what is the solubility (in moles/liter) of pbcl2 in a solution that is 0.15 m solution in hcl? (ksp pbcl2

The oxidation number of the sulfur atom in Li₂SO₄ is +6.

In order to determine the oxidation number of the sulfur atom in Li₂SO₄, we need to look at the oxidation numbers of the other atoms in the compound. The oxidation number of lithium (Li) is +1, and the oxidation number of oxygen (O) is -2. Since there are four oxygen atoms in the compound, the total oxidation number for oxygen is -8.

The sum of the oxidation numbers in a neutral compound is always zero. Therefore, we can use the following equation to determine the oxidation number of the sulfur atom:

Li + S + 4O = 0

2(+1) + S + (-8) = 0

S = +6

Therefore, the oxidation number of S is +6. The compound LiSO₄ doesn't exist, the correct formula is Li₂SO₄.

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Based on the given data, my hypothesis was that the gummy bear would absorb water and expand in size. This hypothesis was correct as there was a significant increase in the volume and mass of the gummy bear from Day 1 to Day 2.

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Compound A is likely an organic halide, Compound B is a derivative of benzene, Compound C is benzene itself, and Compound C can be converted into toluene through a Friedel-Crafts alkylation reaction.

i) Compound A is an alkene.

When heated with silver powder, it undergoes oxidative cleavage to produce Compound B which is an aldehyde.

So the IUPAC names of Compound A and Compound B are ethene and ethanal, respectively.

ii) The acidic nature of Compound B can be proved by treating it with sodium hydrogen carbonate. If effervescence occurs, it is due to the evolution of carbon dioxide gas.

This indicates that Compound B is acidic in nature and reacts with a base to form salt and water.

iii) When Compound C (Benzene) reacts with bromine in the presence of catalyst FeCl3, Bromine water is decolorized to form a colorless solution.

This is an addition reaction that occurs due to the presence of an electron-rich benzene ring.

iv) Compound C (Benzene) can be converted into Toluene (Methylbenzene) through a process known as Friedel-Crafts Alkylation, where Benzene is allowed to react with Chloromethane (Methyl chloride) in the presence of Lewis acid catalyst, Aluminum chloride (AlCl3).

The resulting product is then heated to obtain Toluene (Methylbenzene).

The chemical reaction for the conversion of Benzene to Toluene is given below:C6H6 + CH3Cl → C6H5CH3 + HCl

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Explanation:

The nitrate anion is a univalent (-1 charge) polyatomic ion composed of a single nitrogen atom ionically bound to three oxygen atoms (Symbol: NO3) for a total formula weight of 62.05. Lead Nitrate is generally immediately available in most volumes.

Answer:

compound(C) mixture(M)

Explanation:

COMPOUNDS MIXTURES

(C)In nature they are homogeneous. (M)They can be homogeneous as well as heterogeneous in nature.

(C)They have a definite melting and boiling point. (M)They do not have any definite melting or boiling point.

(C)Example: Baking soda, salt, etc.(M) Example: Salt and sand, sugar and water.

The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.

The electrochemical cell is the cell that is capable of generating the electrical energy from the chemical reactions or by the use of the electrical energy to cause the chemical reaction. The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.  

There are the two types of the electrochemical cells is as follows : the galvanic called the electrolytic cells. the galvanic cell is also called as the voltaic cell.

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Answer:

HeyA ❤

Let us consider the mass of oxygen as 1 g.

Mass of lead obtained from yellow oxide = 3.45 g – 0.24 g = 3.21 g

Mass of oxygen = 0.24 g

The mass of lead that combines with 0.24 g of oxygen = 3.21 g

Therefore, mass of lead that combines with 1 g of oxygen = 3.21/ 0.24 = 13.4 g

Mass of lead obtained from brown oxide = 1.227 g – 0.16 g = 1.067

Mass of oxygen = 0.16g

The mass of lead that combines with 0.16 g of oxygen = 1.067 g

Therefore, mass of lead that combines with 1 g of oxygen = 1.067/ 0.16 = 6.66 g

Now, ratio of masses of lead which combines with a fixed mass of oxygen = 13.4 : 6.66

= 2 :1

Thus, masses of lead which combine with the fixed mass of oxygen are in the ratio of (2:1) i.e. small whole numbers.

Hence, the law of multiple proportions is illustrated.

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The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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9.answer is 0¯²

10.answer is I¯

11. answer is AI+³

12.answer is Cs+

13.answer is Fe+²

14.answer isCI¯

The smallest and least massive atomic particle is the electron, which is negatively charged.Due to the electron's extremely small mass, it is not counted inside the element's atomic number.

Although they are very small and possess a mass of 1/1850 of that of a protons or neutron, electrons carry a negative charge.Since they are so tiny, they do not, in reality, add to the weight of the atom.

These particles are frequently referred to it as subatomic particles since they are the building blocks of atoms.There are protons, neutrons, and electrons, three types of subatomic particles.Protons and electrons, two of a subatomic particles, each have an electrical charge of one or the other.

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To handle coin top containers  place hand over label, place stopper on workbench to avoid dropping it, pour using a stirring rod and wipe off any drops.

Handling coin top containers requires care to prevent spills and ensure safe handling. Here are the steps to handle coin top containers properly:

1. Place hand over the label: Before handling the coin top container, ensure that your hand is securely placed over the label or lid. This will help prevent accidental opening or spillage of the container's contents.

2. Place stopper on workbench: If the coin top container has a removable stopper, place it on a stable workbench or surface. By doing so, you can keep the stopper readily accessible and avoid the risk of dropping it or misplacing it.

3. Pour using a stirring rod: If you need to transfer the contents of the coin top container, use a clean stirring rod or suitable utensil for pouring. Slowly and carefully pour the desired amount of liquid from the container, taking care to control the flow and minimize the chances of spills or splashes.

4. Wipe off any drops: After pouring, inspect the outside of the container and the surrounding area for any spills or drops. If you notice any liquid on the container or workbench, use a clean cloth or paper towel to wipe off the drops promptly. This helps maintain cleanliness and prevent accidental contact with the spilled substance.

Remember to follow any specific handling instructions provided by the manufacturer or any safety guidelines relevant to the contents of the coin top container.

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Combustion reaction is a common reaction used to produce energy. The reaction that describes the combustion of ethanol, C₂H5OH is as follows:

C₂H5OH + 3O₂ → 2CO₂ + 3H₂O
The energy released by the combustion reaction is used to generate electricity or to power machines and vehicles.

This reaction is a chemical process in which a fuel reacts with oxygen to produce heat and light energy. Ethanol is a colorless liquid with a formula of C₂H₅OH. It is an important biofuel and is commonly used as a fuel additive to gasoline. In the combustion process, ethanol reacts with oxygen to produce carbon dioxide and water vapor.Combustion reactions are exothermic reactions that release energy in the form of heat and light. They are commonly used in engines and power plants to produce energy from fuels. The energy released by the combustion reaction is used to generate electricity or to power machines and vehicles.

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We need 456.03 grams of AgNO3 to make 750 mL of a 4.5 M solution.

Mass can be defined as a dimensionless quantity representing the amount of matter in a particle.

To calculate the mass of AgNO3 needed to prepare 750 mL of a 4.5 M solution, we can use the following formula:

mass (in grams) = molarity x volume (in liters) x molar mass

First, we need to convert the volume of the solution from milliliters to liters:

750 mL = 750/1000 = 0.75 L

The molar mass of AgNO3 is:

AgNO3 = 107.87 g/mol + 14.01 g/mol + (3 x 16.00 g/mol) = 169.87 g/mol

Now we can substitute the given values into the formula:

mass = 4.5 moles/L x 0.75 L x 169.87 g/mol

mass = 456.03 g

Therefore, we need 456.03 grams of AgNO3 to make 750 mL of a 4.5 M solution.

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Answer: Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals.

Explanation:

Answer:

15.03 g/mol or any multiple of this, since this is the empirical formula

Explanation:

To find molar mass, look to the periodic table. C is carbon, which has a molar mass of 12.01 g/mol. H is hydrogen, which has a molar mass of 1.008 g/mol. You have one carbon and three hydrogens in this empirical formula, so 12.01 + 3(1.008) = 15.034 g/mol.The empirical formula is the lowest whole number ratio for the elements in a compound. Therefore the answer would be 15.03 g/mol or any multiple of this, since this is the amount for the empirical formula.

Answer:

Specific heat capacity

Oxygen gas has a partial pressure of 443 torr. He (Helium gas) has a partial pressure of 159 torr. The sample combination has a 1.10 L volume.

Partial pressures can be calculated in one of two ways: 1) To determine the individual pressure of each gas in a mixture, use PV = nRT. 2) Determine the proportion of pressure from the total pressure that may be assigned to each individual gas by using the mole fraction of each gas.

The partial pressures of the various gases are added to determine the total pressure of a gas combination.

Total pressure = 215+ 102+117= 443 torr, or 0.443 atm.

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Gas chromatography is a powerful analytical technique used to separate and identify different compound in a mixture.

It can be employed to identify unknown ignitable substances, such as accelerants commonly used in arson investigations. Here's how gas chromatography is used in this context:

1. Sample Collection: A suspected ignitable liquid sample is collected from the crime scene using appropriate techniques, such as solid-phase microextraction (SPME), headspace sampling, or liquid extraction. The sample is usually collected in an airtight container to preserve its integrity.

2. Sample Introduction: The collected sample is then introduced into the gas chromatograph instrument. This can be done by injecting a small quantity of the sample into a heated injection port, which rapidly vaporizes the liquid.

3. Separation: The vaporized sample enters the chromatographic column, which is packed with a stationary phase (such as a polymer or a porous material). The column is typically housed within an oven, and it is maintained at a precise temperature. The compounds in the sample interact differently with the stationary phase based on their chemical properties, resulting in their separation.

4. Carrier Gas: A carrier gas, usually helium or nitrogen, is continuously flowing through the column. This gas carries the vaporized sample compounds through the column, facilitating their separation. The choice of the carrier gas depends on the analytical requirements and instrument specifications.

5. Detection: As the separated compounds exit the column, they enter a detector. Flame ionization detector (FID) and mass spectrometry (MS) detectors are commonly used in gas chromatography for ignitable liquid analysis. The FID measures the ionization of hydrocarbon molecules, providing a qualitative and quantitative analysis. The MS detector provides additional information about the molecular structure of the compounds, enhancing identification accuracy.

6. Data Analysis: The detector generates a signal corresponding to the separated compounds, which is recorded and analyzed. Each compound in the sample produces a characteristic peak in the chromatogram, representing its retention time and relative abundance. The retention time is compared to known standards and databases to identify the unknown ignitable liquid. Mass spectral data from the MS detector can be used to confirm the identity of the compounds.

By comparing the retention times and spectral data of the unknown sample with those of known ignitable liquid standards, forensic analysts can identify the type or class of accelerant present in the sample. The process involves careful interpretation of the chromatographic data and consideration of retention time, peak shape, and spectral information to ensure accurate identification.

It's important to note that the analysis of ignitable liquids using gas chromatography is a specialized field, and the process may involve additional steps or techniques depending on the specific circumstances and requirements of the investigation.

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The polarity of a molecule depends on the distribution of electrons in its chemical bonds. Here are the polarity determinations for the given molecules: In summary, all four molecules have polar bonds, making them polar molecules.  

\(BF_3\): The molecule is polar because of the electron-withdrawing effect of the fluorine atoms, which makes the bond between the bromine and the central fluorine atom more polar than the bond between the bromine and the two fluorine atoms.

\(CS_2\): The molecule is polar because of the electron-withdrawing effect of the sulfur atoms, which makes the bond between the carbon and each sulfur atom more polar than the bond between the two carbon atoms.

\(SF_4\): The molecule is polar because of the electron-withdrawing effect of the sulfur atom, which makes the bond between the fluorine and the central sulfur atom more polar than the bond between the fluorine and the two sulfur atoms.

\(SO_3\): The molecule is polar because of the electron-withdrawing effect of the sulfur atom, which makes the bond between the oxygen and the central sulfur atom more polar than the bond between the oxygen and the two sulfur atoms.

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Answer:

Explanation:

289k ---- 11.8

257k ------ x (where x = volume at 257k)

x = \(\frac{257*11.8}{289}\)

x = 10.49 I

therefore at, 257k the balloon will have a volume of 10.49

By first vaporising the component and then condensing the vapour back into a liquid form, distillation purifies a compound.

The fundamental idea underpinning distillation is that different liquid mixtures may be distinguished by the difference in their boiling points. When a liquid's vapour pressure reaches atmospheric pressure, that temperature is known as the boiling point. This technique divides liquids into volatile and non-volatile categories.

It is then boiled after being placed in the RB flask. The more volatile or lower boiling point component evaporates more quickly and is collected in a different container. Condensation is accelerated with the aid of a condenser.

For instance, distillation can be used to separate a chloroform and aniline mixture. Aniline has a boiling point of 189°C while chloroform has a boiling point of 60°C. Thus, a mixture of chloroform and aniline can be separated by distillation.

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There are total three laws of newtons, first law of newtons, second law of newton and third law of newton. Therefore, for every action there is an equal and opposite reaction.

Newton's first law is also called law of inertia. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

Third law of newton states  that for every action there is an equal and opposite reaction.

Therefore, for every action there is an equal and opposite reaction.

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2.20 g (to 3 sig. figs.) the maximum mass of water that could be produced by the chemical reaction. round your answer to significant digits.

hexane is C6H14 or put another way, as in the question CH3(CH2)4CH3. Actually, it is incorrect as depicted in the question.Nonetheless..

2C6H14 + 19O2 ===> 12CO2 + 14H2O ... balanced equation

moled hexane present = 2.6 g x 1 mole/130 g = 0.02 moles

moles O2 present = 5.29 g x 1 mole/32 g = 0.165 moles

Which reactant is limiting? Hexane = 0.02/2 = 0.01; O2 = 0.165/19 = 0.0087

Thus O2 is limiting...

moles of H2O that can be produced =0.165 moles O2 x 14 H2O/19 CO2 = 0.122 moles H2O

Mass of water( H2O) = 0.122 moles x 18 gm/mole = 2.20 g (to 3 sig. figs.)

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Answer:

because its getting converted into another form of energy, as the puck is falling its increasing its velocity at a rate which decreases its potential energy and increases its frictional energy which then converts to kinetic energy as it hits an object or the floor.

Explanation:

Answer:

.

Explanation:

Cleaning supplies for spills should always be disposed of as hazardous trash. Therefore, it is necessary to store and package items like sorbent materials and cleaning supplies for the disposal of hazardous waste.

The term "equipment" most frequently refers to a group of items or other things that are regularly employed to accomplish a certain goal. Equipment needs vary depending on the work.

The plural form of the word equipment is absent. There is no term "equipments," it is only used in the singular, and it goes with a singular verb. There are about 100 common words in this category, which are referred to as "noncount nouns" or "mass nouns."

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The group of elements in which Argon placed along with Neon and helium is called Noble gases.

Noble gases can be demonstrated as the 6 elements that belong to group 18 of the modern periodic table. These 6 elements in group 18 are Helium, Neon, Argon, Krypton, Xenon, and Radon.

Under standard conditions of pressure and temperature, all noble gases exist in the gaseous form and exhibit extremely low chemical reactivity therefore they are named inert gas.  All the noble gases possess stable electronic configurations as their valence shell are fully filled. Therefore, the elements are found in monoatomic gases.

The general configuration of the noble gases can be represented as ‘ns²np⁶’ where n is the principal quantum number.

Therefore Argon is a noble gas so they have completely filled electronic configurations, and very little tendency to lose or gain an electron or inert nature.

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