1. ni2 (nhbr, ph,o where m, n, and p represent the coefficients in the formula. an analysis of the salt can be obtained if a sample is dissolved by an acid-base reaction in excess acid and then the excess is titrated with naoh. that is, excess hci oh-h20 a 0.185-g sample of the nickel salt was dissolved in 30.00 ml of 0.1013 n hci. the excess hcl required 6.30 ml of 0.1262 n naoh to reach the end point. calculate the weight of the salt that contains one mole of nh3 (that is the equivalent weight of the salt) 2. propose a molecular formula for the salt in 3ni2(nh)mbrn ph20 that is consistent with this experimental equivalent weight.

Citric acid with a pH of 7 can be prepared from the following reagents.

The preparation of 500 ml of pH 7 citric acid requires a combination of the following reagents: 1.8 m citric acid, 1.2 m sodium dihydrogen citrate, 1.5 m sodium hydrogen citrate, 0.8 m sodium citrate, 0.1 m HCl, and 0.1 m NaOH.

Begin by dissolving the citric acid in 500 ml of distilled water. Gradually add the sodium dihydrogen citrate and sodium hydrogen citrate, stirring continuously until the solution is homogenous.

Then, add the sodium citrate while stirring until the solution is homogenous. Finally, adjust the pH to 7 using 0.1 m HCl and 0.1 m NaOH while stirring until the desired pH is achieved.

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The volume of Iron (II) bromide solution is 2.13 x [tex]10^{2}[/tex] ml.

A milliliter is a smaller metric unit that represents the volume or the capacity of a liquid. It is used to measure a smaller quantity of liquid and is equal to a thousandth of a liter. It is denoted with an abbreviation ml or mL.

Liters and milliliters are metric units of volume which are used to measure the capacity of a liquid. The capacity of a liquid can be measured in milliliters, centiliters, liters and kiloliters. Though all these units represent the same quantity, their values differ. In this page, we will find the relation between liters and milliliters and the conversion between these units.

Volume is a three-dimensional quantity that is used to measure the capacity of a solid shape. It means the amount of three-dimensional space a closed figure can occupy is measured by its volume.

Given,

Concentration of iron(II) bromide = 1.29 mo/L

Moles of iron(II) bromide = 275 mmol = 0.275 mol

conversion used : 1 mmol = 0.001 mol

Volume of iron (II) bromide = Concentration of iron (II) bromide

Volume of iron (II) bromide = 0.275/1.29 = 2.13 L = 2.13 x 10² ml

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[ OH−] of a solution that is 0.300 M in HCO3− is 3.24×10^-8 Molarity. and the oh of the solution is 7 .49

Part A: We know that HCO3- is a weak base, so it can be converted to H2CO3 (carbonic acid) through the following equilibrium:

HCO3- + H2O <=> H2CO3 + OH-

The Ka1 for H2CO3 is 4.3×10^-7, so we can use the following expression to find the [OH-]:

[H2CO3][OH-] = Ka1 * [HCO3-]

[OH-] = Ka1 * [HCO3-] / [H2CO3]

Since [H2CO3] is equal to [HCO3-], we can simplify this to: [OH-] = Ka1 * [HCO3-]^2

[OH-] = (4.3×10^-7) * (0.300)^2[OH-] = Ka1 * [HCO3-]^2 [OH-] = (4.3×10^-7) * (0.300)^2

[OH-] = 3.24×10^-8 M. So the [OH-] of the solution is 3.24×10^-8 Molarity.

Part B: To find the pH of the solution, we need to find the negative log of the [OH-].

pH = -log([OH-])

pH = -log(3.24×10^-8)

pH = 7.49

So the pH of the solution is 7.49.

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The factors that govern the position of an IR peak are: strength of the bond ; masses of the atoms involved in the bond and type of vibration being observed.

The study of chemicals makes use of infrared spectroscopy.

The electromagnetic spectrum includes infrared radiation. It has a significant role to play in compound analysis. Infrared spectroscopy is frequently used in organic chemistry to pinpoint a molecule's interactions.

An IR peak's location is affected by a number of variables, including:

the bond's strength, the atoms' weights, and the type of vibrations being noticed

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Phenomenon: This is a natural event that occurs in the atmosphere and is beyond human control, causing devastation to the environment, animals, and humans, and occasionally resulting in death.

Phenomenon is an observable occurrence which is not fully explained by any accepted scientific theory. It is usually seen as an unexpected or unusual event that has no apparent explanation. Phenomenon can range from the unusual and unexplained, to the commonplace and expected.

Flood: This is a result of heavy rain caused by typhoon mostly happened during rainy session.
Wave: Disturbances are spread from one location to another in a predictable and well organized manner. It is really loved by the suffers by it hates by the fishermen.

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At a temperature of 23 °C and a pressure of 0.788 atm, a gas has a density of 1.42 g/l and a molar mass of 44.04 g/mol.

The mass in grams of one mole of a substance is its molar mass. The molar mass of a substance can be found by adding the molar masses of its constituent atoms, as demonstrated in this video. The computed molar mass can then be used to convert between mass and the quantity of moles in the substance.

The mass of 6.022 10 23 atoms, molecules, or formula units make up one mole of a substance, which is known as the molar mass. This value is given in grams per mole.

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A pure substance should ideally show up as a network of big crystals after recrystallization. If not, it might be beneficial to reheat the flask and let the contents cool more gradually.

Recrystallization is the process through which crystal structure's grain grains adopt a new structure or new crystal form. Recrystallization is a process that is difficult to define precisely because it is closely related to a number of other processes, most notably recovery and grain growth. As soon as boiling is observed during recrystallization, solvent should be added to the mixture. More solvent should be added as soon as boiling starts up again. The solution is homogenized by repeating this process.

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H2(g)+2ICl(g) → 2HCl(g)+I2(g)H2(g)+2ICl(g)→2HCl(g)+I2(g). The most likely explanation for the disparity between step 1 and 2 rates is either of the following.

A white precipitate is produced as nothing more than an outcome of a reaction which the bonds between it proteins of the reactant and product are shattered and new bonds. A chemical equation essentially explains how reactants lead to products using mathematics.

They are phrases that use chemical symbols and formulae to represent catalysis. The reactants are depicted on left in a simple reaction, while the products are shown on the right.

Rate of reaction is equal to the quantity of reactant utilized divided by the time it takes for the reactant to be consumed.

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The complete question is-

Step 1:H2(g)+ICl(g)→HI(g)+HCl(g)(slow)Step 2:HI(g)+ICl(g)→HCl(g)+I2(g)(fast)The reaction is carried out at constant temperature inside a rigid container. Based on this mechanism, which of the following is the most likely reason for the different rates of step 1 and step 2 ?

We may determine the amount of atoms or molecules contained in every food item using the mole concept and avogadro's law. Number of molecules or atoms: 0.668 x 1023

The smallest unit of any substance that is made up of one or more elements and has the ability to live on its own while keeping all of the substance's physical and chemical properties is called a molecule. Within molecules, more atom division takes place. For instance, the atom and molecule of oxygen are represented by the letters O and O2, respectively.

Single, neutral particles make up an atom. As neutral objects consisting of two or more atoms joined together, molecules are. A positively or negatively charged particle is called an ion.

Molar mass = [(12 X 6) + (1 X 12) + (6 X16)] g/mol

= 72 + 12 + 96 = 180 g/mol

Thus molar mass of glucose (C6H12O6) = 180 g/mol

Number of mole = 20/180 = 0.111 moles

So, 0.111 moles of glucose will contain ( 0.111 X 6.023 X 1023) number of molecules or atoms

                            = 0.668 X 1023 number of molecules or atoms

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The sum of oxidation numbers of the three Si atoms in k-feldspars (KAlSi3O8) is +12

The amount of electrons any atom or ion however has gained or lost in comparison to a neutral atom is known as the oxidation number / state of the atom or ion.

k-feldspars, molecular formulae KAlSi3O8

We know that -

Oxidation state of oxygen = -2

Oxidation state of Potassium = +1

Oxidation state of aluminum = +3

8 oxygens, each of them -2, = -16

1 potassium, +1

1 aluminum, +3

1 + 3 - 16 = -12

So the three silicon atoms need to make up +12 for the compound to be neutral.

12 / 3 = +4, so each silicon is +4.

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Isolating variables are commonly used when solving equations related to chemical reactions or thermodynamics.

For example, let's say we have the equation for the equilibrium constant of a reaction:

Kc = [C][D] / [A][B]

Where Kc is the equilibrium constant, [C] and [D] are the concentrations of products C and D, and [A] and [B] are the concentrations of reactants A and B.

If we want to isolate the concentration of one of the reactants, say [A], we can use the opposite operation to move it to one side of the equation.

For example, we can multiply both sides of the equation by the denominator, [A][B], to cancel out the denominator on the right side:

Kc * [A][B] = [C][D]

Then we can divide both sides by [C][D]:

[A] = Kc * [B] / [D]

Now [A] is isolated on one side of the equation and can be calculated.

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In chemistry, bond strength is the force that a chemical bond uses to hold two atoms together. This is typically stated in terms of the kilocalories per mole of energy needed to break the bond.

The more electron pairs there are in a bond between two atoms, the stronger the link becomes.

The bond length typically reduces as the binding strength rises. This leads us to the conclusion that triple bonds are both stronger and shorter than double bonds between the same two atoms, and that double bonds are both stronger and shorter than single bonds between the same two atoms.

The complete question and answer are attached as images.

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You toss in some zinc and add additional acid than usual. The volume of hydrochloric acid used won't affect the rate of the reaction.

a substance that reacts with certain metals to produce salts and releases hydrogen into water. Acids give certain dyes a reddish tint and have a sour flavor. Gastric acid is one of the body's natural acids, and it can aid in the proper function of organs. Hydrogen peroxide is a kind of acid.

Organic molecules, fatty acid metabolism, sodium ascorbate, and hydrochloric seem to be the acids that are most crucial to a female organism. The first is called binary acid, followed by oxyacid and carboxylic acid. Binary acids are represented by the letter "H-A," which stands for an ester linkages to a non - metals atom.

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S = √[Ksp/(2)^2]: The mathematical expression for calculating S is derived from the equilibrium expression for the reaction: [Ag+]2[CO3²⁻] = Ksp.

Equilibrium is a state of balance where opposing forces are equal and in balance with each other, resulting in no net change. It occurs when an object's total internal and external forces cancel each other out. Equilibrium is a critical conecpt in physics, economics, and other sciences. In physics, equilibrium can refer to either static or dynamic balance, depending on the context. Static equilibrium describes when an object does not move or change, while dynamic equilibrium describes when an object's velocity and acceleration is constant. In economics, equilibrium is the balance of supply and demand in a market. In this context, equilibrium is the point at which the amount of goods supplied is equal to the amount of goods demanded.

The expression for S is derived from rearranging the equation to solve for [Ag+], then taking the square root of the result. The "2" in the denominator represents the stoichiometric coefficient of Ag+ in the equilibrium expression.

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Although the kinetic energy average rises with temperature, there won't be many overt changes in volume or form.

Which energy do you understand by kinetic?

Describe kinetic energy. A particle or an item that is in motion has a sort of energy called kinetic energy. An item accumulates kinetic energy when work, which involves the transfer of energy, is performed on it by exerting a net force.

The kinetic energy is absent?

An item in motion has energy, which is called kinetic energy. Kinetic energy can be found in the motion of molecules in space, you walking down a street, and the earth rotating around the sun. The relationship between kinetic energy and an object's mass and square of its speed is direct: K.E. = 1/2 m v2.

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colorless liquid, clear solution, microcrystalline solid, white solid in statement above is quantitative data. The mass and volume both include significant numbers of 3 and 2, respectively.

A tasteless and colorless liquid, pure water has neither. We can conclude that the provided liquid is pure water if it boils at 100 °C (373 K) and freezes at 0 °C (273 K) both at 1 atmosphere pressure.

Water, often called as the universal solvent, is a flavorless and odorless chemical that is necessary for all known forms of life. Small concentrations are colorless to the unaided eye. On Earth, it covers around 70% of the surface.

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Spectral lines act like fingerprints that identify atoms and molecules.

Spectral lines are unique patterns of light emitted or absorbed by an atom or molecule at specific wavelengths or frequencies. These patterns are caused by the transitions of electrons within an atom or molecule, and are specific to each element or compound.

There are different types of spectroscopy used to study spectral lines, each one specific to a range of frequencies:

-In the visible region of the electromagnetic spectrum, we have the absorption or emission spectra.

-In the infrared region of the electromagnetic spectrum, we have the infrared spectra.

-In the ultraviolet and visible region of the electromagnetic spectrum, we have the ultraviolet-visible spectra.

-In the X-ray region of the electromagnetic spectrum, we have the X-ray spectra.

Each type of spectroscopy provides a unique set of information about the sample being studied, and can be used to identify and quantify specific elements or compounds.

Spectral lines are extremely specific and unique, like fingerprints, and can be used to identify and distinguish one atom or molecule from another.

A gas with a volume of 4.00l at a pressure of 205 kpa is allowed to expand to a volume of 12.0 l. The pressure of the container is 68.3 kpa.

The Boyles law is given as :

P1 V1 = P2 V2

The Pressure P1 = 205 kpa

The Volume V1 = 4 L

The Pressure P2 = ?

The Volume V2 = 12 L

By using the above formula , we get

P1 V1 = P2 V2

205 × 4 = P2 × 12

P2 = 820 / 12

P2 = 68.3 kpa.

Thus, the pressure of the container is 68.3 kpa.

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Condensed milk is more viscous than evaporated milk. This is because condensed milk has had the majority of its water content removed through evaporation, leaving a thicker, sweeter substance.

It is not appropriate to liken evaporated milk or condensed milk to a type of magma as Magma is molten rock that can be found under the Earth's surface while evaporated milk and condensed milk are dairy products. They do not have any relation with magma.

A molten rock, also known as magma when it is underground and lava when it erupts and flows on the surface, is a mixture of liquid rock, dissolved gases, and solid mineral crystals. It is formed deep within the Earth's crust and can be composed of a variety of elements such as silicon, oxygen, aluminum, and iron.

When it is erupted, the pressure and temperature decrease, causing the dissolved gases to escape and the solid mineral crystals to form, creating the solid rock we see on the surface.

Therefore, the correct answer is as given above

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Both oxygen and sulfur will bond with the fewest number of hydrogen atoms (2); carbon will bond with the most (4).

The molecular configuration of a molecule is the permanent geometry that results from the spatial arrangement of its bonds.

The number of hydrogen required to attain the stable molecular configuration would result in 8 electrons in the outer p shell as carbon, nitrogen, oxygen sulfur,

The stability of atoms depends on whether or not their outer-most shell is filled with electrons. If the outer shell is filled, the atom is stable.

Atoms with unfilled outer shells are unstable, and will usually form chemical bonds with other atoms to achieve stability.

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In a chemical equation, the formula of a substance in water solution is followed by the symbol. This statement is true.

The subscript (aq) following a molecule in a chemical equation indicates that it is aqueous. Aqueous solutions are those in which the solvent is water. Chemical reactions may be represented quickly using symbol equations. They demonstrate which atoms are involved and how they are linked together. Symbol equations are always in the form of reactants products. A + symbol denotes the separation of two or more reactants or products.

A response arrow simply indicates that something has changed and that one item has become another. The arrow leads from the old object (what responded) to the new thing (the thing that formed). An “equation of reaction” employs the reaction arrow.

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The total number of protons are 6 and the total number of neutrons are 7 in an atom of the naturally occurring carbon isotope with the largest mass number.

Isotopes of almost all elements save hydrogen get their names from the mass number of their nuclei. Carbon atoms, for instance, have a mass number of 12 since the sum of their six protons and six neutrons equal 12. As a result, these atoms are referred to as carbon-12. The atomic mass of carbon atoms with seven neutrons is 13, which is equal to six protons plus seven neutrons. The isotope known as carbon-13 can be found in these atoms.

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The temperature at which it volume doubled at the same pressure​ is 600 kelvin.

Given that,

initial volume (V₁) = 150 cm³

final volume (V₂) = 300 cm³

initial temperature (T₁) = 27⁰C

                    = (273 + 27) K = 300 K

final temperature (T₂) = ?

As we know from Charles's law:

V₁/T₁ = V₂/T₂

or, 150 / 300 = 300 / T₂

or, T₂ = 600 K

The ideal gas volume at constant pressure is exactly proportional to its absolute temperature, as stated by Charles' law. According to Charles' law, the temperature in degrees Kelvin is directly proportional to volume if the pressure on a dry gas sample remains constant.

Charles Law is used in everyday life in ways like hot air balloons in the sky. The flame heats the air inside the balloon, accelerating and dispersing the air molecules.

The balloon can simply float because the air inside is less dense than the air outside.

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Making a 5 M solution Put 292 g of NaCl in 800 mL of water to dissolve it. H2O is used to adjust the volume to 1 L. dispense into aliquots, then autoclave to sanitize. The NaCl solution should be kept at room temperature.

To make a 5% saline solution, how many grams of NaCl are required?

Answer and justification NaCl is the solute and water is the solvent in a saline solution. In order to create 1 L of a 5% (w/v) saline solution, 50 g of NaCl are required.

How is a 5 mm solution made?

Thus, 1 liter of 5 mM NaCl is equal to 5 ml of 1 mM NaCl plus 995 ml of water. You won't need to be concerned about things like moles if you use this method. You merely need to know how to.

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Answer:

1.0 L

Explanation:

A gallon of water has a mass of 37.85 hectograms, which is equal to 3785 grams.

Matter can be broken down into two categories: pure substances and mixtures.

We are surrounded by matter, which is anything that takes up space and has mass. As matter, solids and liquids are more visible. The three states of matter most frequently encountered on earth are solids, liquids, and gases. A solid has a distinct shape and is unyielding. A liquid flows and conforms to a container, but when gravity acts on it, it creates a flat or slightly curved upper surface. A gas adopts the volume and shape of its container.

Elements and compounds are formed through the further division of pure substances. Physically coupled structures known as mixtures can be disassembled into their component parts.

A pure material is something that exclusively comprises one type of matter, according to the definition. Any sample of this substance that you examine must have exactly the same item, with a fixed, specific set of qualities. This might either be one single element or one single compound. Because there is no atom-to-atom connection between the atoms of the constituent substances in a mixture, mixtures may always be split back into their individual pure components.

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Option B of the following has the same number of significant figures as the number 1.00310

The number 1.00310 has five significant figures. A significant figure is any digit that can be known with certainty, and it includes all digits except leading zeroes in a number. Out of the options, B. 1×106 also has five significant figures. This is because a number written in scientific notation is considered to have as many significant figures as the coefficient has. The coefficient 1 has 1 significant figure and it is the same as the number 1.00310 which has five significant figures.The other options:

A. 8.66 has three significant figures

C. 199.791 has five significant figures

D. 5.119 has four significant figures

E. 100 has three significant figures.

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A statement best describes the entropy that occurs when two gases are added to the same container: The gases will disperse and mix due to the increase in entropy for both gases.

Entropy is a thermodynamic quantity which measures the energy in a system per unit temperature that cannot be used to do work. Perhaps the most common manifestation of entropy is (following the law of thermodynamics), the entropy of a closed system always increases and under conditions of heat transfer, heat energy moves from the component with a higher temperature to the component with a lower temperature. In a system where the heat is isolated, the entropy only goes in one direction (not a reversible process). It is necessary to measure the entropy of a system to determine that energy cannot be used to do work on thermodynamic processes.

These processes can only be carried out by energy that has been transformed, and when energy is converted into work, it theoretically has a certain maximum efficiency. During the work/effort, entropy will accumulate in the system, which then is dissipated in the form of wasted heat.

In classical thermodynamics, the concept of entropy is defined in the second law of thermodynamics, which states that the entropy of an isolated system always increases or remains constant. Thus, entropy can also be a measure of the tendency of a process, whether the process tends to be "entropy" or will proceed in a certain direction. Entropy also shows that heat energy always flows spontaneously from an area with a higher temperature to an area with a lower temperature.

Thermodynamic entropy has the dimensional energy divided temperature, which has International Units joules per kelvin (J/K).

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Moles of atoms in a pure gold ring (24k) that has a mass of 6.62 g is 0.0336 moles.

The mole is the unit of amount of substance in the International System of Units. The quantity amount of substance is measure of how many elementary entities of a given substance are in a sample. The mole is defined as having exactly 6.02214076×10²³ elementary entities. The number 6.022 × 10²³ is Avogadro's number or Avogadro's constant.

In the given problem, it is given mass of 6.62 g

atomic mass of gold = 197

So, moles of atoms= 6.62/197

= 0.0336 moles.

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