If x represents the molar solubility of Ba3(PO4)2, what is the correct equation for the Ksp? Select one: O Ksp = (3.c)2(2x)3 Ksp = (3x) (2x) O Ksp = (x)3(x)2 Ksp = (3x)3(2x)2 ОКsp

As the plane  plane flies at a constant speed of 800 km/hr the plane will take 5 hours 25 minutes to  fly   distance of 4200 km.

Speed is defined as the rate of change of distance with time. It has the dimension of distance by time. Thus, the SI unit of speed is given as the combination of the basic unit of distance and the basic unit of Time. Thus, the SI unit of speed is metre per second. In everyday life, kilometre per hour or in countries like US and UK miles per hour are used as the unit of speed.

The SI unit of speed can be derived from the formula of velocity. Basically, velocity is the vector equivalent of speed. Mathematically, velocity is given as the ratio of displacement to the time taken.So, 800 km is traveled in 1 hour so 4200 km will be traveled 4200/800=5.25 which is 5 hours and 25 minutes.

Thus, the plane will take 5 hours 25 minutes to  fly   distance of 4200 km.

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Answer:

sample A

Explanation:

the first one because of the ppm value

Explanation:

Buffer solution is that which is made of weak acid .

Solubility decreases with increase in no of drops .

The number of molecules of SF₆ present in 25 g of SF₆ will be 1.03 x 10²³ .

Molar mass = 146.06 g/mol

Number of mole in 25 gm of SF₆ = 25 / 146.06 = 0.171

Now, number of molecules = 0.171 mole x 6.02 x 10²³ molecules

                                               = 1.03 x 10²³ molecules of SF₆

Hence, the number of molecules of SF₆ present in 25 g of SF₆ will be 1.03 x 10²³ .

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The absolute amount of the discrepancy or simply error between the measured value and the actual value is multiplied by 100 and divided by the actual value to determine the percent error.

Follow these easy procedures to determine the error rate-

1. Don't take into consideration any minus (-) signs when calculating the inaccuracy (by deducting the predicted value from the actual value). take the error's absolute value, etc.

Approximate Value - Exact Value = Absolute Error

2. Subtract the mistake from the accurate figure (sometimes, we may get a decimal number).

3. Relative error is the difference between the precise and approximative values.

4. Add a "%" following the conversion to a percentage (by multiplying by 100).

|Approximate Value - Exact Value|/Exact Value 100% Percent Error

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Answer:

c

Explanation:

because when you hold a solid in your hand does it move does it shift no it stays the same so it doesn't take the form of the container it's in cuz that's a liquid.

The evidence that refutes the statement is: 4 EVIDENCE: Scientists have observed galaxies are moving away from us.

According to the observations made by astronomers, galaxies in the universe are not only moving away from each other, but they are also moving away from us.

This phenomenon is known as the expansion of the universe, and it contradicts the idea that all matter and energy in the universe was initially concentrated in a tiny corner of space during the time of the big bang and has since filled up the entire universe.

The observation that galaxies are moving away from us suggests that the universe is expanding in all directions. This expansion implies that the universe was not initially confined to a specific location but rather underwent a rapid expansion from a highly dense and hot state.

Therefore, the idea that all matter and energy in the universe was initially concentrated in a small corner of space and then expanded to fill up the whole universe is inaccurate based on the evidence of the observed expansion of galaxies. Evidence 4

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Answer:

calcium is the correct answer :)

Answer

a c e f

Explanation:

transition metals are good conductors of heat and electricity and it can hammered  into shape easily and have high melting points.

Transition metal are the chemical elements which have valence electron and it can participate in chemical bonds formation process in two shells.

The position of the transition metals in periodic table is the middle portions of the long periods between the groups on the left-hand side and the groups on the right.

Most of the transition metals  are hard, strong, and lustrous and it has high melting and boiling points, good conductors of heat and electricity.

Some of the elements are important technologically are titanium, iron, nickel, and copper as they are used in electrical technology.

Other transition metals are used in useful alloys, with one another and with other metallic elements, dissolve in mineral acids, platinum, silver, and gold are some Nobel transition metal.

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If the arrow is pointed this way ->, there is only one H atom on the reactant side; however, if it is pointed this way <- , there are two H atoms. The correct option is A.

The majority of stars and the sun include it, and the giant Jupiter is primarily made of it. Water is where you'll find the most hydrogen on Earth. Less than 1 part per million cubic volume is all that is found of it as a gas in the air.

According to the Los Alamos, hydrogen makes up more than 90% of all atoms, which is equivalent to three quarters of the universe's mass. Hydrogen is named after the Greek terms hydro for "water" or genes for "forming."

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The complete question is -

Mg(OH)2 + NaCl ® MgCl₂ + NaOH

How many hydrogen atoms are on the reactant side?

A-1

B-2

C-4

D-8

Answer:

28.01 percent

Explanation:

Iron (III) sulphate, \(Fe_2(SO_4)_3\), has 2 atoms of Fe.

One atom of Fe has a molar weight of 56. Hence, 2 atoms of Fe would have a total molar weight of 56 x 2 = 112 g/mol

Molar weight of  \(Fe_2(SO_4)_3\) = 399.88 g/mol

Percentage Fe in \(Fe_2(SO_4)_3\) = 112/399.88 x 100%

                       = 28.01%

The percentage of iron is iron (III) sulphate is, therefore, 28.01 percent.

Answer:

Explanation:

False. The greater the concentration, the lower the freezing point.

Imines are the nitrogen analogues of aldehydes and ketones, containing a C=N bond instead of a C=O bond.

They are formed through the addition of a primary amine to an aldehyde or ketone, kicking out a molecule of water (H2O) in the process.

In this post we show some examples of the synthesis of imines, walk through the mechanism for their formation, provide a few of their reactions and compare their properties to those of aldehydes and ketones.

A primary amine is added nucleophilically to the carbonyl group of an aldehyde or ketone to begin the reversible process of amine production. After that, a proton transfer creates a carbinolamine, a neutral amino alcohol. The carbinolamine oxygen is acid protonated to create a better leaving group, which is then removed as water to create an iminium ion. The ultimate imine product is produced when nitrogen is deprotonated.

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Buffering systems work to maintain pH within normal limits by utilizing a combination of a weak acid and its conjugate base or a weak base and its conjugate acid to resist changes in pH when an acid or base is added to the system.

Buffering systems are essential for maintaining the pH of biological systems within narrow ranges, as deviations from optimal pH levels can disrupt cellular processes and affect overall organismal function. These systems involve the presence of a weak acid and its conjugate base or a weak base and its conjugate acid.

When an acid is added to a buffering system, the weak base component of the buffer reacts with the added acid, effectively neutralizing its effects and preventing a drastic decrease in pH. Similarly, when a base is added to the system, the weak acid component of the buffer reacts with the added base, preventing a significant increase in pH.

The buffering capacity of a system depends on the equilibrium between the weak acid and its conjugate base or the weak base and its conjugate acid. This equilibrium allows the system to resist changes in pH by absorbing or releasing protons (H⁺) in response to acid or base additions, helping to maintain a relatively stable pH within the desired range.

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the complete question is:

How do buffering systems function to maintain pH within normal limits?

Answer:

The gas volume remains constant

Explanation:

The volume stayed constant however the balloon may seem to have shriveled or deflated upon walking outside due to the helium condensing in  the cooler climate.

methanol is a weak nucleophile, it would tend to favor an SN1 mechanism over an SN2 mechanism. In an SN1 reaction, the leaving group departs first to form a carbocation intermediate, which is then attacked by the nucleophile.

The weak nucleophile would be more effective in the second step of this mechanism, where it attacks the carbocation intermediate, rather than in the first step where it would need to compete with the leaving group for the same site. The nature of the nucleophile is an important factor in determining the reaction mechanism in a nucleophilic substitution reaction (SN1 or SN2). An SN1 reaction typically occurs with a weak nucleophile and a good leaving group, where the rate-limiting step involves the formation of a carbocation intermediate. On the other hand, an SN2 reaction typically occurs with a strong nucleophile and a good leaving group, where the reaction proceeds in a concerted manner with no intermediate formation.

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The molar mass of dinitrogen triphosphide is  121 grams per mole.

The molar mass of dinitrogen triphosphide (N₂P₃) can be calculated by adding up the atomic masses of its constituent elements:

2 x atomic mass of nitrogen (N) + 3 x atomic mass of phosphorus (P)

The atomic mass of nitrogen is 14 g/mol and the atomic mass of phosphorus is 31 g/mol.

The molar mass of dinitrogen triphosphide is calculated as;

2(14 g/mol) + 3(31 g/mol)

= 121 g/mol

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An acid is able to produce ions in the aqueous solution because polar H-A bond break due to the attraction between H atoms and the O atoms of water.

When an acid is added to an aqueous solution, it produces hydrogen ions along with a conjugate base.

After dissolving in water, an acid splits up to form hydrogen ions or H+ ions which reacts with water molecules to form hydronium ions i.e. H3O+. The general formula of an acid shows that is is composed of a halogen atom, oxygen atom and hydrogen atoms.

Let's take this, the dissociation of HNO3 produces h+ ions and NO3- ions in water.

HNO3      ⇄     H+ + NO3-

These ions are responsible for electricity conduction. In the absence of water acids can not dissociate.

To put it simply, acids donate h+ ions only when they are added to water.

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The ratio of hydronium ion concentrations in solution at the pH that results in the highest MP (Metalloprotein) activity to that which results in the lowest MP activity can be calculated using the equation for pH, which is -log[H+]. Since pH and [H+] are inversely proportional, a higher pH value indicates a lower [H+] concentration. Therefore, the ratio of hydronium ion concentrations would be the inverse of the ratio of pH values.

In simpler terms, if the pH resulting in the highest MP activity is 8 and the pH resulting in the lowest MP activity is 4, then the ratio of hydronium ion concentrations would be 10^-8/10^-4, which simplifies to 10^-4. This means that the hydronium ion concentration at the pH resulting in the lowest MP activity is 10,000 times higher than that at the pH resulting in the highest MP activity.

The reason for this is that metalloproteins are sensitive to changes in pH, as they rely on specific amino acids residues to bind to metal ions. A change in pH can disrupt these interactions and reduce MP activity. Therefore, maintaining a stable pH is crucial for optimal MP activity.

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Answer:

if it is hydroxide

Explanation:

when metal. and non-metal most the time reacts and the none metal is hydroxide u can easily say it Is base

Answer:

c. iron

Explanation:

iron's atomic number is 26

a. The population in the case of a chemical process being run 15 times and yield being measured each time is the population of yields. The population is conceptual as it is a hypothetical group of yield values that could potentially be observed or measured but cannot be physically touched or grasped.

b. The population in the case of a pollster sampling 1000 registered voters in a certain state and asking them which candidate they support for governor is the population of registered voters in that state. This population is tangible as it consists of actual individuals who can be physically located and contacted.

Sampling is the process of choosing a representative subset of a population for the purpose of generalizing findings about the population. In both of the above cases, sampling is used to infer about the population. Random sampling is the most common method used to select samples that are representative of the population. It is important to note that the accuracy of the sample is largely dependent on the sampling method employed, sample size, and the representativeness of the sample. In practice, a larger sample size provides a more accurate estimate of the population parameters.

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thank youuuuu :)

thank means a great honour of joy and peace have a good day

Addition of soda (Na₂CO₃) to the vitrifying mixture produces glasses with excellent optical properties.

Silica is the common name for the compound silicon dioxide, which consists of one silicon atom and two oxygen atoms. It is an important component of many rocks, sands, and clays, and is also found in many plants and animals. Silica is used in a wide variety of products, from beer and wine to pottery, glass, and paint. It is also used in building materials such as concrete and mortar, and as a food additive. Silica is also used to make silicon-based electronics such as computer chips.

Adding lime (CaCO₃) to the vitrifying mixture creates a jar that can be used to bake or store the liquid medicine.

Addition of alumina (Al₂O₃) to a mixture undergoing vitrification produces a glass that is insoluble in water.

Addition of borax (Na₂B₄O₇) to the mixture during vitrification allows glass to be produced at much lower temperatures.

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a. There are 0.1596 moles of NaCl in 0.3 L of NaCl stock solution.

b. There are 0.1596 moles of NaCl in 2.1 L of NaCl dilute solution.

c. The concentration of NaCl in the final solution is 0.076 M.

Molarity is said to be the number of moles of solute per liter of solution. For example, when salt is dissolved in water, the salt becomes the solute and the water becomes the solution. Since, one mole of sodium chloride weighs 58.44 grams and dissolving 58.44 grams of NaCl in 1 liter of water makes a 1 molar solution, abbreviated as 1M.

c. Let's calculate the concentration of NaCl in the final solution:

M₁V₁ = M₂V₂

M₁ = Initial concentration of NaCl (0.532 M)

V₁ = Initial volume of NaCl (0.3 L)

M₂ = Final concentration of NaCl

V₂ = Initial volume of NaCl (2.0 L)

0.532 × 0.3 = M₂ × 2.1

M₂ = (0.532 × 0.3)/2.1

M₂ = 0.076 M

a. To calculate number of moles in 0.3 L of NaCl stock solution.

Molarity = Mole of solute/Volume of solution

0.532 = Mole of NaCl/0.3

Mole of NaCl = 0.532×0.3

Mole of NaCl = 0.1596 mol

b. To calculate number of moles in 2.1 L of NaCl solution.

0.076 = Mole of NaCl/2.1

Mole of NaCl = 0.076×2.1

Mole of NaCl = 0.1596 mol

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Answer:

C. Dipole

Explanation:

When a molecule is unevenly charged but overall neutral, for example, one atom has a negative charge, and one has a positive charge, they balance each other out when they bond and are known as a polar molecule. Dipole just means 2 poles (positive and negative).