Rank the following structures in order of decreasing electrophilic strength.

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Answer 1

Answer:

Electrophiles are positively charged or neutral species having empty orbitals that are attracted to an electron rich center. Examples of these are the Bronsted acid. Bronsted acid accepts an electron pair for hydrogen.

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Based on enthalpy of formation data species ∆H◦ f H2S(g) −20.63 kJ/mol O2(g) 0 kJ/mol H2O(ℓ) −285.83 kJ/mol SO2(g) −296.83 kJ/mol calculate ∆Hrxn for 2 H2O(ℓ) + 2 SO2(g) ←→ 2 H2S(g) + 3 O2(g) 1. 562 kJ · mol−1 2. −562 kJ · mol−1 3. −1124 kJ · mol−1 4. 1124 kJ · mol−1
GUYS HELP ME PLEASE. MY TEACHER IS GONNA KILL ME IF I DONT SOLVE THIS RIGHT. Write the election configuration (H, Al, S,CI, Ni)
Describe the motion of a ball being thrown straight up in the air in terms of kinetic and potential energy. as the ball rises up and falls back down, how is its kinectic and potential energy affected?
An ionic solid is placed in a beaker of water. Which of the following occurs when there is a strong attraction between the solute and the solvent?A. The solute melts.B. The solute dissolves.C. The solute remains intact.D. The solute reacts to form a precipitate.

Which of the following reactions show a decrease in entropy? a. CaO(s) + H2O(l) Ca(OH)2 (s) b. 2H2O (l) 2 H2 (g) + O2 (g) c. H2CO3 (aq) CO2 (g) + H2O (l) d. 2KClO3 (s) 3O2 (g) + 2KCl (s)

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The correct answer is a. CaO(s) + H2O(l) Ca(OH)2 (s)
Decreasing in entropy means that you have to get a solid from the liquid
therefore : CaO(s) + H2O(l) Ca(OH)2 (s)
This formula will make it absolutely clear
$(g) -\ \textgreater \ (l) -\ \textgreater \ (s) more molecules -\ \textgreater \ less molecules$

Answer: The correct answer is Option a.

Explanation:

Entropy is defined as the measurement of randomness in a system.

Entropy increases as we move from solid state to liquid state to gaseous state and it decreases as we move from gaseous state to liquid state to solid state.

From the options above:

Option a: $CaO(s)+H_2O(l)\rightarrow Ca(OH)_2(s)$

Entropy is getting decreased because liquid reactants are changing its state to solid state.

Option b: $2H_2O(l)\rightarrow 2H_2(g)+O_2(g)$

In this reaction, entropy is increasing because the state is changing from liquid to gaseous state.

Option c: $H_2CO_3(aq.)\rightarrow CO_2(g)+H_2O(l)$

In this reaction, entropy is increasing because the state is changing from liquid to gaseous state.

Option d: $2KClO_3(s)\rightarrow 3O_2(g)+2KCl(s)$

In this reaction, entropy is increasing because the state is changing from solid to gaseous state.

Hence, the correct answer is Option a.

Identify which one of these are exact numbers. (Can be more than 1) a. 2.54 cm ( the number of centimeters in exactly 1 in)
b. 56.00 s ( a time measured by a stopwatch)
c. 4 choices ( the number of choices in this list)
d. 3 lbs ( the weight of an object measured on a scale )

Answers

Answer: a. 2.54 cm ( the number of centimeters in exactly 1 in) and c. 4 choices ( the number of choices in this list)

Justification:

1) a. 2.54 cm ( the number of centimeters in exactly 1 in)

Although the exact length of one inch has varied in the past, currently the inch is defined as exactly 2.54 cm, so this is an exact number.

b. 56.00 s ( a time measured by a stopwatch)

The time measured by a stopwatch is not an exact number. The number is limited by the precision of the instrument (the stopwatch) and it migh have been 56.004 instead of 56.00, and the stopwatch cannot shoe that. So, this is not an exact number.

c. 4 choices ( the number of choices in this list)

This is, indeed an exact number. It is 4, not 4.1, nor 3.9, nor any other number.

d. 3 lbs ( the weight of an object measured on a scale )

As reasoned with the stopwatch, this measure, 3 lbs, is subject to the precision of the scale. It is not an exact number. It could be other number close to 3: 2.99 for example.

These are exact numbers: c. 4 choices ( the number of choices in this list) and d. 3 lbs ( the weight of an object measured on a scale )

Further explanation

The exact number is a value that is known with complete certainty. Examples are counted numbers of objects or certain unit conversions such as exactly 3 feet in 1 yard. Another example is, a dozen is defined as 12 objects, and a pound is defined as 16 ounces.

Fraction an exact number is a fraction takes two integers and places them in a ratio, for example 3/4 or 10/15. A decimal can express the same numerical quantity, but it does so with a single number (like 0.75 or 0.66). So, the fraction makes the relationship among numbers clear in the way it is written.

While a decimal can express the same numerical quantity, but it does so with a single number (like 0.75 or 0.66).

a. 2.54 cm ( the number of centimeters in exactly 1 in) is decimal

b. 56.00 s ( a time measured by a stopwatch) is not exact numbers

c. 4 choices ( the number of choices in this list) is exact numbers

d. 3 lbs ( the weight of an object measured on a scale ) is exact numbers

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Learn more about exact number brainly.com/question/1847531

Answer details

Grade: 9

Subject: chemistry

Chapter: exact number

Keywords: exact number

What type of reaction is shown below? CH4 + 2O2?CO2 + 2H2O + heat

Answers

This is a "Exothermic Reaction."

I did the same test and this was the correct answer.

I hope this helps!

During the 1920s, the trial of Sacco and Vanzetti,the Palmer raids, and the revival of the Ku Klux
Klan demonstrate that
(1) nativist sentiments were on the rise
(2) cultural values were similar between urban
and rural Americans
(3) popular support for international involvement
was increasing
(4) public support for limiting immigration was
declining

Answers

The right answer for the question that is being asked and shown above is that: "(2) cultural values were similar between urban and rural Americans." During the 1920s, the trial of Sacco and Vanzetti, the Palmer raids, and the revival of the Ku Klux Klan demonstrate that cultural values were similar between urban and rural Americans

Which is a characteristic of mixtures? They are chemically bonded together. They can be classified as pure substances. They have fixed ratios between their components. They can be separated by physical processes.

Answers

the answer is d i just took the quiz

The statement "They can be separated by physical processes" is a characteristic of mixtures (option D)

What are mixtures?

Mixtures are physical combinations of two or more substances. The components of a mixture are not chemically bonded together, and they can be separated by physical processes such as filtration, distillation, and evaporation.

Pure substances, on the other hand, are made up of only one type of atom or molecule. They cannot be separated by physical processes.

Therefore, the correct answer is They can be separated by physical processes (option D)

Learn about mixtures here brainly.com/question/2331419

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Which hand is negatively charged? Ο Α. OB. Oc. OD.

Answers

Answer:

it would be OA that is negatively charged

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