the molar solubility of pbi 2 is 1.5 × 10 −3 m. calculate the value of ksp for pbi 2 .4.5 x 10 -6

Answer:

We heart you don't have all the information you just got some common substances and their chemical formulas are listed in the chart? That we don't have the chart to see which of the substances are elements

Explanation:

sorry about that if you can take a picture of it and repost it I am sure I could answer it for you

Nitrous acid has the chemical formula HNO2. To determine the number of oxygen atoms in 15 mg of nitrous acid, we need to first calculate the number of moles of nitrous acid in 15 mg. The molar mass of nitrous acid is 47.013 g/mol.

Therefore, 15 mg of nitrous acid is equivalent to 0.000319 moles. In one molecule of nitrous acid, there are two oxygen atoms. Thus, the number of oxygen atoms in 15 mg of nitrous acid would be 0.000319 moles multiplied by 2 oxygen atoms, which is equal to 0.000638 oxygen atoms. Therefore, there are approximately 0.000638 oxygen atoms in 15 mg of nitrous acid.
To find the number of oxygen atoms in 15 mg of nitrous acid (HNO2), first determine the number of moles of nitrous acid. Nitrous acid has a molar mass of 1(H) + 14(N) + 16(O) * 2 = 47 g/mol. Divide the mass by the molar mass: 15 mg / 47 g/mol = 0.00032 mol (convert mg to g).

Now, find the moles of oxygen atoms in nitrous acid. Each molecule of HNO2 has 2 oxygen atoms. So, 0.00032 mol HNO2 * 2 = 0.00064 mol of oxygen atoms.

Finally, calculate the number of oxygen atoms using Avogadro's number (6.022 x 10^23 atoms/mol): 0.00064 mol * 6.022 x 10^23 atoms/mol = 3.85 x 10^20 oxygen atoms in 15 mg of nitrous acid.

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Answer:

B. 96.12 g

Explanation:

To solve this question we must convert each reactant to moles. Using the balanced equation we can find limiting reactant. With moles of limiting reactant we can find the moles of methanol and its mass:

Moles CO -Molar mass: 28.01g/mol-

140.1g CO * (1mol / 28.01g) = 5.0 moles CO

Moles H2 -Molar mass: 2.01g/mol-

12.12g * (1mol / 2.01g) = 6.03 moles H2

For a complete reaction of 5.0 moles of CO are required:

5.0moles CO * (2mol H2 / 1mol CO) = 10.0 moles of H2 are required

As there are just 6.03 moles, H2 is limiting reactant.

The moles of methanol produced are:

6.03 moles H2 * (1mol CH3OH / 2mol H2) = 3.015 moles CH2OH

Mass CH3OH -Molar mass32.04g/mol-:

3.015 moles CH2OH * (32.04g/mol) =

96.6g CH3OH ≈ B. 96.12 g

The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2

Bond order = (8 - 5) / 2

Bond order = 1.5.

This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

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Answer:

One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant.

Explanation:

hope this helped!

The student's assertion that was backed up should consist of a physical object, a positive charged particle, and a movement in the direction of the negative plate.

According to physics, a charged particle is a particle that also has an electric charge. It should be an atom, molecule, or ion having an excess or shortage of electrons in relation to the b. Whenever an object should be regarded as a positive charge.

A repelling force is produced when two negatively charged particles come into contact. A straight line and their centres are affected by the repelling force. A coulomb interaction or electrostatic repulsion is what is happening here.

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Question:-

A student makes the claim that the space around a charged particle will exert a force on any other charged particle that is placed within this space If an object is placed between two charged metal plates, one

plate that is positively charged and one plate that is negatively charged, which argumentBEST supports the student's claim?

A

An object with a positive charge will move toward the negative plate

B

An object with a negative charge will remain stationary between the plates

A neutrally-charged object will move toward the positive plate

A neutrally-charged object will move toward the negative plate

Answer:

Se administran 2500 gramos de solución por día.

Explanation:

Dado

Volumen de la solución = 2,5 litros

Como sabemos 1 litro = 1000 gramos

Por lo tanto, 2.5 litros = 2500 gramos

Se administran 2,5 litros en un intervalo de 24 horas o 1 día.

De ahí que se pueda decir que se administran 2500 gramos de solución al día.

Answer:

lol

Explanation:

Answer:

felt that.__________

To prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.The ratio of benzoic acid to sodium benzoate in the buffer solution using the Henderson-Hasselbalch equation.

To prepare a pH 4.00 buffer solution using benzoic acid and sodium benzoate, we need to calculate the appropriate volumes of the 0.100 M benzoic acid and 0.240 M sodium benzoate solutions.

First, we need to determine the ratio of benzoic acid to sodium benzoate in the buffer solution. The Henderson-Hasselbalch equation can help us with this calculation:

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

Given that the pH is 4.00 and pKa is 4.20, we can rearrange the equation:

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

log([A-]/[HA]) = 4.00 - 4.20

log([A-]/[HA]) = -0.20

Next, we take the antilog of -0.20 to find the ratio of [A-] to [HA]:

[A-]/[HA] = antilog(-0.20)

[A-]/[HA] = 0.63

The ratio of [A-] to [HA] is 0.63.

Now, let's calculate the volumes of each solution needed. Let's assume x represents the volume (in mL) of the 0.100 M benzoic acid solution and y represents the volume (in mL) of the 0.240 M sodium benzoate solution.

Since the total volume is 100.0 mL, we have the equation: x + y = 100

Considering the ratio of [A-] to [HA] as 0.63, we can write the equation: y/x = 0.63

Solving these two equations simultaneously will give us the volumes of each solution:

x + y = 100

y/x = 0.63

By substituting y = 0.63x from the second equation into the first equation, we get:

x + 0.63x = 100

1.63x = 100

x = 61.35 mL (rounded to two decimal places)

Substituting this value back into the equation x + y = 100, we find:

61.35 + y = 100

y = 38.65 mL (rounded to two decimal places)

Therefore, to prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.

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Answer:

The value of the Golden Igloo is $227.4 million.

Explanation:

First, we need to find the inner and the outer volume of the half-spherical shell:

\( V_{i} = \frac{1}{2}*\frac{4}{3}\pi r_{i}^{3} \)

\( V_{o} = \frac{1}{2}*\frac{4}{3}\pi r_{o}^{3} \)

The total volume is given by:

\( V_{T} = V_{o} - V_{i} \)

Where:

\( V_{i} \): is the inner volume

\(r_{i}\): is the inner radius = 1.25/2 = 0.625 m

\( V_{o} \): is the outer volume

\(r_{o}\): is the outer radius = 1.45/2 = 0.725 m

Then, the total volume of the Igloo is:

\( V_{T} = \frac{2}{3}\pi r_{o}^{3} - \frac{2}{3}\pi r_{i}^{3} = \frac{2}{3}\pi [(0.725 m)^{3} - (0.625 m)^{3}] = 0.29 m^{3} \)

Now, by using the density we can find the mass of the Igloo:

\( m = 19.3 \frac{g}{cm^{3}}*0.29 m^{3}*\frac{(100 cm)^{3}}{1 m^{3}} = 5.60 \cdot 10^{6} g \)

Finally, the value (V) of the antiquity is:

\( V = \frac{\$ 1263}{oz}*5.60 \cdot 10^{6} g*\frac{1 oz}{31.1034768 g} = \$ 227.4 \cdot 10^{6} \)  

Therefore, the value of the Golden Igloo is $227.4 million.

I hope it helps you!  

Answer:

Chemical changes release a form of energy called electromagnetic energy, which travels through space as waves.

Answer: Its true, mental ions and hydrogen ion both have the same type of charge.

Answer:

TRUE, Metal ions, and hydrogen ions both have the same type of charge. Explanation: Metal atoms lose one or more electrons at their maximum energy level and improve positively charged ions. A hydrogen ion is created when a hydrogen atom loses electrons and then becomes positively charged (charge +1).

Answer:

The energy output objects that work with solar panels include solar inverters, charge controllers, batteries, and electric grid systems.

Explanation:

Answer:

bronze - solid

pure water - liquid

tap water - liquid

trail mix - solid

Explanation:

There are 4 classes of matter based on the characteristics of their molecules:

The molecules in solids are tightly packed together and are more or less fixed about a point with very little of no movement. The molecules in liquids are less tightly packed and are able to take the shape of their containers. The molecules in gases are loosely packed and compressible. They can take the shape of containers as well as expand to a container due to their loosely packed molecules.

Plasma molecules neither have shape nor volume but are able to produce both magnetic and electric currents as well as respond to electromagnetic fields.

Hence bronze has all the characteristics of a solid, pure and tap water both have the characteristics of a liquid, while trail mix can be considered a solid.

"Lysine and arginine are acidic amino acids" is the right answer.

The building blocks of proteins, known as amino acids, are carbon, hydrogen, oxygen, nitrogen, and, occasionally, sulphur.

A carboxyl group and one amine group are both present in the amino acids. They are a zwitterion and are amphoteric.

based on the family of amino acids, which can be further classified into a number of different categories, such as simple amino acids and amino acids containing sulphur.

The amino acids that have sulphur atoms and side-by-side chains are those that contain sulphur. Basic amino acids like arginine and lysine have a side chain that is an NH2 basic group.

Therefore, the correct answer is option D) Lysine and arginine are acidic amino acids.

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Answer:

a: milliliters and grams | b: heat | c: force | d: solid | e: attraction

Explanation:

A: milliliters are cubic and grams are weight.

b: heat make particles go faster

c: thus more collisions and temperature and force

d: solid, they can't move, just vibrate

e: attraction

Answer:

i have no clue

Explanation:

1. The number of mole in 0.293 Kg of Pb is 1.42 mole

2. The number of atom in 0.293 Kg of Pb is 8.55×10²³ atoms

1. How to determine the number of mole

The numbe of mole in the 0.293 Kg of Pb can be obtained as follow:

Mole = mass / molar mass

Number of mole of = 293 / 207

Number of mole = 1.42 mole

Thus, the number of mole is 1.42 mole

2. How to determine the number of atoms

The number of atoms can be obtained as follow:

From Avogadro's hypothesis,

1 mole of Pb = 6.02×10²³ atoms

Therefore,

1.42 mole of Pb = (1.42 mole × 6.02×10²³ atoms) / 1 mole

1.42 mole of Pb = 8.55×10²³ atoms

Thus, the number of atoms is 8.55×10²³ atoms

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Two advantages of buying concentrated products rather than dilute products are that they are generally more cost-effective than dilute products because they require less packaging, transportation, and storage space. And the second advantage is that concentrated products offer greater flexibility and customizability compared to dilute products.

The level of harm a chemical poses depends on various factors, including the specific chemical involved, its concentration, and the mode of exposure. In general, concentrated and dilute chemicals can be harmful if used or mishandled.

Concentrated chemicals can be particularly hazardous because they contain a higher concentration of the active ingredient, which means that a smaller amount of the chemical can have a more potent effect. This can increase the risk of accidental exposure, which can be dangerous or even fatal.

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Answer:

The answer is that compounds are formed when elements are joined and held together by strong forces called chemical bonds. Covalent bonds share electrons between atoms in order to fill their electron shells. In the compound, molecules are held together by the attraction between the nucleus and the shared electrons.

Explanation:

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A large area of the Earth that has a similar climate is not considered a biome.

Hence, option D is correct.

Scientists disagree on the exact number of biomes that exist on earth, therefore we will focus on the six most significant ones: freshwater, marine, desert, forest, grassland, and tundra.

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Answer:

I want to say its Lonic Bonding.

Explanation:

Ionic bonding is the complete transfer of valence electron(s) between atoms.

1.75 x 10²³ atoms of Pb is equivalent to 60.13 grams of Pb.

A measurement of the amount of matter in an item, mass is a fundamental physical attribute of matter. It is a scalar quantity, usually expressed in grams (g) or kilograms (kg) (kg).

Using Avogadro's number and the Pb (lead) atomic mass, we can convert the number of atoms to mass in grams.

Pb has an atomic mass of around 207.2 g/mol.

The number of atoms per mole is 6.022 x 10²³.

We can apply the subsequent steps to translate 1.75 x 10²³ Pb atoms to grams:

Determine the amount of Pb in moles:

0.2902 mol Pb = 1.75 x 1023 atoms Pb / 6.022 x 1023 atoms/mol

Use the atomic mass to convert from moles to grams:

207.2 g/mol x 0.2902 mol Pb = 60.13 g of Pb.

Hence, 1.75 x 10²³ Pb atoms of Pb = 60.13 grams of Pb.

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It is clear that as temperature rises, the kinetic energy of the particles in a perfect atomic gas also rises. This also holds true for actual gases and other ideal gases with more intricate molecular structures.

Heat energy is arbitrarily measured as "temperature" (enthalpy). When a system encounters a higher energy source, the temperature of that system rises as a result.

The result is the transmission of energy as heat, regardless of the source. Heat causes molecules to move more quickly (absorb energy), and some or all of the heat energy is transformed into kinetic energy.

Therefore, the result of heating a gas is a quicker rate of molecular motion. Because of the molecules' more frantic, frenetic mobility and subsequent collisions with the container walls, there is a rise in pressure inside the container.

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Answer:

New elements can be named after a mythological concept, a mineral, a place or country, a property or a scientist. ... "The most recent tradition has been to name them after places or after people." The places chosen tend to be where the element was discovered or first manufactured

Answer:

The founder of the element chooses what the name is.

Explanation:

Answer:

4 atoms of Hydrogen

1 atom of Sulphur

4 atoms of Oxygen

hope it helps you

make me brainliest plz

Energy is released when a nucleus is formed from nucleons.

What is nucleus ?

In chemistry, a nucleus is the positively charged center of the atom consisting of protons and neutrons. It’s also known as the “atomic nucleus”. The word “nucleus” comes from the Latin word nucleus, which is a form of the word nux, which means nut or kernel. The term was coined in 1844 by Michael Faraday to describe the center of an atom. The sciences involved in the study of the nucleus, its composition, and characteristics are called nuclear physics and nuclear chemistry.

How nucleus is formed from nucleons?

To make a nucleus, multiple protons and neutrons have to be brought together. It is reasonable to assume that the nucleons are at least several diameters of protons apart before any nucleus is formed. Since the nuclear forces fall off much faster than the electrical forces over distances, there will always be electrical repulsion preventing the component protons from coming together (unless they are already really close which is unlikely).

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Answer:

A

Explanation:

Answer:

A! have a wonderful day!

Explanation: