Please help me as fast as possible! I really need help! I’ll mark as brainliest for correct answers. Please help fast please please

The Ksp of Ca(OH)₂ is approximately 1.58 × 10 ⁻⁵

The maximum pH achievable in a solution of Mn(OH)₂ (Ksp = 2.1 × 10 ⁻¹³ is approximately 7.16.

To determine the Ksp (solubility product constant) of Ca(OH)₂, we can use the pH of the saturated solution. The pH of 12.40 indicates the concentration of hydroxide ions (OH⁻) in the solution.

pOH = 14 - pH

pOH = 14 - 12.40

pOH = 1.60

Since Ca(OH)₂ dissociates into two OH⁻ ions for every formula unit, the concentration of OH⁻ ions is twice the concentration of Ca(OH)₂.

[OH⁻] = 2 * 10^(-pOH)

[OH⁻] = 2 * 10^(-1.60)

[OH⁻] = 0.0251 M

The concentration of Ca²⁺ ions is the same as the concentration of OH⁻ ions since the compound is 1:1.

[Ca²⁺] = [OH⁻] = 0.0251 M

Now we can calculate the Ksp of Ca(OH)₂ using the concentrations:

Ksp = [Ca²⁺] * [OH⁻]²

Ksp = (0.0251) * (0.0251)²

Ksp ≈ 1.58 × 10 ⁻⁵

Therefore, the Ksp of Ca(OH)₂ is approximately 1.58 × 10 ⁻⁵

Now let's calculate the maximum pH that could be achieved in a solution of Mn(OH)₂ with a Ksp of 2.1 × 10  ⁻¹³

Since Mn(OH)₂ dissociates into two OH⁻ ions for every formula unit, we need to calculate the concentration of OH⁻ ions at equilibrium using the Ksp.

Ksp = [Mn²⁺] * [OH⁻]²

2.1 × 10  ⁻¹³  = [OH⁻]²

[OH⁻] = sqrt(2.1 × 10  ⁻¹³

[OH⁻] ≈ 1.45 × 10⁻⁷M

To calculate the pH, we can use the pOH equation:

pOH = -log[OH⁻]

pOH = -log(1.45 × 10⁻⁷

pOH ≈ 6.84

since pH + pOH = 14, we can determine the maximum pH:

pH = 14 - pOH

pH = 14 - 6.84

pH ≈ 7.16

Therefore, the maximum pH that could be achieved in a solution of manganese (II) hydroxide, Mn(OH)₂, with a Ksp of 2.1 × 10  ⁻¹³ ), is approximately 7.16.

Learn more about: Ksp (solubility product constant)

brainly.com/question/17101393

#SPJ11

Answer:

year 1 is 5.5%

year 2 is 7.5%

year 3 is 10.2%

Explanation:

since,

length of the transect covered in seaweed / total lenth of transect x 100

then,

0.55 / 10.0 x 100 = 5.5

and

0.75 / 10.0 x 100 = 7.5

and

1.02 / 10.0 x 100 = 10.2

you could also just move the decimal to the right once

:)

Answer:

secondary

primary

primary

secondary

secondary

Explanation:

The heat and lava at Yellowstone National Park are primarily attributed to a tectonic setting known as a hotspot.

A hotspot is a region in the Earth's mantle where a column of hot and upwelling magma rises from deep within the mantle to the surface. This magma plume generates intense heat and volcanic activity when it reaches the Earth's crust.

Yellowstone sits atop one of the most well-known hotspots on Earth, known as the Yellowstone hotspot. The hotspot is associated with a deep mantle plume that has been stationary for millions of years while the North American tectonic plate has moved over it. As the plate moves, it creates a trail of volcanic activity, forming a chain of extinct and active volcanic centers, with Yellowstone being the most prominent.

The heat generated by the Yellowstone hotspot fuels the geothermal features in the park, such as hot springs, geysers, and fumaroles. The eruption of lava at Yellowstone is infrequent but has occurred in the past and can be attributed to the movement of magma from the hotspot reaching the surface.

It's important to note that the tectonic setting responsible for the heat and lava at Yellowstone is unique to that specific region and differs from other volcanic areas, such as those associated with subduction zones or mid-ocean ridges.

To know more about the hotspot refer here :

https://brainly.com/question/30902587#

#SPJ11

The mass of sodium chloride that would be produced from 12 moles of magnesium chloride in the provided reaction would be 1404 g.

The AMU stands for "atomic mass unit," which is a unit of mass used in chemistry and physics to express the mass of atoms, molecules, and other particles on a very small scale. One atomic mass unit is defined as one-twelfth of the mass of a carbon-12 atom, which is approximately 1.66054 x 10^-27 kilograms. The AMU is a convenient unit to use when working with very small masses because it allows scientists to express them in more manageable numbers.

The balanced chemical equation is:

2 Na + MgCl2 → 2 NaCl + Mg

The molar mass of MgCl2 is:

MgCl2 = 24 g/mol (Mg) + 2 × 35.5 g/mol (Cl) = 95 g/mol

The stoichiometry of the reaction indicates that 1 mole of MgCl2 produces 2 moles of NaCl.

So, 12 moles of MgCl2 will produce:

2 moles NaCl/mol MgCl2 × 12 mol MgCl2 = 24 moles NaCl

The molar mass of NaCl is:

NaCl = 23 g/mol (Na) + 35.5 g/mol (Cl) = 58.5 g/mol

Therefore, the mass of NaCl produced from 12 moles of MgCl2 is:

24 moles NaCl × 58.5 g/mol NaCl = 1,404 g (or 1.404 kg).

To know more about AMU, visit:

https://brainly.com/question/11043552

#SPJ1

Answer:

2.60 M

Explanation:

M1V1=M2V2

Where

M1 = ?

V1 = 20.9 mL

M2 = 2.548 M

V2 = 21.39 mL

(?)(20.9 mL) = (2.548 M)(21.39 mL)

------------------   -----------------------------    

(20.9 mL)                 (20.9 mL)

? = (54.50)/(20.9) = 2.60 M

(Side Note: the mL cancel each other out to leave M units only)

Answer:

the answer would be B :)

The correct answer is; Bonds create new elements

Chemical bonds are formed when two or more atoms are joined together to form a compound.

Chemical compounds are more stable than the respective elements from which they are formed.

Chemical bonds do not create new elements.

Learn more; https://brainly.com/question/6071754

Answer:

20.796 liters

Explanation:

PV = n RT     R = .082057  L-atm / (K-mol)      

      25 C = 298.15 K

(1) * V = .85 * .082057 * 298.15  

   V = 20.796 liters

The correct choice is A) −5Δ[Br−]/Δt. The rate expressed as Δ[Br2]/Δt is proportional to -5 times the rate of change of Br−.

In the given reaction 5Br−(aq) + BrO3−(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(aq), the stoichiometric coefficients provide information about the relationship between the reactants and products. To determine the rate expressed as Δ[Br2]/Δt, we need to compare it with the rate of change of the other species.

Based on the balanced equation, for every 5 moles of Br− consumed, 3 moles of Br2 are produced. Therefore, the rate of change of Br−, Δ[Br−]/Δt, is related to the rate of change of Br2, Δ[Br2]/Δt, by a factor of -5/3.

The other choices, B) −0.6Δ[Br−]/Δt, C) 3Δ[BrO3−]/Δt, and D) −Δ[H2O]/Δt, do not correspond to the correct relationship based on the stoichiometric coefficients of the reaction. Therefore, the correct answer is A) −5Δ[Br−]/Δt.

for such more questions on reaction

https://brainly.com/question/24795637

#SPJ8

Answer:

D. by repeating trials during an experiment

Explanation:

chile its actually d

Explanation:

Answer: what materials transmits the most light waves?

Explanation:

Answer:

brittle

Explanation:

Answer:

brittle

Explanation:

To shift the potential of the lead-zinc cell upward, toward 0.70 V, the following actions would give the desired result:

Add some concentrated Pb(C2H3O2)2 solution to the Pb2+/Pb couple

Adding some concentrated Zn(C2H3O2)2 solution to the Zn2+/Zn couple

Any action that makes [Zn2+] larger than [Pb2+]

A lead-zinc cell is a galvanic cell consisting of lead and zinc electrodes immersed in a suitable electrolyte. The potential of the lead-zinc cell is the difference in electrode potential between the lead and zinc electrodes, as determined by their concentration gradient.

Therefore, to shift the potential of the lead-zinc cell upward, toward 0.70 V, one should add some concentrated Pb(C2H3O2)2 solution to the Pb2+/Pb couple, add some concentrated Zn(C2H3O2)2 solution to the Zn2+/Zn couple, and any action that makes [Zn2+] larger than [Pb2+].

To learn more about "lead-zinc cell", visit: https://brainly.com/question/31316460

#SPJ11

1) To react with 0.460 mole of SO₂, 1.15 moles of C are needed.

2) When 2.0 moles of C reacts, 1.6 moles of CO are produced.

3) To produce 0.35 mole of CS₂, 0.70 moles of SO₂ are required.

4) When 2.4 moles of C reacts, 0.48 moles of CS₂ are produced.

1.

From the balanced equation, the stoichiometric ratio between C and SO₂ is 5:2. Therefore, to calculate the moles of C required, we can set up a proportion:

(5 moles C / 2 moles SO₂) = (x moles C / 0.460 moles SO₂)

Solving for x, we find:

x = (5/2) × 0.460 = 1.15 moles C

2.

From the balanced equation, the stoichiometric ratio between C and CO is 5:4. Therefore, to calculate the moles of CO produced, we can set up a proportion:

(5 moles C / 4 moles CO) = (2.0 moles C / x moles CO)

Solving for x, we find:

x = (4/5) × 2.0 = 1.6 moles CO

3.

From the balanced equation, the stoichiometric ratio between SO₂ and CS₂ is 2:1. Therefore, to calculate the moles of SO₂ required, we can set up a proportion:

(2 moles SO₂ / 1 mole CS₂) = (x moles SO₂ / 0.35 moles CS₂)

Solving for x, we find:

x = (2/1) × 0.35 = 0.70 moles SO₂

4.

From the balanced equation, the stoichiometric ratio between C and CS₂ is 5:1. Therefore, to calculate the moles of CS₂ produced, we can set up a proportion:

(5 moles C / 1 mole CS₂) = (2.4 moles C / x moles CS₂)

Solving for x, we find:

x = (1/5) × 2.4 = 0.48 moles CS₂

Learn more about number of moles from the link given below.

https://brainly.com/question/20370047

#SPJ4

a) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s), The coefficient of iodine will be 1 and its symbol will be I2 .

A displacement reaction is a reaction in which one atom or group of atoms is replaced by another atom or group of atoms. In other words, a less reactive element takes the place of a more reactive one.A displacement reaction has the following generic equation: When A is substituted for B in the BC compound, the result is A + BC AC + B.Example: Copper and iron are the results of the reaction between iron and copper sulphate.

The word equation displayed is

potassium bromide + iodine bromine + potassium iodide

transforming the provided word equation into a chemical equation.

→Br2+2KI→KBr+I2

By balancing the chemical equation above, we obtain

→Br2+2KI→2KBr+I2

Due to the fact that iodine is a diatomic molecule, its coefficient on the product side is 1 and it has the symbol.

Learn more about iodine here:

https://brainly.com/question/16867213

#SPJ4

Answer:

It is a Binary Compound

Explanation:

Answer:

[binary compound]

Explanation:

A(n) A binary compound is one that contains two, and only two, elements.

The calculate the total mass of Libra(s) required to make 500.0g of an aqueous solution with a concentration of 388 parts per million, follow these steps Convert the concentration from parts per million (ppm) to a mass ratio: 388 ppm means there are 388 grams of Libra in 1,000,000 grams of the solution.

The Calculate the mass ratio Divide the mass of Libra by the total mass of the solution to obtain the mass ratio.   Mass ratio = Mass of Libra / Total mass of solution Rearrange the formula to find the mass of Libra   Mass of Libra = Mass ratio × Total mass of solution Substitute the given values into the formula Total mass of solution is 500.0g, and the concentration of Libra is 388ppm which is equivalent to 388g of Libra in 1,000,000g of solution. Therefore, the mass ratio is 388g/1,000,000 Calculate the mass of Libra   Mass of Libra = (388g / 1,000,000g) × 500.0g Solve for the mass of Libra Mass of Libra ≈ 0.194g So, approximately 0.194g of Libra(s) is required to make 500.0g of an aqueous solution of Libra with a concentration of 388 parts per million.

learn more about mass here.

https://brainly.com/question/15959704

#SPJ11

Answer:

9.90

Explanation:

Given [H+] = 1.25 x 10^-10 M, we can calculate the pH using the formula:

pH = -log10([H+])

pH = -log10(1.25 x 10^-10)

Using logarithmic properties:

pH = -log10(1.25) - log10(10^-10)

Since log10(10^-10) is equal to -10:

pH = -log10(1.25) - (-10)

pH = -log10(1.25) + 10

Now, evaluating the logarithm using a calculator:

pH = -0.0969 + 10

pH = 9.9031

Therefore, the pH of the solution with [H+] = 1.25 x 10^-10 M is approximately 9.9031. Rounding it to two decimal places, the pH is approximately 9.90.

Answer:

Zinc oxide is  used in the manufacture of  many products such as paints, rubber, cosmetics, pharmaceuticals, plastics, inks, soaps, batteries, textiles and electrical equipment.

Explanation:

Answer:

is called sheesh

Explanation:

cause

A buffer is made from an acid - base conjugate pair as shown by option A

Buffers are often composed of weak acids and their conjugate bases (or weak bases and their conjugate acids). The weak acid can contribute a proton to balance any new base, whereas the conjugate base can absorb a proton to do so.

This balance between the acid and its conjugate base allows the buffer to survive pH changes. Buffers are essential in biological systems because many biochemical processes are particularly sensitive to pH changes.

Learn more about buffer:https://brainly.com/question/31847096

#SPJ1

ANSWER;

2.914 L

Explanation:

A balloon is filled to a volume of 2.00 L with 3.50 moles of gas at 25

°C. With pressure and temperature held constant, what will be the

volume of the balloon if 1.60 moles of gas are added?

WE HAVE INCREASED THE NUMBER OF PARTICLES THE BALLOON BY

45.7%

ALL OTHER THINGS EQUAL, WE HAVE INCREASED THE VOLUME BY

45.7%

THE NEW VOLUME SHOULD BE 2.00 X 1.457= 2.914 L

Note that from the "The Great Debaters" in the scene involving a debate between Wiley College vs. Harvard University, when planning their debate against Harvard the point that Samantha suggested should go last is: the team's point against the death penalty.

Note that The Great Debaters is a 2007 drama film directed by and starring Denzel Washington. The film is based on the true story of the Wiley College debate team, a group of African American students who, in 1935, became the first team from a black college to compete in the national intercollegiate debate championship.

The team was led by Professor Melvin B. Tolson, who was played by Washington in the film. Samantha advises them to leave their argument against the death sentence for last since it is the most emotionally charged and impactful point in their case.

Note that the theme of the story "The Great Debaters" is about the importance of education and being bold to stand for the truth and one's beliefs.

Learn more about "The Great Debaters":
https://brainly.com/question/16001438
#SPJ1

Explanation:

Chemistry, however, plays the primary role in materials science because it provides information about the structure and composition of materials. Materials scientists study the structures and chemical properties of various materials to develop new products or enhance existing ones.

Answer:

the other person is right.

Explanation:

The orbital period of the asteroid, carried out to 4 significant digits, is approximately 1652.0 years.

To find the orbital period (P) of an asteroid with a given semi-major axis (a), we can use Kepler's third law:

a³ = P²

Given that the semi-major axis (a) is 73.4 AU, we can substitute this value into the equation and solve for the orbital period (P):

(73.4 AU)³ = P²

(73.4)³ AU³ = P²

P² = (73.4)³ AU³

Taking the square root of both sides:

P = sqrt((73.4)³) AU

Using a calculator to evaluate the expression, we find:

P ≈ 1652.0 AU

Therefore, the orbital period of the asteroid, carried out to 4 significant digits, is approximately 1652.0 years.

Learn more about orbital period from the link given below.

https://brainly.com/question/31543880

#SPJ4

Answer:

0.24%

Explanation:

The following data were obtained from the question:

Measured value = 42.1 g

Actual value = 42 g

Percentage error =?

Percentage error can be obtained by using the following formula:

Percentage error = |Measured value – Actual value | / Actual value × 100

With the above formula, we can obtain the percentage error as follow:

Measured value = 42.1 g

Actual value = 42 g

Percentage error =?

Percentage error = |42.1 – 42| / 42 × 100

Percentage error = 0.1/42 × 100

Percentage error = 10/42

Percentage error = 0.24%

Therefore, the percentage error is 0.24%

Answer:

An object that is at rest will stay at rest unless a force acts upon it. An object that is in motion will not change its velocity unless a force acts upon it. This is known as uniform motion. An object continues to do whatever it happens to be doing unless a force is exerted upon it.

Explanation: NEWTONS laws of motion