the molar solubility of mg(cn)₂ is 1.4 × 10⁻⁵ m at a certain temperature. determine the value of ksp for mg(cn)₂.

Answer:

Explanation:

1. LiBr   -      Lithium bromide

2. Cal₂   - Calcium iodide

3. Al₂0₃  - Aluminium oxide

4. Mg₃N₂  - Magnesium nitride

5. FeCl₂   Ferrous chloride [ Iron(II) chloride ]

6. FeCl₃   Ferric chloride   [ Iron(III) chloride ]

7. Cu₃N₂  Copper nitride

8. Ni₂O₃  Nickel(III) oxide

9. Al(SO4)₃ Aluminium sulphate

10. Ca₃(PO4)₂ Copper phosphate

11. Fe(OH)₂ Iron (II)  hydroxide

12. (NH4)₂S Ammonium sulphide

13. Na₂O   Sodium oxide

14. NH₃     Ammonia

15. SO₄²⁻  Sulphate ion

Answer:

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes beginning moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.

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The balanced equation for the single-displacement reaction between AgNO3 and Al is:
3AgNO3 + Al -> Al(NO3)3 + 3Ag

In this reaction, aluminum (Al) displaces silver (Ag) from silver nitrate (AgNO3), resulting in the formation of aluminum nitrate (Al(NO3)3) and elemental silver (Ag).

The coefficients in the balanced equation ensure that the number of atoms of each element is the same on both sides of the equation, indicating a conservation of mass.

Phases (solid, liquid, aqueous) can be included if known, but they are optional for this equation.

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Answer: The ratio of carbon to bromine atoms  in the molecule is 3:1

Explanation:

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. It can be decomposed into simpler constituents using chemical reactions.

Chemical formula shows the elements in a compound and the relative proportions of those elements.

The chemical formula given for the compound is \(C_3H_6BrCl\) which means the ratio of carbon to bromine atoms is 3: 1.

Thus the ratio of carbon to bromine atoms  in the molecule is 3:1

The required number of moles of C that must fully react to produce 2. 0 moles of \(C_{2} xH_{6}\) is  2.

The balanced equation for the reaction of carbon (C) and hydrogen (H2) to produce ethane (C2H6) is:

C + 2H2 -> C2H6

From the balanced equation, we can see that for every 1 mole of carbon that reacts, 2 moles of hydrogen are also required. Therefore, in order to produce 2 moles of C2H6, we need 2 moles of hydrogen.

Since the balanced equation states that for every 1 mole of C we need 2 moles of H2, we can say that we need 2*2 =4 moles of hydrogen.

So the number of moles of C that must completely react to produce 2.0 moles of C2H6 is 2 moles.

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The moles would be 12 moles, 4 moles and 11.34 moles

When hydrogen gas (H2) reacts with oxygen gas (O2) to produce water (H2O), the balanced chemical equation is:

2H2 + O2 -> 2H2O

So,

For every 6 moles of H2, 12 moles of H2O will be produced

For every 2 moles of H2, 4 moles of H2O will be produced

For every 5.67 moles of H2, 11.34 moles of H2O will be produced.

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The experiment with 50.0mL of HCl(aq) will have the faster initial rate of formation of CO2(g) because the acid will catalyze the reaction, increasing the reaction rate significantly.

The presence of the HCl(aq) will decrease the activation energy of the reaction, allowing it to occur at a faster rate. The reaction will also be occurring in an aqueous solution, which increases the rate of reaction due to the increased mobility of the reactants.

The reaction that occurs in the experiment with 50.0mL of HCl(aq) is as follows: HCl(aq) reacts with calcium carbonate (CaCO3) to form calcium chloride (CaCl2), carbon dioxide (CO2), and water (H2O). The reaction can be represented by the following chemical equation:

CaCO3 + 2HCl(aq) → CaCl2 + CO2 + H2O

The HCl(aq) acts as a catalyst in this reaction, meaning it is not consumed in the reaction but facilitates it.

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Answer:

B. The reactants form additional unexpected products.

Explanation:

The incorrect statement regarding capillary electrophoresis sample injection is option A: Hydrodynamic injection is most useful for capillary sieving electrophoresis, in which the liquid in the capillary is too viscous for electrokinetic injection.

Hydrodynamic injection is not used for capillary sieving electrophoresis, but rather for capillary zone electrophoresis (CZE) and capillary isoelectric focusing (CIEF) methods. In CZE and CIEF, the sample is introduced into the capillary by applying pressure to the sample vial, which drives the sample into the capillary. Hydrodynamic injection is particularly useful when the sample volume is small or when the sample matrix is incompatible with electrokinetic injection.Capillary sieving electrophoresis, on the other hand, uses a gel-filled capillary and separation is based on molecular size. The sample is usually introduced by electrokinetic injection, which applies an electric field to the sample, driving it into the capillary. Therefore, option A is the incorrect statement.

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Answer:

Mass and Volume

Explanation:

The formula for density is

\(\frac{Mass}{Volume}\)

Answer:

The biological pump or the marine carbon pump is the title for multiple processes leading to separation of carbon from multiple sources of water. Biological pumping is partially responsible for the cycling of organic matter. This process can lead to loss of contact between carbon and the atmosphere for thousands of years.

Hope this helped!

Answer:

32 gm O

Explanation:

there are 16 gm of O in each 18 gm of water ....the other two grams are H

so there would be 32 gm of oxygen in 36 gm water

Answer:

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PASSWORD:XCNeV3

Explanation:

Answer:

It would be an isotope.

Background Information:

Isotopes are typically elements that have a different number of protons than neutrons. The atomic mass is the total number of protons and neutrons. The atomic number is the number of protons.

Explanation:

If the atomic number is the number of protons that means that this particular element has 8 protons. If the atomic mass is the total number of protons and neutrons then we can simply take away the amount of protons from that number, 18 - 8 = 10. If we take protons away from the number of protons and neutrons we are left with the number of neutrons. So there are 10 neutrons. Because there are 8 protons and 10 neutrons, or a different amount of neutrons and protons we know that this particular atom is an isotope.

It would be an isotope.

Isotopes are elements that have the same number of electrons and protons but different numbers of neutrons. The atomic mass is the total number of protons and neutrons. The atomic number is the number of protons.

If the atomic number is the number of protons that means that this particular element has 8 protons. If the atomic mass is the total number of protons and neutrons then protons

18 - 8 = 10

If we take protons away from the number of protons and neutrons we are left with the number of neutrons. So there are 10 neutrons. Because there are 8 protons and 10 neutrons, or a different amount of neutrons and protons. So, the particular atom is an isotope.

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Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).

Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.

In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.

Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

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Answer:

Gravitropism also known as geotropism is a coordinated process of differential growth by a plant in response to gravity pulling on it. When laid onto its side, the growing parts of the stem begin to display negative gravitropism, this could aslo be a sign of tromism of growing upwards. Tropism is very common and if you see a weird looking tree with even a weird looking stump than even that could be classified as Gravitropism.

Answer:

17. 10 atoms

18. 21 atoms

Explanation:

17. 2 Phosphurus and 8 Oxygen

18. 6 Sodium, 3 Sulfur, and 12 Oxygen

By observing the reactions and the formation of precipitates, we can determine whether the unknown solution is strontium nitrate or magnesium nitrate.

What is an  unknown solution?

There are two possible reactions that could occur when potassium carbonate or potassium sulfate are added to the unknown solution:

To determine which of these reactions occurred, we need to observe which reaction produced a precipitate (an insoluble solid) and which did not.

If a precipitate forms when potassium carbonate is added to the unknown solution, then the unknown solution must have been magnesium nitrate. The balanced molecular equation for this reaction is:

\(Mg(NO_{3}){2}\) (aq) + \(K_{2} CO_{3}\) (aq) → \(MgCO_{3}\) (s) + 2\(KNO_{3}\) (aq)

If no precipitate forms when potassium carbonate is added, but a precipitate forms when potassium sulfate is added, then the unknown solution must have been strontium nitrate. The balanced molecular equation for this reaction is:

\(Sr(NO_{3})_{2}\) (aq) + \(K_{2}SO_{4}\) (aq) → \(SrSO_{4}\) (s) + \(2KNO_{3}\) (aq)

By observing the reactions and the formation of precipitates, we can determine whether the unknown solution is strontium nitrate or magnesium nitrate.

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Answer:

C. Balanced forces

Explanation:

What do the arrows in the photograph represent Balanced forces

The correct name for NO₂ is nitrogen dioxide.

NO₂ is a chemical compound composed of one nitrogen atom and two oxygen atoms. It is a reddish-brown gas with a pungent odor and is a major component of air pollution.

Nitrogen dioxide is an important intermediate in the formation of smog and acid rain in the atmosphere. It is also used as a reagent in the production of nitric acid, which is used in the production of fertilizers and explosives. Exposure to high concentrations of NO₂ can cause respiratory problems and contribute to the development of asthma and other lung diseases.

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Answer:

Litmus paper is one type of acid-base indicator. The paper is imbued with dye derived from lichens that change color in response to the presence of an acid or base. ... Red paper is used to detect alkaline pH and will turn a shade of blue in the presence of a basic solution.

Answer:

Oxygen reacts with the carbon anode to form carbon dioxide. Therefore, the anode gradually oxidizes. They must be replaced frequently, which increases the cost of aluminum production.

Answer:

They are stronger than hydrogen bonding forces

Answer:

They occur between polar molecules.

Explanation:

I was answering the test and searched through my notes. This is the correct one.

Proof:

Check the attached picture.

Answer: In the reaction 2H2S + 3O2 → 2H2O + 2SO2, the oxidation state of sulfur changes from -2 in H2S to +4 in SO2. This means that sulfur is oxidized, and oxygen is reduced.

Explanation:

The oxidation state of an element is the number of electrons that an atom loses or gains when it forms a chemical bond. In H2S, the sulfur atom has an oxidation state of -2 because it has lost two electrons to the hydrogen atoms. In SO2, the sulfur atom has an oxidation state of +4 because it has gained four electrons from the oxygen atoms.

The oxidation state of oxygen changes from 0 in O2 to -2 in H2O and SO2. This means that oxygen is reduced, and sulfur is oxidized. In O2, the oxygen atoms are not bonded to any other atoms, so they have an oxidation state of 0. In H2O and SO2, the oxygen atoms have an oxidation state of -2 because they have gained two electrons from the hydrogen and sulfur atoms, respectively.

Element Oxidation state in H2S         Oxidation state in SO2        Oxidation state in H2O

Sulfur                      -2   +4       +4

Oxygen                       0   -2       -2

Hydrogen              +1   +1       +1

The half-life of a radioactive substance (in minutes) which loses 69. 3% of its original intensity in 2.00 hours is 119.49 minutes.

Generally, the half-life, in radioactive material, is defined as the amount of time needed for half of a radioactive sample's atomic nuclei to decay, or, alternatively, it is also defined as the amount of time needed for a radioactive object's rate of disintegration per second to decrease by half.

As per the given data, the question,

k = 2.303/t log (100)/(100 - x)

k  = 2.303/120 log (100)/(100 - 69.3)

k = 0.012 × 0.487

k = 0.0058 min⁻¹.

Use the equation to calculate, Half-life = 0.693/k

Substitute the value of k,

Half-life = 0.693/0.0058

Half-life = 119.49 minutes.

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Answer:

An aqueous solution is water that contains one or more dissolved substances. The dissolved substances in an aqueous solution may be solids, gases, or other liquids.

There are two properties that can be used to identify an element: the atomic number or the number of protons in an atom. The number of neutrons and number of electrons are frequently equal to the number of protons, but can vary depending on the atom in question.

Answer: There are 78.26 mL of a 0.0023M strontium hydroxide solution are needed to completely react 15.0 mL of 0.012M hydrochloric acid.

Explanation:

Given: \(M_{1}\) = 0.0023 M,          \(V_{1}\) = ?

\(V_{2}\) = 15.0 mL,           \(M_{2}\) = 0.012 M

Formula used to calculate volume of strontium hydroxide solution is as follows.

\(M_{1}V_{1} = M_{2}V_{2}\)

Substitute the values into above formula as follows.

\(M_{1}V_{1} = M_{2}V_{2}\\0.0023 M \times V_{1} = 0.012 M \times 15.0 mL\\V_{1} = 78.26 mL\)

Thus, we can conclude that there are 78.26 mL of a 0.0023M strontium hydroxide solution are needed to completely react 15.0 mL of 0.012M hydrochloric acid.

Answer:

Sun

Explanation:

Answer:

earth

Explanation:

Explanation:

leading zeros do not count as significant figures, Hence, this number correct to four significant figures should be written as in option E.