Write the net ionic equation for the precipitation reaction that occurs when aqueous magnesium chloride is mixed with aqueous sodium phosphate. Be sure to include the physical states of all species.

Answer:

21.92 gm

Explanation:

A 1.5 M  solution would have 1.5 * 58.44 = 87.66 gm per liter

   you only need 1/4 of this (250 ml)    =  21.92 gm

An explosión happens when asteroids collide.

When asteroids collide, little bits are expelled at orbital speeds that are slower than the original asteroids'.

When asteroids collide, the ejected pieces have speeds that are low compared to the original asteroid's orbital speed. As a result, the pieces' orbits are near to one another, creating a "family" of smaller asteroids.

A massive impact between two asteroids may have caused the Earth to enter an ice age some 466 million years ago. The asteroid that was destroyed by the cosmic collision between Mars and Jupiter, which was around 93 miles (150 km) broad, was covered in a dense cloud of dust that travelled across the inner solar system.

The asteroids that might destroy the world if they struck the Earth are exceedingly uncommon. They would most likely need to be around a kilometre apart.

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Answer:

Explanation:

Based on the information given in the graphic, we can determine that the atom has 12 protons and 12 neutrons, which would give it an atomic mass of 24. However, the graphic does not provide information about the number of electrons, which would be necessary to determine the element's location on the modern periodic table.

Therefore, none of the answer choices provided can be determined from the information given. We cannot identify the group or period of the element on the modern periodic table based solely on the number of protons and neutrons in the atom.

The physical quantity that is provided directly by the Gibbs free energy change, in general, is the maximum amount of work that can be done by a thermodynamic system at constant temperature and pressure. This is represented by the equation: ΔG = ΔH - TΔS

The Gibbs free energy change (ΔG) is the difference between the enthalpy change (ΔH) and the product of the temperature (T) and the entropy change (ΔS). This equation is used to determine the maximum amount of work that can be done by a system at constant temperature and pressure. If the Gibbs free energy change is negative, the reaction is spontaneous and will occur without the input of external energy. If the Gibbs free energy change is positive, the reaction is non-spontaneous and will not occur without the input of external energy.

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In 0.75 moles of caffeine, there are a total of 6 carbon atoms, 7.5 hydrogen atoms, 3 nitrogen atoms, and 1.5 oxygen atoms.

To determine the total number of atoms in 0.75 moles of caffeine, we need to consider the molecular formula of caffeine, which is C8H10N4O2. The molecular formula provides the ratios of each element present in the compound. By multiplying the number of atoms in each element by the corresponding coefficient in the molecular formula, we can calculate the total number of atoms. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms in each molecule of caffeine. Multiplying these values by 0.75 moles will give us the total number of atoms in 0.75 moles of caffeine.

The molecular formula of caffeine, C8H10N4O2, provides the number of atoms for each element present in one molecule of caffeine. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms.

To calculate the total number of atoms in 0.75 moles of caffeine, we need to multiply the number of atoms for each element by the coefficient in the molecular formula, and then multiply that by the number of moles (0.75 moles).

For carbon (C): 8 atoms x 0.75 moles = 6 atoms (since there are 8 carbon atoms in one molecule of caffeine).

For hydrogen (H): 10 atoms x 0.75 moles = 7.5 atoms (since there are 10 hydrogen atoms in one molecule of caffeine).

For nitrogen (N): 4 atoms x 0.75 moles = 3 atoms (since there are 4 nitrogen atoms in one molecule of caffeine).

For oxygen (O): 2 atoms x 0.75 moles = 1.5 atoms (since there are 2 oxygen atoms in one molecule of caffeine).

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Answer:

ll assume that you’re talking about the type of precipitation that occurs when an insoluble salt is formed by the mixture of two salt solutions. A common example is:

AgNO3(aq) + NaCl(aq) - - - - -> AgCl(s) + NaNO3(aq)

Before the reaction, we have two aqueous solutions, one of which contains dissolved Ag+ and NO3- ions, and the other Na+ and Cl- ions. When they’re mixed, there is momentarily a solution with all four ions mixed together. AgCl then immediately precipitates from the solution as a solid, while Na+ and NO3- remain in the solution.

In order to understand why this occurs, we need to understand that solvation is a process that is subject to the usual concepts of equilibrium. Each of the possible salt combinations has a solvation equilibrium. The one for silver chloride is:

AgCl(s) <- - - - -> Ag+(aq) + Cl-(aq)

This reaction has an equilibrium constant, which we write down according to the usual rules, and which is determined by the molar free energy change of reaction:

K_sp = [Ag+][Cl-]/[AgCl]

Since AgCl here represents the pure solid, its activity is unity, therefore

K_sp = [Ag+][Cl-]

Solid silver chloride will be in equilibrium with dissolved Ag+ and Cl- when the ion activity product [Ag+][Cl-] is equal to the equilibrium constant. Therefore,

If [Ag+][Cl-] is less than K_sp, solid AgCl will keep dissolving until [Ag+][Cl-] becomes equal to K_sp (or all the solid AgCl runs out).

If [Ag+][Cl-] is more than K_sp, solid AgCl will precipitate from the solution until [Ag+][Cl-] becomes equal to K_sp. At this point, equilibrium will exist between Ag+, Cl-, and AgCl.

Note that in a chemical system with many different components, all possible reactions must reach equilibrium in order for the entire system to be at equilibrium. Therefore, when [Ag+][Cl-] is more than K_sp for AgCl, precipitation will occur regardless of the other ions in solution. The only way to prevent precipitation from occurring is to have some side reaction that consumes Ag+ or Cl- until their activities fall sufficiently for [Ag+][Cl-] to be less than K_sp for AgCl.

So, while Ag+ and Cl- are happy sitting in solution when those are two separate solutions, once you bring them together, AgCl must form in order for equilibrium to be attained. The solubility equilibrium for NaNO3 must also be considered, but since NaNO3 is highly soluble, it won’t precipitate. Thus, when combining solutions containing different ions, you can predict whether a precipitate forms by identifying the ion combinations that form poorly soluble salts such as AgCl, and determining whether the ion activity product exceeds K_sp for that salt.

However, if you mix aqueous AgNO3 with aqueous NaCl that contains a sufficient quantity of dissolved ammonia, then no precipitate will form. This is because there is a new equilibrium involved:

Ag+(aq) + 2NH3(aq) <- - - - -> [Ag(NH3)2]+

This equilibrium lies far to the right, so almost all the Ag+ will be removed from solution, becoming bound up in the complex diamminesilver ion instead. Because of this, [Ag+][Cl-] might not exceed K_sp when the two solutions are mixed, resulting in no precipitate.

(The astute reader would point out that we also need to check whether {[Ag(NH3)2]+}{Cl-} exceeds the solubility product for [Ag(NH3)2]Cl. The answer is that this salt has a large mismatch in the sizes of its cation and anion, and the N-H bonds in the ammine ligands form strong hydrogen bonds with water molecules, so we can predict that its solvation is very favourable, and it’s unlikely to precipitate.)

The volume of the methanol in the sample is 252.58 mL

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can obtain the volume of the methanol. Details below

The following data were obtained from the question;

Density = mass / volume

Thus,

Volume = mass / density

Volume of methaonl = 200 / 0.7918

Volume of methaonl = 252.58 mL

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Answer:

two hydrogen can bonded with oxygen to form H2O

Answer:

X linked recessive

Explanation:

Being an X linked recessive a disorder is more prevalent in males as compared to females because a single X chromosome in male is able to expresses the trait.

In case of female untill unless there are two sets of X linked recessive allele, there will be no disorder. Infact most of the women are carrier only

Answer:

Jacques-Louis David; Oath of the Horatii.

Explanation:

1. The activation energy for the reaction is 30 KJ

2. The change in energy for the reaction is -20 KJ

3. The reaction is exothermic

4. The letter that represents the products is B

5. The letter that represents the reactants is A

The activation energy for the reaction can be obtained as follow:

Activation energy = Peak energy - Energy of reactant

Activation energy = 70 - 40

Activation energy = 30 KJ

The change in energy can be obtain as follow:

Change in energy = Energy of product - energy of reactant

Change in energy = 20 - 40

Change in energy = -20 KJ

From the above calculation, we can see that the change in energy is negative (i.e -20 KJ).

Thus, we can conclude that the reaction is exothermic reaction.

The letter which represents products given the energy diagram is letter B

The letter which represents reactants given the energy diagram is letter A

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The most appropriate reagent(s) for the conversion of trans-4-tert-butylcyclohexanol to the corresponding tosylate ester is Chromic acid.

What is Chromic acid?

Chromic acid anodizing has been used to protect aluminum from oxidation for many years. The anodizing process builds a basic oxide layer that supports a tubular cell structure. Chromic acid (H2CrO4) reacts with alcohols to form a chromic ester in which the alcohol oxygen atom bridges the carbon and chromium atoms. The ester forms by nucleophilic attack of the alcohol oxygen atom on the chromium atom. This reaction is analogous to an SN2 reaction with an a─OH group of chromic acid as the leaving group.

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Answer:The pH of a buffer prepared by adding 1.00 L of 1.0 M HCl to 750 ml of 1.5 M NaHCOO is 2.84

What is pH?

pH is a measure of the acidity of a solution.

pH is calculated from the negative logarithm to base ten of the hydrogen ions concentration of the solution.

For weak acids such as those used in the preparation of buffers, the acid dissociation constant, Ka are used to determine the pH of the solution.

Therefore, from the Ka of acetic acid, the pH of a buffer prepared by adding 1.00 L of 1.0 M HCl to 750 ml of 1.5 M NaHCOO is 2.84

Answer:

1.88 x 10^5

Explanation:

You have to round because all of the numbers in 187515.4207 are significant

Round to: 188000

Put in scientific notation:

1.88 x 10^5

Answer:

well scientific notation would be = 1.875154207 × 10^5

you cant rlly simply the number any further to get 3 sig figs

youd need something like 187 to be 3 sig figs

are you saying the question correctly?

Answer:

4H₂O(l) → 4H₂(g) + 2O₂(g)

Balancing equations

1. 3Fe(s) + 4H₂O(g) → Fe₃0₄(s) + 4H₂(g)

2. 2AlBr₃(aq) + 3Cl₂(g) → 2AlCl₃(aq) + 3Br₂(l)

3. 2HNO₃(aq) + Ba(OH)₂(aq) → Ba(NO₃)₂(aq) + 2H₂O(l)

4. 2Al(s) + 3Pb(NO₃)₂ → 2Al(NO₃)₃(aq) + 3Pb(s)

5. 3NaOH(aq) + Fe(NO₃)₃ → Fe(OH)₃(s) + 3NaNO₃(aq)

Explanation:

From the question given, I have been able to balance the chemical equations correctly.

In balancing chemical equations, the chemical equation must have equal number of atoms for each element that are both in the reactant side and in the product side.

For the above to be achieved, the number of atoms in each element will have to be multiplied and added.

A look at the balanced chemical equation above, you will discover that each element has the same number of atoms both in the reactant side and in the product side.

Answer: b

Explanation:

Answer:

9000J

Explanation:

Given parameters:

Mass of the jet fighter  = 5kg

Velocity  = 60m/s

Unknown:

Kinetic energy of the jet fighter  = ?

Solution:

The kinetic energy of a body is the energy due to motion of the body.

It is mathematically expressed as;

    K.E  = \(\frac{1}{2}\) m v²

m is the mass

v is the velocity

 So;

     K.E  =  \(\frac{1}{2}\)  x 5 x 60²  = 9000J

Answer:

mushroom

Explanation:

\(KCl(ag) + AgNO_3(aq)\) → \(KNO_3(aq) + AgCl(s)\) is the precipitation reactions.

A precipitate is an insoluble substance. A reaction in which insoluble solid precipitate is formed is called Precipitation Reaction.

For example, When Sodium Sulphate solution is mixed with Barium Chloride solution It forms Barium Sulphate and Sodium Chloride solution.

Precipitation reactions are usually double displacement reactions involving the production of a solid form residue called the precipitate.

These reactions also occur when two or more solutions with different salts are combined, resulting in the formation of insoluble salts that precipitate out of the solution.

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Answer:

Q = 4180 J

Explanation:

Given data:

Mass of water = 10.0 g

Initial temperature = 0°C

Final temperature = 100°C

Heat required = ?

Solution:

Specific heat capacity of water is 4.18 j/g.°C.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 100°C - 0°C

ΔT = 100°C

Q = 10.0 g ×4.18 j/g.°C × 100°C

Q = 4180 J

The volume of the carbon dioxide that is formed would be  59 L.

The first things that we would have to do is that we must be able to balance the reaction equation for the reaction that have been written here. And when we balance the reaction equation then we are going to have what I have written in the line below;

2C4H10 + 13O2 → 8CO2 + 10H2O

Thus;

Number of moles of the butane is

38 g/58 g/mol

= 0.66 moles

If 2 moles of butane produces 179.2 L of CO2

0.66 moles of butane will produce 0.66 * 179.2 /2

= 59 L

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Answer:

Another method tested in study to produce sodium polyacrylate as an alternative to current methods began with Butyl acrylate acrylic acid copolymer and poly(butyl acrylate)

Explanation:

They were synthesized via suspension polymerization by using butyl acrylate as the main monomer and acrylic acid as the secondary monomer

I suggest you get more info from wikipedia cause it helped me alot

The monomers used to make sodium polyacrylate polymer chains acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) .

Monomers are small organic molecules that have the capability to bond to form larger molecules known as polymers.

The reaction between acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) produces sodium polyacrylate.

A long-chain copolymer made up of alternate units of acrylic acid and sodium acrylate is the result of this process.

Acrylic acid and sodium acrylate form a copolymer, which is a polymer made up of two distinct monomers.

The monomers used to make sodium polyacrylate polymer chains acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) .

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One testable question is "How well do different materials sink or float in water?"

One non-testable question is "What makes something sink or float?"

The term "non-testable" is used because, from the perspective of correctness testing, there is no benefit to performing the test. If it is impossible to determine whether the output is correct or requires an unusually long amount of time to do so.

Something like "the ball falls to the ground because naughty invisible unicorns want it to" would be an untestable hypothesis. The theory that these unicorns are responsible for gravity is not scientific if they cannot be found using any scientific instrument.

Therefore, the questions are:

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Answer: good

Explanation:

 tyuk

Answer:

The molarity of the diluted solution will be 0.208 M.

Explanation:

Dilution consists of a procedure to prepare a less concentrated solution from a more concentrated one. It is achieved by adding more solvent to the same amount of solute.

The quantity or mass of the solute is not changed but only that of the solvent. As only solvent is being added, the consequence is that by not increasing the amount of solute but if the amount of solvent, the concentration of the solute decreases.

The expression for a dilution is:

Ci * Vi = Cf * Vf

where

In this case:

Replacing:

0.25 M* 125 mL= Cf* 150 mL

Solving:

\(Cf=\frac{0.25 M*125 mL}{150 mL}\)

Cf= 0.208 M

The molarity of the diluted solution will be 0.208 M.

Answer:

phosphorous(iii) oxide

Explanation:

Hope this helps! :)

Considering the two acids and bases involved, the reverse reaction is favored.

The term reversible reaction refers to a reaction that can go either forward or backwards depending on the conditions of the reaction.

We must recall that acetic acid is a weak acid hence the equilibrium position would always lie towards the left hand side of the equation. Hence considering the two acids and bases involved, the reverse reaction is favored.

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Fractional distillation is more efficient than simple distillation in separating two miscible liquids because it utilizes a fractionating column, which provides multiple stages for vapor-liquid contact.

Fractional distillation is a method used to separate two or more miscible liquids based on their boiling points. It involves the use of a fractionating column, which is a tall column packed with materials such as glass beads or metal plates. The column provides numerous stages where vapor and liquid can come into contact.

During fractional distillation, the mixture is heated, and the vapor rises through the fractionating column. As the vapor ascends, it cools down, and when it reaches a stage with a temperature below its boiling point, it condenses and returns to the liquid phase. This process is repeated as the liquid continues to evaporate and condense multiple times while moving up the column.

The fractionating column allows for efficient separation because it provides a large surface area for vapor-liquid contact. The repeated evaporation and condensation cycles enhance the separation of the different components in the mixture. The compounds with lower boiling points will tend to condense and collect at the higher stages of the column, while those with higher boiling points will condense and collect at the lower stages.

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Answer:Material X would be classified as a crystalline solid because atoms are in a highly ordered three-dimensional arrangement.

Explanation: it makes sense I'm sorry if its wrong