if a buffer is composed of 27.83 ml of 0.226 m acetic acid and 32.77 ml of 0.168 m sodium acetate, how many ml of 0.100 m hcl can be added before the buffer capacity is reached?

Answer:

The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z). Hope This Helps

Explanation:

The Ka value for hypobromous acid (HBrO) is approximately 2.8 x 10^-9.

The pH of a solution can be used to calculate the concentration of H3O+ ions, which can then be used to determine the concentration of the acid (in this case, HBrO). The formula to calculate pH is pH = -log[H3O+].

Given that the pH of the solution is 4.96, we can calculate the concentration of H3O+ ions using the equation 10^(-pH) = [H3O+]. Substituting the given pH value, we have 10^(-4.96) = [H3O+].

Calculating this, we find that the concentration of H3O+ ions is approximately 1.07 x 10^(-5) M.

Since HBrO is a weak acid, we can assume that the concentration of H3O+ ions is equal to the concentration of HBrO. Therefore, the concentration of HBrO is also approximately 1.07 x 10^(-5) M.

The equilibrium expression for the dissociation of HBrO is: Ka = [H3O+][BrO-]/[HBrO]. We can substitute the calculated concentration values to obtain Ka = (1.07 x 10^(-5))^2 / (1.07 x 10^(-5)) = 1.07 x 10^(-5) M.

Therefore, the Ka value for hypobromous acid is approximately 2.8 x 10^-9.

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Answer:

1) 0.4045nm

2) 0.0027096117g/cm³

Explanation:

1) Using the value of ionic radius of aluminum ion r=0.143 nm, the length of each edge of the unit cell can be calculated as what nm?

In the question above, using a face centered cubic structure, we have:

For a face centered site of the cube,

The diagonal = 4r

Where r =Atomic or ionic radius of Aluminum

Let the edge length of the cube be represented by X

Therefore, we have based on Pythagoras theorem,

X² + X² = (4r)²

2X² = 16r²

Divide both sides by 2

X² = 8r²

Find the square root of both sides

X = √8 × r

Since r = 0.143nm

The length of each edge of the unit cell can be calculated as

X = √8 × 0.143nm

X = 0.4044650788nm

Approximately = 0.4045nm

2) Using atomic weight value of aluminum 27.0, the density of aluminum can be calculated as what g/cm^3

Density of an object = Mass of the Object / Volume of the Object.

The object in this question = Cube

Step 1

Volume of a cube = (Length of the cube)³

In the question above, side length of the cube = 0.4045nm

When would convert 0.4045nm to centimeters

= 1 nm = 1 × 10^-7 cm

0.4045nm =

Cross multiply

= 4.045 × 10^-7 cm

Volume of the Aluminum cube =(4.045 × 10^-7cm)³

= 6.618439112 ×10^-20cm³

Step 2

The atomic weight value of aluminum is given as 27.0 in the question

A face centered cubic structure has 4 atoms per unit cell.

1 Atomic mass or weight value = 1.6605 × 10^-24 grams

Hence, the mass of Aluminum is calculated as:

(4 atoms /1 cell )× 1 unit × (27/ 1 atom of Aluminium) × (1.6605 × 10^-24g/ 1 Atomic mass value)

= 1.79334 ×10^-22g

Density = Mass/Volume

= 1.79334 ×10^ -22g /6.618439112 ×10^-20cm³

= 0.0027096117g/cm³

Answer:

5 on k-12 that's the answer

Explanation:

Explanation:

nah so easy

it's a direction of electron spinning in the shell

+½ means electron spinning in clockwise direction

-½ means electron spinning in anticlockwise direction

\(\boxed{\boxed{\Large\textsf{$\sf mass = 3.4 \times 63.02=214.3$ g (4 s.f)}}}\)

The mass of nitric acid (HNO₃) can be determined by considering the relationship between number of moles, mass, and molar mass:

\(\boxed{\large\textsf{$\sf\displaystyle number\ of\ moles\ (mol)=\frac{mass\ present\ (grams)}{molar\ mass\ (g/mol)}$}}\)

Rearranging this formula to find mass, therefore, mass present = number of moles ÷ molar mass:

\(\boxed{\large\textsf{$\sf\displaystyle mass=moles\times molar\ mass$}}\)

Since we are already given the number of moles of HNO₃ present, we just need the molar mass. The molar mass of elements can be found on any standard periodic table, and the molar mass of a compound is just the sum of all the molar masses of the elements in the compound.

∴ molar mass HNO₃ = H (1.008) + N (14.01) + O₃ (3×16.00) = 63.02 g/mol.

Now plugging in all our values into the formula:

\(\boxed{\boxed{\large\textsf{$\therefore \sf mass = 3.4 \times 63.02=214.3$ g (4 s.f)}}}\)

\(\hrulefill\)

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The sponge is unsaturated when it is taking in more water. It becomes saturated when it stops taking in water. It is supersaturated when water starts oozing out from the sponge.

A saturated solution contains just as much solute as it normally hold at a particular temperature. An unsaturated solution contains less solute than it can normally hold at a particular temperature. A supersaturated solution contains more solute than it can normally hold at a particular temperature.

We can use a sponge to model these three scenario as follows;

Water continues to enter into the sponge when it is unsaturated, this continues until the sponge becomes saturated with water and takes in no more water. When the sponge becomes supersaturated, water begins to ooze out from the sponge because it can no longer hold more water.

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Water is always involved in hydrolysis reactions in the given options.

The term "hydrolysis" refers to the breakage of chemical bonds by the addition of water and represents the reaction of an organic chemical with water to produce two or more new chemicals. Some occurrences of hydrolysis include the formation of hydronium and bisulfate compounds when sulphuric dissolves in water or a salt of a weak acid or base is mixed with water.

Inversion is the mechanism of hydrolyzing sucrose to produce glucose and fructose. Invert sugar is the consequence of the hydrolysis of sucrose, which causes the sign of rotation to alter from dextro (+) to laevo (-).

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Five observable properties for separating mixtures are particle size, colour, texture, shape, magnetic attraction.

Mixtures are compounds that are made up of two or more chemical compounds which are not linked to each other chemically. They can be easily separated.

The mixtures can be separated by properties like particle size, colour, density, shape, magnetic attraction.

Sieving can be used to separate compounds based on particle size. Chromatography can be used to separate compounds based on colour as each colour would have differences in properties. Flotation can be used to separate compounds based on density like oil in water. Centrifugation can be used to separate compounds based on shape. Magnetic separation can be used to separate metals from non-metal compounds in a mixture.

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Answer:

I believe it is D, Heavy ice presses on sediment causing the formation of sedimentary rock

Explanation:

Answer: a. 1

Explanation:

Answer:

Sorry can't help

Explanation:

Cant help!

Answer:

TRUE

Explanation:

Humans and many animals are responsible for air pollution. Even natural processess such as excreting feces results in release of methane, CO2 etc which contribute to air pollution

Humans are not the only animals that pollute the air. This statement is True.

Substance that alters the natural properties of the atmosphere, whether it be chemical, physical, or biological, is considered an air pollutant. Air pollution can occur inside or outdoors. Common causes of air pollution include motor vehicles, industrial operations, household combustion appliances, and forest fires.

Although there are certain natural processes that can produce air pollution, such as sulfur and chlorine gases from volcanic activity, smoke and ash from wildfires, dust storms, and biological degradation, manmade causes account for the majority of pollution in the atmosphere.

Particles that are both solid and liquid, as well as certain gases that are suspended in the air, are what produce air pollution. These gases and particles can be produced by industries, volcanoes, wildfires, dust, pollen, and vehicle and truck emissions.

Thus, Humans are not the only animals that pollute the air. This statement is True.

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Answer:

when we drink the milk the digestive system produce protease enzyme to break down the protein of milk.

Answer:

in meters its 0.01175

Explanation:

Answer:

0.01175 meters

Explanation:

17.99 g of water will formed when nitric acid (63 g) and sodium hydroxide (60 g) are mixed.

When nitric acid and sodium hydroxide are mixed, a neutralisation reaction takes place, with the salt created by the two substances and water serving as the reaction result. The rational response to the statement in this instance is:

Na(OH) + HNO3 ⇒ NaNO3 + H2O

• The formula for HNO3's molar mass is 3xmO + mH + mN, or 3x15.99g + 1g + 14g = 62.97 g/mol.

• The formula for NaOH molar mass is: mO + mH + mNa = 15.99g + 1.00g + 22.99g = 39.98 g / mol.

18g of water and 63g of HNO3

17.99 g of water from 62.97 g of HNO3

62.97 g divided by 18 g and 63 g equals 17.99 g of water.

As a result, 17.99 g of water will form.

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Answer:

205.12 atm

Explanation:

Using the ideal gas law equation:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

R = 0.0821 Latm/perK)

T = temperature (K)

n = number of moles (mol)

According to the information in this question;

P = ?

V = 34.25 mL = 34.25 ÷ 1000 = 0.03425L

n = 0.215 mol

T = 125.0°C = 125 + 273 = 398K

Using PV = nRT

P = nRT ÷ V

P = (0.215 × 0.0821 × 398) ÷ (0.03425)

P = 7.025 ÷ 0.03425

P = 205.12 atm

Answer:

D

Explanation:

Answer:

D

Explanation:

:)

Answer:

3 electrons

Explanation:

Nitrate needs 3 electrons to achieve a stable electron configuration

Three is the answer. it needs three to complete its shell

The two chlorine atoms have a total charge of -2 hence the total charge in the compound is zero. Three oxygen atoms each having a charge of -2 making a total charge of -6 hence the total charge in the compound is zero.

In magnesium chloride, magnesium has a charge of +2. Chlorine has a charge of +1. However, in the compound, there are two chlorine atoms and one magnesium atom. As such, the two chlorine atoms have a total charge of -2 hence the total charge in the compound is zero.

In Aluminium oxide (Al2O3), there are two aluminium atoms having a total charge of +6. There are three oxygen atoms each having a charge of -2 making a total charge of -6 hence the total charge in the compound is zero.

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Chemicals are not supposed to be poured down the drain.

Chemicals should not be poured down the drain. This can cause harm to the plumbing system, sewage treatment plants, and the environment. Dispose of household chemicals properly by taking them to a designated recycling center or household hazardous waste collection event.

Thus the action that have been undertaken by Thomas and Trenton  is quite wrong since the chemicals that they have poured down the drain could lead to an environmental hazard.

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Answer:

Covalent bonds are the strongest bonds in nature and under normal biological conditions have to be broken with the help of enzymes. This is due to the even sharing of electrons between the bonded atoms and as with anything equally shared there is no conflict to weaken the arrangement.

Explanation:

Bonding electrons are described as electrons that participate in chemical bonds. Chemical bond, a strong attraction between atoms, ions, or molecules, might be the subject here. Atoms sharing electron pairs form a covalent or molecular connection. An attraction between the atomic orbitals of atoms in a molecule is called a bonding molecular orbital.

Which bonding type results in stronger bonds? What is your evidence?

A covalent bond is created when the difference between two atoms' electronegativities is too small for an electron transfer to occur and produce ions. Bonding electrons are collectively referred to as the electrons that are present between the two nuclei. The "glue" that binds the atoms into molecular structures is the bound pair.

It is the most powerful link. By sharing an electron, the two atoms in such a bond are joined together.

One Hydrogen atom with one valence electron and one Chlorine atom with seven valence electrons, for instance, make up the HCL molecule. In this instance, hydrogen and chlorine share an electron to create a single bond.

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1. Some reactions will present an actual yield lower than the theoretical yield, and this can occur due to many situations, a couple of the reasons why that we can list is that some reactions don't have the reactants actually reacting to form the products, and another reason why is the loss of reactants in the process for many possible situations.

4. According to the solubility curve, if we have 30 grams of NH4Cl at 50°C, the reaction will be unsaturated

Strong nucleophile, good leaving group, polar aprotic solvent, methyl or primary halide. The correct answer is option: b.

In an SN2 reaction, a nucleophile attacks the carbon atom to which the leaving group is attached, while the leaving group departs from the molecule. The reaction proceeds in a single step, with the nucleophile and leaving group involved in the transition state. A strong nucleophile is required to attack the carbon atom, and a good leaving group is necessary to depart from the molecule. Methyl or primary halides are preferred substrates because they are less hindered, making the attack by the nucleophile easier. Option b is correct.

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Answer: just trust me its c

Explanation: i dont cap

Answer:

there is no picture so we can't tell why the containers are heavy

Answer:

2. Molten rock rises in Earth's mantle caused by (pressure)

Explanation:

i think i just had a similar question

Answer:

d

Explanation:

its not a b c

The qualitative term for a solution containing solute at a relatively low concentration is dilute.A solution is a homogeneous mixture of two or more substances.

It consists of a solute that is dissolved in a solvent. There are different types of solutions based on the amount of solute dissolved in a solvent. These types include a dilute solution, a concentrated solution, and a saturated solution. Let's look at the meaning of the dilute solution.

A solution that contains a low concentration of a solute is called a dilute solution. It has a lesser amount of solute dissolved in a solvent. The quantity of solute in a solution is expressed in terms of its concentration. Dilute solutions are often prepared by adding solvent to a concentrated solution. When a solute is added to a solvent, it dissolves to form a solution. As more and more solute is added, the solution's concentration increases.

Concentration is the measure of the amount of solute present in a solution. It can be expressed in qualitative or quantitative terms. Qualitative terms describe a solution as dilute or concentrated based on the amount of solute present in a solution. On the other hand, quantitative terms specify the exact amount of solute present in a solution. This is expressed in units such as parts per million (ppm), molarity (M), and mole fraction (x).

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Answer:

Atomic Number = 3.

Explanation:

The number of protons determines the atomic number. Basically the number of protons is the exact same as the atomic number.

Protons 3 = Atomic number 3