Which compound has the lowest solubility in pure water? Select one: a. Ag2C204, Kep-10x 10-11 b. PbCh, Ksp 1.7x 10-5 O c. FePO4, Ksp 1.3 x 10-22 d. Cas(PO)2, Ksp 1.2 x 10-26 x e. MgF2, Ksp 6.9 x 10-9

answer

1.1 Carbon is the sixth element in the periodic table.

(IV A)

1.2 electric configuration: O⁸ (He²) 2s² 2p⁴ .

atomic number: 8

1.3 protons= 8 , electron = 7

1.4 oxygen has 6 valence electrons .

carbon has 4 valence electrons.

1.5 the answer is in the photo.

The statement "the cage size of the zeolites is in the centimeters scale" is False.

Zeolite is a crystalline and porous alumino-silicate mineral consisting of hydrated alkaline metals and alkali earth metals. These minerals have microporous structures that make them useful in industrial and medical applications, among other things. They have a diverse array of applications, including as catalysts, adsorbents, and molecular sieves. Zeolites are minerals that have a unique framework that is capable of trapping and holding a variety of molecules within their microporous structure.

Zeolites are small in size, typically between 0.3 and 2 microns. The cavities or pores within these crystals, known as cages, are in the range of 4 to 12 Angstroms in size (1 Angstrom = 0.1 nm). These cavities are small, which allows the zeolite to selectively filter molecules based on their size, shape, and chemical properties.}

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Answer:

Just Try ur best ok

Explanation:

Answer:

79.7 g He

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

1.20 × 10²⁵ atoms He

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of He - 4.00 g/mol

Step 3: Convert

\(1.20 \cdot 10^{25} \ atoms \ He(\frac{1 \ mol \ He}{6.022 \cdot 10^{23} \ atoms \ He} )(\frac{4.00 \ g \ He}{1 \ mol \ He} )\) = 79.7077 g He

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

79.7077 g He ≈ 79.7 g He

Answer:

six

Explanation:

check your periodic table

To solve this we must be knowing each and every concept related to cell. Therefore, the mass of DNA the scientist should obtain from a haploid human cell is  0.956.

In biology, a cell is a basic lattice unit that houses the essential components of life and is made up from which all living organisms are made. A single cell, for example a bacterium or yeast, is frequently a full organism in and of itself. As cells age, they develop specific roles.

These cells collaborate with some other specialized cells to form the foundation of huge multicellular creatures like humans and other mammals. Despite being far larger than atoms, cells are nonetheless incredibly tiny. A scientist obtained a mass of 0.0062 nanogram of dna from a diploid human cell. The mass of DNA the scientist should obtain from a haploid human cell is  0.956.

Therefore, the mass of DNA the scientist should obtain from a haploid human cell is 0.956.

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The difference between a solution and a suspension is in the particle sizes involved. A solution is a mixture of ions or molecules (very, very small). Solutions are transparent, meaning that you can see through them. A suspension has bigger particle sizes and so it may look cloudy or murky

To calculate the ratio of uranium-235 to lead-207 atoms in the mineral sample, we can use the atomic masses and the concept of radioactive decay.

The ratio of uranium-235 to lead-207 atoms in the mineral sample is 1:3.The atomic mass of uranium-235 (U-235) is approximately 235 atomic mass units (amu), while the atomic mass of lead-207 (Pb-207) is approximately 207 amu.

Given:

Number of uranium-235 atoms = 50,000

Number of lead-207 atoms = 150,000

To find the ratio, we divide the number of uranium-235 atoms by the number of lead-207 atoms:

Ratio = Number of uranium-235 atoms / Number of lead-207 atoms

Ratio = 50,000 / 150,000

Simplifying the ratio:

Ratio = 1/3

Therefore, the ratio of uranium-235 to lead-207 atoms in the mineral sample is 1:3.

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The reading “Foil Fuel” from Leon 12 discusses the environmental and economic benefits and drawbacks of foil fuel. The environmental benefits of foil fuel are vast. It is a clean energy source with no emissions, making it a viable alternative to traditional fossil fuels. Additionally, foil fuel is extremely efficient, requiring less energy to produce than other available options.

Economically, foil fuel has the potential to be an affordable energy source. It is much less expensive to mine and process than traditional fossil fuels, and it can be used in a variety of applications. Additionally, because of its renewable nature, it is expected to have a long shelf-life and provide reliable energy for many years.

However, there are also some drawbacks to using foil fuel. For one, it is difficult to extract and process, requiring expensive machinery and highly skilled workers. Additionally, it is also not available in large quantities, which means that supply shortages are possible. Finally, its impact on the environment is still uncertain and more research needs to be done in order to fully understand its effects.

In my opinion, I believe that foil fuel mining will continue to increase over the next 50 years and will become an important part of the global energy mix. It is a clean, efficient, and affordable source of energy that has the potential to revolutionize the energy industry.

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Average Kinetic energy of solution is high, the temperature of the solution is higher than original  solution.

Option A is correct.

An object's or a particle's motion gives it kinetic energy, a type of energy. When a net force is applied to an object, which is work that transfers energy, the object accelerates and gains kinetic energy.

The capacity for work is perhaps kinetic energy's most significant property. Work is defined as force exerted in the direction of motion on an object. Energy and work are so intertwined that they are interchangeable. Either of the following methods can be used to obtain the kinetic energy: the effort required to stop any moving object. How much work done in giving the speed to the body from the condition of rest.

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As a marketing consultant, my primary goal is to assist my clients in developing effective promotional campaigns that generate the most sales possible.

As a marketing consultant, my primary goal is to assist my clients in developing effective promotional campaigns that generate the most sales possible. During my appointments with my two new clients, I will work closely with them to understand their business objectives, target market, and budget. Based on this information, I will recommend promotional strategies that are tailored to their specific needs and goals.

To generate the most sales, it is important to use a mix of promotional tactics that will reach potential customers through multiple channels. This can include a combination of online and offline advertising, social media marketing, email campaigns, and events. It is also important to focus on the unique selling points of each client's business and emphasize those in all promotional materials.

Ultimately, the key to generating the most sales is to have a clear understanding of the target audience and how to reach them effectively. By working closely with my clients, I will help them make informed decisions about their promotional strategies and create campaigns that drive results.

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Answer:

A little island of remnant sandstone sits on Mount Moran's summit. Sediments were deposited as sea levels rose throughout the planet, beginning with beach sands (the Flathead Sandstone that sits atop Mount Moran), followed by limestones deposited in shallow waters, and finally mudstones that made up the deeper ocean bottom.

Explanation:

Answer:

20.76 L OF CO2 WILL BE PRODUCED BY 45 G OF METHANE.

Explanation:

Equation of the reaction:

CH4 + 02 --------> CO2 + 2H20

Molar mass of methane = ( 12+ 1*4) g/mol = 16 g/mol

Calculate the number of moles present in 45 g of methane

1 mole of methane = 16 g / mol of methane

(45 / 16) mole of methane = 45 g of methane

= 2.8125 moles

Using the ideal gas equation:

PV = nRT

P = 1 atm

n = 2.812 moles

T = 90 C

R = 0.082 L atm/ mol C

V = unknown

So we have:

V = nRT / P

V = 2.8125 * 0.082 * 90 / 1

V = 20.756 L

In the production of CO2 by 45 g of methane, 20.756 L of methane was used.

Then, the volume of CO2 produced by this volume will be 20.756 L since 1 mole of methane produces 1 mole of CO2.

In other words;

1 mole of CH4 = 1 mole of CO2

22.4 dm3 of CH4 = 22.4 dm3 of CO2

20.76 DM3 = 20.76 dm3

The volume of CO2 produced will therefore be 20.76 L

Answer:C

Explanation:

Answer:

Proton (p for positive): Positive +1 charge, relative mass of 1

Neutron (sounds like neutral): no charge, relative mass of 1

Electron (sounds like electric): negative charge, relative mass of 0.0005

2.49 x \(10^{-4}\) moles is equal to 1.5×\(10^{20}\). The number of moles is equal to the number of molecules divided by Avogadro's number, 6.022×\(10^{23}\).

This means that 1.5×\(10^{20}\)moles are equal to

1.5×\(10^{20}\)/6.022×\(10^{23}\)

0.24908×\(10^{-3}\)

2.49 x \(10^{-4}\) moles.

Avogadro's number: Avogadro's number is a constant used in chemistry to represent the number of atoms or molecules in a mole of a substance. It is equal to 6.022 x \(10^{23}\). Or we can say that Avogadro's number is, the number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.02214076 × 1023. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction.

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The volume occupied by a  21.8 g sample of osmium having a density of 22.6 g/cm3 is  0.965cm3.

The density formula is:

                           Density = mass/volume

To find volume:

                           Volume = mass/density

Now

mass = 21.8 g

density= 22.6 g/cm3

Putting the values

                        Volume = 21.8/22.6

                        volume = 0.965cm3

Thus the volume is 0.965cm3.

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The volume occupied of the sample of osmium  with a density of 22.6 g/cm³  and a mass of 21.8 g is: 0.9646 cm³

The density formula and the procedure we will use is:

d = m/v

Where:

Information about the problem:

Applying the density formula and clearing the volume we get:

d = m/v

v = m/ d

v = 21.8 g / 22.6 g/cm³

v = 0.9646 cm³

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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The concentration of H2SO4 will be 0.31 M.

We have the balanced chemical equation:

                      H2SO4 (aq)+ 2NaOH(aq) → K2SO4 (aq) +2H2O (l)

We first find out the moles of the base used, which is sodium hydroxide in this case. We would use the formula:

                                                      c=n x v

n is the number of moles

v is the volume of solution

And so,

n =c x v

  =0.235 M 0.045

L=0.235 molL⋅0.045

L=0.010575mol

So, we got

0.010575

moles of base. From the equation, one mole of acid neutralizes two moles of base, so here, we would need:

0.010575 mol

=0.005287 mol

Now, we find the concentration of the solution of acid. And so,

       c =n v

          =0.0052875 mol

0.017L ≈0.31 mol/L

           =0.31 M

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Incomplete question but using assumed values, the volume of m potassium dichromate solution that contains potassium dichromate is 9.1L

To calculate the volume of solution, we use the equation for molarity of solution:

Molarity of solution = mass of solute/molar mass of solute*volume of solution (in liter)

Where assumed values are:

Molarity of solution = 0.15 M

Given mass of potassium dichromate = 400. g

Molar mass of potassium dichromate = 294.15 g/mol

Volume solution in liter = x

i.e.

0.15 = 400/294.15*x

Volume of solution in liter = 400/294.15*0.15

Volume of solution in liter = 400/44.12

Volume of solution in liter = 9.06

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The theoretical yield of NH3 is 10.03 g and percent yield is 10.56%

The theoretical yield is obtained from the eequation if reaction.

The equation of the reaction is given below:

moles of reactants and products:

moles of H2 = 1.77/2 = 0.885 moles

moles of N2 = 25.7/28 = 0.918 moles

moles of NH3 = 1.06/17 = 0.062

From the equation of the reaction, H2 is the limiting reactant

3 moles of H2 produces 2 moles of NH3

0.885 moles of H2 will produce 2/3 × 0.918 = 0.59 moles of NH3

Therefore:

theoretical yield = 0.59 × 17

theoreticalyield = 10.03 g of NH3

Percent yield = 1.06/10.03 × 100%

percent yield = 10.56%

Therefore, the theoretical yield is 10.03 g and percent yield is 10.56%.

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Color of apple and cranberry juice is yellow and red respectively as the two colors of  juices are different each color has it's own λ max according to Beer's law and hence apple juice contributes to  color of cranberry-apple juice .

The Beer's law states that the absorbance is directly proportional to the concentration of a solution that is,A∝C .Most substances follow Beer's law from low to moderate temperature ranges only.It is not followed well in case of saturation effects which are present in highly concentrated samples.

Due to the direct relation between absorbance and concentration , absorbance is preferred over transmittance for recording the spectra.

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Answer:

3fe s )+ 4h2o G )= fe3o4 s )+ 4h2 G

Explanation: 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) (i) Iron metal is getting oxidised. (ii) Water is getting reduced. (iii) Water is acting as reducing agent.

Explanation:

i make a search

Answer:

Plastics are synthetic material that is made by natural material.

(I) is correct option.

Explanation:

Given that,

The statements are,

(I). It is a synthetic material that comes from natural resources.

(II). It is a synthetic material that does not come from natural resources.

(III). It is a natural material that is made from synthetic resources.

(IV). It is a natural material made from natural resources.

We know that,

Plastic :

Plastics are organic polymers of high molecular mass and often contain other material.

They are usually synthetic which is get from petrochemicals.

Through the polymerisation process, we get plastics from natural materials like, coal, natural gas, salt and crude oil.

So, We can say that, plastics are synthetic material that is made by natural material.

Hence, Plastics are synthetic material that is made by natural material.

(I) is correct option.

Answer:

a chain of repeating compounds found in both natural and synthetic materials

Explanation:

Not all polymers are natural materials.

Answer:

Dark matter was first suspected in clusters of galaxies when the galaxies were found to move with too high a speed to be retained in the cluster by their gravitational influence on each other

Answer:

Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe. Dark matter is called "dark" because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect, or emit electromagnetic radiation and is, therefore, difficult to detect.

Answer:

I think the answer is c)

Explanation:

The mass fraction of the solute in the solution, given that 89 g of sodium nitrate is dissolved in the solution is 0.279

The following data were obtained from the question:

Mass fraction of solute = mass of solute / Total mass of solution

Inputting the given parameters, we have:

Mass fraction of solute = 89 / 319

Mass fraction of solute = 0.278

Thus, from the above calculation, we can conclude that the mass fraction of the solute is 0.279

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Answer

moles = 5.81 mol

Explanation

Given:

Volume = 144 L

AT SATP

1 mole = 24.4651 L

Solution:

1 mole = 24.4651 L

x mole = 144 L

x = 144/24.4651

x = 5.8 mol