HELPPP MEE PLEASE THIS DUE TODAY

Answer:

Beryllium because on the periodic table the metal reactivity is decreased

The command that allows moving a file from one location to another is the "mv command".

The mv command renames or transfers files and folders from one directory to another. A file or directory keeps its base file name when moved to a new directory. All links to other files are preserved when you transfer a file, with the exception of when you move it to a different file system. A directory and its contents are added beneath the existing directory when you transfer a directory into it.

The TargetDirectory option of the mv command allows you to provide a new file name or a new directory path name when renaming a file or directory.

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The product obtained from the reaction of (S)-2-butanol with tosyl chloride and pyridine, followed by exposure to bromide, is (R)-2-bromobutane.

When (S)-2-butanol is treated with tosyl chloride (TsCl) and pyridine, followed by exposure to bromide (Br⁻), the product obtained is (R)-2-bromobutane.

The reaction proceeds as follows:

(S)-2-butanol + TsCl + pyridine → (S)-2-tosyloxybutane + HCl

(S)-2-tosyloxybutane + Br⁻ → (S)-2-bromobutane + TsO⁻

In the first step, (S)-2-butanol reacts with tosyl chloride and pyridine to form (S)-2-tosyloxybutane. This reaction involves the substitution of the hydroxyl group of the alcohol with the tosyl group (tosyloxy group).

In the second step, (S)-2-tosyloxybutane reacts with bromide (Br⁻) to undergo a nucleophilic substitution reaction, where the tosyl group is replaced by a bromide ion. This results in the formation of (R)-2-bromobutane.

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Competing reactions:

Desired - RX + Mg ⇒ RMgX rate ~ [RX]

Side - RX + RMgX ⇒  R-R + MgX2 rate ~ [RX]²

The desired reaction is favored by keeping the [RX] low so that it reacts with Mg and not RMgVia the Schlenk equilibrium Grignard reagents form varying amounts of organomagnesium compounds. Alkyl halides react with magnesium metal in anhydrous ether solvents to form organometallic reagents.

Grignard reagents are formed by the reaction of magnesium metal with alkyl or alkyl halides. They are wonderful nucleophiles that react with electrophiles such as carbonyl compounds and epoxides. Since Grignard reagents are strongly basic, they often undergo elimination reactions or do not react at all. The transition state of the alkyl halide substitution is less stable than the magnesium bromide complex. This is due to ligation formation between the solvent and magnesium atoms.

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Answer:

hope it helps you a little

Answer: -3112 kJ of heat will be released when 5 moles of nitrogen is produced.

Explanation:

We are given:

Moles of nitrogen = 5 moles

Given chemical reaction follows:

\(N_2H_4+O_2\rightarrow N_2+2H_2O;\Delta H=-622.4 KJ\)

By stoichiometry of the reaction:

If 1 mole of nitrogen gas is produced, the heat released is -622.4 kJ

So, if 5 moles of nitrogen gas is produced, the heat released will be = \(\frac{-622.4kJ}{1mol}\times 5mol=-3112kJ\)

Hence, -3112 kJ of heat will be released when 5 moles of nitrogen is produced.

Answer:

The weathering of Rocks

Explanation:

C

Answer:

Physical changes.

Explanation:

Any physical changes can be related to boiling. Freezing water, tearing paper, anything physical that changes and objects apperance is a physical change.

The periodic table has changed very little since it was originally developed by Mendeleev and Meyer is referred to as a false statement.

This is defined as the arrangement of elements based on their atomic number in a tabular form. It consists of 18 vertical columns which re referred to as groups and seven horizontal rows called period.

Henry Moseley in 1913 organized Mendeleev's periodic table based on physical properties.This took into consideration their atomic number rather than atomic mass and other missing elements.

This is the periodic table which is used currently and therefore hasn't changed much which is why false was chosen.

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A phrase which best defines a covalent bond is: C. Electrons shared between atoms.

A chemical bond can be defined as the forces of attraction that exists between ions, crystals, atoms or molecules of chemical elements and they are typically responsible for the formation of new chemical compounds.  

Hence, a chemical bond is simply a force holding atoms together and binding ions, crystals, or molecules of chemical elements together, in order to form a new chemical compound.

Basically, there are three (3) main types of chemical bonds and these are:

A covalent bond can be defined as a type of bond that typically involves the sharing of electrons between the atoms of a chemical element.

For example, the type of bond formed between two or more carbon atoms is a covalent bond.

In conclusion, a phrase which best defines a covalent bond is electrons shared between atoms.

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Answer:

Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.

plz can i get brainliest:)

Hiiii- Are you asking what the element of Hu is???

If so- it's Hundium.

...

If this was just a random keyboard spam of a question, then Huuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu to you too

Part A: Ru3+ The electron configuration for Ru is [Kr]5s^24d^6. To form Ru3+, three electrons are removed. Therefore, the electron configuration for Ru3+ is [Kr]4d^5.

Part B: As3-

The electron configuration for As is [Ar]4s^23d^104p^3. To form As3-, three electrons are gained. Therefore, the electron configuration for As3- is [Ar]4s^23d^104p^6.

Part C: Y3+

The electron configuration for Y is [Kr]5s^24d^15p^1. To form Y3+, three electrons are removed. Therefore, the electron configuration for Y3+ is [Kr]4d^0.

Part D: Pd2+

The electron configuration for Pd is [Kr]5s^04d^10. To form Pd2+, two electrons are removed. Therefore, the electron configuration for Pd2+ is [Kr]4d^8.

Part A: Ru3+

The electron configuration for Ru is [Kr]5s^24d^6. To form Ru3+, three electrons are removed. This means that the 5s orbital is emptied and one electron is removed from the 4d orbital. Therefore, the electron configuration for Ru3+ is [Kr]4d^5. This configuration indicates that there are 5 electrons in the 4d orbital.

Part B: As3-

The electron configuration for As is [Ar]4s^23d^104p^3. To form As3-, three electrons are gained, filling up the 4p orbital. Therefore, the electron configuration for As3- is [Ar]4s^23d^104p^6. This configuration indicates that there are 6 electrons in the 4p orbital.

Part C: Y3+

The electron configuration for Y is [Kr]5s^24d^15p^1. To form Y3+, three electrons are removed. This means that the 5s and 4d orbitals are emptied. Therefore, the electron configuration for Y3+ is [Kr]4d^0. This configuration indicates that there are no electrons in the 4d orbital.

Part D: Pd2+

The electron configuration for Pd is [Kr]5s^04d^10. To form Pd2+, two electrons are removed, leaving the 5s and 4d orbitals empty. Therefore, the electron configuration for Pd2+ is [Kr]4d^8. This configuration indicates that there are 8 electrons in the 4d orbital.

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Answer:

I don't see any following statements

Explanation:

could you give me some and I'll be happy to help : )

Answer:Settlers wanted more land and occasionally forced Native Americans into slavery. Native Americans refused to trade with the European settlers. Native Americans were outnumbered so they began attacking settlers out of fear. Settlers refused to share new farming and hunting techniques with the Native Americans.

Explanation:

Step 1

The reaction must be completed and balanced as follows:

C3H8 + 5 O2 => 3 CO2 + 4 H2O

-------------

Step 2

Information provided:

20.0 g of C3H8

10.0 g of O2

----

Information needed:

1 mole of C3H8 = 44.1 g

1 mole of O2 = 32.0 g

(use your periodic table please)

-------------

Step 3

By stoichiometry,

C3H8 + 5 O2 => 3 CO2 + 4 H2O

44.1 g C3H8 ---------- 5 x 32.0 g O2

20.0 g C3H8 ---------- X

X = 20.0 g C3H8 x 5 x 32.0 g O2/44.1 g C3H8

X = 72.6 g O2

For 20.0 g of C3H8, 72.6 g of O2 is needed, but there is only 10.0 g of O2.

Therefore,

Answer:

The limiting reactant = O2

The excess = C3H8

Answer:

I think its the electron if this is correct can u mark me brainliest?

Answer:

Explanation:

Comment

Distance is the key fact you have to consider. And  you have seen this phenomenon yourself.

I don't know if you live in the city or the country. It would be easier to explain to a person living in the country, Suppose you live near a road (a dirt road). You see the ruts moving away from you. but did you also notice that they seem to come together? The distance between the ruts gets smaller. Now suppose someone comes out to get their mail. They are about 1 1/2 miles away. Don't they look smaller than they really are?

If you live in the city, you can see the same sort of thing, but it's hard to pick an example to use. I'm thinking of something like a flag on a hill that is part of a park. If you move away  from both, don't they look smaller?

That's what happens, but instead of miles, you are talking about billions of miles -- sometimes light years (the distance light travels in a year). The stars are so big that even these huge distances do not prevent us from detecting them.

Spanish System is not the name of a measurement system

WHAT IS MEASUREMENT SYSTEM?

Hence, Spanish System is not one of the names of measurement of systems.

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The concentration of the solution is .10M

Here given,

V1 = 5.Oml

M1 = .20M

V2 = 10.0ml

We have to find M2

For determining a missing dilution equation value, where M1 and M2 are the molarities of the solutions, expressed in mol/L or M, and V1 and V2 are the volumes of the solutions.

By applying V1M1 = V2M2

By substituting values,

(5.0 ml)(0.20 M) = (10.0 ml) (x M)

x = (5.0)(0.20)/10.0

x = 0.10 M

The fact that one begins with 100. ml and ends with 3.0 ml has no bearing on the final concentration. It would influence the total number of moles of HCl present but not the concentration.

Therefore the concentration of solution is .10M.

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The value of Δn for the given equation in relation to Kc (equilibrium constant) and Kp is 1.

In the given chemical equation,

Two solid potassium (K) react with two liquid water (H2O) to form two aqueous potassium hydroxide (KOH) and gaseous hydrogen (H2) in an equilibrium process.

The change in the number of moles (δn) for the given reaction is equal to the difference in the total number of moles of the product and reactant side.

According to the chemical equation,

Two solid potassium (K) react with two liquid water (H2O) to form two aqueous potassium hydroxide (KOH) and gaseous hydrogen (H2) in an equilibrium process.

Initially, the total number of moles of reactants = 2 moles of K + 2 moles of H2O= 2 moles of K2 + 1 = 5

Total number of moles of products = 2 moles of KOH + 1 mole of H2= 2 moles of K2 + 1 = 5

Total moles of reactants and products = 10

The number of moles of gaseous products = 1, H2

The number of moles of gaseous reactants = 0

Therefore, δn = (number of moles of gaseous products) - (number of moles of gaseous reactants)= 1 - 0= 1

Therefore, δn for the given chemical equation is 1.

Relating Kp and Kc:Kp and Kc can be related to each other by using the following equation:

Kp = Kc (RT)Δn

Where, R is the gas constant (0.082 L atm/K mol),

T is the temperature, and Δn is the difference in the number of moles of gaseous products and reactants.

Kc for the given chemical equation is given by,

Kc = [KOH]2[H2]1/[K]2[H2O]2

Therefore,Δn = (2 + 1) - (2 + 0) = 3

Now, using the above equation,

we haveKp = Kc (RT)Δn= Kc (RT)3

The above equation relates Kp and Kc. Here, Kp can be determined if Kc and Δn are known and vice versa.

Hence, the value of Δn for the given equation in relation to Kc and Kp is 1.

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1.  We can see here that energy is required to change the phase of matter. For example, energy is required to melt ice, vaporize water, and condense steam. The amount of energy required to change the phase of matter is called the latent heat.

Energy is a fundamental concept in physics and refers to the ability or capacity of a system to do work or produce a change.

2. The demonstration on the sample of water showed that water can exist in three phases: solid, liquid, and gas. The solid phase is ice, the liquid phase is water, and the gas phase is steam.

The demonstration started with ice at 0°C. As heat was added to the ice, the temperature of the ice increased. However, the ice did not melt until the temperature reached 0°C. This is because the energy from the heat was used to break the bonds between the water molecules in the ice. Once the bonds were broken, the ice melted and became water.

3. Completing the

Page 4:

Heating and cooling curves are graphical representations of how temperature changes during the process of heating or cooling a substance. They illustrate the relationship between temperature and the state of matter.

Both curves show:

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Same number of protons and different number of neutrons.

Oxygen is a chemical element with 8 protons. It is capable of achieving a noble gas electronic configuration by accepting two electrons. Oxygen is important for many living organisms.

Oxygen-16 and oxygen-18 differ in the number of neutrons in their nuclei. Oxygen-16 has 8 neutrons, while oxygen-18 has 10 neutrons. Oxygen-16 and oxygen-18 have the same number of protons and electrons. Both neutrons and protons have mass, so changing the number of neutrons changes the mass of oxygen. These elements with different numbers of neutrons are referred to as isotopes. Both oxygen-16 and oxygen-18 are stable isotopes of oxygen and are not radioactive.

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Fluorine atoms = 1.517 x 10²³

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

\(\large{\boxed{\boxed{\bold{mol=\frac{mass}{molar\:mass}}}}\)

Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison so that the compound has a fixed composition of elements

\(\tt mass~F=\dfrac{4.Ar~F}{MW~C_2F_4}\times mass~C_2F_4\\\\mass~F=\dfrac{4.19}{100}\times 6.3=4.788~gr\)

\(\tt =\dfrac{4.788}{19}=0.252\)

\(\tt 0.252\times 6.02\times 10^{23}=1.517\times 10^{23}\)

The properties of a gas can be best described by option (4) "no definite volume and no definite shape."

A gas does not have a definite volume because its particles are in constant, random motion and can move freely within the container it occupies.

Additionally, a gas does not have a definite shape because it takes the shape of its container. This is due to the fact that the particles in a gas have high kinetic energy and are not held together by strong intermolecular forces.

Gases are also highly compressible and exhibit low densities compared to solids and liquids. They are easily expandable and can occupy any available space. The behavior of gases can be explained by the kinetic molecular theory, which states that gases consist of tiny particles in constant motion that collide with each other and with the walls of the container they occupy.

Overall, the properties of gases make them highly useful in a variety of applications, including heating and cooling, transportation, and chemical reactions. So, the correct option is (4) no definite volume and no definite shape​.

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The oxidation number of the  atom is the number that will represents the total number of the electrons lost or the gained by it.

The oxidation number of the  atom is the number that will represents the total number of the electrons lost or the gained by it. The free element has an oxidation number that is equal to zero. For the monoatomic ions, the oxidation number will always be has the same value as the charge related  to the ion.

The hydrogen atom (H) will exhibits an oxidation state of the +1. The Oxygen has the oxidation of the -2 in most of the compounds. All the alkali metals that have the oxidation state of the +1 in the alkali compounds.

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54.0g Al reacts with 64.0g O2 to form Al2O3 according to the equation. 136 grams of Al2O3 form from 64.0 g O2.

The term molar mass is defined as the the ratio between the mass and the amount of substance of any sample of that compound. The molar mass is denoted by the symbol "M".

M = m / n

Molar Mass of O₂ is 32 g/mol

Molar Mass is Al₂O₃ is 102 g/mol

4 Al + 3 O₂ ⇒ 2 Al₂O₃

64.0 g O₂           1 mole           2 moles Al₂O₃            102 g

-----------------  x  --------------  x  ------------------------  x   -------------  

                            32 g               3 moles O₂             1 mole

=  136 g Al₂O₃

Thus,54.0g Al reacts with 64.0g O2 to form Al2O3 according to the equation. 136 grams of Al2O3 form from 64.0 g O2.

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Answer:

B. melting of ice caps

Explanation:

Answer:

Explanation:

The two chambers are at temperature of 27° and pressure of 1 atm . Now temperature of second chamber is increased to 400°C so its pressure will be increased but pressure of chamber whose temperature remains at 27°C will remain unaltered . Hence the pressure of chamber at 27°C will be at 1 atm.

The volume of second chamber is 4 V₀ , temperature changed from 27 + 273  = 300 k to 400 + 273 = 673 K , initial pressure was 1 atm . Let final pressure be P

From gas law  formula

1 x 4 V₀ / 300 = P x  4 V₀ / 673

P = 1 x 673 / 300

= 2.24 atm .

The pressure of the chamber at 400°C  will be 2.24 atm.