How do polar aprotic solvents favor SN2 reactions?

The entropy of the surrounding when an exothermic reaction takes place increases.

A reaction is defined as exothermic if the overall standard enthalpy change (H) is negative. Exothermic processes typically releases heat.

Example of Exothermic reaction:

CaO+H2O   Ca(OH)3 + Heat

Entropy is a measurable physical characteristic and a scientific notion that is frequently connected to a condition of disorder, unpredictability, or uncertainty.

Now you know as in exothermic reaction heat is given to the surrounding hence more heat is added to the surrounding which results in the rising of entropy of the surrounding.

Hence, the entropy of the surrounding when an exothermic reaction takes place increases.

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Answer:

I think D

Explanation:

Answer:

A

Explanation:

Sediment, as a physical pollutant, impacts receiving waters in the following principal ways: High levels of turbidity limit penetration of sunlight into the water column, thereby limiting or prohibiting growth of algae and rooted aquatic plants.

The light reaction is known as the first stage of photosynthesis process. The ultimate source of electrons that are transferred during the light-dependent reactions of photosynthesis is water.

The light dependent reaction is also called the photolysis in which solar energy is converted into chemical energy in the form of ATP and NADPH. This reaction generally occurs in the grana of chloroplasts.

The ultimate source of electrons supplied to the photosynthesis reaction is water. The light energy from the sun is generally used for the splitting of water into oxygen, electrons and 4H⁺ ions.

Thus the ultimate source of the electrons in light-dependent reactions of photosynthesis is water.

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Answer:

See below ↓↓↓↓

Explanation:

1)

a)

b)

c)

d)

The net-ionic equation for the precipitation reaction that occurs upon the addition of a 1 M solution of calcium ions to a solution containing hydrogen phosphate ions is Ca²⁺ + HPO₄²⁻ → CaHPO₄(s).

To write out the net-ionic equation for the precipitation reaction that occurs when hydrogen phosphate ion is combined with a 1 M solution of a cation,  include the terms net-ionic equation, precipitation reaction, hydrogen phosphate ion, and 1 M solution.

Step 1: Identify the reacting ions.
In this case, the hydrogen phosphate ion is  HPO₄²⁻

Step 2: Identify the cation that would form a precipitate with the hydrogen phosphate ion.
A common cation that forms a precipitate with hydrogen phosphate ion is calcium (Ca^(2+)). When added to a 1 M solution, the calcium ions will react with the hydrogen phosphate ions.

Step 3: Write out the molecular equation for the reaction.
Ca²⁺ + HPO₄²⁻ → CaHPO₄(s)

Step 4: Write out the net-ionic equation for the precipitation reaction.
Since there are no spectator ions in this reaction, the net-ionic equation is the same as the molecular equation:

Ca²⁺ + HPO₄²⁻ → CaHPO₄(s)

So, the net-ionic equation for the precipitation reaction that occurs upon the addition of a 1 M solution of calcium ions to a solution containing hydrogen phosphate ions is Ca²⁺ + HPO₄²⁻ → CaHPO₄(s)

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Answer:

the answer is B

Al(s) ⇒ Al3+(aq) + 3e-

and Au+(aq) + e- ⇒ Au(s)

Answer:

A. Heat flows from block 1 to block 2

Explanation:

Thermal or heat energy flows when objects of different temperature come in contact. Heat naturally flows from hot objects (high temperature) to cold objects (low temperature) and will keep on flowing until an equilibrium is reached.

According to this question, two blocks of metal, which are of different temperatures, are illustrated to be in contact. Block 1 is at 60°C while Block 2 is at 25°C. Block 1 is hotter than Block 2, hence, heat will flow from block 1 to block 2.

"The amount of energy absorbed or released in the process of melting or freezing is the same per gram of substance" is true.

The amount of energy absorbed or released during the process of melting or freezing, known as the heat of fusion, is the same per gram of substance. This is a fundamental property of phase transitions. When a substance undergoes melting, it absorbs heat energy to break the intermolecular forces holding the particles together and transition from a solid to a liquid state. Conversely, during freezing, the substance releases the same amount of heat energy as it transitions from a liquid to a solid state, with the particles forming ordered arrangements and reestablishing intermolecular forces. Since the heat of fusion is a specific characteristic of a substance, it remains constant per gram of the substance, regardless of the quantity being melted or frozen.

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The water will be lost from a full flask if 52.5 g of Silver is 5 ml.

Density is the measurement of the way tightly a cloth is packed collectively. Its miles are defined because the mass is in keeping with unit volume. D or ρ Density formulation: ρ = m/V, in which ρ is the density, m is the mass of the object and V is the quantity of the object.

Density = mass/ volume

volume = mass/density

            = 52.5 g /  10.49g/mL

           = 5 ml

Density is an essential concept because it lets us decide what materials will go with the flow and what substances will sink while located in a liquid. typically, materials drift so long as their density is much less than the density of the liquid they are located in.

The density of a substance is the relationship between the mass of the substance and how much space it takes up. The mass of atoms, their size, and how they are arranged decide the density of a substance. Density equals the mass of the substance divided by way of its quantity; D = m/v.

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The statement accurately describes an object's weight and mass is option C.  Its weight changes with gravitational force, but its mass does not.

Gravitational force is the force by which an object attracts other objects into its center of mass.  Earth attracts every objects into the ground by gravitational pulling. That is why we are all standing on earth's surface.

The mass of an object is the total amount of it. It is fixed and does not change any where. However, the weight we experience on earth is  due to the gravity. The weight of object is the product of the mass and acceleration due to gravity of the planet.

Weight of an object will vary from planet to planet with the change in the acceleration due to gravity. The weight we experience in moon is very less compared to that in earth. However our mass is constant. Hence, option C is correct.

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If a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite, fizzing will occur because carbon dioxide is produced.

Effervescence observes whenever any gas tried to escape out from an aqueous solution, that's why CO₂ show effervescence.

Reaction between dolomite and acetic acid will be represented as:

MgCO₃ + 2CH₃COOH → CO₂ + H₂O + Mg(CH₃COO)₂

From the above reaction it is clear that carbon dixide gas is produced by showing the effervescence and fizzing behavior.

Hence, option (2) is correct.

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Answer:

B

Explanation:

on edge2022

If we add a much larger excess of t-butyl alcohol to the benzene ring in highlighted positions continue then ther will be no further friedel crafts alkylation would continue to occur due to stric hindrance.

First step is aromatic electrophilic substitution. As present in above first figure. The above product result is more expected because these positions are more electron rech. Second step, as we know ortho and para position are more reactive when one OCH₃ group in conjugation, similar for next OCH₃group. In both of reaction the ortho position, of OCH₃ is more electron dense. The last step of Reactions present in above figure.

The further addition of bulky groups, t-butyl groups to the benzene ring to highlighted positions would not continue the friedel crafts alkylation.

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The required volume flow rate of liquid ethyl alcohol to supply at a rate of 2000 kJ/s is approximately 164.9 L/min.

To determine the required volume flow rate of liquid ethyl alcohol, we need to calculate the fuel flow rate first. Then, we can convert it to volume flow rate.

Given:

Rate of energy release (Q) = 2000 kJ/s

Excess air = 40% (or 0.4)

First, let's calculate the fuel flow rate (m f):

Q = m f × Lower Heating Value (LHV)

The Lower Heating Value (LHV) for ethyl alcohol can be calculated using the enthalpy of vaporization:

LHV = enthalpy of vaporization / molecular weight of fuel

LHV = 42,340 kJ/k mol / 46.07 kg/k mol = 920.11 kJ/kg

Now, we can calculate the fuel flow rate:

m f = Q / LHV

m f = 2000 kJ/s / 920.11 kJ/kg ≈ 2.173 kg/s

Next, let's convert the fuel flow rate to volume flow rate:

Volume flow rate (V f) = m f / density

V f = 2.173 kg/s / 790 kg/m³ = 0.002749 m³/s

Finally, we can convert the volume flow rate to L/min:

V f = 0.002749 m³/s × (1000 L/1 m³) × (60 s/1 min) ≈ 164.9 L/min

Therefore, the required volume flow rate of liquid ethyl alcohol to supply at a rate of 2000 kJ/s is approximately 164.9 L/min.

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Answer: 2 : 1

Explanation:

Cation :

Ca - calcium = atomic number = 20

Electron dot configuration : 2, 8, 8, 2

Ca losses 2 electrons in its outermost shell and thus has a charge of 2+ in other to attain a stable octet state.

Anion:

F - has 7 valence electrons and thus needs 1 electron to achieve a stable octet state, hence it accepts one electron has has a charge of (-1)

Therefore,

Ratio of cation (+) to negative (-) = 2 :1

The result of the Coriolis effect is the rotation of the earth on its axis. So the correct option is B.

The Coriolis effect is a type of force to which the fluids of the earth are exposed. It is the acceleration they receive due to the rotation of the earth, what is generated is a deviation in their trajectory which now causes their trajectory to be curved. This force it is exposed to is called the coriolis force, but it is not a real force since there is nothing pushing on it.

The acceleration to which the fluids are exposed will be perpendicular to the axis of rotation of the earth and to the components of its velocity.

Therefore, we can confirm that the correct option is B. the rotation of the earth on its axis.

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The Coriolis effect is the result of which of the following?

A. winds spinning off the equator

B. the rotation of the earth on its axis

C. the different air movements north and south of the equator

D. the friction that slows down winds near the earth’s surface

Answer:

Chemical defense

Explanation:

so we know it cant be mimicry because that means to mimic another animal for defense.

It cant be camouflage because it would be pretty d*mn hard to hide with neon colors.

So that leaves you with chemical defense and warning coloration

Answer:

N,I and F

hope this helps

Explanation:

A good description of bacterial reproduction is rapid reproduction through binary fission. That is option A.

Binary fission is defined as the type of asexual reproduction whereby an organism multiplies to form new organisms through the separation of the body into two new bodies.

The process of binary fission include the following:

Under ideal conditions some bacterial species may divide every 10–15 minutes—a doubling of the population at these time intervals.

Therefore, the good description of bacterial reproduction is rapid reproduction through binary fission.

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Answer:

See the answer below

Explanation:

Read the following passage and identify the error. During germination, the fertilized egg begins to sprout and grow. Each seed contains an embryo, or tiny plant, and it needs the right condition to grow. These conditions include the basic need of water, the correct temperature, and the right location, which is in the soil. Select the statement that corrects the error in the passage. Seeds are fertilized during germination, not before. Basic conditions include wind, not water. The fertilized egg begins to grow and mature, not an embryo. The fertilized seed begins to grow and sprout, not an egg.

A typical seed consists of a fertilized ovule which forms the embryo. Double fertlization ensures that a structure, the endosperm, surrounds and provide nutrition to the embryo while in a state of inactivity.

During germination, the embryo sprouts and grows given the right conditions of moisture, air, temperature, and other factors that may vary from seeds to seeds.

Answer:

B.

Explanation:

B. low temperature, high dissolved oxygen, and neutral pH

Hope this Helps.

Based on the 1H-NMR spectrum and the molecular formula provided, we can propose the structure of the compound as butan-1-ol. The spectrum indicated the presence of a CH3 and an OH group, and the molecular formula confirmed that the compound was an alcohol with a chain of four carbon atoms.

The 1H-NMR spectrum provided shows two distinct peaks, one at 1.2 ppm and another at 3.7 ppm. From these peaks, we can deduce that the compound has two distinct sets of hydrogen atoms. The peak at 1.2 ppm indicates the presence of a CH3 group, while the peak at 3.7 ppm indicates the presence of an OH group. Since the molecular formula of the compound is C4H10O, we can infer that it is an alcohol with a chain of four carbon atoms.
From the above information, we can propose the structure of the compound as butan-1-ol. The CH3 group corresponds to the methyl group at position 1, while the OH group corresponds to the hydroxyl group at position 4. The other two carbon atoms in the chain are bonded to two hydrogen atoms each, giving us the molecular formula of C4H10O.
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Answer:

true

Explanation:

Answer:

A. observing

Explanation:

There are various steps that are involved in a scientific investigation. Observation is the first step of the scientific investigation. In this step, a close examination is laid on the investigation. Observation is collected with the senses and the information is gathered.

In the given excerpt, Clive missed the observation part of the scientific investigation. All the other three steps were followed by Clive. He was not able to observe the situation and so was not able to provide the answers to the questions asked by his classmates.

Carbon dioxide,Ammonia,Oxygen,Water,Hydrogen fluoride,Nitrogen are the polarity of 6 real molecules

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Answer:

1: Killing a specific gene.

2: augmentation of a gene.

3: Inserting a new dominant gene.

Explanation:

k = -1/(slope of plot) is the correct answer to identify the rate constant k for the reaction based on the information in the plot of ln[H2O2] versus time (t).

Therefore, the rate constant can be determined by finding the slope of the plot and then using the formula k = -1/(slope of plot)

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There are 210 kilocalories in a portion of food that contains 8 g protein, 10 g fat, and 22 g carbohydrate. The amount of vitamin C and water in the food does not contribute to the number of kilocalories, as they are not sources of energy.

Proteins are large, complex molecules that are made up of long chains of amino acids. They are essential for the growth, repair, and maintenance of tissues in the body, and are involved in a wide range of biological processes.

To calculate the number of kilocalories in a portion of food, we need to use the following formula:

Calories = (grams of protein x 4) + (grams of fat x 9) + (grams of carbohydrate x 4)

Using this formula, we can calculate the number of calories in the given portion of food:

Calories = (8 g protein x 4) + (10 g fat x 9) + (22 g carbohydrate x 4)

Calories = 32 + 90 + 88

Calories = 210 kcal

Therefore, in a portion of food that contains 8 g protein, 10 g fat, and 22 g carbohydrate there are 210 kilocalories.

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