Select the step(s) that will compose rationale for the cation Ag+ being absent in an unknown (but Pb+2 is present}: Select one or more: - A whlte precipitate did not form step 2-B. - A lack of dark blue colored solution after addition of 15 M NH3- A yellow precipitate did not form when K2CrO4 was added in step 1-C - All of the white precipitate from step 1-A dissolved in hot water. - A reddish brown precipitate did not form after adding KFe(CN}6.- The white solid did not turn black upon addition of NaOH and SnCl2- The white precipitate from step dissolved in 6M NH3 and then reformed when 6 M HNO3 was added- No white precIpitate formed when 6 M HCI was added t0 the unknown solution In step 1-A - The presence of a Ilght blue decantate in step

Amines are the organic bases that react with acids and form ammonium salts.

Amines are Lewis bases. according to Lewis acid are the electron pair acceptor and bases are the electron pair donor. Amines are that contains a nitrogen atom connected to other groups with the single bond. Amine group has as lone pair of electrons. so. amines can donate the lone pair of electrons to the other molecules. so. amines are the bases or the Lewis bases. Amines are the weak bases. Amines are the derivative of ammonia.

Thus, Amines are the organic bases that react with acids and form ammonium salts.

To learn more about Amines here

https://brainly.com/question/28167507

#SPJ4

5.52×10^20 SO3 molecules have a mass of 7.41 g.

Sulfur (S) atomic mass = 32.06 g/mol

Oxygen (O) atomic mass = 16.00 g/mol (there are 3 oxygen atoms in SO3)

Molar mass of SO3 = (32.06 g/mol) + (3 × 16.00 g/mol) = 80.06 g/mol

The molar mass of SO3 is 80.06 g/mol.

n = 5.52×1020 molecules / 6.022×10^23 molecules/mol = 0.092 mol

moles = mass/molar mass

=> mass = moles * molar mass

m = 0.092 mol * 80.06 g/mol = 7.41 g

Therefore, 5.52×10^20 SO3 molecules have a mass of 7.41 g.

To learn more about moles :

https://brainly.com/question/29367909

#SPJ11

To convert the number of SO3 molecules to grams, you need to multiply by the formula mass of SO3 and convert using conversion factors.

To convert the number of SO3 molecules to grams, you need to first find the formula mass of SO3 and then use the given number of molecules to calculate the mass. The formula mass of SO3 is 80.06 g/mol, which means that one mole of SO3 weighs 80.06 grams. Since there are 6.02 x 1023 molecules in one mole, you can use this conversion factor to convert the given number of molecules to grams:

(5.52 x 1020 SO3 molecules) x (1 mole/6.02 x 1023 molecules) x (80.06 g/1 mole) = 7.28 x 10-3 grams

Therefore, the answer is 7.28 x 10-3 grams, rounded to three significant figures.

https://brainly.com/question/37835875

#SPJ12

Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

Answer:

product

Explanation:

The Co(II) center in vitamin B12 has an electronic configuration of d^7.

This means that there are seven electrons in the d orbitals of the cobalt ion.

The electron configuration of an element describes how electrons are distributed in its atomic orbitals

The electronic configuration of the cobalt ion can be determined by considering its atomic number (27) and the fact that it has lost two electrons to form the Co(II) ion. The electronic configuration of neutral cobalt (Co) is [Ar] 3d^7 4s^2. When two electrons are removed to form the Co(II) ion, the 4s^2 electrons are lost, leaving a d^7 electronic configuration.

In vitamin B12, the Co(II) ion is coordinated to a corrin ring and a nucleotide. The d^7 electronic configuration of the Co(II) center plays an important role in the function of vitamin B12 as a cofactor in several enzymatic reactions.

To know more about electronic configuration , refer here:

https://brainly.com/question/31580941

#SPJ11

It is more effective to perform an extraction with several small portions of solvent as opposed to one large portion of solvent of equal volume because the amount of the material left in the trash will be less.

The extraction of certain ratio of the solute is able to the distribute among the phases during each extraction. The various extractions with the lesser amounts of the solvent are more efficient than the single extraction with the huge amount of solvent.

The extraction is about to maximize the outside field of the communication between the two solvents, we can easily get the more surface area in the contact with the fewer amounts.

To learn more about extraction here

https://brainly.com/question/14522836

#SPJ4

Different Fossil organisms succeed one another to go up through the different rock layers in a definite and determinable order. Therefore, any time period can be recognized by its fossil content

Explanation:

Different Fossil organisms succeed one another to go up through the different rock layers in a definite and determinable order. Therefore, any time period can be recognized by its fossil content

The mass of one mole of sodium is determined to be c. 22.99 g

In chemistry, the atomic mass of an element can be described as the average mass of the atoms of an element measured in the atomic mass unit.

Sodium is a soft, silvery-white, highly reactive metal with an atomic mass of 22.989amu or 22.99 amu

The atomic mass of a compound or element, measured in amu, is the same as the mass in grams of one mole of that element.

As the atomic mass of sodium is found to be  22.99 amu, therefore, one mole of sodium atom would weigh or in other words, will have a mass of 22.99 grams.

To learn more about atomic mass; click here:

https://brainly.com/question/338808

#SPJ4

Answer:

N2020

Explanation:

I’m not fully sure but I’m pretty sure it’s wrong

Answer:

the smallest thing in the world

Explanation:

Answer:

It is the smallest particle of the elements that exists ob the earth

The density of 55.3 lbs/ft³ is 0.884 g/mL.

To convert density from pounds per cubic foot (lbs/ft³) to grams per milliliter (g/mL), we can use the following conversion factors:

1 pound = 453.59237 grams

1 foot = 30.48 centimeters (cm)

1 inch = 2.54 centimeters (cm)

1 milliliter (mL) = 1 cubic centimeter (cm³)

First, we convert pounds to grams:

55.3 lbs = 55.3 lbs * 453.59237 g/lb = 25050.364 grams

Next, we convert cubic feet to milliliters:

1 ft³ = (30.48 cm)³ = 28316.8466 cm³

1 cm³ = 1 mL

Finally, we calculate the density in g/mL:

Density = (25050.364 g) / (28316.8466 mL) ≈ 0.884 g/mL

Therefore, the density of 55.3 lbs/ft³ is approximately 0.884 g/mL.

Learn more about density from the given link

https://brainly.com/question/1354972

#SPJ11

The concentration of the koh solution content loaded when 15.00 ml of 0.500 m h2so4 is titrated with 17.70 ml of potassium hydroxide is 0.848 M (Approx.)

To determine the concentration of the KOH solution when 15.00 mL of 0.500 M H2SO4 is titrated with 17.70 mL of potassium hydroxide, follow these steps:

1. Write the balanced chemical equation: H2SO4 + 2KOH -> K2SO4 + 2H2O

2. Calculate the moles of H2SO4: moles = Molarity × Volume (in liters)
moles_H2SO4 = 0.500 M × 15.00 mL × (1 L / 1000 mL) = 0.0075 moles

3. Determine the moles of KOH: From the balanced equation, 1 mole of H2SO4 reacts with 2 moles of KOH, so
moles_KOH = 2 × moles_H2SO4 = 2 × 0.0075 moles = 0.015 moles

4. Calculate the concentration of KOH: Molarity = moles / Volume (in liters)
M_KOH = 0.015 moles / (17.70 mL × (1 L / 1000 mL)) ≈ 0.848 M

So, by calculating, the concentration of the solution results in approximately 0.848 M.

To know more about the titration refer here :

https://brainly.com/question/31271061#

#SPJ11

Answer:

\(V_{2} = 29.28\,L\)

Explanation:

Let assume that gas behaves ideally and experiments an isobaric and isothermal processes. The following relationship is applied to determined the final volume:

\(\frac{V_{1}}{n_{1}} = \frac{V_{2}}{n_{2}}\)

\(V_{2} = V_{1} \cdot \left(\frac{n_{2}}{n_{1}} \right)\)

\(V_{2} = (12.2\,L)\cdot \left(\frac{16.8\,moles}{7\,moles} \right)\)

\(V_{2} = 29.28\,L\)

Answer:Hi! I hope this will help you with your question, whether this is an assignment or not. The answer that I get is 0.033 concentration.

If 0.0025 mol NaNo3 forms during the reaction, the concentration of NaNO3 in the final solution should be 0.033.

Explanation:

Fluorine does not show exceptional electronic configuration because it does not have any d orbitals to move electrons to. It achieves stability by forming covalent bonds with other atoms.

Fluorine, with an atomic number of 9, has a configuration of 1s2 2s2 2p5. It is one electron short of having a full outer shell, which would make it highly stable. However, fluorine does not show exceptional electronic configuration despite this fact. This is because the exceptional electronic configuration occurs when an electron from the s orbital moves to the d orbital to achieve greater stability. However, fluorine does not have any d orbitals. Its highest energy level is the p orbital, which already has 3 electrons. Therefore, fluorine cannot attain a greater degree of stability by moving an electron to the d orbital. Instead, fluorine achieves stability by forming a covalent bond with another atom, such as hydrogen or another fluorine atom. This sharing of electrons allows fluorine to achieve a full outer shell and become highly stable.
for more questions on stability
https://brainly.com/question/2050643

#SPJ11

Answer:

Approximately 7.65

Explanation:

math.

skillz.

For the hypothetical atom with a mass number of 85 and an atomic number of 44, a real atom of this isotope (Ruthenium) would have:

Protons (p) = 44

Neutrons (n) = 41

Electrons (e) = 44

The hypothetical atom with a mass number of 85 and an atomic number of 44 represents an isotope of the element Ruthenium (Ru). To determine the number of protons, neutrons, and electrons in a real atom of this isotope, we need to understand the atomic structure.

The atomic number (Z) represents the number of protons in an atom. Since the atomic number is given as 44, the number of protons (p) in the atom is 44.

The mass number (A) represents the total number of protons and neutrons in the nucleus of an atom. In this case, the mass number is given as 85. Therefore, the number of neutrons (n) can be calculated by subtracting the atomic number (protons) from the mass number:

Neutrons (n) = Mass number (A) - Atomic number (Z)

Neutrons (n) = 85 - 44

Neutrons (n) = 41

To determine the number of electrons (e), we assume that the atom is neutral, meaning it has an equal number of protons and electrons. Therefore, the number of electrons is also 44.

For more such question on isotope visit;

https://brainly.com/question/14220416

#SPJ8

Explanation:

atomic number=88

atomic number =4

why is Ra larger than Be

hope it helps:)

The -OH on the end of the pentanol molecule will affect the surface tension as it will be higher as that of as pentane or hexane.

This is referred to as the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid.

It minimizes the surface area and the higher strength of the intermolecular force is present in the pentanol therefore the surface tension of the pentanol is more than surface tension of the pentane and hexane.

Read more about Surface tension here https://brainly.com/question/138724

#SPJ1

Answer:



Explanation:

To determine the number of moles of Fe2O3 that can be formed by reacting 3.2 moles of iron (Fe), we need to first write and balance the chemical equation for the reaction between iron and oxygen (O2) to form Fe2O3:

4Fe + 3O2 → 2Fe2O3

From the balanced equation, we see that 4 moles of Fe react with 3 moles of O2 to produce 2 moles of Fe2O3. This means that the mole ratio of Fe to Fe2O3 is 4:2, or simply 2:1.

To find the number of moles of Fe2O3 formed from 3.2 moles of Fe, we can use the mole ratio from the balanced equation:

moles of Fe2O3 = 2/4 x 3.2 moles

moles of Fe2O3 = 1.6 moles

Therefore, 1.6 moles of Fe2O3 can be formed by reacting 3.2 moles of iron.

After 93.8 hours have passed, 11.6 mg of gallium-67 remains from 46.4 mg of this gallium-67.


The half-life of gallium-67 is 78.2 hours, which means that every 78.2 hours, half of the original amount of the isotope will decay. Using this information, we can determine how much gallium-67 will remain after 93.8 hours have passed.
First, we need to determine how many half-lives have passed in 93.8 hours. We can do this by dividing 93.8 hours by the half-life of gallium-67:

93.8 hours ÷ 78.2 hours/half-life = 1.2 half-lives

This means that 1.2 half-lives have passed, and we can calculate how much gallium-67 remains using the formula:
Amount remaining = (Initial amount) x (1/2)^(number of half-lives)

Plugging in the values we have:

Amount remaining = (46.4 mg) x (1/2)^(1.2) = 11.6 mg

Therefore, after 93.8 hours have passed, 11.6 mg of gallium-67 remains.

Learn more about half-life here:

https://brainly.com/question/24710827

#SPJ11

The SQL query below retrieves all the data in the PRODUCT table.SELECT * FROM PRODUCT;

SQL stands for Structured Query Language and is a programming language used to manage relational databases. SQL is used to execute a variety of operations on a database, such as inserting data, updating existing data, and deleting data.

SQL is used to communicate with a database and is the standard language for managing databases. SQL is used to interact with databases such as MySQL, Oracle, MS SQL Server, SQLite, etc.

PRODUCT is the name of a table in a database that stores product information. The PRODUCT table contains information about a company's products, such as product codes, names, descriptions, and prices. SQL is used to perform operations on the PRODUCT table such as SELECT, INSERT, UPDATE, and DELETE.SQL QueryThe SQL query to select all data in the PRODUCT table is:SELECT * FROM PRODUCT; the

Learn more about query language at

https://brainly.com/question/24180759

#SPJ11

Answer:

Q = 33105.6 J

Explanation:

Given that,

Mass of water, m = 88 grams

The temperature raised from 48°C to steam at 138°.

We need to find the energy required to raise the temperature. The formula for the energy required is given by :

\(Q=mc\Delta T\)

Where

c is specific heat of water, c = 4.18J/g °C

So,

\(Q=88\times 4.18\times (138-48)\\\\Q=33105.6\ J\)

So, the required energy is 33105.6 J.

It is important to heat the melting point apparatus or the block slowly, when the temperature gets close to the melting point is

The melting point of the  substance is the temperature at which the substance changes the state from the solid to liquid. When heat energy is provided to substance it will changes from the solid phase to the liquid phase. So, it is important to add the heat energy slowly because when the substance changes a phase then it will absorb the much energy till it reaches up to the melting.

Therefore the heat will be provided slowly. The slow heating will provide the more accurate reading of the melting point.

To learn more about melting point here

https://brainly.com/question/16815101

#SPJ4

Answer:

11.01

Explanation:

because yes :)

For each half-life, the total amount of the isotope is divided by 2.

Therefore, the amount of parent isotope that remains after:

1 half-life is ½= 0.5

2 half-lives= 2/4= 0.5

3 half-lives= 3/6= 0.5

What is an isotope?

To know more about isotopes, click the link given below:

https://brainly.com/question/11394246

#SPJ4

The constituents of petroleum that are used for the following purposes are as follows:

The constituents of petroleum are LPG, bitumen, paraffin wax, lubricating oil, kerosene, diesel, etc. These compounds are a mixture of hydrocarbons.

Therefore, each constituent of petroleum that is used for the following purposes is mentioned above with proper names.

To learn more about constituents of petroleum, refer to the link:

https://brainly.com/question/17023299

#SPJ1

Some people practice brining their turkey. This means they let it soak in a solution overnight. The solution diffuses into the turkey. This means that the turkey is placed into a hypertonic solution.

A hypotonic solution is described as a solution that has lower osmotic pressure than another solution to which it is compared.

The concept of tonicity helps us understand that the saltwater we use to brine the turkey is typically considered hypertonic solution because it has a greater concentration of solutes than the liquid found inside the cells.

Learn more about hypertonic solutions at: https://brainly.com/question/4237735

#SPJ1

an electronic interaction that stabilizes alkenes and carbocations and results from overlap of a vacant p orbital on one atom with the neighboring c-h sigma bond is known as Hyperconjugation.

The delocalization of the sigma electrons in the C-H bond of an alkyl group coupled to an atom in an unsaturated system or to an atom with an unshared p orbital is known as hyperconjugation, which is a general stabilizing interaction. When a suitable attacking reagent is present in an organic molecule, electron displacement happens.

To know more about alkyl group visit

https://brainly.com/question/6846666

#SPJ4

Answer:

347.4 (19.3 mole)

Explanation:

CH4 + 2O2 = CO2 + 2H2O

1(mole) - 9.65(mole)

2(mole) - x ⇒x = 9.65*2=19.3

m=n*M ⇒ m= 19.3*(1*2+16)= 19.3*18=347.4(g)