[A solution has [H+] = 4.7 Ã 10-8 M. The pHof this solution isa. 6.67b. 6.01c. 7.33d. 9.80e. none of these

The reactivity toward electrophilic aromatic substitution increases with the density of electrons on the aromatic ring.

The majority of electrophiles are positively charged, contain an atom with a partial positive charge, or lack an element with an octet of electrons. Most interactions between electrophiles and nucleophiles take place in addition and substitution processes.

Because they lack an electron, electrophiles can receive an electron pair from organisms that have an abundance of them. Examples include carbonyl compounds and carbocations. A nucleophile is a species that has an abundance of electrons and gives electron pairs to species that lack electrons. Carbanions, water, ammonia, cyanide ions, and others are examples.

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Answer:

10CO²+4H²O

Explanation:

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Answer:

The mole fraction of benzene and toluene in solution containing mole fraction of benzene and toluene in solution containing is 45.9%

Explanation:

don't worry

its is correct!

By you haven't provided the ratio of integration values or the specific chemical shifts for the signals in the 1H NMR spectrum of tert-butyl methyl ether. Please provide the necessary information so that I can assist you further.

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ANSWER

EXPLANATION

Firstly, we need to define the word titration.

Titration is defined as a technique that is used to determine the known concentration of an unknown solution.

This normally occurs between an acid and a base

During titration, an indicator changes color when equilibrium has been attained between the two solutions. The solutions are normally acid and base. At equilibrium, the number of moles of acid is equal to the number of base.

Therefore, the correct answer is option C

Answer:

A and D

Explanation:

It might seem like B and D but I took the test and it's A and D.

Answer:

Option A - nucleus

Explanation:

A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds.

Two atoms combine to form a molecule.

What is a molecule?

What is a nucleus?

What is a proton?

What is an electron?

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Answer:

I think that the first one is right(A)

Answer:

a) Melting: An example of melting in everyday life is when an ice cube placed on a warm surface starts to melt and turns into liquid water. Melting is the process in which a solid substance absorbs enough heat energy to transition into a liquid state. The heat energy breaks the bonds holding the particles of the solid together, causing them to gain enough kinetic energy to move more freely and transition to a liquid form.

b) Freezing: Freezing can be observed when water is placed in a freezer and transforms into ice. Freezing is the reverse process of melting. It occurs when a liquid substance loses heat energy and its particles slow down, leading to the formation of a solid structure. The decrease in temperature causes the particles to arrange themselves into an organized pattern, creating a solid state.

c) Condensation: When you see water droplets forming on the surface of a cold beverage on a hot day, that is an example of condensation. Condensation is the process by which a gas or vapor cools down and transforms into a liquid state. It happens when the temperature of the gas or vapor reaches a point where its particles lose enough energy to come together and form liquid droplets.

d) Evaporation: When wet clothes or a puddle of water dries up after exposure to sunlight or air, it is an example of evaporation. Evaporation is the process by which a liquid substance, such as water, turns into a gas or vapor. It occurs when the particles near the surface of the liquid gain enough energy from the surroundings to break free from the liquid phase and enter the gaseous phase.

e) Sublimation: An example of sublimation is the direct conversion of solid dry ice (frozen carbon dioxide) into a gas without passing through a liquid phase. Sublimation is the process in which a solid substance transforms directly into a gas without going through the intermediate liquid phase. It occurs when the substance absorbs enough heat energy to break the bonds between its particles, causing them to transition from a solid state to a gaseous state.

Explanation:

Answer:

Explanation:

hopes it help you a lot

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Answer:

I'm sorry, but I cannot see the observations or the data table you mentioned in your question. However, I can still provide you with some general guidance on how to approach the calculations and answer the questions based on the given information.

4. To calculate the concentration of the NaOH solution, you need to know the mass of NaOH used and the volume of the solution. The formula to calculate concentration is:

Concentration (in mol/L) = (Mass of NaOH (in grams) / molar mass of NaOH) / Volume of solution (in L)

Make sure to convert the mass of NaOH to moles by dividing it by the molar mass of NaOH. The molar mass of NaOH is the sum of the atomic masses of sodium (Na), oxygen (O), and hydrogen (H).

5. The balanced equation for the neutralization reaction between NaOH and HCl is:

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

(aq) represents an aqueous solution, and (l) represents a liquid.

6a. To calculate the average concentration of HCl in the sample from site B, you need to know the volumes and concentrations of the NaOH and HCl solutions used in the titration. Use the formula:

Concentration of HCl (in mol/L) = (Volume of NaOH solution (in L) * Concentration of NaOH (in mol/L)) / Volume of HCl solution (in L)

Multiply the volume of NaOH solution used by its concentration to find the amount of NaOH used. Then, divide this amount by the volume of HCl solution used to find the concentration of HCl.

6b. To determine the pH of the water at site B, you need to know the concentration of HCl from the previous calculation. The pH can be calculated using the formula:

pH = -log10[H+]

Since HCl is a strong acid, it dissociates completely into H+ ions. Therefore, the concentration of H+ ions is equal to the concentration of HCl. Take the negative logarithm (base 10) of the H+ concentration to find the pH.

To check if the water is safe, compare the calculated pH value to the range provided (pH 4.5-7.5). If the pH falls within this range, the water is considered safe for plant and animal reproduction in an aquatic environment.

6c. Use a similar calculation as in 6a to determine the average concentration of HCl in the sample from site C.

6d. Use the concentration of HCl from 6c to calculate the pH using the formula in 6b. Follow the same procedure to check if the water is safe based on the pH range.

7. To find the most current pH value for the Grand River, you can search for the latest data from reliable sources such as environmental agencies, research institutions, or government websites. Compare this pH value to the pH values obtained in the experiment to assess the difference between them.

Remember, without the specific data and observations, the calculations and comparisons provided here are only general guidelines. It's important to use the actual data from your experiment to obtain accurate results and conclusions.

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480.6 milliliters of 0.447 M KOH would be required to precipitate all of the Ca²⁺ ions in 141 mL of 0.761 M CaI₂.

To calculate the number of milliliters we need to determine the stoichiometric ratio between Ca²⁺ and OH⁻ ions in the reaction and use it to find the volume of KOH required.

The balanced chemical equation for the reaction can be written as:

\(Cal_{2} + 2 KOH - > Ca(OH)_{2} + 2 KI\)

First, let's calculate the number of moles of Ca²⁺ ions in 141 mL of 0.761 M CaI₂:

Moles of Ca²⁺ = (0.761 mol/L) * (0.141 L)

= 0.107301 mol

we need twice as many moles of KOH because the stoichiometric ratio is of CaI₂:KOH is 1:2.

Moles of KOH = 2 * 0.107301 mol

= 0.214602 mol

Now, we have to calculate the volume of 0.447 M KOH needed to provide 0.214602 amount of moles:

Volume of KOH = (0.214602 mol) / (0.447 mol/L)

= 0.4806 L

we need to convert L to mililiters as it is asked in the question:

Volume of KOH = 0.4806 L * 1000

= 480.6 mL

Therefore, number of milliliters of 0.447 m koh required to precipitate all of the ca2 ions in 141 ml of 0.761 m cai2 is 480.6 mL.

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The Maxwell-Boltzmann distributions is a description of the speeds of different gases at the same temperature.

The Maxwell-Boltzmann distributions is a description of the speeds of different gases at the same temperature. Recall that at the same temperature, the relative speed of gas molecules is described by the  Maxwell-Boltzmann distributions.

The question is incomplete hence we can not be able to show the exact relationship between the two graphs in order to arrive at a justification for the student's claim.

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Answer:

12 sodium, 4 phosphorus, 16 oxygen

Explanation:

4Na3PO4

Has (4X3) Na ,( 4X1) P ,(4X4) O

Answer:

12 sodium, 4 phosphorus, 16 oxygen

DDDDDDDDDDDDD

Explanation:

Answer

1.50 mol

Explanation

Given:

Initial volume, V₁ = 25.0 L

Mass of CH4 gas in 25.0 L container = 40 g

Final volume, V₂ = 15.0 L

From the Periodic Table; molar mass of CH4 = 16.04 g/mol

What to find:

The new amount in mole.

Step-by-step solution:

According to Avogadro’s law: For a confined gas, the volume (V) and number of moles (n) are directly proportional if the pressure and temperature both remain constant. That is:

n₁ = Mass/Molar mass = (40.0g/16.04 g/mol) = 2.493765586 mol

n₂ is the new amount in mole and can be calculated as follows:

The new amount in moles is 1.50 moles

Answer:

you would need to times the equation

Explanation:

Answer:

There are 5! goodluck,

Explanation:

Answer:

Sally would not be able to hear the impact of the meteor because sound waves cannot travel through the vacuum of outer space. In order for sound to be heard, it must vibrate through a medium such as air, water, or solid matter. Since there is no air or other medium in outer space, sound waves cannot transfer through it and cannot be heard. Hank, on the other hand, would be able to hear the impact of the meteor because he is inside the space shuttle, which provides a solid medium for the sound waves to vibrate through and be transferred to his ear drums.

Answer:

9 1/3  liters

Explanation:

N2 + O2 = 2 NO

Find mole weights from table of elements

N =14

O =~16       30 gm is a mole

22.4 l / mole for gases at STP

22.4 * 25/30 = 18 2/3 Liters  of NO  

   but since Nitrogen is N2 it will take 1/2 s much = 9 1/3

*** EDITED ***

According to the stoichiometry and STP conditions if  25.0 g of NO are produced 2269 liters  of nitrogen gas are used.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.1 mole of nitrogen gives 2 moles of NO, thus as per ideal gas equation which on substitution gives V=1×8.314×273/1=2269.722 liters.

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Answer:

hydrogen gas

The reaction of sodium and water produces hydrogen gas and heat, which is not a good combination! Sodium must be stored under mineral oil, or some other high-molecular weight hydrocarbon. Chlorine gas is toxic, and extremely irritating to the eyes and mucous membranes.✨

Explanation:

It is from a website.

Have a great time studying

Answer: aint no way you really put positive but anywya um on the benefits side, fracking increases economic activity, employment, income and housing prices. But, it also brings more truck traffic, increases in crime and potential health impacts possibly due to air and/or water pollution.

use his but put it in your own words

Explanation: yes

1-I can be a little more specific- we do NOT have enough evidence that fracking, as most induced earthquakes are not directly caused by hydraulic fracturing. Even though fracking can release many harmful gases such as methane, it cannot cause seismic waves

2-Research reveals that fracking increases regulated contaminants found in drinking water, but not enough to trigger regulatory violations. However, fracking can affect our underwater stores, mostly through the harmful gases like methane that can contaminate the water and have negative effects on people who drink it.

3- Because fracking releases a massive amount of harmful gases, the community can experience negative effects such as toxic air and health issues. (You should probably support the con sides as there are little reasons fracking is good)

4-Fracking has negative effects on the atmosphere. In fact, there are very little pros about fracking. It release harmful gases into the air, which can further increase the intoxication the air has.

5-Oil and gas development is primarily regulated under multiple federal environmental and public health laws. These laws apply to drilling and hydraulic fracturing from unconventional sources. However, fracking, despite its limitations, still affects the environment.

Answer:

Heat, in the form of thermal energy, naturally moves from warmer substances to colder ones. When the ocean is warmer than the atmosphere, it transfers heat — through conduction and radiation — to make the air warmer. ... This redistributes thermal energy and causes changes in the weather.

Answer:

C) LiOH + HCl → LiCl + H₂O

General Formulas and Concepts:

Chemistry - Reactions

Explanation:

Step 1: Define

RxN A:   2Na + 2H₂O → 2NaOH + H₂

RxN B:   CaCO₃ → CaO + CO₂

RxN C:   LiOH + HCl → LiCl + H₂O

RxN D:   CH₄ + 2O₂ → CO₂ + 2H₂O

Step 2: Identify

RxN A:   Single Replacement Reaction

RxN B:   Decomposition Reaction

RxN C:   Double Replacement Reaction

RxN D:   Combustion Reaction

Answer:

The answer for CIO- weak base ionization constant kb would be [HCIO][OH-]

__________

CIO-

Explanation:

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