You have 6.0 moles of Hi in a beaker. How many moles of Mg(OH)2 must you add to the beaker tp completely neutralize the Hi based on the following balanced chemical equation?2 HI + Mg(OH)2 --> 2H20 + MgI2a. 1.50 molesb. 3.0 molesc. 6.0 molesd. 12.0 moles

Answer:

¹₀P

Explanation:

 Nuclear reaction:

                ⁹₄Be  + ⁴₂He  → ¹²₆C + ?

To balance this equation, as with other combining specie, the mass number on both sides of the expression must be the same. Also, the atomic number must be the same.

   Let us represent the unknown by X;

          ⁹₄Be  + ⁴₂He  → ¹²₆C + ᵇₐX

 Now;

  Sum of mass number;

            9 + 4 = 12 + b

               13 = 12 + b

                    b = 1

   Sum of atomic number;

             4 + 2  = 6 + a

               a = 0

So the specie is a position ¹₀P

The solubility of mercury(II) iodide (HgI₂) in pure water is determined by its Ksp value, which is 2.9 x 10⁻²⁹.

In a 3.0 M solution of NaI, assuming (HgI₄)₂₋is the only significant species, the solubility of HgI₂can be calculated using the Ksp and K values.

The solubility of HgI2 in pure water can be calculated using its solubility product constant (Ksp). The Ksp value for HgI₂ is given as 2.9 x 10⁻²⁹. Solubility product constant represents the equilibrium constant for the dissolution of a sparingly soluble salt. By solving the equilibrium expression for HgI₂, we can determine its solubility in pure water.

In a 3.0 M solution of NaI, assuming the formation of (HgI₄)₂₋ is the only significant Hg-containing species, the solubility of HgI2 can be calculated using the Ksp and K values. The K value given for(HgI₄)₂₋ - is 6.8 x 10²⁹. By setting up an equilibrium expression considering the dissociation of HgI₂ into (HgI₄)₂₋  ions, we can determine the solubility of HgI₂in the presence of the NaI solution.

These calculations involve using the principles of equilibrium and the relationship between concentrations of dissolved species and their equilibrium constants. Solubility is defined as the maximum amount of solute that can be dissolved in a given solvent under specific conditions. By applying the relevant equilibrium expressions and values, we can determine the solubility of HgI₂ in each situation.

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Answer:

✔ octane

CH3CH2CH2CH2CH2CH2CH2CH3

✔ butane

CH3CH2CH2CH3

✔ methane

CH4

✔ decane

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3

✔ ethane

CH3CH3

Explanation:

An alkane contains only carbon and hydrogen. The following are the accurate names of the compounds;

An alkane is a compound whose only functional group is the carbon - carbon single bond. This compounds contain only carbon and hydrogen.

The correct names of the compounds are;

CH3CH2CH2CH2CH2CH2CH2CH3 - octane

CH3CH2CH2CH3 - butane

CH4 - methane

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3 - decane

CH3CH3 - ethane

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Answer:

Explanation:

In which step of the four-stroke engine cycle does the car release CO₂, H₂O, and CO?

O C. Exhaust

Answer:

Verdadero.

Explanation:

¡Hola!

En este caso, dado que las propiedades periódicas nos hablan de un comportamiento específico sobre los elementos en la tabla periódica, resulta primeramente necesario recordar que la electornegatividad nos dice que tan fuerte es un elemento para atraer electrones de valencia de otros elementos.

De este modo, inferimos que es verdadero, ya que de hecho la electronegatividad nos define el tipo de enlace, basado en la diferencia de electronegatividades de los elementos enlazados, de acuerdo con la imagen adjunta.

Saludos!

(i) The initial reaction rate is \(2*10^{-4} mol litre^{-1} sec^{-1.\)

(ii) The half-life period of the reaction is 1386 seconds.

(iii) The time taken to complete 75% of the reaction is approximately 2772 seconds.

We can use the first-order rate equation:

Rate = k[N2O5]

Where:

Rate is the reaction rate,

k is the rate constant,

[N2O5] is the concentration of N2O5.

Given:

Rate constant (k) = \(5*10^{-4} sec^{-1}\)

Initial concentration of N2O5 =\(0.4 mol litre^{-1}\)

(i) To find the initial reaction rate:

Substitute the given values into the rate equation:

Rate = k[N2O5]

Rate = \((5*10^{-4} sec^{-1})(0.4 mol litre^{-1})\)

Rate = \(2*10^{-4} mol litre^{-1} sec^{-1}\)

The initial reaction rate is \(2*10^{-4} mol litre^{-1} sec^{-1}\).

(ii) To find the half-life period:

The half-life of a first-order reaction is given by the equation:

t(1/2) = (0.693 / k)

Substitute the given value of k into the equation:

t(1/2) = \((0.693 / 5*10^{-4} sec^{-1})\)

t(1/2) = 1386 sec

The half-life period of this reaction is 1386 seconds.

(iii) To find the time taken to complete 75% of the reaction:

The time required to complete a certain percentage of a reaction can be found using the equation:

t = (ln(1 / (1 - x)) / k)

Where x is the fraction of the reaction completed (in this case, 75%).

Substitute the given values into the equation:

t =\((ln(1 / (1 - 0.75)) / 5*10^{-4} sec^{-1})\)

t = 2772 sec

The time taken to complete 75% of the reaction is approximately 2772 seconds.

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Answer:

H 2 O

Explanation:

H 2 O can act as a Brønsted-Lowry acid by donating a proton to produce its conjugate base OH - (known as the hydroxide ion). H 2 O can act as a Brønsted-Lowry base by accepting a proton to produce its conjugate acid H 3 O + (known as the oxidanium ion, or oxonium ion, or, in older textbooks as the hydronium ion (5)).

Answer:

The Aufbau Principle

Explanation:

In the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy level before occupying higher-energy levels.

Answer:

Aufbau principle

Explanation:

edge 2021

Answer:

Molality of glucose is 7×10⁻¹⁰ mol/Kg

Explanation:

\(Molality = \frac{Moles of solute}{Kg of Solvent}\)

you need to do 2 things before use this formula:

1. Transform 6.36 g of glucose into moles

2. Transform 500 mL of water into grams

1. To transform 6.36 g of glucose into moles, we need to know the molar mass of glucose. The molecular formula of glucose is C₆H₁₂O₆

Molar Mass of:

O = 16

H = 1

C = 12

So, to calculate the molar mass of glucose:

(6x12)+(12x1)+(16x6) = 72 + 12 + 96 = 180 g/mol

Now:

6.36 g of glucose --- x moles

180 g of glucose --- 1 mol

x = 6.36/180

x = 0.035 moles

2. First, transform 500 mL into L = 0.5 liters.

To transform 500 mL of water into grams we need to know the density of the water. It is 997 Kg/m³.

liters to m³:

1 liter --- 0.001 m³

0.5 --- x

x = 5×10⁻⁴ m³

997 Kg --- 1 m³

5×10⁻⁴ --- x

x = 5×10⁻⁷ Kg

Now: 0.035 moles/5×10⁻⁷ Kg =

Molality of glucose is 7×10⁻¹⁰ mol/Kg

Answer:  

In this case the mass number would be 11.

Explanation:

The mass number of an element is the sum of the protons and neutrons. The number of neutrons for a given element is the only number that can change and still have the identity of the element stay the same, (because the atomic number is the number of protons).

The difference in time required for cold brew coffee compared to hot brew coffee is primarily influenced by the solubility of coffee compounds and physical property of Temperature.

Cold brew coffee takes longer because it relies on a slower extraction process due to the lower temperature. Hot water has higher thermal energy, which increases the kinetic energy of coffee compounds, facilitating their dissolution and extraction. The higher temperature promotes the breakdown of coffee solids, oils, and flavor compounds, leading to a faster extraction process. This is why hot brew methods, such as pour-over or espresso, produce coffee relatively quickly.

On the other hand, cold brew coffee is prepared by steeping coarsely ground coffee in cold or room temperature water for an extended period, typically ranging from 12 to 24 hours. The lower temperature reduces the solubility and kinetic energy of coffee compounds, resulting in a slower extraction process. The gradual extraction over time allows for a smoother, less acidic flavor profile and a different chemical composition compared to hot brew methods.

The physical property of temperature and its impact on solubility and kinetic energy play a crucial role in the difference in time required for cold brew and hot brew coffee. While hot water facilitates faster extraction, cold water necessitates a longer steeping time to achieve adequate flavor extraction and development.

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Answer:

Oxygen

Explanation:

Given the following question:

The following atom has 7 protons (plus charge)
The following atom has 8 neutrons (negative charge)
The following atom has 7 electrons since the number of electrons are equal to the number of protons the atom has.

The following atom is oxygen with a mass number of 16: (see photo below)
Let the red represent protons...
Let the gray represent the neutrons...
Let the blue represent the electrons...

Hope this helps.

The equation for lactic fermentation after glycolysis is:

           pyruvic acid + NADH → lactic acid + NAD⁺

Skeletal muscles are where lactic acid fermentation takes place. When there is not enough oxygen, lactate dehydrogenase converts pyruvate to lactic acid. Lactic acid accumulation in the muscles causes fatigue. Muscle cells and other bacterial and animal cells engage in a type of anaerobic fermentation.

The metabolic process known as lactic acid fermentation turns glucose or other six-carbon sugars into the metabolite lactate, which is the lactic acid in solution, and cellular energy.

The creation of many food products involves the bacterial process known as lactic fermentation. It serves a critical function in food safety by giving the finished products distinctive scents and textures.

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The new volume of the balloon will be determined by the Ideal Gas Law.

The Ideal Gas Law is a mathematical equation used to describe the behavior of an ideal gas under a given set of conditions. It states that, at a constant temperature and pressure, the pressure, volume and amount of gas present are all directly proportional.

This law states that the product of the pressure, volume, and temperature of a gas is a constant.
Since the pressure of the balloon remains constant, the new volume is inversely proportional to the temperature.
Therefore, the new volume can be calculated by dividing the original volume (13.5 liters) by the ratio of the original temperature (248 K) to the new temperature (324 K),
which is 248/324 = 0.76.
The new volume of the balloon is then 13.5 liters / 0.76 = 17.76 liters.

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The ionization of HOCl (hypochlorous acid) in solution is dependent on the concentration of H+ ions. Therefore, a salt that could decrease the concentration of H+ ions in solution would also decrease the ionization of HOCl.

Option (D) NaOH is a strong base that could neutralize H+ ions and hence decrease their concentration in solution. Therefore, adding NaOH to a solution of HOCl would decrease the ionization of HOCl in solution.

Option (A) NaCl, option (B) NaOCl, option (C) Na2O, and option (E) BaCl2 do not directly affect the concentration of H+ ions in solution, and hence would not have a significant effect on the ionization of HOCl.

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Answer:

Density, \(d=2.09\ g/cm^3\)

Explanation:

Given that,

Mass of a flask is 450 g

Volume of benzene added to the flask is 145 mL or 145 cm³

The weight of the flask and benzene is found to be 754 g.

We need to find the density of the benzene.

Weight of benzene added = total weight of flask and benzene-mass of flask

m = 754 g - 450 g

m = 304 g

Density = mass/volume

So,

\(d=\dfrac{304\ g}{145\ cm^3}\\\\d=2.09\ g/cm^3\)

So, the density of the benzene is \(2.09\ g/cm^3\).

The heat change of the system is -23.61 kJ. The negative sign indicates that the system lost heat to the surroundings.

The first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:
ΔU = Q - W



We are given that the system expands from 3.00 L to 9.00 L against an external pressure of 1.00 atm, performing 610 J of work and decreasing its internal energy by 23 kJ. We can use the equation for the work done by a gas during expansion:W = -PΔV
where P is the external pressure and ΔV is the change in volume of the gas. Since the gas is expanding, ΔV is positive, so W will be negative. We can rearrange this equation to solve for ΔV:
ΔV = -W/P



So the change in volume is -6.02 L, which means the initial volume was 3.00 L and the final volume was 9.00 L. We also know that the internal energy decreased by 23 kJ, so:
ΔU = -23 kJ
ΔU = Q - W

-23 kJ = Q - (-610 J)
-23 kJ = Q + 610 J
Q = -23 kJ - 610 J
Q = -23.61 kJ

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Answer:

d) atmosphere pressure

Answer:

B.) weather

Explanation:

weather is constantly changing everyday and each day presents a new condition:)

It takes 1 mol of sulfur to produce 1 mol of sulfur dioxide. Therefore, 64 g of sulfur is required to produce 64 g of sulfur dioxide.

To calculate the mass of sulfur required to produce 64 g of sulfur dioxide, the following equation can be used:

m (sulfur) = (64 g SO2) / (32 g/mol SO2) × (1 mol S/ 32 g S) = 2 mol S

Therefore, the mass of sulfur required to produce 64 g of sulfur dioxide is 2 mol S or 64 g.

The mass of sulfur that must be burned to produce 64 g of sulfur dioxide is 64 g. This is because the molar mass of sulfur dioxide is 32 g/mol and the molar mass of sulfur is 32 g/mol.

Therefore, it takes 1 mol of sulfur to produce 1 mol of sulfur dioxide. Therefore, 64 g of sulfur is required to produce 64 g of sulfur dioxide.

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Answer:

No. 1, No. 2, No. 6

First of all there's water on the moon, only half of the earth is also exposed to the sun, i don't think the distance from Earth does anything.

Photosynthesis is impossible on the surface of the moon because the moons atmosphere lacks oxygen, their is not enough carbon dioxide in the moons atmosphere and the soil on the moon cannot support plants life. Thus option 1, 2 and 6 is correct.

Photosynthesis is defined as the process used by the plants, algae and some bacteria to turn sunlight, carbon dioxide and water into food, sugar and oxygen.

It occurs solely in the plants that have green pigment chlorophyll which is used to prepare food for itself.

Thus, photosynthesis is impossible on the surface of the moon because the moons atmosphere lacks oxygen, their is not enough carbon dioxide in the moons atmosphere and the soil on the moon cannot support plants life. Thus option 1, 2 and 6 is correct.

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It is possible to extract 100% of a compound from a solution under certain conditions, but it can be difficult to achieve in practice.

The ability to extract a compound from a solution depends on several factors, including the solubility of the compound in the solvent, the concentration of the compound in the solution, the nature of the extraction process, and the purity requirements of the final product.

In some cases, the solubility of the compound in the solvent may be very low, making it possible to extract nearly all of the compound from the solution through repeated extractions or purification steps. However, in other cases, the solubility of the compound in the solvent may be high, making it difficult to achieve complete extraction.

Additionally, other factors such as losses during the extraction process, losses during subsequent purification steps, and the presence of impurities or other compounds in the solution can also affect the yield of the final product. Therefore, achieving 100% extraction of a compound from a solution is challenging and requires careful optimization of the extraction and purification conditions.

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The percentage of copper that would be calculated would be 0.002 g lower than it should have been. This error would not change the empirical formula reported, as the error is a result of an incorrect mass measurement and not incorrect chemical formula or other factors of the empirical formula.

The definition of an empirical formula for a compound is one that displays the ratio of the elements present in the compound but not the precise number of atoms in the molecule. Subscripts are used next to the element symbols to indicate the ratios. The subscripts in the empirical formula, which represent the ratio of the elements, are the smallest whole numbers, making it also known as the simplest formula.

1) Start by listing the gram of each element, which you often find in an experiment or are required to provide in a question.

2)To make the computation easier, assume the entire mass of a sample is 100 gram, so you can work with simple percentages. Set the mass of each element to the percent, in other words. The total should be 100 percent.

3) You may convert the mass of each element in the periodic table into moles by multiplying its atomic weight by its molar mass.

4)Multiply each mole value by the few moles you determined through computation.

5) To the nearest whole number, round each number you receive.

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The signal appears in 2 ppm if a ch3 proton is detected using nmr spectroscopy at 1.2 kHz in a 600 mhz instrument.

The study of matter's physical, chemical, and biological properties is done using NMR spectroscopy. It is used by chemists to ascertain the identity and structure of molecules.

When an external magnetic field is provided, energy can be transferred from lower energy levels to higher energy levels.

Energy is transferred at a wavelength that matches the radio frequency. Additionally, when the spin returns to its initial base level, energy is released at the same frequency.

NMR spectrometers come in two different flavors: continuous-wave (cw) and pulsed or Fourier-Transform (FT-NMR).

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Copper(ii)nitrate reacts with sodium bromide to form Sodium nitrate and cupric bromide, but no precipitate is formed.

The reaction between Copper nitrate and sodium bromide is as follows.

   Cu(NO₃)₂ + NaBr  →  CuBr₂ + NaNO₃

Copper nitrate and sodium bromide react to form Cupric bromide and Sodium Nitrate. The products Cupric bromide and sodium sulfate are soluble in water. As a result, no precipitate is formed as a result of this reaction.

The reaction between copper nitrate and sodium bromide is an example of a double displacement reaction, which means the anions and cations of two ionic compounds interact and displace each other.  Precipitation formation only happens when insoluble products are obtained.

Here both the products are soluble in water, So no precipitate is formed during the reaction.

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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:

A palavra 'composto' também vem do latim, e significa literalmente 'compor' alguma coisa. Então esta é a composição que podes ver no frasco à direita. O composto é uma composição de todos os tipos de substâncias orgânicas que se decompõem com o tempo e se tornam húmus. O húmus é uma unidade homogênea.

Explanation:

Answer:

below...

Explanation:

The main difference between Compost and Humus is that the Compost is a organic matter that has been decomposed and recycled as a fertilizer and soil amendment and Humus is a any organic matter that has reached a point of stability.

Answer:

Fluorine has seven electrons in 2p-subshell whereas chlorine has seven electrons in its 3p-subshell. 3p-subshell is relatively larger than 2p-subshell. Therefore, repulsion among the electrons will be more in the 2p-shell of fluorine than 3p-subshell in chlorine.  Due to the smaller size and thus, the greater electron-electron repulsions, fluorine will not accept an incoming electron with the same as chlorine.

Answer:

Hope it'll clear your doubt

Explanation:

example

like in Po4³- one coordinate bond formation occurs coz Phosphorus has valency of 3 and can form 3 bonds when extra electrons on Oxygen atom forms bonds with Phosphorus....those 3 bonds are covalent but.....phosphorus has 5 valence electrons in valence shell so it has already formed 3 bond with Oxygen atoms....now remaining two electrons of P forms coordinate bond with Oxygen

Answer:

Denaturation is what happens when heat is applied to the eggs. ... The heat coming from your stove denatures the protein by disrupting some of its bonds that held the molecule into shape. In the case of hard-boiled eggs, the proteins clump together and solidify, causing the egg white and yolk to harden.

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Because 1 mole of any gas occupies the same volume as 1 mole of any other gas at the same temperature and pressure, the statement is untrue.

Equal volumes of gases at the same temperature and pressure contain the same number of molecules, according to Avogadro's law.

Helium has a molar mass of 4 grams per mole, whereas oxygen has a molar mass of 32 grams per mole. Therefore, 1 mole of helium weighs 4 grams, compared to 32 grams for 1 mole of oxygen. Avogadro's law states that the volume of a mole of oxygen is equal to the volume of a mole of helium.

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