1) If the [H+] is 3.6 x 10-3 mol/L, what is the pH?
2)If the [OH-] is 4.4 x 10-4 mol/L, what is the pOH?
3)If the [H+] is 5.7 x 10-14 mol/L, what is the pH?
4)If the [OH-] is 2.3 x 10-12 mol/L, what is the pOH?
5)If the [OH-] is 9.7 x 10-3 mol/L, what is the pH?
URGENT!! Any/All help is appreciated!

The expression for Kf for Fe(CN)6^3- is option D: [Fe(CN)6^3-] [Fe^3+] [6CN^-]^6. This is the correct expression for the formation constant of the complex ion Fe(CN)6^3-, which is the equilibrium constant for the formation of the complex from Fe^3+ and CN^- ions.

The expression includes the concentrations of all the species involved in the reaction, raised to the appropriate stoichiometric coefficients, and multiplied together. This expression can be derived from the balanced chemical equation for the formation of the complex ion and the definition of the equilibrium constant.
The expression for the formation constant Kf for Fe(CN)₆³⁻ can be given by the following equation:
Kf = [Fe(CN)₆³⁻] / ([Fe³⁺] [CN⁻]⁶)
The correct option is:
A) [Fe(CN)₆³⁻] / ([Fe³⁺] [CN⁻]⁶)
This expression represents the equilibrium constant for the formation of Fe(CN)₆³⁻ from its constituent ions, Fe³⁺ and CN⁻.

To know more about complex ion visit:

https://brainly.com/question/31310283

#SPJ11

Answer:

CuSO4

because copper formula is Cu

formula of sulfur is S and Oxygen O

The half-life of the radioisotope is  1.2 days.

Sample remained / original sample

6.25/50 = 0.125

n log 0.5 = 0.125

n = log 0.5 / 0.125 = 2.408

calculation of half life is 3 days divided by 2.408 half lives is equal to 1.2 days.

A quantity (of substance)'s half-life (symbol t12) is the amount of time needed for it to decrease to half of its original value. The phrase is frequently used in nuclear physics to refer to how long stable atoms last or how quickly unstable atoms decay radioactive. In a broader sense, the phrase is used to describe any exponential decay (or, very rarely, a non-exponential decay). For instance, the biological half-life of medications and other chemicals in the human body is discussed in the medical sciences. In exponential growth, doubling time is the opposite of half-life.

In the early 1950s, the original term, half-life period, which dates back to Ernest Rutherford's discovery of the principle in 1907, was condensed to half-life.

In his age-related research, Rutherford used the concept of a radioactive element's half-life.

Learn more about half-life here:

https://brainly.com/question/24710827

#SPJ4

the final volume of air in the balloon  when the balloon is taken to a depth of 10ft in a swimming pool, where the pressure is 981 torr is 10.8 L. Answer: d) 10.8 L.

We are given the initial volume of air in the balloon, Vi = 14.0 L. The initial pressure, Pi = 760 torr. The final pressure, Pf = 981 torr. The depth of the swimming pool, h = 10 ft. The temperature of the air, T is constant, which means that the gas in the balloon is an ideal gas.

We can use Boyle's law and the pressure difference to find the final volume of air.Boyle's law states that at a constant temperature, the volume of a gas is inversely proportional to its pressure. That is,V_1/P_1 = V_2/P_2where V1 and P1 are the initial volume and pressure, and V2 and P2 are the final volume and pressure.

Rearranging this equation, we getV_2 = V_1 × P_1/P_2= 14.0 L × (760 torr)/(981 torr)= 10.8 L

Therefore, the final volume of air in the balloon is 10.8 L. Answer: d) 10.8 L.

To learn more about volume visit;

https://brainly.com/question/28058531

#SPJ11

Answer:

a

Explanation:

The empirical formula of the unknown compound is CH₂O.

To determine the empirical formula of the unknown compound, we need to find the mole ratios of carbon and hydrogen in the compound based on the given masses of carbon dioxide (CO₂) and water (H₂O) produced during combustion analysis.

First, we calculate the moles of CO₂ and H₂O produced:

Moles of CO₂ = mass of CO₂ / molar mass of CO₂

= 2.845 g / 44.01 g/mol

= 0.0647 mol

Moles of H₂O = mass of H₂O / molar mass of H₂O

= 1.744 g / 18.015 g/mol

= 0.0968 mol

Next, we determine the mole ratio of carbon to hydrogen by dividing the moles of each element by their respective smallest values:

Carbon: 0.0647 mol / 0.0647 mol = 1

Hydrogen: 0.0968 mol / 0.0647 mol = 1.5

We need to simplify the ratio, so we multiply both values by 2 to obtain whole numbers:

Carbon: 1 × 2 = 2

Hydrogen: 1.5 × 2 = 3

The empirical formula of the unknown compound is CH₂O, indicating that it contains 2 carbon atoms, 3 hydrogen atoms, and 1 oxygen atom.

In summary, the empirical formula of the unknown compound is CH₂O.

For more such questions on empirical formula

https://brainly.com/question/1603500

#SPJ4

Explanation:

Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.

Answer: Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.

Explanation: Can i have BrainLiest

Answer:

C. Remains constant

Explanation:

Hope this helps (:

The molecule H₁₂O₆ does not exist in nature. The formula H₁₂O₆ suggests the presence of 12 hydrogen atoms and 6 oxygen atoms.

However, such a configuration is highly unstable and does not conform to the principles of chemical bonding and stability. In a typical molecule of water (H₂O), two hydrogen atoms are bonded to one oxygen atom. The Lewis structure for water would represent this bonding arrangement. Each hydrogen atom contributes one valence electron, and oxygen contributes six valence electrons.

The Lewis structure for water would show two lines (representing covalent bonds) connecting the oxygen atom to each hydrogen atom. Additionally, the oxygen atom would have two lone pairs of electrons (represented by dots) surrounding it. It is important to note that the Lewis structure represents the valence electron arrangement in a molecule and provides insight into its bonding and geometry.

However, the Lewis structure alone may not capture the full 3D shape and molecular properties. In the case of H₁₂O₆, the presence of 12 hydrogen atoms and 6 oxygen atoms is highly unlikely due to the unfavorable electron configuration and excessive charge repulsion.

know more about hydrogen atoms here:

https://brainly.com/question/28499820

#SPJ8

I wrote, The platinum electrode is the cathode in this reaction. The tin electrode is the anode in this reaction. In the half reactions that occur the nitrate is reduced to nitric oxide(NO) while the tin electrode is oxidized to Sn2+.

Oxidation occurs at the tin half cell(anode) while reduction occurs at the nitrate half cell(cathode).

A galvanic cell refers to a cell that produces electrical energy spontaneously by redox reaction. Oxidation occurs at the anode while reduction occurs at the cathode in a galvanic cell.

The oxidation half equation at the anode occurs as follows;

3Sn(s) → 3Sn^2+(aq) + 6e

The reduction half equation that occurs at the cathode is;

2NO3–(aq) + 8H+(aq) + 6e→  2NO(g) + 4H2O(l)

We can see that electron loss occurs at the cathode while electron gain occurs at the anode as we can see in the equations above.

Learn more: https://brainly.com/question/13440572?

Answer:

react with metals to produce hydrogen gas

Explanation:

NaOH is a common base and is a strong base. Look what happens with it reacts with a metal:
OH- (aq) + Li(s) --> LiOH. It forms a salt not H2

(I removed spectator ions)

Yes Lactic acid is a monotropic acid.

Lactic acid, a chemical responsible for muscle fatigue, is a monoprotic acid.

A monoprotic acid is a kind of acid that can donate only one hydrogen ion per molecule to an aqueous solution. In the case of lactic acid, it has only one hydrogen ion to donate. Therefore, it is a monoprotic acid.

Lactic acid is the chemical responsible for muscle fatigue. When the body performs anaerobic exercises such as sprinting or weight lifting, it rapidly produces ATP without sufficient oxygen and leads to lactic acid release leading to muscle pain. This the reason for muscle pain after heavy exercises.

To know more about Monotropic acid visit:

https://brainly.com/question/29068526

#SPJ11

Answer:

d

Explanation:

Answer:The zero to the left of a decimal value less than 1 is not significant. All trailing zeros that are placeholders are not significant. Zeros between non-zero numbers are significant.

Explanation:I hoped i have helped u have an wonderful day or night

The given statement, "the pentose phosphate pathway can be characterized as an anabolic pathway" is true.

The pentose phosphate pathway, also known as the phosphogluconate pathway or hexose monophosphate shunt, is an important metabolic pathway that functions alongside glycolysis, the citric acid cycle, and oxidative phosphorylation, among others, to produce energy in the form of ATP or NADPH for a variety of cellular processes.

The pentose phosphate pathway plays an essential role in anabolic reactions, including DNA and RNA synthesis, as well as the synthesis of NADPH, an essential cofactor for biosynthesis reactions. In addition, the pathway is crucial for antioxidant protection, as it helps to prevent oxidative stress by producing NADPH, which is used to regenerate glutathione, a potent antioxidant.

To learn about the pentose phosphate pathway here:

https://brainly.com/question/29311215

#SPJ11

b) FALSE A feasible solution must attempt to satisfy all the major constraints in the problem.

A basic viable solution in the theory of linear programming is one that has a small number of non-zero variables. Each viable solution polyhedron's corner correlates geometrically to a BFS. There must be an optimum BFS if there is an optimal solution.

to learn more about feasible solution go to -

https://brainly.com/question/15398513

#SPJ4

Answer:

10

Explanation:

Khan Academy

As pH = log [H+]  so we monitor the pH change and then calculate the change in HCL concentration. We can then calculate the reaction rate for that time frame.

What is known as hydrochloric acid, sometimes known as muriatic acid, is an aqueous solution of hydrogen chloride. It is colorless and has an unmistakable pungent odor. It falls within the category of a potent acid.

The rate at which a chemical reaction advances is known as the reaction rate. The concentration of a reactant that is consumed in a unit of time or the concentration of a product that is produced in a unit of time are two common ways to define it (amount per unit volume).

To know more about Rate of reaction visit:

https://brainly.com/question/8592296

#SPJ10

If 35.2 g of hydrochloric acid react with excess of magnesium, 5.03 g of hydrogen are produced.

The balanced chemical equation for the reaction is:

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)

We are given that 35.2 g of hydrochloric acid react.

The molar mass of hydrochloric acid is 36.46 g/mol.

This means that there are 35.2 / 36.46 = 0.97 moles of hydrochloric acid in the reaction.

According to the balanced chemical equation, 1 mole of hydrochloric acid produces 1 mole of hydrogen gas.

So, 0.97 moles of hydrochloric acid will produce 0.97 moles of hydrogen gas.

The molar mass of hydrogen gas is 2.016 g/mol.

This means that 0.97 moles of hydrogen gas have a mass of 0.97 * 2.016 = 5.03 g.

To learn more about molar mass: https://brainly.com/question/30640134

#SPJ11

atroodee vastroodeee,your phone is on light modeeee

The speed of the race car in kilometers per hour would be 159 kilometers/hour, and in kilometers per minute would be 2.7 kilometers/minute.

To convert miles per hour to kilometers per hour, we need to multiply the speed by the conversion factor of 1.61, which represents the number of kilometers in one mile.

So, the speed of the race car in kilometers per hour would be:

99 miles/hour × 1.61 kilometers/mile = 159.39 kilometers/hour

To convert kilometers per hour to kilometers per minute, we need to divide the speed by the number of minutes in one hour, which is 60.

So, the speed of the race car in kilometers per minute would be;

159.39 kilometers/hour ÷ 60 minutes/hour

= 2.66 kilometers/minute

Therefore, the speed of the race car is 159 kilometers/hour, and 2.7 kilometers/minute.

To know more about speed here

https://brainly.com/question/7359669

#SPJ1

Answer:

Medical Scientists  and  Biochemists and Biophysicists

Hope This Helps!!

Answer:

its Medical Scientists  and  Biochemists and Biophysicists

Explanation:

i got it right

To form a charge of q1 = -9 nC, approximately 5.61 x 10^10 electrons are needed.  To determine the number of electrons needed to form a charge of q1 = -9 nC, we can use the elementary charge (e) as a reference.

The elementary charge is the charge carried by a single electron, and its value is approximately 1.602 x 10^-19 C.

The number of electrons (n) can be calculated using the formula:

n = q1 / e

Substituting the values, we have:

n = -9 nC / (1.602 x 10^-19 C)

Calculating the result:

n ≈ -5.61 x 10^10 electrons

Therefore, approximately 5.61 x 10^10 electrons are needed to form a charge of q1 = -9 nC.

To know more about electrons ,visit:

https://brainly.com/question/860094

#SPJ11

we can conclude that the scale is precise but not accurate. The correct option is d.This means that the scale consistently gives the same measurements, but they are not accurate or close to the true value.

To understand whether the scale is precise, accurate, both, or neither, we need to define these terms. Precision refers to the consistency or reproducibility of measurements, while accuracy refers to how close the measured value is to the true or accepted value. In this case, the true value is 1.000g, and the measurements captured are 0.843 g, 0.842 g, and 0.843 g.Looking at these measurements, we can see that they are not accurate since none of them are close to 1.000g. However, we can also see that they are precise since they are all very similar to each other, with a difference of only 0.001g between the highest and lowest measurement.
Therefore, To improve accuracy, the scale may need to be recalibrated or replaced.

learn more about precise Refer: https://brainly.com/question/30641212

#SPJ11

complete question: Testing precision and accuracy of scale, weigh block exactly 1.000g. these are measurements captured:

a. 0.843 g

b. 0.842 g

c. 0.843 g

d. Is the scale precise, accurate, both, or neither?

The element that we can be able to use for the experiment in place of potassium is sodium.

We know that the elements that can be found in the same group does react in the same way. Now we know that we have to look about among the options so that we would be able to know element that is in the same group as potassium.

Given that both sodium and potassium are members of group 1, we have to look out for the element that element thus we have to select sodium.

Learn more about group of elements:https://brainly.com/question/5460947

#SPJ1

Explanation:

A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.

When potassium phosphate reacts with silver nitrate, it leads to the formation of silver phosphate and potassium nitrate.

The balanced chemical equation follows:

\(3AgNO_3+K_3PO_4\rightarrow Ag_3PO_4+3KNO_3\)

When barium bicarbonate reacts with calcium hydroxide, it leads to the formation of barium carbonate, calcium carbonate and water

The balanced chemical equation follows:

\(Ba(HCO_3)_2+Ca(OH)_2\rightarrow BaCO_3+CaCO_3+2H_2O\)