Please read the following direction I need it ASAP!!!

HIghschool Earth & Physical Science (9th Grade)

Electrons and proton are a type of subatomic particle with a negative and positive charge. Protons are held together in the atom's nucleus by the nuclear force. A subatomic particle without charge is the neutron.

The electron, the smallest constituent part of an atom, has a negative charge. Protons and electrons are present in an atom in a neutral state in an equal number. One electron and one proton are all that the hydrogen ion has. On the other hand, the atomic nucleus possesses 92 protons, that means 92 electrons.

Electrons are present outside of the atom's nucleus, in contrast to neutrons and protons that are contained inside the nucleus at its center. Negative electrons are drawn to the positively charged nucleus so because electric charges of opposite sign attract one another.

To know more about Electron visit:

https://brainly.com/question/1255220

#SPJ13

If there is no change in pressure or no change in volume of the system, then the heat of the reaction will be equal to the change in internal energy of the system.

According to the first law of thermodynamics,

The total change in internal energy of the system is equal to the sum of the heat added to the system and the work done by the system.

So, we can write,

ΔH = ΔQ + W

Where,

ΔH is the heat of the reaction,

ΔQ is the heat evolved or heat given,

W is the work done by the system,

We know work by the gas is,

W = VΔP or PΔV

Where V is the volume of the gas and P is pressure of the gas.

So, for the heat of the system to be equal to that of the hear evolved in the system.

W = 0

For W to be zero,

Either, ΔV or ΔP has to be zero,

So, we can conclude that if change in the pressure of the system of the change in volume of the system is zero.

To know more about First law of thermodynamics, visit,

https://brainly.com/question/1613201

#SPJ4

Answer: There is equal number of each type of atom on the reactant and product side.

Explanation:

Three hardest substances that were tested is aluminum, silicon dioxide and sucrose and the classes of solids do these substances belong is metallic type of solid and general feature do these three types of solids have in common are melting point and hardness

Hardest substance are that cannot be crushed, cut distorted or scrapped readily and the hardness of a substance is dictated by its crystalline structure which is regular and the three three hardest substances that were tested is aluminum, silicon dioxide and sucrose

Three substances classes of solid are also same the classes of solids these substances belong is metallic type of solid and general feature are also same of solids have in common are melting point and hardness metallic solid means metal is a solid in which hard in the nature shiny and smooth and so many metals are too hard

Know more about solid

https://brainly.com/question/27699151

#SPJ1

The pressure - volume work can be determined using the change in volume ΔV and a constant pressure P. Here, the final volume for the work done of 355 J at a pressure of 1 atm is 346 l.

Work done on system or by a system can be thermodynamically determined using the equations connecting the variables temperature, T pressure p and volume V.

A pressure-volume work done is the expansion or compression of a gas at constant pressure and this can be mathematically written as:

W  = - P ΔV.

    = -P (V2 - V1)

It is given that the initial volume V1 = 8.50 L at a pressure of 1 atm and the work done for the expansion to volume V2 is 655 J. Thus, the final volume V2 is calculated as follows:

- 355 J = 1 atm ( V2 - 8.50 L)

      V2 = -355 + 8.50 L

            = 346.5 L.

Here, the volume is increased highly from the initial volume so this expansion and is work done by the system. Therefore, the final volume of the system is 346 liters.

To find more about work done, refer the link below:

https://brainly.com/question/10334435

#SPJ1

When 20 grams of a salt is dissolved in 95 grams of water, the temperature of the solution decreases from 40oc to 0oc. 880 calories heat is absorbed, the Specific Heat of the solution is 1.1 Cal/goc.

delta t = T f - T i

          = 0 - 40

          = -40 degrees Celsius

c = 1.1 Cal/g degrees Celsius

m = 20 grams

heat absorbed (q) = mc(delta)t

                          q = 20 * 1.1 * -40 degrees Celsius

                           q = 880 Cal

Learn more about Specific Heat here:

https://brainly.com/question/21041726

#SPJ4

         A quantum is the smallest discrete unit of a phenomenon (plural: quanta). For instance, a photon is a quantum of light, while an electron is a quantum of electricity. Quantum is a Latin word that means "quantity" or "how much?" Anything that can be measured is something that can be quantified.

             Bohr's hypothesis, often known as quantum theory, postulated that electrons move around the nucleus according to the classical principles, but with restrictions on the orbits they can take and the energy they lose as radiation when they change orbits.

        The Bohr model, also known as the Rutherford-Bohr model, was first proposed by Niels Bohr and Ernest Rutherford in 1913 and describes an atomic system with an orbiting system of electrons and a small, dense nucleus that is similar to the Solar System in structure but is attracted by electrostatic forces rather than gravity.

           A small positively charged nucleus is encircled by rotating negatively charged electrons in set orbits, according to the Bohr Atomic Model. He came to the conclusion that an electron will have more energy if it is placed far from the nucleus and less energy if it is located close to the nucleus.

To Learn more About  quantum, Refer:

https://brainly.com/question/26438203

#SPJ13

We need to understand that reactions can happen at different speeds depending on the conditions to develop methods for production improvement.

The rate of any chemical reaction depends upon the nature of the reacting substances.  Under the same conditions , reactions that appear similar have different rates of reaction. Chemical reaction proceeds in different speeds, depend on the various factors such as type of chemical transformation , temperature and other factors. the information about the speed of reaction is useful in large scale production.

Thus, We need to understand that reactions can happen at different speeds depending on the conditions to develop methods for production improvement.

To learn more about rate of reaction here

https://brainly.com/question/13440548

#SPJ1

(a), (b), and (d) are the sets of quantum numbers that are not allowed in the hydrogen atom.

Hydrogen is a single-electronic species i.e. only one electron is accommodated in the orbital. The electronic configuration of hydrogen is 1s¹. It expresses the set of possible quantum numbers for one electron.

The range of 'ℓ' lies between '0' to 'n-1' i.e. '0' to '0'.

The range of 'm' lies between 'ℓ-1' to 'ℓ+1' i.e. '0' to '0'.

(a) n≠3; The principal quantum number representing one electron of hydrogen is '1'.

(b) n≠4; The principal quantum number representing one electron of hydrogen is '1'.

(d) n≠2; The principal quantum number representing one electron of hydrogen is '1'.

Learn more about questions on Quantum Numbers:

https://brainly.com/question/1594104

The molarity of the solution is 0.619 M if we dissolve 23.4 g of manganese(ii) sulfate in a volumetric flask and add water to a total volume of 500 ml.

The molarity is equal to the moles of a solute divided by the total number of liters in the solution. The molarity of a material quantifies its concentration in a given volume of solution.

Molarity is the concept that describes the relationship between moles of a certain solute and the volume of the supplied solution. To calculate your molarity, you must start with moles and volumes, moles and milliliters, and mass and volumes.

Molarity formula and units

The units of molarity are M or mol/L.

Molarity equation

M = moles solute/liters solution

Molarity = number of moles of solute divided by the volume of solution in a liter

= number of moles of solute × 1000/ volume of solution in the liter

= number of moles

= Mass/ molecular weight

= 23.4/151

= 0.155moles

Molarity = 0.155× 1000/250

= 0.619 M

The concentration of manganese ion = concentration of sulphate ion = 0.619 M

For further information on molarity refer to:

https://brainly.com/question/17281502

#SPJ4

The molar mass of the metal Sulfide  is 83.02g/mol.  

The molar mass of Sulfide  is the addition of molar mass of Sulphur with molar mass of given metal which is given by subtract the molar mass of hydroxide from total molar mass of metal hydroxide.

The molar mass of the [tex]M(OH)_{4}[/tex] =118.97g/mol

Molar mass of Oxygen = 15.999g/mol

Molar mass of Hydrogen= 1.008g/mol

Therefore:

molar mass of [tex]M(OH)_{4}[/tex]= (molar mass of M) +4(molar mass of oxygen + molar mass of hydrogen)

118.97=(molar mass of M)+(15.999 x4)+(1.008x4)

118.97=(molar mass of M)+(63.996+4.032)

118.97-68.028=molar mass of metal(M)

molar mass of Metal=50.942 g/mol (that is Vanadium)

Molar mass of metal + molar mass of Sulphur to give metal sulfide.

50.942+32.06=83.02g/mol

Hence,  the molar mass of  Vanadium Sulfide([tex]V_{2} S_{5}[/tex] ) is 83.02g/mol.  

To learn more about molar mass of Metals, Click Here

brainly.com/question/6112557

#SPJ4

Answer:

in meters its 0.01175

Explanation:

Answer:

0.01175 meters

Explanation:

Answer: Fe is the element that is being oxidized (oxidation number changes from +2 to +3) while Cl is the element that is reduced (oxidation number changes from +5 to -1) in the given reaction.

Explanation:

The question requires us to find the element that is oxidized and the one reduced in the following chemical reaction:

To solve this problem, we need to determine the oxidation number of all elements in the reactants and products sides, and then identify the elements that had their oxidation number increased (oxidized species) and decreased (reduced species).

To identify the oxidation numbers, we'll need to remember a few points:

- K is an alkali metal (part of group 1 in the periodic table), and it usually assumes the oxidation number +1;

- O usually presents oxidation number -2, except in a few specific cases;

- the anion (SO4) presents total charge -2 (in this anion, S presents oxidation number +6 and O, -2);

- H usually presents oxidation number +1.

Next, let's identify the oxidation number of all elements involved in the reaction, on both sides of the chemical equation. Since all compounds are neutral (i.e., they do not present charge), the sum of all oxidation numbers must be 0:

(note that the oxidation number of each element is indicated in red, above the respective element, while the contribution of this element to the molecule charge, considering the number of atoms, is represented in blue below the element).

In the image above, we can see that Cl has its oxidation number changing from +5 in KClO3 to -1 in KCl (highlighted in purple), while Fe has its oxidation number changing from +2 in FeSO4 to +3 in Fe2(SO4)3 (highlighted in green).

Therefore, we can say that Fe is the element that is being oxidized while Cl is the element that is reduced in the given reaction.

Beryllium exists in Group 2 (Column 2) with the atomic number 4.

The atomic number of the next element in the group would be right below it, Magnesium (Mg). Magnesium contains the atomic number 12.

The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number. This is the number of protons present in the nucleus of each atom of that element, or the proton number, for conventional nuclei. Ordinary chemical elements can be uniquely identified by their atomic number.

The number of protons in an atom determines its atomic number, and isotopes have the same atomic number but different numbers of neutrons.

Beryllium exists in Group 2 (Column 2) with the atomic number 4.

The atomic number of the next element in the group would be right below it, Magnesium (Mg). Magnesium contains the atomic number 12.

The atomic number is the small number on the top left corner of the square of the element.

To learn more about atomic number refer to:

https://brainly.com/question/1805828

#SPJ4

After connecting the battery to the wire, the student brings a few pieces of iron near the iron nail. The statement which best describes what will happen to the iron pieces is that: B. The Iron nail behaves like a magnet that attracts the pieces of iron.

The law of magnetism states that the unlike (different) poles of a magnet would attract each other while like poles of a magnet would generally repel one another.

This ultimately implies that, two north (N) or south (S) poles of a magnet would repel one another while a north (N) and south (S) of a magnet would attract each other.

Based on the law of magnetism, we can reasonably infer and logically deduce that if this student should bring a few pieces of iron near the iron nail after connecting the battery to the wire, the iron nail would behave like a magnet by attracting the pieces of iron because they are oppositely charged.

Read more on magnet here: brainly.com/question/27862911

#SPJ1

Complete Question:

After connecting the battery to the wire, the student brings a few pieces of iron near the iron nail. Which statement describes what will happen to the iron pieces?

answer choices

The battery behaves like a magnet that repels the pieces of iron.

The Iron nail behaves like a magnet that attracts the pieces of iron.

The iron nail produces electric current that attracts the pieces of iron.

The coil rotates which produces electric current that repels the pieces of iron.

Answer:

Combination or Synthesis

Explanation:

It is a combination because 2 reactants are combining together to form the product.

Answer:

So, liquid H2 will be distilled first, after this liquid N2 will be distilled, followed by liquid O2 and liquid CO2 will be distilled last.

The compound will lower molecular weight will distill out first as it will evaporate fast.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

Learn more about compounds,here:

https://brainly.com/question/14117795

#SPJ2

The correct statements are:

The limiting reactant is completely used up in the reaction.

There will be an excess of other reactants at the end of the reaction.

The limiting reactant dictates the amount of product.

Which reactant will be the limiting reactant depends on the molar ratios of all the reactants in the experiment (and the coefficients in the balanced reaction equation), so it will absolutely vary depending on the reaction setup and conditions, which is why it cannot always be the same for a given reaction.

Because the molar ratios of the reactants dictate which of them will be the limiting one, it is not true that the one with the lowest mass will always be the limiting reactant.

You can learn more about limiting reactants here:

brainly.com/question/14225536

#SPJ4

Answer:

need the free questions srry yall

Explanation:

Fatty acids that are broken down for energy productions are utilized for glycolysis.

Although the multiple choices are missing, you might be referring to these multiple choices: (a) Fermentation, (b) Glycolysis, (c) Pyruvate oxidation, (d) Citric acid cycle, (e) Electron transport chain. In that case, the correct answer is (b) Glycolysis.

Glycolysis refers to the breakdown of glucose or sugar (C₆H₁₂O₆), releasing energy and pyruvate (CH₃COCO₂H). Glycolysis is the first stage in the process of cellular respiration in organisms. Cells use glycolysis as a method to produce energy. Glycolysis is found in the great majority of organisms alive today.

Learn more about glycolysis here: https://brainly.com/question/15159050

#SPJ4

The chemical reaction that occurs when the positive ion from one compound replaces the positive ion of the other compound is double replacement

What is a double displacement reaction?

This is a type of reaction in which there is an exchange of ion between the reacting agent. The ion in one of the reactant replaces or displaces the ion in the other reactant to produce two new products.

The reaction between sulphuric acid and potassium hydroxide illustrates a double displacement reaction

H₂SO₄ + 2KOH —> K₂SO₄ + 2H₂O

From the above equation, we can see that K and H exchange to produce K₂SO₄ and H₂O

With the above illustration we can answer the given question as follow

AB + CD = AD + CB

The above reaction is a double displacement reaction since A and C exchange to produce AD and CB

Learn more about double displacement reaction:

https://brainly.com/question/13870042

#SPJ1

Beryllium, the first element in group 2, has an atomic number of 4. The second element in this group has an atomic number of 12.

In the field of chemistry, atomic number can be described as the number of protons that is present in the nucleus of an atom.

The atomic number of Beryllium is 4 as it has 4 protons in its nucleus.

The second member of the group 2 elements in the periodic table is Magnesium. Magnesium has an atomic number of 12 because it has 12 protons in its nucleus.

The atomic number is represented by the letter Z usually. The atomic number is usually mentioned in a periodic table at the top-left.

To learn more about atomic number, click here:

https://brainly.com/question/1805828

#SPJ4

Answer: I think it’s C

Explanation:

I think it’s C because animal cells do not have a cell wall and the cell wall is unique to plant cells

Given the symbol Cl-37, the element is Cl, but there is no information about its charge. When this is like that, it is implicit it is an atom, that is, it is neutral, its charge is 0.

The number indicates is the mass number, so its mass is 37.

So, mass is 37 and charge is 0.

Respiration, which releases the energy in food molecules, usually involves energy and enzymes.

Respiration is the process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide.

Respiration is the major process through which living organisms obtain their energy. They do this by breaking down food ingested.

Cellular respiration combines glucose and oxygen to synthesise carbondioxide and water as products. This process synthesize a large amount of energy, however, it utilizes energy as well.

Therefore, energy and enzymes are used up in the process of cellular respiration.

Learn more about respiration at: https://brainly.com/question/13721588

#SPJ1

The electron configuration for a neutral atom of chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵.

Atomic number of Chlorine  is 17. to write the electronic configuration of chlorine we need to know the number of electrons in chlorine atom. the atomic number of chlorine is 17 therefore there are 17 electrons. the first two electron enter in 1s since s can hold only 2 electrons then next two electron will enter in 2s . the next six electrons will enter in 2p since p can hold six electrons . and next two electron in 3s now reaming 5 will enter in 3p. therefore the  electron configuration for a neutral atom of chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵.

Thus, the  electron configuration for a neutral atom of chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵

To learn more about electronic configuration here

https://brainly.com/question/14283892

#SPJ1

we can solve problems through trial and error

American businessman and inventor Thomas Alva Edison. He created several innovations in the production of electric power, mass communication, sound recording, and motion pictures. Thomas Alva Edison, one of history's most well-known and prolific innovators, made significant contributions to contemporary living by creating the phonograph, motion picture camera, incandescent light bulb, and telephone as well as enhancing the telegraph and telephony. The light bulb was created by Thomas Edison, who is best recognized for this invention. Edison, a brilliant inventor, made a thousand fruitless efforts to create the light bulb. How does it feel to fail 1,000 times, a reporter asked? I didn't fail 1,000 times, Edison said in response.

To know more about thomas edison refer to https://brainly.com/question/13672924

#SPJ4

There are no unpaired electrons present in this atom of oxygen.

The molecular orbital configuration of the oxygen atom given is,

1s²2s²2px²2py².

As we can see, there is not electron in the configuration which is alone in the orbital, they all are present in pairs. So, there are no unpaired electrons present.

This state of the oxygen atom when there are no unpaired electron are present, this could be the ground state of the atom.

The ground state of the atom is when the potential energy of the electrons of the atom is minimum.

In this configuration, no electron is unpaired, all the electrons are paired.

To know more about Molecular configuration, visit,

https://brainly.com/question/28329307

#SPJ4

Dr. Peterson performed an experiment in order to research the growth rate of mice. He had two groups of mice and he fed one group a type of food with added chemical which results in increasing the growth rate and fed same group of food to another batch without adding any chemicals. His research conveyed that chemical A increased the growth rate of mice by approximately 30%. He performed the same experiment 4 times and got the same result every time. Dr. Peterson concluded that the chemical A results in increase of growth rate of mice. The Interpretation of Dr. Peterson's experiment was supported by the evidence received from his experiment. Therefore, option C is correct.

In his experiment, Dr. Peterson found out that chemical A results in increasing the growth rate of mice by 30% and to make sure that the result obtained is valid and evidential, he performed the same experiment 4 times. Since every time the experiment was repeated, the result came out to be same, the closing statement from his experimental study can be accepted because they are backed by evidence.

To learn more about chemicals and experiment,

brainly.com/question/28522480

#SPJ1