Differences in states of matter are determined by

particle type
particle arrangement
particle color
distance between particles

Answer:

Chemical reaction are irreversible. Some of the example of chemical reaction are cooking, rusting, and burning. During a chemical reaction, the composition of substances changes and the particles rearrange to form a new substance. The new substance formed after chemical reaction of substance has different  physical and chemical properties.

When a chemical reaction occur, the atoms or molecules of the substances change its physical and chemical properties such as while cooking of vegetable, the molecules of vegetable undergo changes in their properties and form a new substance which is different from the earlier.

Out of the given choices, C2H4 is an organic compound because it is a hydrocarbon. An organic compound is a chemical compound that contains carbon atoms bonded to other atoms, usually hydrogen, oxygen, and nitrogen, but also sulfur, phosphorus, and other elements.

Organic compounds are the basis of all living organisms and include important molecules such as proteins, nucleic acids, carbohydrates, and lipids. In contrast, H2O2, NaOH, and H2SO4 are inorganic compounds since they do not contain carbon-hydrogen bonds. H2O2 is a peroxide, NaOH is a base, and H2SO4 is an acid. These are important inorganic compounds used in various industries, but they are not organic.

H2O2 is a clear, colorless, and odorless liquid that is commonly used as a disinfectant and bleaching agent. It is an inorganic compound that does not contain carbon-hydrogen bonds, so it is not an organic compound. On the other hand, C2H4 is an organic compound because it is a hydrocarbon with two carbon atoms and four hydrogen atoms. This compound is also known as ethylene and is used in the production of plastics, rubber, and other chemicals.

In conclusion, the organic compound out of the given options is C2H4 (ethylene), while the rest are inorganic compounds.

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The balanced chemical equation for the reaction is as follows:

6 Li[s] + \(N_{2}\)[g] = 2\(Li_{3}\)N[s]

Meaning of the reaction is that 6 moles of lithium reacts with nitrogen to form two moles of lithium nitride.

The product formed is:

Highly flammable and reactive chemical and a Dangerous fire and explosion hazard.

Lithium Nitride can affect you when breathed in and may be absorbed through the skin.

Contact can severely irritate and burn the skin and eyes. Breathing Lithium Nitride can irritate the nose and throat.

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Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.

Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.

They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.

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Answer:

I think the density of the object determines if it floats or sinks

Answer:

Number of energy levels that the element has.

Explanation:

The period number (n) is the outer energy level that is occupied by electrons. The period number that an element is in, is the number of energy levels that the element has.

The rate of reaction in SN2 reaction becomes four times when the the concentration of bromoethane is doubled and the concentration of hydroxide ion doubles.

In SN2 reaction, the rate of reaction is depend on the concentration of both reactant.

For SN2 reaction,

r = k[bromoethane] [hydroxide ion]

r = k [CH3CH2Br] [OH]

When the concentration of bromoethane is doubled and the concentration of hydroxide ion doubles then,

r = k 2×[CH3CH2Br] × 2[OH]

r = 4k[CH3CH2Br] [OH]

Thus, we concluded that the rate of reaction in SN2 reaction becomes four times.

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Answer:

Crystals of copper sulfate can be obtained from the salt solution through a process called crystallization. The steps involved are:

Prepare a saturated solution of copper sulfate by dissolving the salt in water until no more can dissolve.

Heat the solution to evaporate some of the water, which will increase the concentration of the salt.

Allow the solution to cool slowly. As it cools, the solubility of the salt decreases and it will start to form crystals.

Use a filter or strainer to separate the crystals from the remaining liquid. This process is called filtration.

Wash the crystals with a small amount of cold water to remove any impurities that may be present.

Leave the crystals to dry on a filter paper or in a drying oven.

After following these steps, pure crystals of copper sulfate can be obtained from the salt solution.

Explanation:

The total charge on an atom comes from protons and electrons.

The proton is positively charged while the electron is negatively charged. A neutral atom would have an equal number of protons and electrons.

An atom with more protons than electrons will be positively charged while those with more electrons than protons will be negatively charged.

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Answer:

The highlighted words in the explanation.

Explanation:

A clue comes by considering the noble gas elements, the rightmost column of the periodic table. These elements—helium, neon, argon, krypton, xenon, and radon—do not form compounds very easily, which suggests that they are especially stable as lone atoms. What else do the noble gas elements have in common?

The patterns of water use in the USA vary based on different factors such as the geography, climate, and the type of usage

Water usage can cause various problems if not managed properly such as pollution and scarcity.

Some areas in the US have abundant sources of water while others are water-scarce.

Agriculture is the largest water user in the US, followed by municipal and industrial uses. Irrigation is the main water usage in agricultural areas, while urban areas tend to use water for drinking, bathing, and other household purposes.

Excessive water usage can also lead to water scarcity, water pollution, and other environmental problems. Additionally, water usage conflicts can arise between different regions, states, and even countries. Therefore

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The pH of a compound is directly related to the number of carbon atoms and halogens it contains. The more carbon atoms and halogens a compound contains, the more acidic it is.

With the chemical symbol C its atomic number 6, carbon is a group of elements. It has four accessible electrons to create covalent chemical bonds since it is nonmetallic and tetravalent. The periodic table's group 14 includes it. Three isotopes, 12C, 13C, and 14C, are found in nature; 12C and 13C are stable, whereas 14C is a radioactive with a half-life of approximately 5,730 years. One of the few elements still in use today is carbon.

This is because carbon atoms and halogens form polar covalent bonds, which can attract and donate hydrogen ions, making the compound acidic. In addition, halogens are electronegative, meaning that they can draw electrons away from other atoms and form negative ions, further increasing the acidity of the compound.

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In the chemical reaction between Fe(II) ions and dilute sulfuric acid when hydrogen peroxide is added Fe(II) gets converted to Fe(III) ,on retaining mixture and adding NaOH precipitate of ferric hydroxide is obtained.

Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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The combination electrode in the given drawing is made up of a reference electrode and a working electrode.

The working electrode in the given combination electrode is made up of a platinum wire. The platinum wire is coated with platinum black. This is the black substance on the lower part of the platinum wire in the given drawing.

The reference electrode is made up of a silver wire that is coated with silver chloride. A small amount of KCl solution is placed in the tube at the top of the silver wire.

The string that is attached to the combination electrode is used to immerse the electrode in a solution. It is attached to the top of the reference electrode. The string also acts as a support to prevent the combination electrode from sinking into the solution being measured.

The string should be attached to the top of the reference electrode. When the combination electrode is immersed in the solution, the string should be at the top so that the electrode does not sink into the solution being measured.

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Answer:

it is c

Explanation:

because it deals with living organisms and with water

Answer: Yes

Explanation: Barium iodide is an inorganic compound with the formula BaI2. The compound exists as an anhydrous and a hydrate (BaI2(H2O)2), both of which are white solids. When heated, hydrated barium iodide converts to the anhydrous salt. The hydrated form is freely soluble in water, ethanol, and acetone.

Barium iodide is an inorganic compound with the formula BaI2. The compound exists as an anhydrous and a hydrate (BaI2(H2O)2), both of which are white solids. When heated, hydrated barium iodide converts to the anhydrous salt. The hydrated form is freely soluble in water, ethanol, and acetone. so the answer would be yes. I hope this helps :)

1. (A). All weak acids have a pH value that is higher than that of strong acids. Compared to strong acids, which dissociate completely and produce a higher concentration of H+ ions, resulting in a lower pH, weak acids partially dissociate in water, producing hydrogen ions (H+). produce a low concentration of K, leading to a high pH value.

B. All weak bases have a lower pH than strong bases. Compared to strong bases, which dissociate completely and form a higher concentration of OH- ions, weak bases receive fewer hydrogen ions from water, resulting in a lower concentration of hydroxide ions (OH-), As a result of which the pH value is reduced.

2. A. All strong acids are more acidic than weak acids in terms of pH. Compared to weak acids that only partially dissociate in water, strong acids dissociate completely, resulting in a larger concentration of H+ ions and a lower pH value.

B. All strong bases have pH values ​​that are higher than those of weak bases. Compared to weak bases that only partially take up hydrogen ions, strong bases dissociate completely in water, producing a greater concentration of OH-ions and a higher pH value.

3. Hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid (HNO3) are some examples of substances that are listed as strong acids with a pH of 1-2.

4. Among others, sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2) are examples of substances classified as strong bases with a pH of 13–14.

5. Acetic acid (CH3COOH), formic acid (HCOOH), and carbonic acid (H2CO3), among others, can be classified as weak acids with a pH range of 5–6.4.

6. Ammonia (NH3), ammonium hydroxide (NH4OH), and methylamine (CH3NH2), among other substances, can be classified as weak bases with a pH range of 7.5 to 9.

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Answer:

chupapi muano goagaag djdu

The term used to denote the concentration of electrolytes in a given volume is "molarity".

Molarity-

Molarity is the number of moles of solute dissolved in one liter of the solution. Molarity is the most widely used concentration metric in chemistry, and it is frequently denoted by "M." It denotes the amount of solute in moles per liter of solution.

A solution's molarity can be calculated using the following formula:

Molarity = moles of solute / liters of solution

Molarity is often used to express the concentration of a solution's electrolytes because electrolytes break into ions when dissolved in a solvent, allowing for electrical conductivity.

Molarity can be used in other applications, such as stoichiometry, which involves determining how much of one compound is required to react completely with another.

Molarity is a useful tool for solving problems that involve chemical reactions since the number of moles of a substance is frequently used to establish reaction ratios, limit reactants, and determine the theoretical yield.

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The flaw in the representation is likely the absence of an external source of energy, as indicated in (option C). The electrolytic cell requires an external energy supply to drive the thermodynamically unfavorable decomposition of NaCl into Na and Cl₂.

The flaw in the representation can be identified by analyzing the given options:

A. Oxidation is occurring at the anode.

This statement is correct in terms of the electrolytic cell setup. Oxidation does occur at the anode, where chloride ions (Cl-) are oxidized to form chlorine gas (Cl₂).

B. Molten Na is shown at the cathode.

This statement is also correct. In the electrolytic cell, sodium ions (Na+) are reduced at the cathode, resulting in the formation of molten sodium (Na).

C. An external source of energy is not shown.

This statement is the most likely flaw in the representation. The decomposition of NaCl into Na and Cl₂ is an endothermic process, meaning it requires an input of energy from an external source for the reaction to proceed. The representation should include an external power supply or energy source to drive the electrolytic cell.

D. The direction of the electron flow in the wires is incorrect.

Without more specific information or visual representation, it is difficult to determine if the direction of electron flow in the wires is incorrect. This option cannot be confirmed as a flaw based solely on the information provided.

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7.3 mL of NaOH are used to titrate the 10.00 mL aliquot.

The balanced equation for the reaction between NaOH and HCl is:

NaOH(aq) + HCl(aq) → H₂O(l) + NaCl(aq)

To calculate the volume of NaOH used,  determine how much HCl is left after it reacts with the CaCO₃, and then how much NaOH is required to neutralize that remaining HCl.

Step 1: Calculate the moles of HCl used to react with CaCO₃

The balanced equation for the reaction between CaCO₃ and HCl is:

CaCO₃(aq) + 2HCl(aq) → CaCl₂(aq) + H2O(l) + CO₂(g)

From the balanced equation, we can see that 1 mole of CaCO₃ reacts with 2 moles of HCl. Therefore, the number of moles of HCl used to react with the CaCO₃ is:

moles HCl = (7.50 mL)(2.00 mol/L) = 0.015 mol

Step 2: Calculate the concentration of HCl in the 125.0 mL solution

Started with 7.50 mL of 2.00 M HCl, which is equivalent to 0.015 moles of HCl. We added enough water to make a 125.0 mL solution, so the concentration of HCl in the solution is:

C = moles of HCl / volume of solution in L

C = 0.015 mol / 0.125 L = 0.12 M

Step 3: Calculate the moles of HCl remaining in the 10.00 mL aliquot

moles NaOH = moles HCl remaining in aliquot

(C of NaOH)(volume of NaOH) = (C of HCl)(moles of HCl remaining in aliquot)

(0.058 mol/L)(volume of NaOH) = (0.12 mol/L)(moles of HCl remaining in 10.00 mL aliquot)

moles of HCl remaining in 10.00 mL aliquot = moles of HCl in 125.0 mL solution - moles of HCl used to react with CaCO₃

moles of HCl remaining in 10.00 mL aliquot = (0.12 mol/L)(0.125 L) - 0.015 mol = 0.0035 mol

Substituting this into the equation gives:

(0.058 mol/L)(volume of NaOH) = (0.12 mol/L)(0.0035 mol)

volume of NaOH = (0.12 mol/L)(0.0035 mol) / (0.058 mol/L) = 0.0073 L

Step 4: Convert the volume of NaOH to mL

volume of NaOH = 0.0073 L x (1000 mL / 1 L) = 7.3 mL

Therefore, 7.3 mL of NaOH are used to titrate the 10.00 mL aliquot.

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Answer:

It will explode, I have plenty of research on this. Let me know if you want the sources. :)

Explanation:

Answer:

Explanation:

There will be no reaction when carbon tetrachloride is added to water.  This is because the two substances do not mix.  It is not due to density difference (like the case of Mercury and water) but rather carbon tetrachloride is non-polar while water is polar.  So they will separate and form two different layers with no reaction happening.

Rate = constant x [H₂][I₂] is rate law.

You have a three-step system with just one slow step and two quick steps.

Since each of the equilibria holds throughout the reaction, it may be assumed that the first two steps—which are in reality equilibria—occur quickly.

So, the following equation for the equilibrium constant at each phase is appropriate:

\(K_{1} =\frac{[I]^{2} }{[I_{2}] }\)  and \(K_{2} =\frac{[H_{2} I]}{[H_{2}][I] }\)

[I] = \(\sqrt{[K_{1}] }[I_{2} ]\) and  [H₂I] = \(K_{2}\)[H₂][I] = \(K_{2} [H_{2} ]\sqrt{K_{1} } [I_{2} ]\)

The pace of production of the product (which is the rate of the total reaction) only depends on the final phase because only that step is sluggish.

Rate = \(\frac{1}{2} \frac{d[HI]}{dt} =k_{s}[H_{2} I] [I]\)

The rate constant \(k_{s}\) of the final slow step is used here.

Hence, rate = constant x [H₂][I₂] is rate law.

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The direction in which the proteins migrate during electrophoretic separation of serum proteins at pH 8.6 is determined by their net charge.

The migration of proteins during electrophoresis is determined by their net charge, which is influenced by the pH of the surrounding medium. At pH 8.6, which is relatively alkaline, the proteins in serum typically carry a net negative charge.

In an electric field, proteins with a net negative charge will migrate towards the positively charged electrode (anode) because oppositely charged particles are attracted to each other.

Therefore, in electrophoretic separation of serum proteins at pH 8.6, the proteins will migrate towards the anode, moving in the direction opposite to the migration of the negatively charged ions present in the buffer solution.

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amount of time the two substances are in contact. area in contact between the two substances. specific heat of the material that makes up the substances. the density of the two substances in contact.

The characteristics determine how easily two substances change temperature is amount of time the two substances are in contact, area of contact between the two substances, specific heat of the material that makes up the substances and the density of the two substances in contact. Therefore, option B, C, D and E are correct.

When two substances that have different surface temperatures come in contact, conduction happens. The substance with the higher temperature always transfers energy to the one with the lower temperature.

When two objects with different temperatures come in contact with one another, energy moves from the hotter (higher temperature) object to the cooler (lower temperature) object until both objects reach the same temperature.

The latitude of the location has an impact on the air temperature there. The location's elevation. separation from the ocean.

Thus, option B, C, D and E are correct.

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