We see below that 3-methyl-3-hexanol can be synthesized from the reaction of 2-pentanone with ethylmagnesium bromide. There is a scheme of a chemical reaction, where CH3CCH2CH2CH3, with an O atom double-bonded to the second (from left to right) carbon (2-pentanone) reacts with CH3CH2MgBr (ethylmagnesium bromide). The arrow goes from the single bond between CH3CH2 and MgBr to the second C atom of 2-pentanone. The second arrow goes from the double bond between the second C atom and the O atom of 2-pentanone to the O atom. An intermediate is CH3CCH2CH2CH3, with a CH2CH3 group and an O minus MgBr plus group attached to the second carbon. In the presence of H3O plus the intermediate goes to CH3CCH2CH2CH3, with a CH2CH3 group and an OH group attached to the second carbon (3-methyl-3-hexanol, a tertiary alcohol). What other combinations of ketone and Grignard reagent could be used to prepare the same tertiary alcohol

Answer:

a) polytetrafluorethylene

b) polyethylene terepthalate

c) Nickel

d) Polytetrafluroethylene

e) Aluminum

Explanation:

a) polytetrafluorethylene can be used to make laboratory bottles that can contain nitric acids ( dilute ones ) because of its resistance to either acidic or basic solution

b) polyethylene terepthalate can be used because it is relatively cheaper, also Benzene doesn't exhibit corrosion effect

c) Nickel can be used to produce pipes that transport hot alkaline solutions

d) Polytetrafluroethylene can be used for underground water tanks

e) Aluminum is used because it is light weighted and exhibits corrosion resistivity to climate change

Answer: sand should both heat and cool faster than water

Explanation: water has a higher specific heat capacity than sand- meaning that it takes a lot of heat, or energy, to raise the temperature of water  one degree, whereas it takes comparatively little energy to change the temperature of sand by one degree

Answer:

Explanation:

To find the mass of 1.5*10^24 atoms of sulfur, we can use the formula:

mass = number of atoms x atomic mass

The atomic mass of sulfur is 32.06 g/mol. Therefore, the mass of 1.5*10^24 atoms of sulfur is:

mass = (1.5 x 10^24 atoms) x (32.06 g/mol)

mass = 4.8090 x 10^25 g

Note that this is a very large number, so it can be written in scientific notation as 4.8090 x 10^25 grams.

Work:

mass = (1.5 x 10^24 atoms) x (32.06 g/mol)

mass = 4.8090 x 10^25 g

Cu + O2 --->  CuO2 -The first reaction is a combustion reaction

2 HCl + Mg → H2 + MgCl2- The second reaction is a Single replacement reaction

A combustion reaction is a type of chemical reaction that occurs between a fuel and an oxidizer in the presence of heat or light, resulting in the release of energy in the form of heat and light.

In other words, it is a reaction in which a substance reacts with oxygen to produce heat and light.

Combustion reactions are important in many aspects of daily life, including the burning of fossil fuels for energy production, the combustion of wood or other materials for heating or cooking, and the combustion of fuels in internal combustion engines.

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Answer:

0.65mole of CO₂

Explanation:

Given parameters:

Volume of CO₂ = 14.6L

Unknown:

Number of moles of CO₂ = ?

Solution:

To solve this problem, we must understand that a mole of a gas occupies a volume of 22.4L at STP;

           1 mole of gas occupies  22.4L of volume at STP;

           y mole of CO₂ will occupy 14.6L of volume at STP

                    22.4y  = 14.6

                          y = \(\frac{14.6}{22.4}\)  = 0.65mole of CO₂

Answer:

In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases of that substance coexist in thermodynamic equilibrium. It is that temperatureand pressure at which the sublimation curve, fusion curve and vaporisation curve meet.

Answer:

At the triple point, all three phases (solid, liquid, and gas) are in equilibrium. Since the triple point is a point, there is only one temperature and one pressure where the three phases will exist. This fact often helps in identifying compounds or in problem solving.

Answer:

The density of muffin is 0.2 g/ cm³.

Explanation:

Given data:

Mass of muffin = 100 g

Volume of muffin = 500 cm³

Density of muffin = ?

Solution:

Density is equal to the mass of an object divided by its volume.

Formula:

d = m/v

Now we will put the values in formula.

d = 100 g/ 500 cm³

d = 0.2 g/ cm³

The density of muffin is 0.2 g/ cm³.

Answer:

Half-Life = 18 days

Explanation:

Isotope decay follows the equation:

Ln[A] = -kt + ln[A]₀

Where [A] is amount of isotope after time t,

k is rate constant

[A]₀ is initial amount of isotope.

If we solve rate constant, we can find half-life by using:

Half-life = ln 2 / Rate constant

Replacing in isotope decay equation:

Ln[1/8] = -k*54 days + ln[1]

-2.07944 = -54k

0.0385days⁻¹ = k

Half-Life = ln 2 / 0.0385days⁻¹

The calculated final volume of ethanol in ml present in the bottle is 48.75 ml.

The amount of a substance present in a solution expressed as a percentage of the total volume of the solution is referred to as the percent by volume of the solution. The ratio of a solute's volume to the volume of the solution, multiplied by 100, is the percent by volume. When a solute is dissolved into a solvent, a solution is created. The % by volume calculates the concentration of the solute and solvent by adding their individual volumes to the volume of the solution. Therefore, the formula below can be used to determine how much ethanol is in the beer:

\(% of ethanol by volume= \frac{v}{V}\)Percentage of ethanol by volume =  v / V × 100%

where, v = volume of ethanol

           V = total volume of beer

On putting the given values in the formula:

6.50 % = (v / 750ml) × 100%

So, for the volume of ethanol, the equation can be rearranged to get:

v = (6.50% × 750ml) / 100%

v = 48.75ml

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1.4.1 An exothermic reaction releases energy in the form of heat or light.

1.4.2 An exothermic reaction releases more energy than it absorbs due to the higher potential energy of the reactants compared to the products.

1.5.1 Effective collision requires sufficient energy or activation energy.

1.5.2 Increasing the concentration of sodium hydroxide solution increases the rate of reaction with aluminum due to more frequent effective collisions.

1.6  Increasing the pressure would not affect the rate of the reaction between sodium hydroxide and aluminum.

1.4.1 Exothermic reaction: An exothermic reaction is a chemical reaction that releases energy in the form of heat or light, resulting in an overall decrease in the internal energy of the system.

1.4.2 In an exothermic reaction, the energy released as a result of the reaction is greater than the energy absorbed. This is because the reactants have a higher potential energy compared to the products. The excess energy is released to the surroundings, leading to an overall decrease in the system's internal energy.

1.5.1 One condition for an effective collision is the presence of sufficient energy, often referred to as activation energy. The reacting particles must possess enough energy to overcome the activation energy barrier for successful collision and reaction to occur.

1.5.2 According to collision theory, increasing the concentration of a reactant, such as sodium hydroxide (NaOH) in its reaction with aluminum (Al), would increase the rate of reaction. A higher concentration provides more particles per unit volume, resulting in more frequent collisions and an increased chance of effective collisions.

1.6 An increase in pressure (at constant temperature) would not significantly affect the rate of the reaction between sodium hydroxide and aluminum. The reaction rate is primarily dependent on the concentration of the reactants and the frequency of effective collisions, rather than the pressure. Therefore  the rate would remain the same.

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Answer:

4. the egg shell you place in normal water

Answer: In a closed system, only energy can be exchanged between the system and the surroundings. In the same example of boiling a pot of water, putting the lid on the system changes it from open to closed. This is because when the lid is on the pot, matter can no longer escape.

Explanation:

Answer:

I think its closed

Explanation:

Sorry if its wrong

Answer:

Fe + CuCl2 = FeCl2 + Cu

Explanation:

This is already balanced.

Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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Answer:

15 ml

Explanation:

Volume = mass / density.

So our answer is 15 / 3 = 15 mL

Answer:

5mL

Explanation:

ρ=m/V

V=m/ρ=15/3=5 mL

Hope, this helps you.

An unnamed acid has the pKa value of 4.76. The ratio of the concentration of its protonated to deprotonated forms in a pH environment of 6.8 is 1 : 100.

The Henderson - Hasselbalch equation expression is as follows :

pH = pka + log ( [A⁻] / [HA])

Where

The pH value = 6.8

The pka value = 4.76

By solving the values we get :

6.8 = 4.76 + log ( [A⁻] / [HA])

6.8 - 4.76 = log ( [A⁻] / [HA])

log ( [A⁻] / [HA]) = 2

( [A⁻] / [HA]) = 10²

( [A⁻] / [HA]) = 10

The ratio of the protonated to deprotonated is as :

( [HA] /  [A⁻] ) = 1 : 100

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Answer:

C is the answer to your question

Answer:10-3

Explanation:

To count atoms, we can find the total sum of the subscripts in a chemical compound.

This is the case for most compounds. In some cases, we will have to multiply subscripts when there are elements inside brackets.

We're given:

Li₂SO₂

In front of lithium (Li), there is a 2.

In front of sulfur (S), there is nothing, which means 1.

In front of oxygen (O), there is a 2.

Add:

2 + 1 + 2 = 5

Therefore, there are 5 atoms in Li₂SO₂.

5 atoms

ideal gas

PV=nRT

T = PV/nR

T = 1 x 12/9 x 0.08205

T = 16.25 K

The ionization of the following acids can be represented as:

Tetraoxosulphate (VI) Acid (\(H_{2}SO_{4}\)) ionizes as H+ and SO4^2- ions.

Trioxonitrate (V) Acid (\(HNO_{3}\)) ionizes as H+ and \(NO_{3-}\) ions.

Ethanoic Acid (\(CH_{3}COOH\)) ionizes as H+ and \(CH_{3}COO^{-}\) ions.

Tetraoxosulphate (VI) Acid, also known as sulfuric acid (\(H_{2}SO_{4}\)), ionizes as follows:

\(H_{2}SO_{4}\) → \(H+\) + \(SO_{4}^{2-}\)

In this reaction, sulfuric acid donates two hydrogen ions (H+) to the solution, forming sulfate ions (\(SO_{4}^{2-}\)).

Trioxonitrate (V) Acid, commonly known as nitric acid (\(HNO_{3}\)), ionizes as follows:

\(HNO_{3}\) → \(H+_{}\) + \(NO_{3-}\)

Nitric acid dissociates to release one hydrogen ion (\(H+\)) and a nitrate ion  (\(NO_{3-}\)).

Ethanoic Acid, also known as acetic acid (\(CH_{3}COOH\)), ionizes as follows:

\(CH_{3}COOH\) → H+ + \(CH_{3}COO^{-}\)

Acetic acid donates a hydrogen ion (H+) to the solution, forming an acetate ion (\(CH_{3}COO^{-}\)).

In all cases, the acids dissociate in water, producing hydrogen ions (H+) as positively charged ions and their corresponding anions. The hydrogen ions are responsible for the acidic properties of these substances, while the anions contribute to the overall charge balance in the solution. The ionization of acids allows them to conduct electricity in aqueous solutions and react with other substances.

The question was incomplete. find the full content below:

Indicate the ionization of the following acids,

Tetraoxosulphate (VI) Acid

Trioxonitrate (V) Acid

Ethanoic Acid.​

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The properties of an alloy are similar to the properties of its components. The elements in an alloy are not combined in fixed proportions is an alloy not considered a compound

Although the physical characteristics of the alloy are intermediate to those of its component metals, the chemical characteristics of each element are unaltered. Physical methods can be used to separate an alloy (separated by melting). A compound is a collection of several components that are connected by chemical connections.

Metal mixes or blends of a metal and another element are known as alloys. A combination of metallic phases or a solid solution of metal elements, known as an alloy, are both possible (a heterogeneous mixture of two or more solutions).

An alloy is a combined, homogenous combination of a metal with other metals or non-metals.

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Answer: Answer is B and C

b: the properties of an alloy are similar to the properties of its components.

c: The elements in an alloy are not combined in fixed propo

Explanation:

Answer:

100 thousand million stars

Explanation:

Answer:

100 to 400 billion stars

1) Chemical equation.

2) Types of reaction.

Synthesis. A compound is made from simpler materials.

Single replacement. One element that starts out by itself replaces another element in a compound.

Double replacement. Positive and negative ions in two compounds switch places.

Decomposition. A compound is broken down into simpler compounds.

Combustion. A compound containing Carbon and Hydrogen combines with Oxygen gas and produces carbon dioxide and water.

3) The chemical equation above is a decomposition.

Explanation:

Evolution means Gradual Development. It is a procedure in the gradual development in which species of different animal's, plants etc... leisurely started to change some of their activities or elements and it changes only due to some situations it changes over many generations also.

Answer:

mark me as a brainlist answer i hope it will help you

Explanation:

Evolution means Gradual Development. It is a procedure in the gradual development in which species of different animal's, plants etc... leisurely started to change some of their activities or elements and it changes only due to some situations it changes over many generations also.

A)Concentration of NH4+ = 0.041 * 0.0100 M = 0.00041 M

B)Concentration of molecular NH3 = 0.0100 M - 0.00041 M = 0.00959 M

C)Ka = (0.00041 M)(0.00041 M) / 0.00959 M = 1.76 x 10^-5

D)[OH-] after NH4Cl addition = 0.00041 M - 0.0090 M = -0.00859 M (negative value indicates that OH- is completely consumed)

To calculate the values requested, we can use the given information and the concept of ionization of aqueous ammonia. The ionization reaction is as follows:

NH3 + H2O ⇌ NH4+ + OH-

(a) To determine the concentration of NH4+ and OH- ions:

Given that the ammonia solution is 4.1% ionized, this means that 4.1% of the initial concentration of NH3 has ionized.

Concentration of NH4+ = 0.041 * 0.0100 M = 0.00041 M

Concentration of OH- = 0.00041 M

(b) To find the concentration of molecular ammonia:

Concentration of molecular NH3 = initial concentration - concentration of NH4+

Concentration of molecular NH3 = 0.0100 M - 0.00041 M = 0.00959 M

(c) To calculate the ionization constant (Ka) of aqueous ammonia:

Ka = [NH4+][OH-] / [NH3]

Ka = (0.00041 M)(0.00041 M) / 0.00959 M = 1.76 x 10^-5

(d) When 0.0090 mol of NH4Cl is added to 1 L of the solution, it reacts with OH- to form NH3 and H2O. The NH4Cl dissociates fully, providing 0.0090 mol of NH4+ and Cl- ions.

Since NH4+ reacts with OH-, the concentration of OH- will decrease by 0.0090 M.

[OH-] after NH4Cl addition = 0.00041 M - 0.0090 M = -0.00859 M (negative value indicates that OH- is completely consumed)

Please note that the negative value for [OH-] is not physically meaningful in this context, as the actual concentration cannot be negative. It suggests that all OH- ions have been consumed in the reaction, and the solution is now acidic.

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The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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The number of molecules in the permanganate is 4.8 * 10^22 molecules

We know that if we are to obtain the number of molecules form the number of the moles of the substances then as a matter of necessity we would have to turn to the Avogadro's law and that is what we are going to do here.

We have that;

If 1 mole contains about 6.02 * 10^23 molecules

0.08 moles would contain 0.08 * 6.02 * 10^23/ 1

= 4.8 * 10^22 molecules

Hence, we have about 4.8 * 10^22 molecules in the permanganate

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As a result, the container's partial pressure of Hydogen is 163.2 torr.

The partial pressures of the individual gases make up the total pressure of the gas combination. The total number of moles in the gas mixture, or ntot, is equal to the sum of all ni. Ptot = Pi = P1 + P2 + P3...

Calculating the total moles of gas in the container is the first step.

n(total) = n(H2) + n(O2) + n(SO2)

= 0.40 mol + 0.80 mol + 0.80 mol

= 2.0 mol

Next, we need to use the mole fraction of H2 to calculate its partial pressure:

X(H2) = n(H2) / n(total)

= 0.40 mol / 2.0 mol

= 0.20

The mole fraction of H2 is 0.20, so we can use this to find the partial pressure of H2:

P(H2) = X(H2) x P(total)

= 0.20 x 816 torr

= 163.2 torr.

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Answer and Explanation:

a. fluorine ⇒ atomic element

Fluorine (F) is a chemical element because it is a pure substance that cannot be decomposed into simpler substances.

b. N₂O ⇒ molecular compound

We can see that N₂O (nitrous oxide) is a molecule composed by two different atomic elements: nitrogen (N) and oxygen (O). Thus, it is a molecular compound.

c. silver ⇒ atomic element

Silver is a chemical element with the symbol Ag. It is a pure substance which cannot be decomposed into simpler substances.

d. K₂O ⇒ ionic compound

Potassium oxide (K₂O) is composed by a metallic element (potassium, K) and a non-metallic element (O). Thus, there is a difference in the electronegativity of the chemical elements, so the substance can dissociate into ions. In consequence, it is an ionic compound.

e. Fe₂O₃ ⇒ molecular compound (with ionic character)

Iron(III) oxide (Fe₂O₃) is composed by iron element (Fe), which is a metal, and oxygen element (O), which is a non-metal. Since it is a Metal- Non-Metal combination, it would be an ionic compound. The difference in electronegativity between Fe and O is not high (<2.0) in comparison with other ionic compounds, so Fe₂O₃ is considered as a polar covalent compound (it is between an ionic compound and a molecular compound).