nucleophilic addition of a carbonyl group under basic conditions takes place with which of the following? select answer from the options below formation of a carbanion formation of an alkoxide ion protonation of the carbonyl carbon protonation of the carbonyl oxygen

Answer: 574000000

Explanation: I hope this helps!

5.74 ⇒ 57.4 ⇒ 574 ⇒5740 ⇒ 57400 ⇒ 574000 ⇒ 5740000 ⇒

57400000 ⇒ 574000000

Answer:

B. Smaller Particles

Explanation:

We know that the rate of reaction increases with increase in the surface area of reactants.

The reacting particles in the log of wood are embedded inside the wood making only very minimal amount of particles available for reaction. This  ultimately slows down the rate of combustion.

However, in saw dust, there is a greater availability of surface area of reactants hence the sawdust burns faster than logs.

Answer:

For the wavelenth of light spectrum, I believe the order would be red visible light, infrared, microwaves and radio waves.

Answer:

iTS FLIPPED

Explanation:

Answer:

i don't know sorry so lets be friends

The Ksp of the salt AB at 25 °C is 1.8 x 10^-7 M^2. Option A is the correct answer.

The given information states that only 0.0450 mol of the salt AB is soluble in 1.00 L of water at 25 °C. Using this information, we can determine the molar solubility of AB, which is the amount of AB that dissolves per liter of water. In this case, the molar solubility is 0.0450 M.

The Ksp (solubility product constant) is a measure of the equilibrium between the dissolved ions and the undissolved solid in a saturated solution. For the dissociation of AB into A+ and B- ions, the equilibrium expression is [A+][B-]. Since the stoichiometry of the reaction is 1:1, the Ksp can be calculated as the square of the molar solubility: Ksp = (0.0450)^2 = 1.8 x 10^-7 M^2.

Therefore, the Ksp of the salt AB at 25 °C is 1.8 x 10^-7 M^2, which corresponds to option A).

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Taking into account the Newton's second law, the correct answer is option A. F = 9.68 N right

In first place, acceleration in a body occurs when a force acts on a body.

Newton's second law states that a force will change the speed of an object because the speed and/or direction will change. These changes in velocity are called acceleration.

So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object

Mathematically, Newton's second law is expressed as:

F= m×a

where:

In this case, you know:

Replacing in Newton's second law:

F= 2.2 kg× 4.4 m/s²

Solving:

F= 9.68 N

Finally, As the bowl of fruit accelerates to the right, the correct answer is option A. F = 9.68 N right

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Answer:

No. of neutrons = 27 - 13 = 14

No. of protons = No. of electrons = 13

Hope it helps you

CaCl2 is the compound which is more likely to be ionic .

Ions, charged particles that develop when an atom (or group of atoms) gets or loses electrons, are the building blocks of ionic compounds. An anion is a negatively charged ion, whereas cations are positively charged ions. When two elements create molecules by a covalent link and share electrons, this results in covalent or molecular compounds.

When Cacl2 dissolve in  aqueous solution it gives Ca+² and cl- ions.

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The formulas of the compounds that were shown are;

CaCl2

K2S

AlBr3

BeF2

MgS

Ionic compounds are a type of chemical compound made up of ions, which are atoms or molecules that have a positive or negative charge due to the gain or loss of electrons. In ionic compounds, positive ions (cations) are typically metal atoms, while negative ions (anions) are typically non-metal atoms. These ions are held together in a crystal lattice structure by strong electrostatic forces, forming a solid, crystalline substance.

Ionic compounds typically have high melting and boiling points, and they are often soluble in water. They are also typically poor conductors of electricity in the solid state, but good conductors in the melted or dissolved state due to the movement of ions.

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Answer:

All waves of the electromagnetic spectrum have a speed of 3 × 10⁸ ms⁻¹

Direct expansion systems require the vapour exiting the evaporator to be superheated to avoid liquid slugging, to improve the effectiveness of the evaporator and to maintain the stability of the compressor. (B) Forced draft and induced draft evaporators differ in the way air is introduced into them. (C) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant. (ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant and H2O is not classified as a refrigerant. (D) The partial pressure of hydrogen in the evaporator is 1.6 mmHg.

(a) Direct expansion systems are those in which the refrigerant in the evaporator evaporates directly into the space to be cooled or frozen. The evaporator superheat is used to make sure that only vapor and no liquid is carried over into the suction line and compressor. Superheating is required for the following reasons :

(b) Forced draft and induced draft evaporators differ in the way air is introduced into them. In an induced draft evaporator, a fan or blower is positioned at the top of the evaporator, and air is drawn through the evaporator from the top. In a forced draft evaporator, air is propelled through the evaporator by a fan or blower that is located at the bottom of the evaporator. Forced draft evaporators are frequently used in direct expansion systems because they allow for better control of the air temperature. Because the air is directed upward through the evaporator and out of the top, an induced draft evaporator is less effective at keeping the air at a uniform temperature throughout the evaporator.

(c) (i) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant.

(ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant.

(iii) H2O is not classified as a refrigerant.

(d) The function of hydrogen gas in an absorption refrigeration system (NH3/H2O/H2) is to increase the heat of reaction between ammonia and water.

The pressure of hydrogen gas in the evaporator of an absorption refrigeration system can be determined using the formula, Pa/Pb = (Ta/Tb)^(deltaS/R),

where Pa = partial pressure of hydrogen in the evaporator, Ta = evaporating temperature, Tb = condensing temperature, Pb = partial pressure of hydrogen in the absorber, deltaS = entropy change between the absorber and evaporator, R = gas constant.

Substituting the given values, Ta = −2.0 ∘C = 271 K ; Tb = 38.0 ∘C = 311 K ; Pb = atmospheric pressure = 1 atm ;

deltaS = 4.7 kJ/kg K ; R = 8.314 kJ/mol K

we get, Pa/1 atm = (271/311)^(4.7/8.314)

Pa = 0.021 atm or 1.6 mmHg

Therefore, the partial pressure of hydrogen in the evaporator is 1.6 mmHg.

Thus, Direct expansion systems require the vapour exiting the evaporator to be superheated to avoid liquid slugging, o improve the effectiveness of the evaporator and to maintain the stability of the compressor. (B) Forced draft and induced draft evaporators differ in the way air is introduced into them. (C) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant. (ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant and H2O is not classified as a refrigerant. (D) The partial pressure of hydrogen in the evaporator is 1.6 mmHg.

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The empirical formula of the compound is H1.94S1, which can be simplified to approximately H2S. This suggests that the compound consists mainly of hydrogen and sulfur and is likely hydrogen sulfide (H2S).

To determine the identity of the compound with 2.00% hydrogen, 32.7% sulfur, and 65.3% of another element, we can analyze the mass percentages of each element and use that information to find the empirical formula.

Given:

Percentage of hydrogen (H) = 2.00%

Percentage of sulfur (S) = 32.7%

Percentage of another element = 65.3%

Assuming a 100g sample of the compound, we can calculate the mass of each element:

Mass of H = 2.00% of 100g = 2.00g

Mass of S = 32.7% of 100g = 32.7g

Mass of the other element = 65.3% of 100g = 65.3g

Now, we need to convert the masses into moles to determine the mole ratio of each element in the compound. We can use the molar masses of hydrogen (H = 1.01 g/mol) and sulfur (S = 32.07 g/mol).

Moles of H = Mass of H / Molar mass of H = 2.00g / 1.01 g/mol = 1.98 mol

Moles of S = Mass of S / Molar mass of S = 32.7g / 32.07 g/mol = 1.02 mol

Moles of the other element = Mass of the other element / Molar mass of the other element = 65.3g / (molar mass of the other element)

Now, we can determine the mole ratio between the elements by dividing each mole value by the smallest number of moles (which is 1.02 mol):

Moles of H / 1.02 mol = 1.94

Moles of S / 1.02 mol = 1.00

Moles of the other element / 1.02 mol = (mole ratio of the other element)

Based on the mole ratios, we can see that the mole ratio of hydrogen to sulfur is approximately 1.94:1 and the mole ratio of sulfur to the other element is 1:1.

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Answer:

thats the answer

Explanation:

Answer:

4 hours,19 minutes,60 seconda

Explanation:

just add everything up

One of the costs associated with a minimum wage is that it creates a shortage of workers.

When a minimum wage is implemented, it establishes a legally mandated floor for the wages that employers must pay to their workers. While the intention behind a minimum wage is to ensure fair compensation and improve the standard of living for low-wage workers, it can have unintended consequences on the labor market.

One of the costs associated with a minimum wage is the creation of a shortage of workers. When the minimum wage is set above the equilibrium wage rate determined by market forces, it increases labor costs for employers. As a result, some employers may be unable or unwilling to pay the higher wage and may reduce their workforce or scale back hiring.

The increased labor costs can make it economically unviable for certain businesses, especially small businesses with limited profit margins, to maintain their current staffing levels. This can lead to a decrease in job opportunities and a shortage of available positions for workers. Additionally, businesses may also choose to substitute labor with capital or technology to reduce their reliance on higher-cost labor.

The shortage of workers arises because the minimum wage creates a price floor for labor, and when the wage exceeds the market equilibrium, it distorts the supply and demand dynamics. This mismatch between the wage rate and the quantity of labor demanded can result in fewer job opportunities and a shortage of workers.

Therefore, one of the costs associated with a minimum wage is the creation of a shortage of workers in the labor market.

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The solubility product of the copper(II) iodate is 1.25 * 10^-7

The term solubility has to do with the amount of a substance that is dissolved in water. The solubility product is the equilibrium constant that shows the extent to which a substance is dissolved in water.

We have to convert the solubility of the  copper(II) iodate from g/mL to molarity and we have;

Number of moles = 0.13 g/413 g/mol = 3.15 * 10^-4 moles

Volume of the solution = 100 mL or 0.1 L

Molarity =  3.15 * 10^-4 moles/0.1 L

= 3.15 * 10^-3 M

We now have;

Ksp = [x] [2x]^2

Ksp = 4x^3

Ksp = 4( 3.15 * 10^-3 )^3

Ksp = 1.25 * 10^-7

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If a company like Apple were to learn about an environmental mining disaster at a copper mine from which they acquire materials, they should respond by taking immediate action to address the situation.

Firstly, the company should investigate the impact of the disaster on the local environment and the communities living in the area. They should work with independent experts and local stakeholders to understand the extent of the damage and the potential long-term consequences. This information will be crucial in determining the appropriate response.

Secondly, the company should review their supply chain and identify any potential risks or issues related to the mining operations. They should engage with their suppliers and work together to address the situation and ensure that responsible mining practices are being followed.

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Answer:

The mass of water that uses 7500 J to increase the temperature from 2°C to 3°C is 179.543 grams

Explanation:

The given parameters are

Change in Heat , ΔH = 7500 J

The change in temperature ΔT = 2°C to 3°C = 3 - 1 = 1°C

The specific heat capacity for water is given as Δc = 4.184 J/(g·°C)

The heat of fusion, \(\Delta H_{fus}\) = 334 J/g

The heat of vaporization, \(\Delta H_{vap}\) = 2260 J/g

The formula for heat capacity is given as follows;

ΔH =  m × Δc × ΔT

Given that the temperature of the process is above the melting point temperature of 0°C and below the boiling point temperature of 100°C, we make use only of the heat capacity of liquid water

Therefore, we have;

7500 J = m × 4.184 × 1

\(m = \dfrac{7500}{4.184 \times 1} = 1792.543 \ g\)

The mass of water that uses 7500 J to increase the temperature from 2°C to 3°C = 179.543 grams.

Answer:

i. The height of its jump is approximately 0.115 m

ii. The time of flight of its jump is approximately 0.306 seconds

iii. The range of its jump is approximately 0.795 m

Explanation:

The angle at which the grasshopper jumps, θ = 30°

The speed with which the grasshopper takes off, u = 3 m/s

i. The height of its jump 'h', is given by the following relation;

\(h = \dfrac{u^2 \times sin^2 \theta}{2 \times g}\)

Where;

g = The acceleration due to gravity ≈ 9.81 m/s²

Therefore;

\(h \approx \dfrac{3^2 \times sin^2 (30^{\circ})}{2 \times 9.81} = \dfrac{25}{218} \approx 0.115\)

The height of its jump, h ≈ 0.115 m

ii. The time of flight of its jump, 't', is given as follows;

\(The \ time \ of \ flight, \, t = \dfrac{2 \times u \times sin \theta}{ g}\)

Therefore;

\(t \approx \dfrac{2 \times 3 \times sin (30 ^ {\circ})}{ 9.81} = \dfrac{100}{327} \approx 0.306\)

The time of flight of its jump, t ≈ 0.306 seconds

iii. The range of the jump is given by the following projectile motion equation for the range as follows;

\(R = \dfrac{u^2 \times sin (2 \times \theta)}{ g}\)

Therefore;

\(R \approx \dfrac{3^2 \times sin (2 \times 30^ {\circ})}{ 9.81} = \dfrac{41659} {52433} \approx 0.795\)

The range of the jump, R ≈ 0.795 m.

Answer:

0.59

Explanation:

Is 0.59 because you are dividing 35.0g by 58.5 which will than give you 0.59

Answer:

1.213 g/mol

Explanation:

We are given that the molecular mass is 7.304 × 10²³ g.

From avogadro's number, we know that;

1 mole of a substance = 6.022 × 10²³ molecules

Thus;

Molar mass = molecular mass/avogadro's number = (7.304 × 10²³)/(6.022 × 10²³) = 1.213 g/mol

Due to the presence of two reactants and a single product, both chemical reactions X and Y are possible.

A synthesis reaction results in the formation of a single product that is more complicated than the initial reactants when two or more reactants are present.

When two or more reactants unite to create a single product, the reaction is called a synthesis. The general equation A + B = AB is used to describe this kind of reaction.

According to the definition of synthesis reactions, two reactants unite to create a chemical. In a synthesis reaction, two or more substances mix chemically to generate a single compound or a product.

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Answer: A

Explanation: It said on Course Hero

The amount of charge transferred is 38594 Coulombs.

The chemical reaction for reduction of copper ions is -

\( {Cu}^{+ } \) + \( {e}^{- } \) → Cu where \( {Cu}^{+ } \) represents copper ions, \( {e}^{- } \) represents electrons and Cu is solid copper.

As per the reaction, 1 mole of electron is required for reduction to copper. So, 0.400 mole of copper ions will require 0.400 moles of electron.

Calculating the charge with formula -

Q = n × F, where Q represents charge, n is number of models and F is Faraday constant. Taking F as 96485 C/mole.

Keep the values in formula to find the coulombs of charge.

Q = 0.400 × 96485

Performing multiplication

Q = 38,594 Coulombs

Thus, 38594 Coulombs charge is transferred.

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Molecules that have the same chemical formula (same numbers of each atom) but different three-dimensional shapes are called isomers.

The isomers can be categorized into following categories:

1) Chain Isomers - The molecules known as chain isomers have the same chemical formula but differing configurations of the carbon'skeleton. The foundation of organic compounds are chains of carbon atoms, and for many of these molecules, this chain can be structured in a variety of ways, either as a single, uninterrupted chain or as a chain with numerous side groups of carbons branching off.

2) Position Isomers - Position isomers are based on the movement of a 'functional group' inside the molecule. The component of a molecule that provides it its reactivity is referred to in organic chemistry as a functional group.

3) Functional isomers - These are isomers, also known as functional group isomers, in which the kind of functional group in the atom is altered but the molecular formula is left unchanged. By rearranging the atoms in the molecule such that they are connected to one another in various ways, this is made feasible. For instance, a typical straight-chain alkane (which merely has carbon and hydrogen atoms) can have a functional group isomer that is a cycloalkane, which is only a group of carbon atoms bound together to create a ring

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NH4NO3(s) ==> 2 H2O(g) + N2O (g) (balanced)

a) We need the molar masses for each compound:

NH4NO3 = 80.0 g/mol (ammonium nitrate)

H2O = 18 g/mol (water)

0.555 kg => 1 kg = 1000 g => 0.555 kg = 555 g

80.0 g NH4NO3 -------- 2 x 18 g H2O

555 g NH4NO3 -------- X = 250 g

Answer a): 250 g water

b) % yield of water

120. g of water = actual yield

250 g of water from a) is the theoretical yield

Therefore, the % yield:

% yield = (actual yield/ theoretical yield) x 100

% yield = 120. g water/250 g water x 100

% yield = 48 %

Answer b): % yield = 48 %

Dimethylaminopyridine hydrochloride (dmap) is a recyclable catalyst used for the acylation of alcohols to form esters. It used used in a base free condition. Therefore, the statement is false.

A catalyst is  chemical substance used to boost the rate of a reaction without undergoing a change itself. Hence, catalyst provide favorable platform for a reaction to occur.

Dimethylaminopyridine is a basic compound which and it is a recyclable catalyst used for the esterification reactions. In esterification alcohols are acylated to form esters using DMAP in the presence of acetic anhydride.

Acetic anhydride forms acetate ions which act as the base to accept the proton from the alcohol and it adds to the nucleophile DMAP. Hence, no need of any base such as triethylamine. Thus, the statement is false.

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Answer:

the top one is 100.000 and bottom one is 100.000

Explanation:

Answer: b

Explanation: