what would be the concentration of both h2co3 and hco3 - in 1.00 l of buffer solution that has a total concentration of 0.350 m and a ph of 6.50? pka1 of carbonic acid = 6.35

Answer:

En el grupo de los no metales se incluyen los halógenos​ (flúor, cloro, bromo, yodo, astato y téneso), que tienen 7 electrones en su última capa de valencia y los gases nobles (helio, neón, argón, kriptón, xenón, radón), que tienen 8 electrones en su última capa (excepto el helio, que tiene 2).

Explanation:

halógenos

Answer:

1,4

Explanation:

In the context of atomic orbital (AO) wavefunctions, the terms "radial node" and "nodal plane" refer to different aspects of the wavefunction's behavior.

A radial node is a region in the AO wavefunction where the probability of finding an electron is zero along the radial direction. In other words, it represents a spherical shell where the electron is unlikely to be found. The number of radial nodes is determined by the principal quantum number (n) of the orbital. For example, the 2s orbital has one radial node, while the 2p orbital has no radial nodes.

On the other hand, a nodal plane is a flat plane within the AO wavefunction where the probability of finding an electron is zero along a particular direction. It represents a surface that divides the orbital into two regions of opposite phases. The number of nodal planes is determined by the angular quantum numbers (l and m) of the orbital. For example, the 2s orbital has no nodal planes, while the 2p orbital has one nodal plane (the xz or yz plane).

Radial nodes arise from the radial part of the wavefunction because they depend on the distance from the nucleus. The radial part determines the distribution of the electron density as a function of distance, and the nodes correspond to regions where the density drops to zero.

On the other hand, nodal planes arise from the angular part of the wavefunction because they depend on the orientation and shape of the orbital. The angular part describes the angular distribution of the electron density around the nucleus, and the nodal planes correspond to regions where the phase of the wavefunction changes sign.

In summary, radial nodes are related to the distance from the nucleus and arise from the radial part of the wavefunction, while nodal planes are related to the orientation and shape of the orbital and arise from the angular part of the wavefunction. The 2s orbital has one radial node and no nodal planes, while the 2p orbital has no radial nodes and one nodal plane.

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Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question we have

\(density = \frac{15}{14} \\ =1.0714285 ...\)

We have the final answer as

Hope this helps you

Smooth endoplasmic reticulum are the structure responsible for the synthesis of fatty acids and steroids, detoxification and inactivation of drugs and potentially harmful substances.

Vertebrate liver cells include smooth endoplasmic reticulum, which aids in the detoxification of medicines and toxins. It has enzymes that can convert medications and metabolic waste products from lipid-soluble to water-soluble forms, allowing for simple removal from the body.

Due to the presence of an organelle known as SER, liver cells in the human body detoxify medications and other toxins. Steroid production also involves SER.

Important tasks carried out by peroxisomes include lipid metabolism and toxic detoxification. Additionally, they participate in oxidation processes that degrade fatty acids and amino acids.

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Answer:

velocity

Explanation:

Acceleration is the rate of change of velocity with time.

Acceleration= velocity/time

Answer:

A) 10.13 is the answer

Explanation:

Since HCl is a strong acid, its pH can be found by simply plugging it into the equation:

pH = -log[H+]

*H+ is just the concentration you were given*

Now that you have the pH, you just subtract it from 14 to find the pOH

I have attatched my work below. Hope this helps! :^)

To find the pOH of a solution, you can use the formula: pOH = -log10[OH-]

pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. It is the negative logarithm (base 10) of the hydroxide ion concentration.

In this case, since we have hydrochloric acid (HCl), we need to consider the concentration of hydroxide ions (OH-) produced when HCl dissociates in water.

HCl is a strong acid and completely dissociates, meaning it produces an equal concentration of hydrogen ions (H+) and chloride ions (Cl-) in water. Since there are no hydroxide ions produced, the concentration of hydroxide ions is 0.

Therefore, the pOH of a hydrochloric acid solution is 0, and none of the options provided (A, B, C, D) is the correct answer.

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The sparrow population should decrease.

Explanation:

There will be less sparrows if their are more hawks because the hawks eat the sparrows.

The increase in the hawk population means they will be eating more and so there will be fewer sparrows.

The amount of calcium ingested by drinking eight 8-oz glasses of local water is 0.0041655 mol. By drinking 1.0L of local water, approximately 166.85 mg of calcium is ingested, which is 14.5% of the daily requirement of calcium.

1. To calculate the amount of calcium ingested by drinking eight 8-oz glasses of local water, we need to know the volume of water and the concentration of calcium ions present in it.1 oz = 29.57mL

So, eight 8-oz glasses of water = 8 x 8 oz = 64 oz= 64 x 29.57 mL = 1892.48 mL1 L = 1000 mL

Therefore, the volume of water in liters = 1892.48/1000 = 1.8925 L

Concentration of Ca ions in water = 0.0022 mol/L

So, the amount of calcium ingested = concentration of calcium x volume of water= 0.0022 mol/L x 1.8925 L= 0.0041655 mol of calcium

2. To calculate the percentage of the daily requirement of calcium met by drinking 1.0L of local water, we need to convert the amount of calcium in moles to milligrams (mg). The molar mass of calcium is 40.08 g/mol.0.0041655 mol of calcium weighs = 0.0041655 mol x 40.08 g/mol = 0.16685464 g or 166.85 mg

The percentage of the daily requirement of calcium met by drinking 1.0L of local water is given by the formula:

Percentage of daily requirement met = (amount of calcium in water/daily requirement of calcium) x 100%Daily requirement of calcium = 1150 mg

Percentage of daily requirement met = (166.85 mg/1150 mg) x 100%≈ 14.5 %

Therefore, by drinking 1.0L of local water, approximately 166.85 mg of calcium is ingested, which is 14.5% of the daily requirement of calcium.

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To save an unhealthy lawn, undertake a scientific project involving soil analysis, adjusting soil conditions, implementing proper watering practices, addressing pest and weed control, ensuring proper mowing techniques, monitoring and maintaining the lawn, and seeking professional advice if needed.

Identify the problem: Determine the specific issues affecting the lawn, such as discoloration, patchy areas, or pests. Observe the lawn closely to identify any underlying causes for its unhealthy condition.

Conduct soil analysis: Collect soil samples from different areas of the lawn and perform a soil analysis. This analysis will provide information about the soil's pH level, nutrient composition, organic matter content, and any imbalances that may be contributing to the lawn's poor health.

Adjust soil conditions: Based on the soil analysis results, take necessary steps to correct any imbalances or deficiencies. This may involve adding fertilizers to provide essential nutrients, adjusting the pH level with soil amendments, or enhancing soil structure by adding organic matter.

Implement proper watering practices: Evaluate the lawn's watering regimen. Ensure the lawn receives adequate water but avoid overwatering, as it can lead to fungal growth and shallow root development. Use a targeted watering approach, focusing on the lawn's needs and avoiding water wastage.

Address pest and weed control: Identify any pests or weeds affecting the lawn's health. Implement appropriate pest management strategies, such as using organic or chemical-based pest control methods. Remove weeds manually or apply herbicides selectively to prevent competition with the grass.

Ensure proper mowing techniques: Evaluate the lawn's mowing practices. Adjust the mowing height to the appropriate level for the grass species and avoid cutting too short, as it can stress the grass and make it more susceptible to disease and pests.

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Answer:

Yes, it is possible. Let us consider an example of two solutions, that is, solution A having 20 percent mass RbCl (rubidium chloride) and solution B is having 15 percent by mass NaCl or sodium chloride.  

It is found that solution A is having more concentration in comparison to solution B in terms of mass percent. The formula for mass percent is,  

% by mass = mass of solute/mass of solution * 100

Now the formula for molality is,  

Molality = weight of solute/molecular weight of solute * 1000/ weight of solvent in grams

Now molality of solution A is,  

m = 20/121 * 1000/80 (molecular weight of RbCl is 121 grams per mole)

m = 2.07

Now the molality of solution B is,  

m = 15/58.5 * 1000/85

m = 3.02

Therefore, in terms of molality, the solution B is having greater concentration (3.02) in comparison to solution A (2.07).

In the solid state, water molecules are bound together in an orderly, structured lattice.

Gaseous state is a physical state in which matter exists as a gas. In this state, particles are very far apart and have no definite shape or volume. Examples of gaseous states include steam, oxygen, and nitrogen. Gases are typically very compressible and can occupy a wide range of volumes and pressures.

When heated, the molecules break the intermolecular bonds and move randomly, becoming a liquid. As the water is heated further, the molecules move faster and faster and eventually break apart into individual atoms. This process is called evaporation, and it occurs when the molecules have enough energy to break away from the liquid surface and move into the atmosphere. In the gaseous state, the water molecules are no longer bound together and are free to move independently

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Given chemical reaction,

Glucose + Oxygen → carbon dioxide + water

Reactants : Glucose and oxygen.

Products : carbon dioxide and water.

Each chemical reaction is made up of three main components: the reactants (located on the left side of the reaction equation), the products (located on the right side of the reaction equation), and the particular reaction conditions, which are listed above or below the arrows in the middle of the reaction equation.

Combustion is one of the five fundamental types of chemical reactions, along with combination, decomposition, single-replacement, and double-replacement. You can classify a reaction into one of these groups by looking at the reactants and products of the reaction in question. It is possible for some reactions to fall into more than one category.

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Answer: it is a good conductor of electriciy tht is what wires are made of and it is a good conductor of heat so it will be able to handle the heat from the electricity

Explanation:

Answer:

Iron is a shiny, bright white metal that is soft, malleable, ductile and strong. Its surface is usually discolored by corrosion, since it combines readily with the oxygen of the air in the presence of moisture. In absolutely dry air, it does not rust

Explanation:

I hope it helps

Answer:

It is true.

Explanation:

Its a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero

According to the given picture:

A represents the atomic number.

B represents the chemical symbol.

C represents the atomic mass.

D represents the name of the element.

Answer:

Yes it does change

Explanation:

Giant molecules are also referred to as macromolecules and polymers when numerous molecules are combined. These atoms are arranged in a three-dimensional structure and are joined by covalent bonds.

A giant molecule, also known as a macromolecule, is a usually large molecule crucial to biophysical processes, such as a protein or nucleic acid. It is made up of many atoms that are covalently bound. Large non-polymeric molecules including lipids and macrocycles, as well as biopolymers, are the most prevalent macromolecules in biochemistry. In addition to synthetic fibers, giant molecules can also be found in research materials like carbon nanotubes.

Different experts use different terminology for giant molecules. For instance, in biology, giant molecules refer to the four immense molecules that make up living things, while in chemistry, it refers to aggregates of two or more molecules that are held together by intermolecular forces rather than covalent bonds yet that is difficult to dissolve apart. The term giant molecule is frequently referred to as high polymer in British English.

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Gas is a type of matter that has no defined shape or volume. Gases can be made up of a single element, such as hydrogen gas (H2), a compound, such as carbon dioxide (CO2), or a mixture of several gases, such as air.

A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container, even in the presence of gravity and regardless of the amount of substance in the container.

By evaluating the four major gases you're searching for—oxygen (O2), carbon monoxide (CO), hydrogen sulphide (H2S), and methane (CH4)—a 4 gas monitor can help you protect your employees in any setting.

Natural gas is an odorless, gaseous mixture of hydrocarbons—predominantly made up of methane (CH4).

In a gas when Volume increase Temperature decreases.

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Answer:

closely related

Explanation:

1) Write the formula

2) The subscripts show us the number of each atom in the formula. In this case, we also have to make sure to count the parenthesis subscript.

There are

3 Cu

2 P

8 O

Answer

Provide the body with the calories, or energy, to grow as well.

1. When a compound is purified through recrystallization, the melting point range of the compound increases. It is one of the most common techniques used for the purification of solids. It involves dissolving the compound in a minimum amount of hot solvent and then slowly cooling the solution. This process results in the formation of purified crystals of the compound.

The melting point of a solid compound is the temperature range at which it melts and changes from a solid to a liquid state. The melting point of a pure compound is always higher and has a narrower range than the melting point of an impure compound. Therefore, recrystallization can be used to increase the melting point range of the compound, making it more pure.

2. Impurities in the mixture can be removed through the process of recrystallization. Insoluble impurities are removed through the filtration process. Salicylic acid is a slightly soluble in cold water, and highly soluble in hot water. Sand, on the other hand, is insoluble in water. The mixture is dissolved in hot water, which dissolves the salicylic acid. After filtration, the sand remains on the filter paper while the salicylic acid solution passes through the filter paper.

The solution is then cooled, causing the salicylic acid to recrystallize, resulting in the separation of pure crystals of salicylic acid. The impurities, such as sand, are left behind in the filtrate, while the purified compound is collected through recrystallization.

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The chemist has 642.4 millimoles of barium acetate in the solution.

To calculate the millimoles of barium acetate (Ba(C₂H₃O₂)₂) in the solution, we can use the formula:

moles = molarity × volume (in liters)

First, let's convert the volume from milliliters (mL) to liters (L):

440.0 mL ÷ 1000 = 0.440 L

Now we can substitute the given values into the formula:

moles = 1.46 M × 0.440 L

moles = 0.6424 mol (rounded to 4 decimal places)

To convert the moles to millimoles, we multiply by 1000:

millimoles = 0.6424 mol × 1000

millimoles = 642.4 mmol (rounded to 3 significant digits)

Therefore, the chemist has 642.4 millimoles of barium acetate in the solution.

It's important to note that the molarity (M) represents the number of moles of solute per liter of solution. By multiplying the molarity by the volume in liters, we can find the number of moles of solute. To convert moles to millimoles, we multiply by 1000. The result represents the millimoles of barium acetate present in the given volume of solution.

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225.0 g of water releases -33,646.125 J of heat energy when it cools from 85.5°C to 50.0°C.

To calculate the amount of heat released when water cools, we can use the formula:

Q = m * c * ΔT

Where:

Q is the heat energy in joules,

m is the mass of the water in grams,

c is the specific heat of water in J/g•°C,

ΔT is the change in temperature in °C.

Given:

m = 225.0 g

c = 4.18 J/g•°C

ΔT = (50.0°C - 85.5°C) = -35.5°C (negative because the water is cooling)

Substituting these values into the formula, we have:

Q = 225.0 g * 4.18 J/g•°C * (-35.5°C)Q = -33,646.125 J

The negative sign indicates that heat is being released by the water as it cools. Therefore, 225.0 g of water releases -33,646.125 J of heat energy when it cools from 85.5°C to 50.0°C.

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In order to prepare 100.0 mL of hypochlorous acid buffer solution with a pH of 7.80, we would dissolve 0.050 mol HCLO in 100.0 mL of water, then add 8.34 g of solid NaClO and mix until fully dissolved

To prepare a hypochlorous acid buffer solution with a pH of 7.80, we need to calculate the appropriate concentrations of HCLO and NaClO.

First, we need to determine the pKa of HCLO, which is 7.54.

Next, we use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

We want a pH of 7.80, so:

7.80 = 7.54 + log([A-]/[HA])

Solving for the ratio of [A-]/[HA], we get:

[A-]/[HA] = 10^(7.80 - 7.54) = 2.24

Now we can use the known concentration of HCLO and the desired volume of the buffer solution to calculate the amount of HCLO needed:

0.500M = moles/L

moles = 0.500M x 0.100L = 0.050 mol HCLO

To calculate the amount of NaClO needed, we can use the ratio of [A-]/[HA]:

[A-]/[HA] = [NaClO]/[HCLO]

2.24 = [NaClO]/0.050 mol

[NaClO] = 0.112 mol

Now we can use the molar mass of NaClO to calculate the mass needed:

0.112 mol x 74.44 g/mol = 8.34 g NaClO

So, to prepare 100.0 mL of hypochlorous acid buffer solution with a pH of 7.80, we would dissolve 0.050 mol HCLO in 100.0 mL of water, then add 8.34 g of solid NaClO and mix until fully dissolved.

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Answer:

This is a fusion process.

This is a fission process.

Explanation:

Select the statements that are correct regarding this reaction.

This is a fusion process.

This is a fission process.

The mass of the products is exactly equal to the reactants.

Only the number of particles of product equals the number of particles of reactants.

Could be more than one answer

Hydrogen 1 + Lithium 7 yields 2 Helium 4 plus energy

you have merged hydrogen 1  with Lithium 7 to produce a temporary berylium8, so it is fusion, because you are fusing the particles together.

the energy of the impact of the hydrogen on the lithium

causes the temporary berylium 8 to split into 2 helium atoms, so it is then fission, because you are splitting an atom of berylium8.

the mass of the reactants and products are not equal, because some of the energy comes from conversion of the reactant mass to energy by E=mcc

The number of reactant particles does equal the number of product particles, bute answer says ONLY which is not correct

In the given reaction, The mass of the products is exactly equal to the reactants. However this a radioactive  process where, lithium and hydrogen react together forming two helium nuclei.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the total mass of a system is conserved. In a closed system the mass cannot be lost.

For a chemical reaction, new products are formed by regrouping of atoms from the reactants where no new atom is produced not any lost. Hence, the total mass in the reactant side will be equal to the total mass in the product side.

In the given reaction the number of particles are equal in both side as well mass too equal in both side. The total mass in reactant side and product side is 8.

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Answer:

6.408924056 miles/hour.

Explanation:

First we have to convert 247.54 km to miles. The conversion factor will be 1 km = 0.621371 miles. To do this I set up my stoichiometry.

247.54km | 0.621371miles = 153.8141773 miles

                 |  1 km

Now we have 153.8141773 miles per 1 day. The conversion factor will be 1 day = 24 hours.

153.8141773 miles | 1 day       6.408924056 miles/hour.

1 day                      | 24 hours

(if you need to know what I did with the stoichiometry just ask! I'll be happy to help!)

Total eclipse refers to the configuration where the two largest groups lie directly behind one another. The most energy is found in this configuration. Using a line to represent the front atom and a circle to represent the back carbon

The Newman projection, which is useful in alkane stereochemistry, shows how a chemical bond is arranged from front to back. Distal refers to the carbon atom towards the back, whereas proximal refers to the carbon atom in the front. The reason why the anti-staggered conformation is more stable than the gauche and eclipsed conformations is that the bulky groups are arranged opposite to one another, which reduces the steric hindrance between the groups and increases the stability of the molecule.

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