If the Hydrogen ion concentration [H+] of certain slurry sample of soil with water is 3.5 x 10-6 M, what is the pH of the soil sample? Is the soil acidic, neutral or alkaline. Write your computation in the reply section. Highlight your final answer.

For an adjustment of the alkalinity from 70 ppm to 100 ppm in a 250,000 gallon pool using sodium bicarbonate, the amount of added chemical  is mathematically given as

X=105lbs

Generally, the equation for the Chemical added  is mathematically given as

X=requred usage*desired change/10ppm*pool of gallon/10000

Therefore

X=1.4*(100-70/10)*(250000/10000

X=105lbs

In conclusion, the added chemical

X=105lbs

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Option A, The initial volume of 180 mL of the weak acid should be diluted to 720 mL to double the percentage ionization, assuming Ka <<< 0.2 M.

The concentration of the undissociated acid (HA) in the solution should roughly remain constant after dilution if the acid dissociation constant (Ka) is assumed to be significantly less than the starting acid concentration of 0.2 M, or Ka <<< 0.2 M. This is because dilution has minimal impact on the concentration of undissociated acid since the dissociation of the acid is a very tiny portion of the overall acid concentration.

Under this assumption, the concentration of the undissociated acid before and after dilution is:

[HA] = 0.2 M

After dilution, the total volume of the solution becomes V + 180 mL. The concentration of the dissociated acid (H+) in the diluted solution is: since the concentration of the undissociated acid is constant.

[H+] = [A-] = Ka[HA]/[H+] = Ka[HA]/(0.2 - [H+])

To double the percentage ionization, we need to double the ratio [H+]/[HA]. Using the expression for [H+], we can write:

2 = 2 x [H+]/[HA] = 2 x [H+]/0.2 = [H+]/0.1

Solving for [H+], we get:

[H+] = 0.2 M

Substituting this value in the expression for [A-], we get:

[A-] = Ka[HA]/(0.2 - 0.2) = Ka/[H+]

Since Ka <<< 0.2 M, we can make the approximation that [H+] ≈ Ka. Substituting this value in the expression for [A-], we get:

[A-] ≈ Ka/Ka = 1

As a result, the diluted solution's ultimate concentrations of the dissociated acid (H+) and conjugate base (A-) are around 0.2 M and 1 M, respectively. The final volume of the solution after dilution is:

V + 180 mL = (0.2 M + 1 M)V

V = 720 mL

Therefore, the initial volume of 180 mL of the weak acid should be diluted to 720 mL to double the percentage ionization, assuming Ka <<< 0.2 M.

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The question is -

To what volume should 180 mL of any weak acid, HA, with a concentration of 0.10 M be diluted to double the percentage ionization?

Assume Ka<<<0.2M.

a) 720 mL

b) 540 mL

c) 360 mL

d) 900 mL

14.1 mL H₂SO₄ is needed to neutralize solution of NaOH.

Balanced chemical equation for neutralization reaction of sulfuric acid and sodium hydroxide:

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

c(H₂SO₄) = 0.3 M = 0.3 mol/L; concentration of sulfuric acid

V(NaOH) = 34.0 mL = 0.034 L; volume of sodium hydroxide

c(NaOH) = 0.25 M = 0.25 mol/L; concentration of sodium hydroxide

n(NaOH) = c(NaOH) × V(NaOH)

n(NaOH) = 0.25 mol/L × 0.034 L.

n(NaOH) = 0.0085 mol; amount of sodium hydroxide

From chemical reaction: n(H₂SO₄) : n(NaOH) = 1 : 2.

n(H₂SO₄) = 0.0085 mol ÷ 2

n(H₂SO₄) = 0.00425 mol; amount of sulfuric acid

V(H₂SO₄) = n(H₂SO₄) ÷ c(H₂SO₄).

V(H₂SO₄) = 0.00425 mol ÷ 0.3 mol/L.

V(H₂SO₄) = 0.0141 L = 14.1 mL; volume of sulfuric acid

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The alpha of the investment is - 0.8%.

The alpha of an investment is a measure of its risk-adjusted performance. It indicates the excess return earned by the investment compared to the return predicted by the market based on its beta.

The formula to calculate alpha is:

alpha = actual return - expected return

where the expected return is the risk-free rate plus the product of the market return and the investment's beta.

Here, we are given:

actual return = 10%

market return = 10%

risk-free rate = 2%

beta = 1.1

Expected return = risk-free rate + beta * (market return - risk-free rate)

Expected return = 2% + 1.1 * (10% - 2%)

Expected return = 10.8%

Therefore, the alpha of the investment is:

alpha = actual return - expected return

alpha = 10% - 10.8%

alpha = -0.8%

The negative value of alpha indicates that the investment underperformed compared to what was expected based on its beta and the market return.

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Complete Question

Answer:

don't worry I'm here

Here is a ranking of the following oil spills from highest to lowest in terms of oil tonnage spilled:

Deep water Horizon oil spill (2010): The Deep water Horizon oil spill in the Gulf of Mexico is considered one of the largest and most devastating oil spills in history. It resulted in an estimated 4.9 million barrels (approximately 210 million gallons or 780,000 metric tons) of oil being released into the ocean.

Ixtoc I oil spill (1979): The Ixtoc I oil spill occurred in the Bay of Campeche in the Gulf of Mexico. It released an estimated 3.3 million barrels (approximately 140 million gallons or 525,000 metric tons) of oil into the marine environment.

Atlantic Empress oil spill (1979): The Atlantic Empress, an oil tanker, collided with another tanker, Aegean Captain, off the coast of Trinidad and Tobago. This accident resulted in the release of an estimated 2.1 million barrels (approximately 90 million gallons or 337,000 metric tons) of oil into the Caribbean Sea.

ABT Summer oil spill (1991): The ABT Summer, an oil tanker, experienced an explosion and sank off the coast of Angola. It spilled an estimated 1.8 million barrels (approximately 75 million gallons or 280,000 metric tons) of oil into the Atlantic Ocean.

Nowruz oil field spill (1983): The Nowruz oil field spill occurred during the Iran-Iraq War. It resulted in the deliberate release of an estimated 1.5 million barrels (approximately 63 million gallons or 236,000 metric tons) of oil into the Persian Gulf.

Please note that the figures provided are approximate estimates, and the actual quantities spilled may vary depending on different sources and ongoing assessment

Answer:

Down syndrome can occur when a portion of chromosome 21 becomes attached (translocated) onto another chromosome, before or at conception. These children have the usual two copies of chromosome 21, but they also have additional genetic material from chromosome 21 attached to another chromosome.

Answer:

usually caused by an error in cell division called nondisjunction.  babies are normally born with 46 chromosomes, but when they have down syndrome they have an extra copy of one of the chromosomes

Explanation:

Answer:

I'm not a genius but it's an invisible force that pulld object towards eachother, Earth's gravity is what keeps you on the ground and what makes things fall, Anything with mass also has gravity, objects with more mass means they have more gravity

Answer:

See explanation

Explanation:

The bonding in certain compounds or ions can not be thoroughly explained in terms of a single Lewis structure.

The observed properties of the compound or ion indicate that it can not be entirely represented by a single Lewis structure. For example, all C-C bond  in benzene are equal.

When this is the case, a number of structures called resonance structures are invoked in order to satisfactorily explain the properties of the particular chemical specie under study.

Answer:

v = 78.5 km/h

Explanation:

It is given that, the distance between one city to another is 314 km. The overall trip takes 4 hours. We need ton find average velocity. It is equal to the total displacement divided by total time taken. So,

\(v=\dfrac{d}{t}\\\\v=\dfrac{314\ km}{4\ h}\\\\v=78.5\ km/h\)

So, average velocity is 78.5 km/h.

The described process is the six-electron reduction of Cr3+ ions to solid chromium (Cr) and solid selenium (Se). We can determine the accuracy of the following claims using the information provided:

G > 0: Under normal circumstances, the reaction is not spontaneous because it entails reducing Cr3+ ions to Cr, which requires energy input. G is hence positive.

S > 0: Without extra system knowledge, it is challenging to discern the sign of S. The total change in entropy (S) may, however, be little or even negative because the reaction results in the production of two solid products from two watery reactants.

Since G is positive, the reaction is reactant-favored and not product-favored. The claim that "The reaction is reactant-favored" is thus true.

Since the reaction involves the transfer of six electrons from Cr3+ to Se, the statement "n = 6 mol electrons" is accurate.

G > 0: Since the reaction is not spontaneous under normal circumstances, G is higher than zero.

The appropriate answers are thus:

The reaction is reactant-favored.

n = 6 mol electrons.

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The Lewis structure for the sulfate polyatomic ion (SO4)2- is:

      O
      ||
-O - S - O-
      ||
      O

     O    
      ||    
O = S - O-
      ||      
    -O  

There are a total of 6 equivalent resonance structures that can be drawn for the sulfate ion. These structures differ only in the placement of the double bonds between sulfur and oxygen atoms. One structure has two double bonds between sulfur and oxygen atoms, while the other has one double bond and one single bond between sulfur and oxygen atoms.

The Lewis structure for the sulfate polyatomic ion (SO₄²⁻) consists of a central sulfur atom surrounded by four oxygen atoms, with each oxygen atom forming a double bond with the sulfur atom.

There are a total of 32 valence electrons in this structure. Due to the nature of the double bonds and the overall charge, there are 6 equivalent resonance structures that can be drawn for the sulfate ion. This resonance stabilization contributes to the stability of the ion.

Sulfur has 6 valence electrons, and each oxygen has 6 valence electrons, giving a total of 32 valence electrons for the sulfate ion (6 from sulfur + 4 x 6 from oxygen). To complete the Lewis structure, we add formal charges to each atom to make sure the overall charge of the ion is -2. The sulfur atom has a formal charge of 0, while each oxygen atom has a formal charge of -1.

These structures have the same overall charge and the same number of valence electrons, but the distribution of electrons is different.

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The Lewis structure for the sulfate polyatomic ion can be drawn by following a few steps. There are equivalent resonance structures that can be drawn for the ion.

The Lewis structure for the sulfate polyatomic ion (SO42-) can be drawn by following these steps:

There are equivalent resonance structures that can be drawn for the sulfate polyatomic ion because the double bond can be moved around among the oxygen atoms while maintaining the same overall structure.

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Hi there!

To find the mole fraction for the remaining compound (Carbon monoxide), we must remember that mole fractions add up to ONE.

We can subtract the mole fractions of all of the other gases from one to solve for the mole fraction of carbon monoxide.

1 - 0.164 - 0.278 - 0.455 - 0.101 = 0.002

The volume, in milliliters, of the krypton gas is 523ml.

The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as

                                    PV = nRT

where,

P = Pressure

V = Volume

T = Temperature

n = number of moles

Given,

Mass = 10g

Pressure = 563 mm Hg

Temperature = 298 K

moles of Kr =mass / atomic mass

= 10 / 84

= 0.119 moles

PV = nRT

563 × V = 0.119 × 8.314 × 298

V = 0.523L = 523ml

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Answer:

for more details are in the pic

The balanced chemical equation for the reaction FeCl2 + Na3PO4 -----> Fe3(PO4)2 + NaCl is 3FeCl2 + 2Na3PO4 ------> 6NaCl + Fe3(PO4)2.

What is a balanced chemical equation?

Balanced chemical equation is the equation of a reaction in which both reactant and product sides are equal in the number of atoms or molecules. The total charges on both the sides should be equal.

The given reaction can be made into balanced chemical equation by counting the number of atoms on both the sides. If the atoms of a particular element is less on either sides then multiply the whole molecule by a number which balances the number of atoms on the either sides of the reaction.

Therefore, the balanced chemical equation of FeCl2 + Na3PO4 -----> Fe3(PO4)2 + NaCl can be written as 3FeCl2 + 2Na3PO4 ------> 6NaCl + Fe3(PO4)2.

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Answer:

750 g of phosphorus is 750 g of phosphorus

Pictograms are illustrative symbols that make it clear to the user of a potentially dangerous product what kind of hazard was present. You can quickly determine whether a product is combustible or health risk.

To make it simple for the user of the a hazardous product to understand what kind of danger is present, WHMIS uses a set of standardised pictograms for product labels or data sheets. For workers, these hazard graphics provide clear and concise meaning.

The national ’s hazard standard for Canada is the Occupational Hazardous Materials Information Systems (WHMIS). Hazard classification, cautionary container labelling, the distribution of safety data sheets (SDSs), plus worker training programmes are the system's main components.

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Answer:

The atomic mass of Helium is 4.002602 u, I hope this helps you! :)

Answer:

what is this?

Explanation:

Answer:

A-Pacific Ocean

B-Arctic Ocean

C-Atlantic Ocean

D-Indian Ocean

E-Southern Ocean

Explanation:

got it right on edge 2020!!

Answer:

other guy is 100% correct

Explanation:

6.616% of sodium chloride is present in solution as a mass percent.

An example of an electrolyte is chloride. It functions with additional electrolytes like sodium, potassium, & carbon dioxide (CO2). These compounds support the maintenance of the body's hydrochloric balance and correct fluid balance.

One of the elements in your blood is chloride. Chloride blood tests determine whether you have healthy amounts of chlorine in your blood. Dehydration, vomiting, and other medical disorders are just a few of the many things that can lead to an abnormally high quantity of sodium in your blood.

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To rank the transition metal ions in order of decreasing number of unpaired electrons, we need to consider their electron configurations.

1. Fe³⁺ (Iron): [Ar]3d⁵ - Losing 3 electrons from 4s²3d⁶ gives 3d⁵, which has 5 unpaired electrons.
2. Mn⁴⁺ (Manganese): [Ar]3d³ - Losing 4 electrons from 4s²3d⁵ gives 3d³ which has 3 unpaired electrons.
3. V³⁺ (Vanadium): [Ar]3d² - Losing 3 electrons from 4s²3d³ gives 3d², which has 2 unpaired electrons.
4. Ni²⁺ (Nickel): [Ar]3d⁸ - Losing 2 electrons from 4s²3d⁸ gives 3d⁸, which has 2 unpaired electrons.
5. Cu⁺ (Copper): [Ar]3d¹⁰ - Losing 1 electron from 4s²3d⁹ gives 3d¹⁰, which has no unpaired electrons.

So, the ranking in order of decreasing number of unpaired electrons is:

Fe³⁺ > Mn⁴⁺ > V³⁺ = Ni²⁺ > Cu⁺

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Answer:

i think itd be an  exothermic reaction

Explanation:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise.

Student B and C are right when she says that there is no change in the size of the helium molecules. Instead, the wider space between the molecules is what has caused the volume to expand.

The helium molecules' kinetic energy grows with temperature, making them travel faster and clash with the balloon's walls more frequently. The balloon expands as a result of the higher pressure caused by the increased contact frequency.

The increase in molecular mobility and collisions, which is highlighted by Student C, also offers a convincing explanation. The helium molecules travel more quickly and energetically as the temperature rises.

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Answer:

C

Explanation:

The substance would be classified as neutral, so C.

Explanation:

A substance with a pH of 7.0 is NEUTRAL (option c).

Pure water has a pH of 7.0.

The relation between amino acids and polypeptide is that amino acid is monomer and polypeptide is polymer.

A member of the class of organic molecules known as amino acids, each of which is made up of a special organic R group, an acidic carboxyl group (COOH), a basic amino group (NH2), and an amino group (NH2) (or side chain). Alpha-amino [alpha-amino] carboxylic acid is the colloquial term for an amino acid. Every molecule has a central carbon (C), also known as the -carbon, that is attached to an amino group and a carboxyl group. Typically, a hydrogen (H) atom and a R group are used to fill the final two bonds of the -carbon atom. Standard (or common) amino acids can be divided into groups according to the polarity (i.e., the distribution of electric charge) of the R group (e.g., side chain).

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True - Atoms and molecules are typically electrically neutral because they have an equal number of positively charged protons and negatively charged electrons.

However, under specific conditions, such as during chemical reactions or in the presence of external forces, atoms or molecules can gain or lose electrons.

When an atom gains or loses electrons, it becomes an ion and carries a net positive or negative charge.

Positively charged ions are called cations, and negatively charged ions are called anions.

Similarly, when a molecule gains or loses electrons, it becomes a charged molecule or molecular ion. These charged species play important roles in various chemical and biological processes.

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The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

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Answer:

The answer is A  S8 + O16 → 8SO2

Explanation:

The balanced chemical equation is -:

S₈ + O₂-----> 8SO₂  therefore (d) is correct .

A balanced chemical equation is an equation that has equal numbers of atoms for each element both on the reactant and product sides.

Methods to balance the chemical equation -:

The number of atoms for a given element is calculated by multiplying its coefficient with the element’s subscript in its chemical formula.

The coefficients in front of the formulas to show how many molecules of that material are used or produced.

Hence , the balanced chemical equation is -:

S₈ + O₂-----> 8SO₂ ,hence option (d) is correct .

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Answer:

the cation comes first I believe

Explanation:Let me know if I'm wrong pls

Answer:

When you are in the laboratory and take a direct sniff the chemicals you are using, you run the risk of damaging your mucous membranes or your lungs. When its necessary to smell chemicals in the lab, the proper technique is to cup your hand above the container and waft the air towards your face.

Gas is a naturally odourless substance, but the completely harmless artificial smell is added to make it more detectable. The substance is called mercaptan and gives off a strong sulphur like smell.