Which element has similar properties to neon (Ne)? HELP ME PLS!

Chemical formula of hydroxide ion is OH\(^-\) as the ion has 9 protons and 10 electrons and 1 extra electron results in generation of negative charge on the ion.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Answer:

H2O

Explanation:

Water has a higher b.p because it contains hydrogen bonding which is stronger than than the dipole-dipole bonds in hydrogen sulfide

Answer:

The answer is

Explanation:

To find the volume in cm³ we must first find the volume of the rock .

To find the volume of the rock , subtract the initial volume of water from the final volume of the water when the rock was dropped in it

That's

volume = final volume of water - initial volume of water

volume of rock = 47.6 mL - 41.5 mL

= 6.1 mL

Next we use the conversion

If 1 mL = 1 cm³

Then 6.1 mL = 6.1 cm³

Hope this helps you

The molarity of the chemical X is 11.65 M.

To calculate the molarity (c) of the solution, we need the number of moles (n) of substance X and the volume (V) of the solution. We can assume that we have 100 mL = 0.1 L of the solution. Now we have the volume, and we can use it to calculate the mass (m) of the solution using its density (d = 1.18 g/mL):

d = m/V ⇒ m = d * V

m = 1.18 g/mL * 100 mL

m(solution) = 118 g

From this, we can obtain the mass of substance X using the mass percentage (%w = 36% = 0.36):

m(X) = %w * m(solution)

m(X) = 0.36 * 118 g

m(X) = 42.48 g

Now that we have the mass of X, we divide it by its molar mass (M = 36.46 g/mol) to obtain the number of moles:

n = m/M

n = 42.48 g / 36.46 g/mol = 1.165 mol

Finally, we calculate the molarity of the solution:

c = n/V

c = 1.165 mol / 0.1 L = 11.65 M

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If h is equal to 5.3 cm, the pressure in the flask is 39.85 torr, 133.32 pascals, and 0.0067 atmospheres.

The difference h is a measure of the pressure of the gas inside the flask. If h is equal to 5.3 cm, the pressure in the flask in torr, pascals, and atmospheres are as follows: Calculation of pressure in Torr: The difference h in the manometer is equal to the difference in height between the mercury levels in both arms of the U-tube, which represents the pressure of the gas. 1 Torr is equal to the pressure exerted by a column of mercury that is 1 mm high (mm Hg).

Since 1 cm is equal to 10 mm, the pressure will be measured in Torr by dividing h by 0.133. h = 5.3 cm. Therefore, the pressure in Torr = (5.3 cm)/0.133= 39.85 Torr.Calculation of pressure in Pascals: To calculate the pressure in Pascals, the formula is P = ρgh, where ρ is the density of mercury, g is the acceleration due to gravity, and h is the height of the mercury column.

To convert pressure in Torr to Pascals, we need to use the following conversion factor: 1 Torr = 133.32 Pascals. Now, we can substitute the values:P = ρgh= (13,595 kg/m³) × (9.81 m/s²) × (5.3 cm/100)= 680.3 PaTherefore, the pressure in Pascals is 680.3 Pa. Calculation of pressure in atmospheres: To convert Pascals to atmospheres, we need to use the following conversion factor: 1 atm = 101,325 Pascals. Now, we can substitute the values: Pressure in atm = 680.3 Pa / 101325= 0.0067 am therefore, the pressure in atmospheres is 0.0067 atm.

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If we add a much larger excess of t-butyl alcohol to the benzene ring in highlighted positions continue then ther will be no further friedel crafts alkylation would continue to occur due to stric hindrance.

First step is aromatic electrophilic substitution. As present in above first figure. The above product result is more expected because these positions are more electron rech. Second step, as we know ortho and para position are more reactive when one OCH₃ group in conjugation, similar for next OCH₃group. In both of reaction the ortho position, of OCH₃ is more electron dense. The last step of Reactions present in above figure.

The further addition of bulky groups, t-butyl groups to the benzene ring to highlighted positions would not continue the friedel crafts alkylation.

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The net ionic equation of the reaction is:

The pH does not change significantly because the conjugate base reacts with the acid to neutralize it and form a weak acid.

A buffer solution is a solution that resists changes to its pH when a small quantity of strong acid or strong bases is added to it.

Buffer solutions are able to resist changes in their pH as a result of the composition of the buffer solution.

Buffer solutions are made from a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid.

The buffer solution that is prepared from HClO, a weak acid, and NaClO, its conjugate base dissociates as follows in solution when a small quantity of a strong acid or base is added to it.

When HCl is added to the buffer, the ionic equation that occurs is as follows:

NaClO + HCl  ---> NaCl (aq) + HClO (l)

The net ionic equation is H⁺ + ClO⁻ ---> HClO (l)

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1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵ is the electronic configuration of Cr. the correct answer is D.

There are 24 electrons in all, according to the electron arrangement. A neutral atom will contain 24 protons if it has 24 electrons. The element is determined by its proton count. Chromium, symbol Cr, is the 24th element.

Since Cr contains 24 protons and the +2 charge would result in the nucleus having 26 protons, Cr²⁺ is invalid.  Cu is made up of 29 protons. The copper would be Cu⁵⁺ as there are only 24 electrons. Cu²⁺ was rejected for the same reason.

Therefore, 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵ is the electronic configuration of Cr.

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One mole of an ideal monatomic gas initially at 300 K and a pressure of 15 atm expands to a final pressure of 1 atm. The expansion can occur via any one of four different paths: 1. isothermal and reversible, 2. isothermal and irreversible, 3. adiabatic reversible, and 4. adiabatic irreversible.

In irreversible processes, the expansion occurs against an external pressure of 1 atm. For each case, we can calculate the values of q, w, ΔU, and ΔH using the following equations:

1. Isothermal and reversible:
q = -w = nRTln(V2/V1)
ΔU = 0 (since the temperature is constant)
ΔH = 0 (since the enthalpy is a function of temperature)

2. Isothermal and irreversible:
q = -w = nRTln(V2/V1)
ΔU = 0 (since the temperature is constant)
ΔH = 0 (since the enthalpy is a function of temperature)

3. Adiabatic reversible:
q = 0 (since the process is adiabatic)
w = -nCvΔT = -nCv(T2-T1)
ΔU = nCvΔT = nCv(T2-T1)
ΔH = nCpΔT = nCp(T2-T1)

4. Adiabatic irreversible:
q = 0 (since the process is adiabatic)
w = -PextΔV = -Pext(V2-V1)
ΔU = nCvΔT = nCv(T2-T1)
ΔH = nCpΔT = nCp(T2-T1)

Using these equations, we can plug in the given values for n, R, T1, P1, P2, V1, and V2 to calculate the values of q, w, ΔU, and ΔH for each case. Note that for an ideal monatomic gas, Cv = 3/2R and Cp = 5/2R.

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Using smaller pieces of coal and increasing the concentration of oxygen can both increase the rate of the exothermic combustion reaction of coal. The correct answer is d. both (a) and (b) are correct.

When coal is broken down into smaller pieces, it increases the surface area available for the reaction. This allows for more contact between the coal and oxygen, promoting faster and more efficient combustion. The increased surface area facilitates the exposure of more coal particles to the surrounding oxygen, leading to a higher frequency of successful collisions between reactant molecules and an overall increase in the reaction rate. Similarly, increasing the concentration of oxygen provides a higher number of oxygen molecules available for the combustion reaction. This higher concentration promotes more frequent collisions between oxygen and coal particles, resulting in an accelerated reaction rate. Lowering the temperature, as mentioned in option (c), would not increase the rate of the reaction. Generally, increasing the temperature enhances reaction rates for exothermic reactions. Therefore, the correct answer is option d, as both using smaller pieces of coal (increased surface area) and increasing the concentration of oxygen can effectively increase the rate of the exothermic combustion of coal.

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Answer:

-415.5°F (-248.6°C)

Explanation:

Answer: The melting point/condensation point of neon is 24.53888889. Of course, I'm sure you can round that. The freezing point would be 521.74. All of this is in Kelvin

Answer:8g mL^-1

Multiple 1mL * 40g/5mL

The formation of krypton from rubidium decay is a result of beta emission.

In this process, a neutron in the rubidium nucleus is converted into a proton, and an electron (beta particle) is emitted. This increases the atomic number by one, changing rubidium into krypton while maintaining the same mass number.

The process of rubidium decay involves the release of a beta particle (electron) from the nucleus, which results in the conversion of a neutron into a proton. This process is known as beta decay, and in the case of rubidium, it leads to the formation of krypton. Therefore, the formation of krypton from rubidium decay is a result of beta emission.

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To confirm Newton’s Second Law using a laboratory report, you will need to conduct an experiment using a simulation and gather data. Newton’s Second Law states that force equals mass times acceleration.

Here's how you can write a laboratory report to confirm Newton’s Second Law using the simulation and gathered data. Introduction: This section should include a brief explanation of the theory behind Newton’s Second Law and what you will be testing in your experiment. It should also include your hypothesis.

Procedure: This section should explain the steps you took to conduct your experiment. In this case, it would involve using the simulation to apply different forces to objects with different masses and measuring their acceleration.

Data: This section should present the data you collected during your experiment. It can be presented in tables or graphs, and should include measurements of force, mass, and acceleration for each trial.

Analysis: This section should analyze the data you collected to determine if it supports your hypothesis and confirms Newton’s Second Law.

Conclusion: This section should summarize your findings and draw conclusions based on the data you collected. It should also discuss any errors or limitations of the experiment and suggest areas for further research.

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Multiple personality or dissociative identity disorder often begins in childhood as a result of unbearable experiences.

The correct option is b) in childhood as a result of unbearable experiences.

Dissociative identity disorder (DID), previously known as multiple personality disorder, is a mental health condition characterized by the presence of two or more distinct identities or personality states within an individual. These identities may take control of the person's behavior and memory at different times.

In most cases, DID begins in childhood as a result of unbearable experiences. Children who have experienced trauma, such as physical or sexual abuse, neglect, or other forms of significant emotional distress, may develop DID as a way to cope with and dissociate from these overwhelming experiences. Dissociation serves as a defense mechanism to protect the individual from the pain and emotional turmoil associated with their traumatic past.

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According to Lewis theory, an acid is a substance that can accept a pair of electrons, while a base is a substance that can donate a pair of electrons. In the case of AlBr3 (aluminum bromide), it acts as a Lewis acid.

Aluminum bromide is a compound composed of aluminum and bromine atoms a base is a substance that can donate a pair of electrons. In this compound, the aluminum atom has a partial positive charge, making it electron-deficient. It can accept a pair of electrons from a Lewis base. The bromine atoms, on the other hand, have lone pairs of electrons that they can donate to a Lewis acid, making them potential Lewis bases.

Therefore, in the Lewis theory, AlBr3 is considered an acid due to its ability to accept a pair of electrons from a Lewis base.

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Answer:

negative charge

Explanation:

An anion has more electrons than protons, consequently giving it a net negative charge.

hope this helps, pls mark brainliest :D

a- Aluminium bromide has the following formula: AlBr₃, so the unbalanced equation is:

As we can see, for now the aluminium atoms are balanced, but the bromine is not. To balance the bromine, we can put 3 in front of Br₂ and 2 in front of AlBr₃. That way, we will have a total of 6 bromine atoms in each side:

But now the Al is unbalaced, so to fix it we can add a 2 in front of Al to get the balanced equation:

b- The aluminium are the lone atoms, so, counting them, we see that there are 8 atoms initially.

c- Each pair of empty circles represent a molecule of Br₂, counting them we have 6 molecules initially.

d- The proportion of Al to AlBr₃ is 2:2, that is, 1:1, so if all Al reacts, we would produce the same amount of AlBr₃ as Al, which would be 8 molecules.

The proportion of Br₂ to AlBr₃ is 3:2, so is all Br₂ reacts we will get 2/3 of that as AlBr₃, which would be 6*2/3 = 4 molecules.

This shows that there is not enough Br₂ to react with all 8 atoms of Al, meaning only 4 molecules of AlBr₃ will be produced.

e- Since there is not enough Br₂ to react with all Al present, the limiting reactant is the bromine.

f- The excess reactant is the other one, so if bromine is the limiting, the aluminium is the excess reactant.

g- Since only 4 molecules of AlBr₃ will be formed with all the bromine present, since the proportion of Al to AlBr₃ is 1:1, we wil need only 4 atoms of Al to produce them, which meand that, from the total 8 atoms, we will get

4 atoms of Al as excess reactant after the reaction is complete.

Chlorine is an element and carbon dioxide is a compound, this is the answer to the above question.

The matter is divided into categories using elements, compounds, and mixtures. Because all of the atoms in the simplest chemical compounds are the same size, they are referred to as elements. Compounds are made up of two or more elements that are chemically linked together in a certain sequence.

Elements, which are subcategories of atoms, may be defined by the same amount of protons. An element's atoms have the same number of protons, but its mass and number of neutrons may differ.

A compound is a substance that combines two or more distinct elemental kinds in a certain ratio of its atoms. During the process of fusion, some of the distinctive attributes of the constituent pieces are lost while the newly formed molecule picks up new traits. Compounds are represented using chemical formulae.

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Answer:

Explanation:

chlorine is an element while carbon dyxoide is a compound

After going through all the details given environment A is a rainforest so the correct option is "Rainforest".

Rainforest is the type of vegetation and it specializes because the amount of rain that it gets is very high as compared to the rest of the vegetation like swamps, deserts, or tundra.

Swamp and desert get some rain but they are not warm throughout the year and the rain that they get is also very less as compared to the rainforest.

Tundra on the other hand are generally cols with very limited rainfall throughout the year.

So in the question, we can see that desert, swamp, and tundra doesn't match the description of environment A which is given in the question that is, it is warm and gets a lot of rain. So the correct option is Rainforest.

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Answer: Blue.

Explanation: Regardless of temperature, the metalic coloring oxide will produce a specific shade of blue.

Answer:

A BLUE-VIOLET

Explanation:

got it right on edge

The solution with the lowest concentration of hydrogen ions [H⁺] is  laundry detergent. (A)

The pH scale measures the concentration of hydrogen ions [H⁺] in a solution. The lower the pH, the higher the concentration of hydrogen ions [H⁺], and the more acidic the solution is.

The higher the pH, the lower the concentration of hydrogen ions [H⁺], and the more basic the solution is.

In this case, the solutions are ranked from lowest to highest pH: Vinegar, pH 3 Banana, pH 5 Toothpaste, pH 8 Laundry detergent, pH 10 Since laundry detergent has the highest pH, it has the lowest concentration of hydrogen ions [H⁺], making it the most basic solution. Therefore, the correct answer is a. laundry detergent.

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The correct answers from the task given above which are true about part of the safety protocol for this lab experiment are as follows:

Safety protocols in the scientific laboratory are those safety measures and precautions which are usually adviced to be taken to ensure one's well being and protection from danger.

From the problem given above, It is very important to always label correctly the species of reagents or any glassware used in the laboratory.

In conclusion, we can now confirm from all the explanations above that it is very expedient that we observe all safety measures while performing experiment in the laboratory.

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Answer:

here ya go- I made the mistake of believing the person whose answer is above me.

Explanation:

The gravity force on an object from the Earth is the same regardless of whether the object is surrounded by air .

the Earth has an average gravitational force. Different locations on Earth have gravitational forces that are larger or smaller than average. This is because each location has more or less mass than the average

Answer: 32.9345 cm^3

Explanation:

The volume of the water that must be added to exactly fill the container with the lead sphere sitting at the bottom of the container will be 3.222 cubic cm.

Volume is defined as the space occupied by any solid object in the three-Dimensions. For the sphere, the radius will be the parameter to calculate the volume. For a cylindrical body, the height and the radius are required to calculate the volume.

Given that A glass container has a volume of 42.122cm³ A lead sphere of radius 2.102 cm is placed inside the glass container.

To calculate the volume of the water calculate the volume of a lead sphere and subtract it from the volume of the cylindrical container.

Volume of lead sphere = ( 4 / 3 )πr³

Volume of lead sphere = ( 4 / 3 ) x π x ( 2.102)³

Volume of lead sphere = 38.90 cubic cm

Amount of water to fill in the container:-

= ( Volume of container - Volume of the lead sphere )

= 42.122 - 38.90

= 3.222 cubic cm

Therefore, the volume of the water that can be filled in the container will be 3.22 cubic cm.

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Solid waste can be disposed by open dumping, landfill and incineration. Here, Incineration system is one of the methods of disposing solid waste. The system utilizes combustion processes to convert solid waste into ash and gases where the ash is later taken to the landfill.

Incineration is considered as a technology for ex situ thermal treatment which is based on the application of high temperature (870–1200 °C) to soil for burning harmful organic chemicals. Metals cannot be destroyed by using this technique. The efficiency of a properly operated incinerator is very high, especially for PCBs and dioxins. Incineration differs from the thermal desorption system in that incineration needs higher temperatures to chemically oxidize or decompose the contaminants, whereas the second method only volatilizes them.

The Advantages of incineration system of solid waste disposal includes:

1. Reduction in the volume of waste ,Incineration reduces the volume of waste to 10% to 20% of its original size.

2. Generation of electricity Incineration plants generate electricity by harnessing the heat energy that is generated by burning solid waste.

The Disadvantages of incineration system of solid waste disposal includes:

1. Production of toxic fumes Incineration of certain materials can lead to the production of toxic fumes such as dioxins.

2.  The installation of incineration plants is quite expensive. The plants require regular maintenance to remain in good working condition. For this reason municipalities and cities that have to bear the cost.

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The balanced chemical equation for the reaction is Fe(s) + 3O2(g) → 2Fe2O3(g). This tells us that 1 mole of iron reacts with 3 moles of oxygen to produce 2 moles of iron oxide.

We know that we have 27.3 g of iron and 45.8 g of oxygen. We can convert these masses to moles using the following molar masses:

Molar mass of iron = 55.845 g/mol

Molar mass of oxygen = 15.999 g/mol

Number of moles of iron = (27.3 g) / (55.845 g/mol) = 0.500 mol

Number of moles of oxygen = (45.8 g) / (15.999 g/mol) = 2.88 mol

We can see that we have less moles of iron than oxygen. This means that iron is the limiting reagent and oxygen is the excess reagent.

The number of moles of oxygen that reacted is equal to the number of moles of iron that reacted. This means that 0.500 mol of oxygen reacted and 2.88 mol - 0.500 mol = 2.38 mol of oxygen remained as excess.

We can convert this number of moles to a mass by multiplying by the molar mass of oxygen:

Mass of excess oxygen = (2.38 mol) * (15.999 g/mol) = 37.8 g

Therefore, 37.8 g of oxygen remained as excess after the reaction was complete.

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Answer:

b

Explanation:

Ethyne  will contain the strongest bond between the two carbon atoms as  the triple bonds are the strongest.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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The chemical properties of an element are determined by which particle of an atom?

\(\longrightarrow{\green{c.\:proton}}\) 

Explanation:

The chemical properties of an element are determined by the subatomic particle known as a proton. The number of protons in an atom is called its atomic number ( Z ).

\(\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{♡}}}}}\)