arrange the following compounds in order of decreasing reactivity towards electrophilic aromatic substitution. chegg

Since [X]² and [Y]² both have units of M², the rate constant (k) must have units of 1/s in order to cancel out the M² units of the concentration terms. Therefore, the correct answer is: B) 1 M²/s

In the given rate law equation, Rate = k[X]²[Y]², the units of the rate constant (k) can be determined by examining the exponents of the concentration terms in the rate law.

Let's analyze the units of each term in the rate law equation:

Rate: The rate of the reaction is expressed in units of concentration per unit time. For example, it could be in mol/(L·s) or M/s, where M represents molarity (mol/L).

[X]: The concentration of species X is expressed in units of molarity (M), which represents the amount of X per unit volume (usually in liters).

[Y]: Similarly, the concentration of species Y is also expressed in units of molarity (M).

Now, let's determine the units of the rate constant (k) by looking at the exponents of [X] and [Y] in the rate law equation:

Rate = k[X]²[Y]²

The rate has units of M/s, which means that the units on the left side of the equation must be consistent with the units on the right side.

From the rate law equation, we can see that [X]² and [Y]² are multiplied by each other. This indicates that the rate constant (k) must have units that cancel out the units of [X]² and [Y]² to yield the units of the rate (M/s).

The units of the rate constant (k) in the given rate law equation are 1 M²/s. This means that for every combination of concentrations of [X] and [Y], the rate constant has units of M²/s to give the rate in M/s.

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To obtain the equivalency point, a student titrates 50.0 mL of an unknown HI concentration with 85 mL of a 1.0 M solution of NaOH. The pH of the HI solution is 0.54.

To determine the pH of the HI solution, we need to first determine the number of moles of NaOH used to reach the equivalence point. At the equivalence point, the number of moles of NaOH is equal to the number of moles of HI.

We can use the following equation to calculate the number of moles of NaOH used:

moles of NaOH = molarity × volume (in liters)

moles of NaOH = 1.0 M × 0.085 L = 0.085 moles

Since the number of moles of NaOH is equal to the number of moles of HI at the equivalence point, we can calculate the concentration of HI:

The concentration of HI = moles of HI/volume of HI (in liters)

volume of HI = 50.0 mL = 0.050 L

moles of HI = 0.085 moles

concentration of HI = 0.085 moles / 0.050 L = 1.70 M

Now we can use the dissociation reaction of HI to calculate the pH of the solution:

HI + NaOH → NaI + \(H_{2}O\)

At the equivalence point, all the HI has been neutralized by NaOH, so the concentration of HI is zero. Therefore, the concentration of I- is equal to the concentration of NaOH used:

concentration of I- = 1.0 M × 0.085 L = 0.085 M

Now we can use the equation for the dissociation of HI to calculate the concentration of H+:

HI → H+ + I-

\(K_w &= [\text{H}^+][\text{OH}^-] = 1.0 \times 10^{-14}\)

\([\text{OH}^-] &= \frac{1.0 \times 10^{-14}}{[\text{H}^+]}\)

\(0.085 \ \text{M} &= \frac{[\text{H}^+][\text{I}^-]}{1.70 \ \text{M}}\)

\([\text{H}^+] &= \frac{(0.085 \ \text{M} \times 1.70 \ \text{M})}{0.050 \ \text{L}} = 2.89 \ \text{M}\)

\([\text{OH}^-] &= \frac{1.0 \times 10^{-14}}{2.89 \ \text{M}} = 3.46 \times 10^{-15}\)

\(\text{pH} &= -\log{[\text{H}^+]} = -\log(2.89) = 0.54\)

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The inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.

The inflation rate from 2014 to 2015, assuming that 2014 is the base year, can be determined using the Consumer Price Index (CPI). The CPI measures the cost of goods and services over time and is used to calculate inflation. The formula for calculating inflation rate using CPI is as follows: Inflation rate = ((CPI year 2 - CPI year 1) / CPI year 1) x 100To solve this problem, we first need to calculate the CPI for each year using the prices and quantities of nuts and meat.

Calculating CPI for 2014:CPI 2014 = (300 x $9) + (175 x $19) = $5,625 Calculating CPI for 2015:CPI 2015 = (420 x $9) + (340 x $14) = $9,460Using the CPI formula, we can calculate the inflation rate from 2014 to 2015:Inflation rate = ((CPI 2015 - CPI 2014) / CPI 2014) x 100= (($9,460 - $5,625) / $5,625) x 100= $3,835 / $5,625 x 100= 68.09% (to 2 decimal places) Therefore, the inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.

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Answer: False

Explanation:

false

The total flux through the enclosed surface is zero N⋅m²/C.

When determining the total flux through an enclosed surface, we need to consider the electric field created by each charge and their respective contributions. In this scenario, there are three charges: q₁ = 9q, q₂ = -4q, and q₃ = -q, where q = 3.0 μC.

The electric flux through a closed surface is given by the formula Φ = ∮E · dA, where E represents the electric field and dA is a differential area vector perpendicular to the surface. The integral represents the sum of the dot product between the electric field and the differential area vector over the entire surface.

In this case, the charges are located outside the enclosed surface, and the electric field due to each charge will intersect the surface at different angles. The flux through a closed surface depends on the net electric field passing through it.

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3.14159, this is π

Followed by 2-6-5-3-5-8-9

Circumference over diameter

7-9, then 3-2-3

OMG! Can't you see?

8-4-6-2-6-4-3

And now we're on a spree

38 and 32, now we're blue

Oh, who knew?

7, 950 and then a two

88 and 41, so much fun

Now a run

9-7-1-6-9-3-9-9

Then 3-7, 51

Half way done!

0-5-8, now don't be late

2-0-9, where's the wine?

7-4, it's on the floor

Then 9-4-4-5-9

2-3-0, we gotta go

7-8, we can't wait

1-6-4-0-6-2-8

We're almost near the end, keep going

62, we're getting through

0-8-9-9, on time

8-6-2-8-0-3-4

There's only a few more!

8-2, then 5-3

42, 11, 7-0 and 67

We're done! Was that fun?

Answer:

In thes structure of PO43- there are a total of 32 valence electrons. For the structure for PO4 3- you should take formal charges into account to find the best  structure for the molecule. Remember, PO4 3- has a negative three charge on the molecule.

Explanation:

Catalysts speed up chemical reactions / changes.

Hope this helps!

Answer:

Atmospheric Pressure :)

Explanation:

Use a conversion factor to figure this out.

\(=99.47\ kPa\) × \(\frac{1\ atm}{101.325\ kPa}\)

= 0.9816925734 atm (round as you wish)

Answer:

Human exhale

Explanation:

When humans exhale-carbon is that which all humans produce=18% of all carbon output

the critical temperature is, the temperature above which a gas cannot be liquefied.

The greatest temperature at which a substance may exist as a liquid is known as the temperature of the substance.The substance at question (in its vapour or gaseous state) cannot be liquefied at temperatures higher than the critical temperature, no matter how much pressure is applied.

The evaporation critical point is the highest or lowest temperature and pressure at which the state of the substance could be changed.

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Answer:

Low pressure

Explanation:

Hurricanes are powerhouse weather events that suck heat from tropical waters to fuel their fury. These violent storms form over the ocean, often beginning as a tropical wave a low pressure area that moves through the moisture-rich tropics, possibly enhancing shower and thunderstorm activity.

The correct options are:1.

Conditional probability that the selected compound actually has an impurity is 0.74.2.

Conditional probability that the selected compound is actually free of an impurity is 0.0185.3.

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

Here, we need to find out the probability that a selected compound has an impurity given that the test indicates an impurity is present.

P(A) = probability that a compound has impurity = 0.15

P(B) = probability that the test indicates an impurity is present

= 0.15 x 0.9 + 0.85 x 0.05

= 0.14 + 0.0425

= 0.1825P

(B|A) = probability that the test indicates an impurity is present given that the compound has impurity = 0.9

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / P(B)

         = 0.9 * 0.15 / 0.1825

         = 0.7370

         ≈ 0.74

Conditional probability that the selected compound actually has an impurity is 0.74.10.

Here, we need to find out the probability that a selected compound is actually free of an impurity given that the test indicates an impurity is not present.

P(A) = probability that a compound has impurity = 0.15

P(B) = probability that the test indicates an impurity is not present = 0.85 x 0.95 + 0.15 x 0.1 = 0.8075

P(B|A) = probability that the test indicates an impurity is not present given that the compound has impurity

          = 0.1

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / P(B)

          = 0.1 * 0.15 / 0.8075

          = 0.0185

Conditional probability that the selected compound is actually free of an impurity is 0.0185.11.

Here, we need to find out the probability that the selected roll is from Process I given that it is defective.

Let A denote the event that a roll is from Process I and B denote the event that a roll is defective.

Then, we need to find out P(A|B).

P(A) = probability that a roll is from Process I = 0.6

P(B|A) = probability that a roll is defective given that it is from Process I = 0.03

P(B|A') = probability that a roll is defective given that it is from Process II = 0.01

P(A'|B) = probability that a roll is from Process II given that it is defective

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / [P(B|A) * P(A) + P(B|A') * P(A')]

= 0.03 * 0.6 / (0.03 * 0.6 + 0.01 * 0.4)

= 0.6429

≈ 0.64

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

Hence, the correct options are:1.

Conditional probability that the selected compound actually has an impurity is 0.74.2.

Conditional probability that the selected compound is actually free of an impurity is 0.0185.3.

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

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Answer:

Subatomic particles are the proton (1 amu), neutron (1 amu), and electron (0 amu)

Explanation:

Atomic mass unit (amu; dalton): A unit of mass equal to exactly 1/12 the mass of one 12C atom, or 1.660538921 x 10−27 kg. This is the approximate mass of one proton or one neutron. It is the basis of atomic weights.

Answer:

\(\boxed{\mathrm{see \: below}}\)

Explanation:

Protons have a mass of 1 amu (atomic mass unit).

Electrons have a mass of \(\frac{1}{1840}\) amu (atomic mass unit).

Neutrons have a mass of 1 amu (atomic mass unit).

Based on the data provided, the (a) Mass of H2 produced = 1.0742 g ; (b)  mass of zinc reacted = -35.106 g ; (c)  percentage of zinc (by mass) in the alloy = 2918.6%

a) The chemical reaction between zinc and hydrochloric acid is : Zn(s) + 2HCl(aq) → H2(g) + ZnCl2(aq)

Zinc reacts with hydrochloric acid to produce hydrogen gas. To find the amount of hydrogen gas produced, we'll have to convert the mass of zinc that reacted into moles and use the mole ratio between zinc and hydrogen gas.

Mass of zinc = Mass of brass - Mass of remaining solution

= 1.203 g - 36.309 g= -35.106 g (negative sign shows that we have less mass now)

Molar mass of Zn = 65.38 g/mol

Moles of Zn = Mass / Molar mass= 35.106 g / 65.38 g/mol= 0.5371 mol

The mole ratio between Zn and H2 is 1:1 (from the balanced chemical equation).

Therefore, moles of H2 produced = 0.5371 mol.

Molar mass of H2 = 2 g/mol

Mass of H2 produced = Moles of H2 × Molar mass of H2

= 0.5371 mol × 2 g/mol

= 1.0742 g

b) To calculate the mass of zinc that reacted with hydrochloric acid, we already have the mass of zinc and the mass of brass. We'll just subtract the mass of the remaining solution from the mass of brass.

Therefore, Mass of zinc reacted = Mass of brass - Mass of remaining solution

= 1.203 g - 36.309 g = -35.106 g (negative sign shows that we have less mass now)

c) We have already calculated the mass of zinc reacted which is 35.106 g. Now we need to find the percentage of zinc (by mass) in the alloy. We'll use the following formula :

Percentage of zinc (by mass) = Mass of zinc / Mass of brass × 100

Mass of brass is given as 1.203 g.

Mass of zinc is already calculated as 35.106 g.

Using the above formula :

Percentage of zinc (by mass) = 35.106 g / 1.203 g × 100 = 2918.6% (approximately)

Therefore, the percentage of zinc (by mass) in the alloy is 2918.6%.

Thus, the correct answers are : (a) 1.0742 g ; (b) -35.106 g ; (c) 2918.6%

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Answer:

The number 94.38 × 10² in scientific notation is:

9.438 × 10³

Coefficient: 9.438

Exponent: 3

Explanation:

The number 94.38 × 10² in scientific notation is:

9.438 × 10³

Coefficient: 9.438

Exponent: 3

To convert 94.38 × 10² into scientific notation, move the decimal point to the right and raise 10 to the appropriate exponent.

To convert the number 94.38 × 10² into scientific notation, we need to move the decimal point to the right so that there is one non-zero digit to the left of the decimal point. In this case, we will move the decimal point two places to the right, resulting in a coefficient of 0.9438.

Since we moved the decimal point two places to the right, we need to raise 10 to the power of 2, or 10². Therefore, the exponent will be 2.

The correct scientific notation is 0.9438 × 10². The coefficient is 0.9438 and the exponent is 2.

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Student has a sample of copper (I) sulfate hydrate, then the percent of water in the sample is 40%.

In chemistry, a hydrate is a compound that contains water molecules that are chemically bound to the atoms or ions of the compound.

Mass of the anhydrous salt is given as 12 grams.

So, mass of water = total mass - mass of anhydrous salt

mass of water = 20 g - 12 g

mass of water = 8 g

Now, % water = (mass of water ÷ total mass) × 100

% water = (8 g ÷ 20 g) × 100

% water = 40%

Therefore, the percent of water in the sample is 40%.

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2.508 J of heat is required to raise the temperature of 10.0 g of water from 20 C to 80 C.

Thus, The specific heat capacity of water is 4.187 kJ/kgK, that of ice is 2.108 kJ/kgK, and that of water vapor (steam) is 1.996 kJ/kgK.

This measure of heat required to raise the temperature of a certain substance in a particular state by one degree Celsius.

The amount of heat per unit mass needed to increase the temperature by one degree Celsius or Kelvin is known as the specific heat. The amount of material has no bearing on this quantity.

Ice, water, and steam are substances that represent the several states of matter; specifically, ice stands in for the solid state, water for the liquid state, and steam for the gas state.

Thus, 2.508 J of heat is required to raise the temperature of 10.0 g of water from 20 C to 80 C.

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A substance composed of atoms of more than one element that are held together by chemical bonds is called a compound. Therefore the correct option is option A.

A compound is a pure material that is created by chemically combining two or more distinct components in a specific order. Chemical bonds, which can be ionic or covalent, hold the atoms of a substance together.

The characteristics of compounds are distinct from the characteristics of the constituent parts.

For instance, sodium is a soft metal and chlorine is a greenish-yellow gas; nevertheless, when these two elements combine to produce sodium chloride (table salt), they create a white crystalline solid that is far more stable than the constituent parts of each element alone. Therefore the correct option is option A.

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The amount of heat needed to increase the temperature of a metal's unit mass by one degree is known as its specific heat.

Thus, It is a measurement of the thermal energy storage capacity of the metal molecules at the molecular level and specific heat.

The atomic structure of the metal, its atomic weight, temperature, phase, and impurities are only a few of the variables that have an impact on this number and Specific heat.

Every metal has a different specific heat. It is possible for metals with the same elemental structure to have varying values. The atomic structure, mass, temperature, and presence of impurities in the metal, among other things, all have an impact on the specific heat value in specific heat.

Thus, The amount of heat needed to increase the temperature of a metal's unit mass by one degree is known as its specific heat.

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Answer:

发你如果热客人看看如果

Explanation:

Answer:

result = 310

significant figures =  2

Explanation:

How to round significant figures:

look the first non-zero digit if rounding to one significant figure, look the digit after the first non-zero digit if rounding to two significant figures. draw a vertical line after the place value digit that is required.look at the next digit.

result = 310

significant figures = 2

its conduction

Hopeit helps)❤❤

Let me know if ther is an error in my answer

Answer:

You can see in the above illustration of the periodic table that N is in Period 4, Group 5A, and p-block. Before reaching N, you will pass through the atomic orbitals 1s, 2s, and 2p. The electron configuration of N3- is N3-: 1s22s22p6 .

Explanation:

Answer:

1. Crush the sugar into powder.

2. Heat the water.

3. Dissolve it by stirring continuously

Explanation:

1. Crushing the sugar into powder increases surface area. So it increases the changes of dissolving

2. Heating the water increases the capacity of water to dissolve sugar.

3. Stirring continuously increases randomness of particles so eases mixing up thus increasing dissolving tendency.

The plant's glucose, C6H12O6, will include the 18O-radiolabeled CO2 when enough time has passed for photosynthesis. Option D

Green plants use the power of sunshine to produce their nourishment via a process called photosynthesis.

In the process of photosynthesis, plants use the energy of the sun to drive chemical processes that transform atmospheric carbon dioxide, or CO2, and water vapor into glucose.

Taking into account the provided research:

In an illuminated room with 18O-radiolabeled CO2, a researcher cultivated a plant.

The 18O-radiolabeled CO2 will be absorbed into the glucose the plant produces during photosynthesis when enough time has passed for photosynthesis.

After being generated, glucose is subsequently stored as starch.

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Complete question:

A researcher grew a plant in an illuminated chamber with ¹⁸O-radiolabeled CO₂. After allowing time for photosynthesis, where will the radiolabeled ¹⁸O be found?

A. O₂ in the chamber

B. H₂O in the plant

C. H₂O vapor in the chamber

D. C₆H₁₂O₆ in the plant

Answer:

So the total mass is 50 plus 150 grams the heat capacity 4.18 joules per gram per degree C. And the temperature change is 36 minus 25 and so we can calculate Delta H for the reaction that takes place.

Explanation: