The carbonate ion concentration is gradually increased in a solution containing divalent cations of Mg^2+, Ca^2+, and SI^2+ at the same concentration. Which of the following will form last? (a) MgCo3, Ksp. = 1 x 10-5 (b) CaCO3, Ksp = 8.7 x 10^-9 (c) SrCO3, Ksp = 7 x 10-10 A. CaCO3 will be the last to precipitate, it has the largest Ksp value B. MgCO3, will be the last to precipitate, it has the largest Ksp value C. SrCO3, will be the last to precipitate, it has the smallest Ksp value

Answer:

The Rock Cycle & Classification of Rocks

The rock cycle is the formation, breakdown and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. The rock cycle is an illustration that is used to describe how the three rock types are related and how Earth processes change a rock from one type to another over time. Each group contains a collection of rock types that differ from each other on the basis of the size, shape and arrangement of mineral grains. Due to the driving forces of the rock cycle, plate tectonics and the water cycle, rocks are forced to change as they encounter new environments as they do not remain in equilibrium.

Explanation:

polymerization <David Dennis>/<ed. AR>

The repeating units formed from small molecules known as monomers are bonded together to form a massive single chain-like molecule known as a polymer.Polymerization is the process through which monomers are converted into polymers.Ethylene, for instance, polymerizes to create polyethylene.

A polymer is created when a lot of monomeric units react with one another during the polymerization process.The end products of polymerization might be either linear or branched macromolecules. Additionally, they can take the form of a sophisticated, three-dimensional network.

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we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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lithification is a complex process where sediments are compact under pressure, expel connate fluids and converted into solid rock.

A rock is the collection of solid (grains) mineral materials that grow or become cemented together. it can be a natural substance composed of solid crystals of different minerals that have been blend together into a solid lump.

The major types of rocks are:

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Answer:

2.3531 cm³ Cu

Explanation:

To find the volume of the copper, you need to multiply the given mass (g) by the density. You can use the denisty to convert between g and cm³ because denisty is a ratio that represents the mass of copper per every 1 cm³. It is important to arrange this ratio in a way that allows for the cancellation of units (grams should be in the denominator to cancel the units of the given mass). The final answer should have 5 sig figs like the given mass (21.084 = 5 sig figs).

Density = 8.96 g/cm³

  21.084 g Cu               1 cm³
----------------------  x  ------------------  =  2.3531 cm³ Cu
                                    8.96 g

Potential energy is stored energy in an object. Potential energy is the product of mass of an object, acceleration due to gravity and height of an object where it is placed.

Potential energy = mgh

m = mass of an object

g = acceleration due to gravity

h =  height of an object

The S.I. unit of potential energy is joule and is represented by J.

Kinetic energy is energy of an object due to its movement. Kinetic energy is the product of mass of an object and velocity of an object shown by :-

Kinetic energy = 1/2 mv²

m = mass of an object

v = velocity of an object

The S.I. unit of kinetic energy is joule and is represented by J.

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Answer

In dialysis only the solvent travels through the semipermeable membrane

Explanation

Here, we want to select the correct statement

Firstly, we need to get the difference between the two

While osmosis involves fluid movement from a region of higher concentration to lower across a semi-permeable membrane, dialysis seeks to establish equality in volume.

We can see that while osmosis in acheiving concentration balance, osmosis is acheiveing volume balance

Thus, the correct answer choice here is that :

"In dialysis, only the solvent travels through the semipermeable membrane"F

Answer:

because it absorbs all colours expect for red,

Explanation: making the red light bounce into your eyes, therefore seeing the colour red

Question 2: The wave transfers its energy to the mineral, I think, thats my best guess

Answer = 5.069%

Explanation:

mass of solute (kcl) = 4g

mass of solution = volume/ density

= 78.9/1

=78.9

we know,

weight/weight% =( mass of solute/ mass of solution)× 100%

= (4÷78.9)×100

= 5.069%

There are approximately 0.16 moles of gas present in the lungs.

To solve this problem, we can use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:

PV = nRT

where R is the gas constant.

First, we need to convert the temperature to Kelvin:

T = 37°C + 273.15 = 310.15 K

Next, we can plug in the given values:

P = 1.0 atm

V = 4.0 L

T = 310.15 K

We also need to find the value of R, which depends on the units we are using for pressure, volume, and temperature. In this case, we are using atmospheres, liters, and Kelvin, so we can use the value:

R = 0.08206 L·atm/K·mol

Now we can rearrange the ideal gas law to solve for the number of moles:

n = PV/RT

n = (1.0 atm)(4.0 L)/(0.08206 L·atm/K·mol)(310.15 K)

n = 0.1638 mol

Therefore, there are approximately 0.16 moles of gas present in the lungs.

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Answer:

CnH2n

Explanation:

Alkenes are either branched or unbranched hydrocarbons with at least one carbon–carbon double bond (CC) and have a general formula of CnH2n.

The words which will help him make his search for various types of plants on the Internet easier and faster is “different types of plants” and is denoted as option D.

This is defined as the process in which something is sought for carefully through the use of different types of techniques so as to make it easier.

In the case of Mark looking for information on various types of plants, the best words to type will make his search on the Internet easier and faster is “different types of plants” as it contains all the necessary keywords which is used by the search engine to bring out the result.

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Answer:

See below.

Explanation:

Different types of bond models, different interactions of particles in the inner structures.

For sodium metal,

The basic particles, the unit, is metal sodium. So the interaction is originated from metal and metal. We call this interaction, metal, atom-atom interaction.

For sodium chloride,

The basic particles, is 2 different ionic particles, positive particle (sodium, Na+), and negative particle (chloride, Cl-). We call this interaction, ionic-ionic interaction.

So, different interactions, different structures, thus, finally, different binding models.

Answer:

Please mark me brainliest

Explanation:

The answer is false.

opaque materials do not reflect any light because they absorb or trap all light that comes in contact with them. No light is able to return from within an opaque material or reflect off its inner surface. Opaqueness is defined by a lack of light reflection, transmission or scattering. Light either disappears or is converted into other forms of energy within opaque substances.

Please let me know if this helps explain why opaque materials do not reflect light or if any part of the description is unclear. I can also provide any additional examples or details if needed.

Answer: 19) False. A totally opaque material does not let any light pass through it.

Answer: Cathode rays are made up of negatively charged particles.

Atoms contain negatively charged particles.

The Ksp of Cu²⁺ is 1.8x10–7.

The solubility product regular, Ksp​, is the equilibrium steady for a strong substance dissolving in an aqueous solution. It represents the level at which a solute dissolves in solution. The greater soluble a substance is, the better the Ksp price it has.

Calculation:-

Cu(OH)₂ solid ⇔ Cu²⁺ (aq) + 2OH⁻(aq)

∴ Ksp = [Cu²⁺].[OH⁻]²-------------------------(1)

Now, 1 mole Cu(OH)₂ dissolves in water to give 1 mol Cu²⁺ and 2 moles OH⁻ ions.

So, if we consider [Cu²⁺] = x and [OH⁻] = 2x

from equation (1)

we get,

2.2×10⁻²⁰ = x.(2x)²

⇒ 2.2×10⁻²⁰ = 2x³

⇒ x = (2.2×10⁻²⁰/4)¹/³

X = 1.8 × 10⁻⁷

∴ [Cu²⁺] =  1.8 × 10⁻⁷ (M)

and  [OH⁻] = 2×  1.8 × 10⁻⁷

                  = 3.6 × 10⁻⁷ (M)

Solubility equilibrium is a form of dynamic equilibrium that exists when a chemical compound in a strong country is in chemical equilibrium with a solution of that compound. The strong can also dissolve unchanged, with dissociation, or with a chemical reaction with another constituent of the solution, inclusive of acid or alkali.

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To find the density of the unknown piece of metal, we can use the formula:

Density = mass / volume.

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There are vacant orbitals on the phosphorus atom that allows it to expand its octet.

There is a concept that we would need to consider as we are answering the question that we here and that is the idea of the octet rule. The octet rule states that it is only about eight electrons that can be found on the outermost shell of an atom and as such all of the compounds can be formed in obedience to this rule.

Now we should know that there are no vacant d orbitals that are present on the nitrogen atom and this stems from the fact that it does not have a 3d level as such there are no orbitals that can be able to help the Nitrogen atom so as to be able to expand its octet. This is the reason why its pentafluoride can be easily formed.

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Explanation:

A buffer is a mixture of a weak acid and its conjugate base, or a weak base and its conjugate acid. In our case we are reacting a strong acid (HCl) and a weak base (sodium acetate). So we don't have a buffer. The strong acid will neutralize the weak base. We have to determine which of them is in excess and find the pH of the resulting solution.

HCl (aq) + CH₃COONa (aq) ----> NaCl (aq) + CH₃COOH (aq)

First we have to determine the number of moles of each reactant. We added 275 ml of a 0.676 M solution of HCl and 500 mL of a 0.525 M solution of CH₃COONa. We can use the definition of molarity concentration to determine the number of moles of each reagent.

Molarity = moles of solute/volume of solution in L

moles of solute = molarity * volume of solution in L

moles of HCl = 0.676 M * 0.275 L

moles of HCl = 0.186 moles

moles of CH₃COONa = 0.525 M * 0.500 L

moles of CH₃COONa = 0.262 moles

HCl (aq) + CH₃COONa (aq) ----> NaCl (aq) + CH₃COOH (aq)

In the equation of the reaction all the coefficients are 1. So 1 mol of HCl will completely neutralize 1 mol of CH₃COONa. The molar ratio between them is 1 to 1.

1 mol of HCl = 1 mol of CH₃COONa

We mixed 0.262 moles of CH₃COONa with 0.186 moles of HCl. The 0.186 moles of HCl will neutralize 0.186 moles of CH₃COONa. And CH₃COONa will be excess.

Excess of CH₃COONa = 0.262 moles - 0.186 moles

Excess of CH₃COONa = 0.076 moles

Now we have to determine the concentration of this excess. We mixed 0.275 L with 0.500 L. Then the total volume of solution is 0.775 L. And the concentration of CH₃COONa after the reaction is:

total volume = 0.500 L + 0.275 L

total volume = 0.775 L

Resulting molarity of CH₃COONa = 0.076 moles/0.775 L

Resulting molarity of CH₃COONa = 0.098 M

Finally to get our answer we have to determine the pH of this resulting solution. To determine the pH of a weak base we have to use the ICE table. In solution

Answer:

The ink dyes that travel to the top of the paper have a greater affinity for the mobile phase than the stationary phase whereas the other ink dyes that remained near the bottom of the paper have a greater affinity for the stationary phase than the mobile phase.

Chromatography is the process by which molecules of colored subtances such as dyes are separated based o their affinity for a particular solvent or solid phase as well as based on their molecular weights.

Chromatography separates substances based on differences in their physical properties.

In a chromatographic setup, there are two phases:

In the given chromatographic separation process, the dye to be separated is applied o the stationary phase and a mobile phase is allowed to move over the dye.

The particles of the dye are separated based on their affinity for either the stationary or mobile phase.

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Answer: Particles are moving from regions of high concentration to low concentration.

Explanation:

Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. The particles of smelly gas are free to move quickly in all directions. They eventually spread through the whole room from an area of high concentration to an area of low concentration. This continues until the concentration of the particles of smelly gas is the same throughout the room. Remember that the particles still move, even when the smell is evenly spread.

Answer:

Answer: Particles are moving from regions of high concentration to low concentration.

Explanation:

right on edge 2021

Answer:

This question lacks options, the options are:

A). synthesizes more sugar

B). has a higher chromosome count

C). produces fewer proteins

D). uses less carbon dioxide

The answer is A

Explanation:

The chloroplast is an organelle present in the cells of photosynthetic organisms. It is the site where photosynthesis, which is the production of food (sugars) from sunlight energy, occurs.

According to this question, a cell in the leaf of a corn plant contains more chloroplasts than a cell in the stem of the same corn plant. Based on this observation, it can be inferred that the LEAF CELLS WILL SYNTHESIZE MORE SUGARS THAN THE STEM CELL because the more the chloroplast, the higher the photosynthetic rate and subsequently the higher the amount of sugar produced.

The difference in the number of cations and anions in the given mixture is approximately 0.0005 mol.

The molar mass of Na2SO4 (sodium sulfate) can be calculated as follows:

2(Na) + 1(S) + 4(O) = 2(22.99 g/mol) + 32.07 g/mol + 4(16.00 g/mol) = 142.04 g/mol

The number of moles of Na2SO4 :

moles of Na2SO4 = mass of Na2SO4 / molar mass of Na2SO4

moles of Na2SO4 = 1.49 g / 142.04 g/mol ≈ 0.0105 mol

Similarly, the molar mass of Al2(SO4)3 (aluminum sulfate) :

2(Al) + 3(S) + 12(O) = 2(26.98 g/mol) + 3(32.07 g/mol) + 12(16.00 g/mol) = 342.15 g/mol

The number of moles of Al2(SO4)3:

moles of Al2(SO4)3 = mass of Al2(SO4)3 / molar mass of Al2(SO4)3

moles of Al2(SO4)3 = 3.42 g / 342.15 g/mol ≈ 0.0100 mol

For Na2SO4, the ratio of cations (Na+) to anions (SO42-) is 2:1. So, the number of cations in 0.0105 mol of Na2SO4 is 2 * 0.0105 mol = 0.0210 mol, and the number of anions is 0.0105 mol.

For Al2(SO4)3, the ratio of cations (Al3+) to anions (SO42-) is 2:3. So, the number of cations in 0.0100 mol of Al2(SO4)3 is 2 * 0.0100 mol = 0.0200 mol, and the number of anions is 3 * 0.0100 mol = 0.0300 mol.

Calculating the difference in the number of cations and anions:

Difference = (Number of Cations in Na2SO4 + Number of Cations in Al2(SO4)3) - (Number of Anions in Na2SO4 + Number of Anions in Al2(SO4)3)

Difference = (0.0210 mol + 0.0200 mol) - (0.0105 mol + 0.0300 mol)

Difference = 0.0410 mol - 0.0405 mol

Difference ≈ 0.0005 mol

Therefore, the difference in the number of cations and anions in the given mixture is approximately 0.0005 mol.

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The "Wakanda speech," six weeks have passed, and the world is still in shock.

Thus, Global leaders and analysts were taken aback by King T'Challa's declaration at the United Nations General Assembly that the Kingdom of Wakanda is not a developing country of textiles, farms, and shepherds with a GDP per person of roughly $760 but rather a technological superpower and Wakanda speech.

The country's widespread employment of cutting-edge magnetic levitation trains, flying machines, opaque holograms, and spinal cord-healing beads has led to the coining of the phrase "uber-developed" nation.

The most watched video ever is currently "Welcome to the Future," an introduction video created by Wakanda's recently established Ministry of Foreign Affairs.

Thus, The "Wakanda speech," six weeks have passed, and the world is still in shock.

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Answer:

6 cm Hg

Explanation:

Boyles Law: P1V1=P2V2

(100 mL)(x)=(20 mL)(30 cm Hg)

x = 6 cm Hg

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Answer:

_ NH4NO3 -> _ N2O + 2 H2O

Explanation:

By having 2 water molecules, we reach the 4 H atoms and 3 O atoms that are present on the left side. We don't add any other coefficients because we already have enough N atoms and we don't have to manipulate the left side at all.

The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

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The electrons that are gained by the \(Ni^{2+}\) ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

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The net ionic equation for the reaction between hydrofluoric acid (HF) and potassium hydroxide (KOH):

Balanced Chemical Equation:

HF + KOH → KF + H2O

Net Ionic Equation:

HF + OH- → F- + H2O

The coefficients for the net ionic equation are 1 for each reactant and product.

Hydrofluoric acid (HF) is a highly corrosive and toxic inorganic acid with a wide range of industrial and laboratory applications. It is used as a cleaning agent for removing surface deposits, stains, and other unwanted material from glass, metals, and ceramics.

When aqueous solutions of hydrofluoric acid and potassium hydroxide are mixed, they react to form a salt and water. During the reaction, the hydrofluoric acid donates a hydrogen ion (H+) to the potassium hydroxide, which accepts it to form water and the salt potassium fluoride.

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When the moving car brakes to the stop the kinetic energy of car will be converted to the heat energy.

The mechanical brake will be applies to the friction force and it convert the kinetic energy of the car into the thermal energy that which then dissipates on atmosphere. The process of the braking will follow the principle of the conservation of the energy.

The conservation of the energy is the principle, that is expressed in its the most general form, and it is the first law of the thermodynamics. The first law of thermodynamics explains that "the energy of the universe remains the same."

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This question is incomplete, the complete question is :

A car in motion has kinetic energy. A moving car is suddenly stopped. Why does the car stop? Where did the energy go?