L or 33.8 mL

Therefore, 33.8 mL of 1.50 M Sr(OH)2 solution is required to completely neutralize 50.0 mL of 0.675 M phosphoric acid solution.

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Answer:

Starch is a soft, white, tasteless powder that is insoluble in cold water, alcohol, or other solvents.

glycogen is a substance deposited in bodily tissues as a store of carbohydrates. It is a polysaccharide which forms glucose on hydrolysis.

Cellulose is a molecule, consisting of hundreds and sometimes even thousands of carbon, hydrogen and oxygen atoms.

Answer:

8. 171074.8 mL

9. 3475 mL.

Explanation:

8. Determination of the volume of the diluted solution.

Initial Molarity (M₁) = 14 M

Initial volume (V₁) = 523 mL

Final Molarity (M₂) = 0.0428 M

Final volume (V₂) =?

Using the dilution formula, we can obtain the volume of the diluted solution as follow:

M₁V₁ = M₂V₂

14 × 523 = 0.0428 × V₂

7322 = 0.0428 × V₂

Divide both side by 0.0428

V₂ = 7322 / 0.0428

V₂ = 171074.8 mL

Therefore, the volume of the diluted solution is 171074.8 mL

9. Determination of the volume of water added.

We'll begin by calculating the final volume of the solution. This can be obtained as follow:

Initial Molarity (M₁) = 3.2 M

Initial volume (V₁) = 973 mL

Final Molarity (M₂) = 0.7 M

Final volume (V₂) =?

M₁V₁ = M₂V₂

3.2 × 973 = 0.7 × V₂

3113.6 = 0.7 × V₂

Divide both side by 0.7

V₂ = 3113.6 / 0.7

V₂ = 4448 mL

Thus, the final volume of the solution is 4448 mL

Finally, we shall determine the volume of water added. This can be obtained as follow:

Initial volume (V₁) = 973 mL

Final volume (V₂) = 4448 mL

Volume of water added =?

Volume of water added = V₂ – V₁

Volume of water added = 4448 – 973

Volume of water added = 3475 mL

Answer: The percent by volume of isopropyl alcohol in a solution made by mixing 120 mL of the alcohol with enough water to make 350 mL of solution is 25.5%.

Explanation:

Given: Volume of solute = 120 mL

Volume of solvent = 350 mL

Now, total volume of the solution is as follows.

\(V_{total} = V_{solute} + V_{solvent}\\= 120 mL + 350 mL\\= 470 mL\)

Let us assume that 100 mL of solution is taken and the amount of isopropyl alcohol present in it is as follows.

\(\frac{V_{solute}}{V_{total}} \times 100 mL\\\frac{120 mL}{470} \times 100 mL\\= 25.53 mL\)

Hence, there is 25.53 mL isopropyl alcohol is present in 100 mL of solution. Therefore, %v/v is calculated as follows.

\(Percent (v/v) = \frac{25.53 mL}{100 mL}\\= 25.5%\)

Thus, we can conclude that the percent by volume of isopropyl alcohol in a solution made by mixing 120 mL of the alcohol with enough water to make 350 mL of solution is 25.5%.

The monoprotic acid in the water produces a 1.64 M solution, and the pH of the resulting solution is 2.95. We must determine the Ka of the acid.

So, let's get started. Calculate Ka using the pH value: Ka can be calculated using the given pH value by using the following formula: pH = -log10 [H+], therefore [H+] = 10 -pH.For a monoprotic acid, we can say that the [H+] concentration equals the [A-] concentration. So, at equilibrium: Ka = [H+]^2/[A-]where, [H+] is the concentration of the hydronium ion, and [A-] is the concentration of the acid.

Then, we calculate the Ka for the acid in the solution as follows:[H+] = 10^-2.95 = 6.31 x 10^-3 [M]Hence, we get the Ka of the acid as shown below: Ka = [H+]^2/[A-] = (6.31 x 10^-3)^2/(1.64 - 6.31 x 10^-3)Ka = 2.58 x 10^-4Thus, the Ka for the acid is 2.58 x 10^-4.

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The mixture as per the question is endothermic reaction when the contents of the tube containing the equilibrium mixture turned a lighter color whenever the tube was placed into an ice bath.

Activation energy  can be defined as the minimum energy required by particles at the reactant side for a chemical reaction to occur. According to the reaction conditions, specifically for reversible reactions, reactants can in turn become products and vice versa.

Exothermic reaction can be defined as the process where the heat energy is liberated in the conversion of the reactants to products for the forward reaction. We know that the heat is created in this process a small part of the energy may be initially provided to activate the reactant particles but once the reaction is in ongoing state it produces good amount of heat energy to keep the process in flow.

The reverse reaction, we know that is the endothermic in nature. The heat energy is absorbed in the conversion of the products ( now reactants in the reverse reaction ) to reactants ( now products in the reverse reaction ), as a result of this more amount of  energy has to be initially and continuously supplied for them to overcome the activation energy barrier for the reverse reaction to occur and be sustained.

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It has been observed that the amino acids used, with the exception of N6-trimethyllysine, can be best categorized as neutral and hydrophobic. The term "neutral" refers to those amino acids that have neither acidic nor basic side chains, and thus are not charged.

The term "hydrophobic" refers to amino acids that do not have any charged or polar groups, and thus do not interact well with water molecules. The hydrophobic nature of these amino acids makes them important in protein folding and stability, as they tend to cluster together and form hydrophobic cores within the protein structure.

The neutral nature of these amino acids makes them less reactive than charged or polar amino acids, which makes them less prone to undergo chemical modifications.

The categorization of the amino acids used in this study as neutral and hydrophobic is significant, as it helps us understand the behavior of these amino acids in various biological processes.

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Yes, the sea is considered a buffer.

A buffer is a solution that resists pH changes when acids or bases are added. The buffering capacity of the ocean allows it to maintain a relatively stable pH even when acids and bases are added.

The ocean's buffering capacity is primarily due to the presence of dissolved compounds such as bicarbonate (HCO3-) and carbonate (CO32-). These compounds act as both weak acids and bases, accepting and releasing hydrogen ions (H+) to maintain pH balance. When carbon dioxide (CO2) in the atmosphere dissolves in seawater, carbonic acid (H2CO3) is produced and decomposed into bicarbonate ions and hydrogen ions.

This transformation helps prevent a rapid drop in pH as excess hydrogen ions combine with carbonate ions to form bicarbonate ions, which can reduce overall acidity.

When alkali such as hydroxide ions (OH-) is added to the ocean, excess hydroxide ions combine with hydrogen ions to form water molecules, reducing alkalinity.

The presence of these dissolved compounds and their interconversion reactions stabilize the pH of the ocean, making it less susceptible to rapid changes in acidity or alkalinity. This buffering capacity is essential for the survival and maintenance of marine life, as many organisms are sensitive to changes in pH.

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The molarity of the barium chloride solution is 7.

What is molar mass?

The molar mass is the substance; it helps to determine the mass of the sample substance to the atom of the sample or substance. The molar mass depends on the molecular formula and the isotopes of the atom. Molar mass is used for the inducement of electric charge. Molar mass is the measurement of the volume of the mass. The molar mass is expressed in the unit of dalton.

What is mole ?

A mole is the atom's elementary particle, an ion. The mole of the substance is always related to the Avogadro number. The mole is always associated with the weight or mass of the element or substance. The standard unit of a mole is mol. The mole is a significant factor of the reactant and products to form an equation. A mole calculates the atom, ion, and substance weighs.

Therefore, The molarity of the barium chloride solution is 7.

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Answer: 18

Explanation: thats all

Answer:

Hi! Your answer here is e. 0.018km. The total number of meters Mark ran over the course of three days is 18. The problem asks that we convert this number to kilometers, and 18 meters is equivalent to 0.018 kilometers.

Have a great day! - Mani :)

Answer:

B) weight

Thats it no explanation

Answer:

B) weight

Explanation:

Weight is gravity's pull on an object. This would change if you went to the moon. Gravitational

Mass is the amount of the object. This would stay the same if you went to the moon. Non-gravitational

Doubling the atmospheric CO₂ concentration then C₃ plants has faster growth rate

CO₂ level are usually measured in percent of air or part per million and because of CO₂ the plants can maintain high photosynthetic rates with relatively low stomatal conductance and it has been suggested that increase CO₂ will increase water use efficiency of C₃ species because it caused a reduction in transpiration rate and an increases in CO₂ assimilation rate of the plant and C₃ would have faster growth rate and C₄ would be minimally affected

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It have no definete points, with high kinetic energy ions, and called supercooled liquid.

When the constituent particles of a solid lack a regular three-dimensional configuration, the solid is said to be amorphous.

Crystalline solids are described as having highly organised arrangements of their atoms, ions, and molecules in tiny structures.

Amorphouse solids do not have definite no definite points and do not share the same wanderwal forces, so some of their particles melt faster than the other

Some substances that are normally crystalline may become amorphous if they are bombarding it with high-kinetic-energy ions.

A substance that retains certain liquid characteristics, even at temperatures at which it appears to be a solid is a super cooled liquid.

matches to the respective questions:

cubic= a

tetragonal= e

hexagonal =d

trigonal= f

orthorhombic= g

monoclinic= b

triclinic= c

simple cubic= i

face-centered cubic= h

body-centered cubic= j

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The Lewis structure for CH3NH2 shows a carbon atom bonded to three hydrogen atoms and a nitrogen atom. The structure illustrates the arrangement of atoms and bonds, with the lone pair of electrons on nitrogen not explicitly shown.

Here is the Lewis structure for CH3NH2 (also written as H3CNH2):

    H       H

     |       |

 H - C - N - H

     |

     H

In this Lewis structure, carbon (C) is in the center, surrounded by three hydrogen atoms (H) and one nitrogen atom (N). Each bond is represented by a line, and each atom is depicted with its symbol. The lone pair of electrons on nitrogen is not shown in the structure, but it occupies the remaining electron space around the nitrogen atom.

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According to the reaction, when 355 ml of 1.65 m Hydrochloric acid solution are combined with too much aluminum, 26.03 g of aluminum chloride is created.

An inorganic substance with the formula AlCl3 is aluminum chloride, also referred to as aluminum trichloride. It takes the form of [Al(H2O)6] hexahydrate. Aluminum chloride is ALCl3, which is composed of six water molecules. Aqueous hydrochloric acid, also referred to as muriatic acid, is a type of hydrochloric acid. It is a colourless solution with an overpowering odor. Strong acid is how it is categorized.

2 Al(s) + 6 HCl is the given reaction. ———-> 2 AlCl3 + 3H2

Using the provided data

The amount of HCl in moles is n= Volume * Concentration = 0.58575 mol (1.65 M * 355 ml)/1000 ml

based on the response,

It takes 6 mols of HCl. To neutralize 2 moles of aluminum, 0.58575 mol of hydrochloric acid must be used.

using the cross-multiplication method, 0.19525 moles are obtained by multiplying 0.58575% by 2/ 6.

Weight of the AlCl3 = 0.1952 moles * 133.340538 g/mol = 26.03 g

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Answer:

sugar

Explanation:

because sugar dissolves

in water, while flower    because it is insoluble

Explanation:

Distinguish chemical substances from mixtures

Key Points

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.

A chemical substance is composed of one type of atom or molecule.

A mixture is composed of different types of atoms or molecules that are not chemically bonded.

A heterogeneous mixture is a mixture of two or more chemical substances where the various components can be visually distinguished.

A homogeneous mixture is a type of mixture in which the composition is uniform and every part of the solution has the same properties.

Various separation techniques exist in order to separate matter, including include distillation, filtration, evaporation and chromatography. Matter can be in the same phase or in two different phases for this separation to take place.

Terms

substanceA form of matter that has constant chemical composition and characteristic properties. It is composed of one type of atom or molecule.

elementA chemical substance that is made up of a particular kind of atom and cannot be broken down or transformed by a chemical reaction.

mixtureSomething that consists of diverse, non-bonded elements or molecules.

Answer:

a pure substance made up of only one kind

Explanation:

Answer:

Prophase, metaphase, anaphase, telophase

Explanation:

Electrolysis occur when an electric current is passed through a liquid or solution thereby causing the decomposition of chemicals.

For magnesium chloride, it will be heated to be able to conduct electricity. When molten, the MgCl2 will decomposes into Mg2+ and 2Cl- ions. During electrolysis, the elements are separated according to the equations;

According to the half reactions, the Mg2+ is reduced at the cathode (-) and the Cl- is oxidized at the anode (+). Reduction at the cathode shows that magnesium gains two electrons to form a magnesium solid while the chlorine ion looses two electrons at the anode