which one of the following salts when dissolved in water produces the lowest ph?A. kbr B. kf C. kclD. ki

The molarity of a 97.62 (m/m) % acetic acid solution given that the solution density is 1.05 g/ml is 17.5M.

Reason:

Glacial acetic acid is 100% acetic acid. The MW of acetic acid is 60. The density of acetic acid (100%) is 1.05. So in 1 L we have 1.05 Kg. The number of moles of acetic acid is then 1050 g divided by 60 = 17.5 mol. So the molarity is 17.5 mold/L or 17.5 M.

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Answer:

I think it was a huge fish. umm not sure

Explanation:

The work done by Henry can be calculated by multiplying the weight of the box (500 N) with the distance it was lifted (0.75 m). Thus, the work done is 375 J (Joules).(D)

In physics, work is defined as the energy transferred when a force is applied to move an object through a distance. The unit of work is Joule, which is the same as Newton-meter. In this question, Henry lifted the box with a force equal to its weight, and the box was lifted through a distance of 0.75 m.

Therefore, Henry did work on the box by transferring 375 J of energy to it. This work is equal to the potential energy gained by the box due to its vertical displacement. The time taken (1.5 seconds) is not relevant to the calculation of work.

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1.63 M

Math

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Chemistry

Unit 0

Aqueous Solutions

Step 1: Define

1.43 mol NaCl (sodium chloride)

0.875 L solution

Step 2: Find M

Step 3: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.63429 M ≈ 1.63 M

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual density = 8.96 g/mL

error = 8.96 - 8.86 = 0.1

We have

\(p(\%) = \frac{0.1}{8.96} \times 100 \\ = 1.1160714...\)

We have the final answer as

Hope this helps you

Answer:

Running water makes rock edges very dull because of erosion.

Explanation:

hope this helps  ^_^

413000 grams thats the answer hope that helps ;]

Answer:

4NO + 6H2O = 4NH3 + 5O2

Explanation:

Think about it this way: there are 4N's 4O's and 12H's and 10O's on both sides that's what makes it balanced

Hope this helps :)

Bonding electrons are involved in the formation of chemical bonds, whereas lone pair electrons are not involved in bond formation and occupy atomic orbitals.

Bonding electrons are electrons that are involved in forming chemical bonds between atoms. In covalent bonds, atoms share electrons to achieve a full outer electron shell and attain stability. The number of bonding electrons is determined by the electron configuration of the atoms involved in the bond and their relative electronegativities.

Lone pair electrons, on the other hand, are non-bonding electrons that are not involved in forming chemical bonds. These electrons are found in the outermost electron shell of an atom and can be thought of as "unpaired" electrons. Lone pair electrons occupy atomic orbitals and do not participate in bond formation. Instead, they have a significant impact on molecular shape and reactivity due to their repulsive forces.

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The measure of the energy in any EM waves is electron volts (eV).

The Electromagnetic waves (EM waves) are the waves that are made up of both electric and magnetic fields that oscillates around a field.

The electromagnetic wave can be measured in electron volts (eV) because is can be described in terms of its energy—in units of measure.

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Use the van der Waals equation and the ideal gas equation to calculate the volume of 1.000 mol of neon at a pressure of 500.0 atm and a temperature of 355.0 K.

The Van der Waals equation, also known as the Van der Waals equation of state, is an equation of state used in chemistry and thermodynamics that extends the ideal gas law to take into account the effects of molecular interaction as well as the finite size of the molecules in a gas.

We may build a new equation that better reflects real gas behavior by modifying the ideal gas law to include corrections for interparticle attractions and particle volumes. The van der Waals equation can be used to determine a gas's properties under less-than-ideal circumstances.

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Answer:

C 1:1

Explanation:

Hydrogen loses an electron to becone +1 which is a cation and flourine gains that electron to have a full outer shell on the 2p subshell to become -1 and is an anion so the ratio is 1:1.

Panch Tattva refers to the five basic elements of nature - earth, water, air, fire, and space. To write a project report on this topic, you can follow the below-mentioned steps:

Introduction - Begin your report by introducing the concept of Panch Tattva and its importance in Hinduism and other religions.

Earth - Describe the element earth and its significance. Discuss the properties, uses, and importance of earth in our daily lives.

Water - Discuss the element water and its significance. Describe the properties, uses, and importance of water in our daily lives.

Air - Discuss the element air and its significance. Describe the properties, uses, and importance of air in our daily lives.

Fire - Discuss the element fire and its significance. Describe the properties, uses, and importance of fire in our daily lives.

Space - Discuss the element space and its significance. Describe the properties, uses, and importance of space in our daily lives.

Conclusion - Summarize the importance of Panch Tattva and its relevance in our daily lives.

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Answer:

B) They will react because X and Y can share two pairs of electrons to become stable

Explanation:

The electron configurations of two elements x and y are given :

X: 1s2 2s2 2p6

Y: 1s2 2s2 2p6 3s2 3p6

The statement that is true for both the elements is that, they both will react as they both can share two pairs of electrons to become stable.

To become stable the outermost shell or p orbital should have 8 electrons, so element X  can gain 2 atoms to become stable.

Element Y can also react as it can also share two atoms to fulfill its 3p orbital and will stable.

Hence, the correct option is "B".

In this compound, the proportion of carbon atoms to oxygen atoms is 12: 11.

What distinguishes an atom of carbon as such?

The nucleus of a carbon atom is made up of six protons and six neutrons, and it is encased in six electrons. According to quantum physics, the first two electrons must occupy the innermost atomic orbital, while the wavefunctions of the following four electrons only partially fill the second standard and three second principal orbitals.

How are atoms located in a compound?

Calculate the element's molar mass using the periodic table. To determine the atoms, the number of moles, divide the given mass in grams by the molar mass. To get the number of atoms, multiply the number of moles by Avogadro's number.

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Answer: The distribution of natural resources depends upon many physical factors like land, climate and altitude. The distribution of resources is unequal because these factors differ from place to place on this earth.

Many physical factors, such as land, climate, and altitude, influence the distribution of natural resources. Because these factors differ from place to place on this planet, the distribution of resources is unequal.

The Earth's surface is defined as the part of the water or land that comes into contact with the air above it. The surface is the part of the Earth with which we interact. The crust is the rock layer that surrounds the Earth's mantle. The crust encircles the entire planet, including the ocean floor.

The crust is the planet's surface, where we live; it's actually a very thin layer, only 70 kilometers thick at its thickest point.

Petroleum is formed by the same geological process that creates sedimentary rock. The geological processes that create rocks and natural resources such as granite and copper do not occur everywhere on Earth and take a long time to form. This explains why granite and copper aren't found everywhere on the planet.

Thus, Because these factors differ from place to place on this planet, the distribution of resources is unequal.

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The addition of sodium hydroxide and NaC₂H₃O₂ to water produces a buffer solution. Option a is correct.

A buffer solution is a solution that resists changes in pH when small amounts of an acid or a base are added to it. It contains a weak acid and its conjugate base (or a weak base and its conjugate acid) in approximately equal concentrations.

When sodium hydroxide (NaOH) is added to water, it dissociates completely to form hydroxide ions (OH⁻) and sodium ions (Na⁺):

NaOH → Na⁺ + OH⁻

When sodium acetate (NaC₂H₃O₂) is added to water, it also dissociates, but only partially, to form acetate ions (C₂H₃O₂⁻) and sodium ions (Na⁺):

NaC₂H₃O₂ → Na⁺ + C₂H₃O₂⁻

The acetate ion acts as a weak base and can react with the hydroxide ion to form water and acetate hydroxide:

C₂H₃O₂⁻ + OH⁻ → HC₂H₃O₂ + H₂O

The weak acid, HC₂H₃O₂, formed by this reaction, can react with additional hydroxide ion to reform acetate ion and water:

HC₂H₃O₂ + OH⁻ → C₂H₃O₂⁻ + H₂O

Thus, the solution contains both the weak acid (HC₂H₃O₂) and its conjugate base (C₂H₃O₂⁻), which together act as a buffer and help to resist changes in pH when small amounts of an acid or a base are added to the solution. Option a is correct.

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Answer:

Explanation:

The number of atoms of potassium can be found by using the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 1.65 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Answer:

K°(g)* + 419 Kj/mole => K⁺(g) + e⁻

Explanation:

1st ionization step for potassium is the ionization of the 4s¹ electron. This requires 419 Kj/mole energy (endothermic). The reaction equation is ...

K°(g)* + 419 Kj/mole => K⁺(g) + e⁻

*note: Ionization of group IA metals requires they be in gas phase. That is, as shown by the Born-Haber Cycle** for formation of ionic compounds ...

K°(s) + 89.24 Kj/mole => K°(g); then ...

K°(g) + 419 Kj/mole => K⁺(g).

**Recommend review of Born-Haber cycle for formation of ionic compounds.

Answer:

B is the right answer

carbohydrates are not found inside the cytoplasm so therefore it is B

Answer:

D

Explanation:

The cytoplasm is composed of water, salt and some organic molecules. (e.g. carbohydrates)

You would need to weigh out \(875 grams\) of sodium carbonate to make \(2.5 kg\) of a \(35.0\%\) (w/w) solution.


First, convert \(35.0\%\) to a decimal by dividing it by \(100\):

\(35.0/100 = 0.35\)

Then, multiply the decimal by the total weight (\(2.5 kg\)) to find the grams of sodium carbonate:

\(0.35 * 2.5 kg = 0.875 kg\)

Next, we need to convert the kilogram (\(kg\)) measurement to grams (\(g\)) since the question asks for the amount in grams.

Since \(1 kg\) is equal to \(1000 g\), we can multiply the amount in \(kg\) by \(1000\):

\(0.875 kg * 1000 g/kg = 875 g\)

Therefore, you would need to weigh out \(875 grams\) of sodium carbonate to make \(2.5 kg\) of a \(35.0\%\) (w/w) solution.

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A ceiling level is a level that is not to be exceeded at any time.

A ceiling level refers to the maximum concentration of a substance that should never be surpassed in the given environment, such as a workplace or laboratory, to ensure safety and prevent any harmful effects.This indicates that regardless of the length of time, a worker exposed to a concentration greater than the CEV may experience health impacts. This exposure cap is closely adhered to for chemicals and biological agents that might have long-term negative impacts on health.

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Answer: B. above a bowl of ice water

Explanation: I got this right on Edmentum.

Answer:

1.8095

Explanation:

3x3x7=63=volume

114 = mass

114=dividend

63 = divisor

Divide using long divison

The approximate volume of reaction solution used in the experiments described in the passage was 500 μL.

Experiments are scientific procedures used to test hypotheses and evaluate theories. They involve manipulating one or more variables and measuring the outcome, allowing scientists to observe cause and effect relationships between the variables. Experiments are often conducted in controlled environments, such as laboratories, in order to ensure that the results are accurate and reproducible. Experiments are the cornerstone of scientific inquiry, allowing us to gain new knowledge and insights about the natural world.

This is because 0.5 mg of MgCl2 was added to the reaction mixture, and 1 mg of MgCl2 is equivalent to 2.3 μL of MgCl2. Therefore, the 0.5 mg of MgCl2 added to the reaction mixture is equivalent to 1.15 μL. Multiplying this by the dilution factor of 435, the approximate volume of reaction solution used in the experiments is 500 μL.

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The factor that limits the number of conformations a polypeptide can have is (A) the planar structure of the peptide bond.

A polypeptide is a long chain of amino acids that are linked together through peptide bonds to form a protein. A conformation refers to the specific three-dimensional shape that a protein can take, and there are a finite number of possible conformations that a polypeptide can adopt.

The peptide bond is the chemical bond that links the amino acids together to form the polypeptide chain. This bond has a planar structure, which means that it is rigid and does not allow free rotation of the atoms around the bond. The planar structure of the peptide bond imposes constraints on the possible orientations of the amino acid side chains and limits the number of conformations that the polypeptide can adopt.

In addition to the planar structure of the peptide bond, other factors that can limit the number of conformations a polypeptide can have include the presence of disulfide bonds, which can lock certain regions of the polypeptide into a specific conformation, and the hydrophobic and hydrophilic interactions between amino acids, which can drive the folding of the polypeptide into specific structures.

In conclusion, the number of conformations a polypeptide can have is limited by the planar structure of the peptide bond, which imposes constraints on the possible orientations of the amino acid side chains and restricts the number of possible conformations that the polypeptide can adopt.

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Explanation:

Since [H+] [OH-] =10^(-14)

[H+] = (10^-14) / (1.4×10^-10)

It is true that the  principles used in handling a Hazardous Material (HazMat) does apply to  Chemical, Biological, Radiological, Nuclear, and Explosive (CBRNE) incidents.

The term hazardous chemicals refers to those substances that are able to cause harm to fauna and flora.

Thus, It is true that principles used in handling a Hazardous Material (HazMat) does apply to  Chemical, Biological, Radiological, Nuclear, and Explosive (CBRNE) incidents.

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The pressure of the container when it warms up to room temperature of 25°C will be 181.99 mmHg.

Calculation of pressure:

Combined gas law can be used to solve this question, which relates initial and final states of pressure, volume, and temperature for a gas. The formula is:

P₁ * V₁ / T₁ = P₂ * V₂ / T₂

where; P₁ is the initial pressure, V₁ is the initial volume, T₁ is the initial temperature, P₂ is the final pressure, V₂ is the final volume, and T₂ is the final temperature.

We are given the initial pressure (P₁) as 47 mmHg and the initial temperature (T₁) as 77 K. We are also given the final temperature (T₂) as 25°C, which we need to convert to Kelvin by adding 273.15:

T₂ = 25°C + 273.15 = 298.15 K

Since the volume of the container remains constant, V₁ and V₂ will cancel out in the equation:

P₁ / T₁ = P₂ / T₂

Now, we can solve for P₂, the final pressure:

P₂ = (P₁ * T₂) / T₁
P₂ = (47 mmHg * 298.15 K) / 77 K

P₂ ≈ 181.99 mmHg

So, final pressure will be 181.99 mmHg.

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