give a formula corresponding to the following name: dibromobis(ethylenediamine)cobalt(iii) sulfate g

The set of quantum numbers that represents the last electron added to an arsenic atom (As) is n=4, l=1, m=2.

An electron is a negatively charged particle that orbits the atomic nucleus in the atom's outermost shell. The electron contains practically no mass but has a charge of -1.

Quantum numbers help to explain and comprehend the structure of electrons. An electron is described by four quantum numbers, which give it a unique identification in a given atom's electronic configuration.

The sets of quantum numbers are: n, l, m, and s. Where n represents the principle quantum number, l is the angular momentum quantum number, m represents the magnetic quantum number, and s is the spin quantum number.

In the case of the last electron added to an arsenic atom (As), the set of quantum numbers that represents it is n=4, l=1, m=2. This is because the last electron added will fill in the outermost shell of the atom.

Therefore, the principle quantum number (n) is equal to 4 because the valence shell is in the fourth shell. l, which is the angular momentum quantum number, is equal to 1 because it is the valence shell's subshell.

Finally, m, the magnetic quantum number, is equal to 2 because of the orientation of the orbital in which the electron is present. As a result, the answer is n=4, l=1, m=2.

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Answer:

b. option Is the correct answer

The Bohr model allows finding the energy range of each series and finding the results for the questions that are:

Bohr's atomic model describes very well the spectrum of Hydrogen in this model, the energy of the levels is

    Eₙ = -13.606  \(\frac{1}{n^2}\)  [eV]

    with n = 1, 2, 3, ...

Where Eₙ is the level energy, n is the whole number, the quantity in brackets is the units of the energy.

A transition occurs when an electron goes from a higher energy level to a lower level,

   ΔE = 13.606  \(( \frac{1}{n_i^2} - \frac{1}{n_f^2} ) \ \ n_i < n_f\))

Depending on the level reached, there are different energy values, from previous empirical studies these levels and their close series  have different names, see table.

Name serie     Final state   Characteristics

  Lyman                    1               Ultra violet

  Balmer                   2              Visible

 Paschen                  3             Infra red

In the most common activities, the observation method is sight, as the human eye can only perceive the visible range of the electromagnetism spectrum, we could not carry out the experiment for the other two series.

The change that must be made is to change the detection means, use a silicon diode that can see radiation from 200 nm to 1100 nm, that is, it is capable of perceiving the Ultraviolet, the visible and the infrared, the output in this case in en form of a voltage amplitude.

In conclusion, using the Bohr model we can find the energy range for each series and find the results for the questions that are:

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On the periodic table, argon has an average atomic weight of 39.948 amu. This number is really near 40. This suggests that Ar-40 is the isotope of argon (Ar) that is most prevalent in the natural world.

If all three argon atoms are neutral, they would each contain 18 protons and 18 electrons. In comparison to one another, the three isotopes will each have a distinct number of neutrons (18, 20, and 22 neutrons respectively).

Atomic number, not atomic mass, is used to categorise the elements. As the atomic number of argon (18) is less than that of potassium (19)

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Answer: d

Explanation:

Aluminum wiring can be a fire hazard because it can oxidize, or combine with oxygen. Therefore, 4moles of aluminium react with 3 moles of oxygen.

Aluminum (Al), also written aluminium, is a chemical element that is a light silvery white metal in Periodic Group 13 (IIIa, or the boron group). Aluminum is the most common nonferrous metal and the most prevalent metallic element in the Earth's crust.

Aluminum is never found in its metallic form in nature due to its chemical activity, but its compounds are found to varying degrees in practically all minerals, flora, and animals.

4Al + 3O\(_2\) \(\rightarrow\) 2Al\(_2\)O\(_3\)

mole of oxygen =3 moles

the mole ratio between aluminium and oxygen is 4:3.

moles of aluminium = 4moles

Therefore, 4moles of aluminium react with 3 moles of oxygen.

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The percentage yield of the benzoic acid is mathematically given as
P= 84.56 %

Question Parameters:

A Grignard synthesis begins with 6.00 g

and ends with 3.94 g benzoic acid.

Generally, if 157 g of bromobenzene produced = 122 g of benzoic acid

Hence,6 g of bromobenzene will produce

X== (122 / 157 ) * 6

X= 4.66 g

Since the experimental yield of benzoic acid = 3.94 g

Therefore the Percentage yield

P = 3.94 / 4.66  * 100

P= 84.56 %

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The number of protons and neutrons together makes the total atomic mass of the element. The atom of chromium has 28 neutrons. Thus, option b is correct.

An atomic mass is the property of an element that defines the number of protons and neutrons of the atom placed in a periodic table. The atomic mass is represented at the lower half of the atomic symbol.

The atomic mass is the sum of the neutrons and the protons that are held together in the nucleus of the atom as a concentrated mass. The atomic number is given as,

Atomic number = number of protons + number of neutrons

Given,

The atomic mass of chromium = 52

Number of protons = 24

Substituting values above:

52 = 24 + number of neutrons

number of neutrons = 52-24

= 28

Therefore, the number of neutrons of a chromium atom is 28.

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Answer: option b, 28

Answer:

No component is perfect. All have tolerances that can vary. If you construct a simple circuit where a 10 volt power supply feeds a 10 ohm resistor, you would expect to measure a current of one ampere. BUT - the wiring has some resistance too. This adds perhaps 0.1 ohms to the circuit. The resistor has a +-5% tolerance. If it is 5% high, it may measure 10.5 ohms. That's a total circuit resistance of 10.6 ohms. The power supply may have a tolerance of +-1%. Suppose it's 1% low. That's an output of 9.9 volts in real life. So you have 9.9 volts dropped across 10.6 ohms. you will measure closer to 0.934 amps instead of 1.000 amps. To make matters worse, most electronic components have a temperature coefficient, that is, their values change with different temperatures. You may get a completely different reading tomorrow if the temperature is different! Finally, with current measurements in particular, you are inserting the ammeter in series with the circuit under test. Ammeters have some inherent resistance too, so by putting the ammeter in the circuit, you are changing the very current you are trying to measure (a little)! Oh yeah, the ammeter has a tolerance too. Its reading may be off a little even if everything else is perfect. Sometimes you have to wonder how we get a decent reading at all. Fortunately the errors are usually fairly small, and not all tolerances are off in the same direction or off the maximum amount. They tend to cancel each other out somewhat. BUT - in rare circumstances everything CAN happen like I said, and the error can be huge.

Explanation:

Explanation:

Question 1

Ans : D

Question 2

Ans: D

hope it helps!

Answer:

1) \(\huge\boxed{\sf D}\)

2) \(\huge\boxed{\sf D}\)

Explanation:

Question 1:

BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaCl (aq)

[------Reactants--------------]     [--------Products---------]

The reactants are in aqueous form as written in the reaction.

Question 2:

This reaction is a synthesis reaction as a new product is formed from reactants that are totally different from each other.

\(\rule[225]{225}{2}\)

Hope this helped!

The option that does not represent a characteristic of a pure substance is:

C) It is made up of different types of particles.

A pure substance is a material that consists of only one type of particle, either atoms of an element or molecules of a compound. It does not contain different types of particles. This is what distinguishes a pure substance from a mixture, which is composed of two or more different substances mixed together.

Option A states that a pure substance has a uniform texture throughout, which means it is homogeneous. This is true because pure substances have a consistent composition and properties throughout.

Option B states that a pure substance has a fixed boiling point or melting point. This is also true because pure substances have well-defined temperature ranges at which they transition between solid, liquid, and gas phases.

Option D states that a pure substance can be an element or a compound. This is true as well because pure substances can exist as either single elements or compounds consisting of two or more elements chemically bonded together.

In summary, the correct option is C, as a pure substance does not consist of different types of particles.

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Answer:

a barrier of concrete, earth, etc, built across a river to create a body of water for a hydroelectric power station, domestic water supply, etc. a reservoir of water created by such a barrier.

a barrier constructed to hold back water and raise its level, forming a reservoir used to generate electricity or as a water supply.

a wall built across a river that stops the river's flow and collects the water, especially to make a reservoir (= an artificial lake) that provides water for an area:

Answer:

Hello!!! Princess Sakura here ^^

Explanation:

The most commonly found element is oxygen.

Answer:

Iron

Explanation:

I took the quiz

Answer:

D. It is supported by adequate data

Explanation:

A theory is a well-substantiated explanation

Hope this helps!

Have a great day. :)

A compound that increases the number of hydroxide ions (OH-) when dissolved in water is called a base.

Bases are substances that have a pH greater than 7 and can neutralize acids to form salts and water. They are characterized by their ability to turn red litmus paper blue, which is a common test used to identify the presence of bases. Examples of common bases include sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2). When a base is dissolved in water, it dissociates to form hydroxide ions and the corresponding cation. Bases play a vital role in many chemical reactions, as in  production of soap,  neutralization of acidic waste streams, and the regulation of pH in biological systems.

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Answer: Both are highly reactive.

Explanation:

A is fluorine, which only needs to gain one more electron to have a full valence shell. Thus, it is reactive.

D is sodium, which only needs to lose one electron to have a full valence shell. Thus, it is also reactive.

4 moles of Fe react with 3 moles of oxygen. Therefore, the mole ratio of iron to iron oxide in this process is 4:2.

The chemical element with the atomic number 8 and symbol O is called oxygen. It belongs to the periodic table's halogen group, is a very reactive nonmetal, and an oxidizing agent that easily produces oxides with most elements as well as other compounds.

The non-metallic element oxygen occurs naturally as a molecule. Two oxygen atoms that are tightly bound together make up each molecule. Oxygen is in a gaseous form at ambient temperature due to its low melting and boiling temperatures.

According to scientists, the oceans produce between 50 and 80 percent of the oxygen used on Earth. Oceanic plankton, which includes floating plants, algae, and certain bacteria that can photosynthesize, is the main source of this production.

Thus, 4 moles of Fe react with 3 moles of oxygen.

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The overall objective of adsorption is to utilize the properties of adsorbents and adsorbates to achieve desired outcomes, such as purification, separation, catalysis, or storage, by exploiting the interactions occurring at the adsorbent-adsorbate interface.

Example of Chemical Adsorption:

Adsorption of hydrogen on a metal catalyst surface during hydrogenation reactions.

Adsorption of gas molecules on the surface of a solid metal oxide catalyst during oxidation reactions.

Adsorption of pollutants on activated carbon in water or air purification systems.

Adsorption of dyes on the surface of a solid support in dye-sensitized solar cells.

Adsorption of toxins or drugs on activated charcoal for detoxification or medical purposes.

Example of Physical Adsorption:

Adsorption of nitrogen gas on the surface of activated carbon in gas storage applications.

Adsorption of water molecules on the surface of silica gel in humidity control systems.

Adsorption of volatile organic compounds (VOCs) on zeolite materials for odor control.

Adsorption of gases on the surface of metal-organic frameworks (MOFs) for gas separation processes.

Adsorption of solutes on the surface of silica particles in liquid chromatography for separation and purification purposes.

The objective of adsorption can vary depending on the application, but some common objectives include:

Removal of pollutants or contaminants from air, water, or other environments.

Separation and purification of specific components from a mixture.

Adsorption of gases for storage or transportation purposes.

Catalytic reactions where adsorbed species react on the surface of a catalyst.

Surface modification or functionalization of materials for specific applications.

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Molar expansion accounts for the changes in the number of moles of a component within a reactor and can have a significant impact on the volume of a plug flow reactor, particularly in cases where the reactor volume is not constant.

(iii) "ei" is commonly used to represent the molar expansion term in chemical reaction engineering equations. It refers to the change in molar flow rate of a particular component i per unit time, per unit volume. The molar expansion term accounts for the variation in the number of moles of a component within a reactor due to chemical reactions or phase changes.

In a plug flow reactor, molar expansion can have different impacts on the reactor volume depending on the specific case. In part (i), where there is a constant volume, the molar expansion does not affect the reactor volume. The molar flow rates of reactants and products may change due to reactions, but the overall volume remains constant.

In part (ii), where the reactor is a semi-batch reactor with a varying volume, the molar expansion can significantly influence the volume of the reactor. As the reaction proceeds, the molar flow rates of reactants and products change, which can lead to changes in the total number of moles and, consequently, impact the reactor volume. The volume may increase or decrease depending on the molar expansion and the specific reaction taking place.

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To find the volume of hydrogen gas, we can use the ideal gas law equation: PV = nRT. Rearranging the equation to solve for V (volume), we have V = (nRT) / P. Given that n = 28.3 moles, R is the ideal gas constant, T is 297 K, and P is 1.08 atm, we can substitute these values to find the volume.

To determine the volume of hydrogen gas produced, we can use the ideal gas law equation, which states:

PV = nRT

Where:

P = pressure (in atm)

V = volume (in liters)

n = moles of gas

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature (in Kelvin)

Given:

n = 28.3 moles

T = 297 K

P = 1.08 atm

Substituting the values into the equation, we can solve for V:

V = (nRT) / P

V = (28.3 moles * 0.0821 L·atm/(mol·K) * 297 K) / 1.08 atm

V ≈ 948 L

Therefore, the volume of hydrogen gas produced is approximately 948 L.

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We can see that the image is the model of the dissociation of a weak acid. The black dots are non ionized acid molecules

A weak acid does not ionize completely because it lacks the ability to donate a proton (H+) to the solvent. In other words, the bond between the proton and the rest of the molecule is not strong enough to break easily. As a result, only a fraction of the weak acid molecules dissociate into ions when dissolved in water, while the remaining molecules remain undissociated.

This is in contrast to strong acids that ionize completely when dissolved in water because they have a stronger bond between the proton and the rest of the molecule, allowing them to easily donate the proton to the solvent.

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Answer:

The answer is wave

Explanation:

Answer:

I guess your answer would be A even thought it is not actually correct it is the closest to being correct.

Explanation:

The molar mass of Al2(SO4)3 is 342.15 g/mol. This means that 1 mole of Al2(SO4)3 has a mass of 342.15 g.To find the mass of sulfur in 2.0 moles of Al2(SO4)3, we first need to determine the number of moles of sulfur in 1 mole of Al2(SO4)3. There are 3 moles of sulfur in 1 mole of Al2(SO4)3, so there are 6 moles of sulfur in 2 moles of Al2(SO4)3.To find the mass of sulfur in 2.0 moles of Al2(SO4)3, we can use the following calculation:Mass of sulfur = (moles of sulfur) x (molar mass of sulfur)

Mass of sulfur = 6 mol x 32.06 g/mol

Mass of sulfur = 192.36 gTherefore, the mass of sulfur in 2.0 moles of Al2(SO4)3 is 192.36 grams.

Answer:

number of protons

Explanation:

The number of protons determines an element's atomic number and is used to distinguish one element from another. 

Answer:

Mass and size are properties not commonly used to identify minerals.

Answer:

it takes 100 gallons longer to boil then it does 1 gallon

Explanation:

brainliest please??

Answer:

According to google, "About five million million hydrogen atoms could fit. Some factors would affect that number like the area of the head and the size of atoms (as well as attractions between atoms). Some atoms are larger than others." Is this accurate? I'm not sure. Good luck! :)

Answer:

beesechurger

Explanation:

To create a scatter plot for this data reactant ,we would plot the number of hours a student studies on the x-axis and their GPA on the y-axis.

Using the given data, we can plot each data point on the scatter plot. The x-coordinate of each point represents the number of hours studied per week, and the y-coordinate represents the corresponding GPA. Once the scatter plot is created, we can estimate the GPA of a student who studies for 15 hours a week by looking at the trend of the data. From the given data, we can see that there is a positive correlation between the number of hours studied and the GPA. This means that as the number of hours studied per week increases, the GPA also tends to increase.

Plot the given data points on a scatter plot with hours studied per week on the x-axis and GPA on the y-axis.
2. Determine a trend line or line of best fit for the plotted data. This line represents the relationship between hours studied and GPA.
3. Locate the point on the trend line that corresponds to 15 hours on the x-axis.
4. Read off the corresponding GPA value on the y-axis.

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