4. Identify What do scientists call a substance that forms during a chemical reaction?
5. Identify On what side of the equation are reactants found?

(CH₃)₂CO, also known as acetone, is a liquid at room temperature and has a surface tension of 23.8 mN/m.

Surface tension is defined as the tendency of the surface of a liquid to behave like an elastic sheet. The substances with the lowest surface tension are those that tend to spread out to a greater extent on the surface rather than to form a droplet.

Out of the given substances, the one with the lowest surface tension is (e) (CH₃)₂CO, which is acetone.

A) CH₃OH, also known as methanol, is a liquid at room temperature and has a surface tension of 22.6 mN/m.

B) CH₃CH₂CH₂CH₃, also known as butane, is a gas at room temperature and therefore does not have a surface tension value.

C) C₆H₁₄, also known as hexane, is a liquid at room temperature and has a surface tension of 18.4 mN/m.

D) H₂O, also known as water, is a liquid at room temperature and has a surface tension of 71.97 mN/m.

E) (CH₃)₂CO, also known as acetone, is a liquid at room temperature and has a surface tension of 23.8 mN/m.

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Answer:

I believe it would be Asteroid Belt

Explanation:

little green men and imposters seem very unlikely, and Pluto is definetely not between earth and Jupiter

Answer:

the asteroid belt

Explanation:

it orbits between mars and jupiter

The mixing of colored light and colored paint follows different color models and produces different outcomes due to the properties of light and pigments.

Mixing colored light and mixing colored paint are not the same. When mixing colored light, such as using equipment in a lab, the primary colors are red, green, and blue (RGB). By combining different intensities of these colors, you can create various shades and hues. Mixing all three primary colors at full intensity produces white light.

On the other hand, mixing colored paint involves using the subtractive color model. The primary colors are cyan, magenta, and yellow (CMY). When you mix paints, the pigments absorb certain wavelengths of light, and the reflected light determines the perceived color. Mixing all three primary colors in paint results in a dark, muddy color, not white.

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Explanation:

The terms ‘sand’ and ‘soil’ are often interchanged and used synonymously with one another. Many people consider them the same, but when scrutinized, they are quite different from each other. First and foremost, sand is a type of soil–so is silt, clay, peat, and loam. These types of soils are generated when rocks break up into their constituent parts and are acted upon by outside forces, such as wind, water, and natural salts. The broad definition of soil refers to the loose layer of earth that covers the surface of the planet. Sand, on the other hand, is defined as loose material that consists of rocks or mineral grains.

Answer:

soil is defined as the top layer of the land surface of the earth that is composed of disintegrated rock particles, humus, water, and air.

sand is defined as a loose material that consists of rocks or mineral grains.

Explanation:

Answer:

Protons / H+ ions

Explanation:

The acids are compounds with a pH range between 1-7, while the base has a pH range of 7-14. Acids produce hydrogen ions or protons in the solution.

The pH can be defined as the hydrogen ion concentration in the solution. The higher the proton concentration in the solution, the lower will be the pH.

The pH of 7 has an equal number of hydrogen and hydroxide ions contributing to the neutral pH. The alkaline pH is contributed by the hydroxide ion concentration.

The acids fall at the lower pH range with a high hydrogen ion concentration. Thus, acids produce hydrogen ions or protons in the aqueous solution.

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Answer:

e. Hydrogen bonds form between the molecule and water.

Explanation:

When a molecule dissolves in water, it is typically because the molecule has polar or charged regions that can interact with the polar water molecules. Water is a highly polar molecule due to its bent shape and the presence of electronegative oxygen atoms. As a result, it forms hydrogen bonds with other water molecules and with other polar or charged substances.

When a molecule dissolves in water, the water molecules surround the individual molecules and interact with them through hydrogen bonding. The positively charged hydrogen atoms of water form hydrogen bonds with negatively charged regions of the dissolved molecule, such as oxygen or nitrogen atoms, or with partially negative regions due to uneven distribution of electron density. This interaction between the water molecules and the dissolved molecule is what allows the molecule to become dispersed and solvated in the water, forming a homogeneous mixture.

It's important to note that during the dissolution process, the covalent bonds within both the water molecules and the dissolved molecule generally remain intact. Dissolving in water does not typically involve breaking the covalent bonds within the molecule or the water molecule. Instead, it involves the formation of hydrogen bonds between the solvent (water) and solute (dissolved molecule).

Answer:

The answer should be 40.3044 g/mol

Answer:

it is a practical question..ASAP

The required answer for the molar solubility of BaSO4 in a 0.250 M solution of NaHSO4 is 1.05 × 10-5 M.

Explanation: Molar solubility is defined as the number of moles of a solute that can dissolve per liter of solution before the solution becomes saturated. It can be determined by calculating the equilibrium concentration of the solute using the solubility product expression for the given ionic compound, BaSO4. We are given the concentration of NaHSO4 and the acid dissociation constant for HSO4-.

The balanced chemical equation is:BaSO4(s) ↔ Ba2+(aq) + SO42-(aq)We are assuming the solution is dilute and that the ionic strength is low. Therefore, we can simplify the expression for the solubility product to:Ksp = [Ba2+][SO42-]The expression for the acid dissociation constant of HSO4- is:Ka = [H+][SO42-]/[HSO4-]

The first step is to calculate the concentration of HSO4-. We can use the equilibrium expression for the acid dissociation reaction to solve for [HSO4-]:Ka = [H+][SO42-]/[HSO4-]Rearranging the expression and solving for [HSO4-]:[HSO4-] = [H+][SO42-]/Ka[HSO4-] = (0.250 × x)/(1.2 × 10-2)[HSO4-] = 20.8333 × xThe molar solubility of BaSO4 in a 0.250 M solution of NaHSO4 is x. At equilibrium, the concentration of Ba2+ and SO42- are both x. Using the solubility product expression:Ksp = [Ba2+][SO42-]Ksp = x2x = sqrt(Ksp)[BaSO4] = x = sqrt(Ksp) = sqrt(1.1 × 10-10) = 1.05 × 10-5 MTherefore, the molar solubility of BaSO4 in a 0.250 M solution of NaHSO4 is 1.05 × 10-5 M.

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The rate law for the reaction is `rate = k[NH4][NO2]` and the rate constant is `k = 0.004 M^-2 s^-1`.

The rate law for the reaction:

`NH4NO2 -> N2 + 2H2O` is `rate = k[NH4NO2]`.

Given that the reaction is first order with respect to both NH4 and NO2, it can be written as `rate = k[NH4][NO2]`. The rate constant k is calculated by plugging in the rate data from the experiment and solving for k.

Example of how to solve for the rate constant k:

Suppose the following rate data was obtained in an experiment where the concentration of NH4 and NO2 were varied:| Experiment | [NH4] (M) | [NO2] (M) | Rate (M/s) || 1 | 0.1 | 0.2 | 4.0x10^-4 || 2 | 0.2 | 0.2 | 8.0x10^-4 || 3 | 0.2 | 0.1 | 4.0x10^-4 |Substituting the given data into the rate law:

Experiment 1: 4.0x10^-4 = k(0.1 M)(0.2 M) = 0.002 k

Experiment 2: 8.0x10^-4 = k(0.2 M)(0.2 M) = 0.008 k

Experiment 3: 4.0x10^-4 = k(0.2 M)(0.1 M) = 0.002 k

Taking the average of the three k values:

k = (0.002 + 0.008 + 0.002)/3 = 0.004 M^-2 s^-1

Therefore, the rate law for the reaction is `rate = k[NH4][NO2]` and the rate constant is `k = 0.004 M^-2 s^-1`.

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The redox reactions that occur spontaneously in the forward direction are:

2Ag+(aq) + Ni(s) → 2Ag(s) + Ni2+(aq)

Ca2+(aq) + Zn(s) → Ca(s) + Zn2+(aq)

Among the given redox reactions, the ones that occur spontaneously in the forward direction are: 2Ag+(aq) + Ni(s) → 2Ag(s) + Ni2+(aq) and Ca2+(aq) + Zn(s) → Ca(s) + Zn2+(aq). These reactions occur because the reduction potentials of Ag+ and Ca2+ are higher than those of Ni2+ and Zn2+, respectively. As a result, Ag+ and Ca2+ are reduced, while Ni and Zn are oxidized. The other two reactions, 2Cr(s) + 3Pb2+(aq) → 2Cr3+(aq) + 3Pb(s) and Sn(s) + Mn2+(aq) → Sn2+(aq) + Mn(s), do not occur spontaneously in the forward direction due to the lower reduction potentials of the species being reduced.

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Answer:

Decomposition Reaction

Explanation:

Ba(NO₃)₂(s) ⇒ BaO(s) + N₂(g) + 3 O₂(g)

Barium nitrate decomposes into the chemical species that were used to create it.

The statement about members of a homologous series that is true is that they differ from their nearest neighbors by 14 amu (c).

A homologous series is a group of compounds with a similar general formula, chemical properties, and a constant increment in molecular structure. As a result, each member varies from the previous by a constant unit, which is often a CH2 group.Each member of the homologous series is classified as either a tautomer or a constitutional isomer. Constitutional isomers, also known as structural isomers, are compounds with the same molecular formula but different structural arrangements. Isomers of tautomers are structural isomers that interconvert by a simple chemical reaction. As a result, the formula and composition of tautomers are the same, but they differ in the distribution of their valence electrons and bonding patterns.Members of a homologous series may or may not be hydrocarbons, and they are not always constitutional isomers. Therefore, statement (a) and statement (b) are both incorrect. Statement (d) is also incorrect because tautomers cannot be classified as members of a homologous series. However, statement (c) is correct because members of a homologous series differ from their nearest neighbors by a constant increment in molecular structure, which is usually 14 amu. Therefore, the correct answer is C.

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2. The phase changes that will occur from 100 to 500 °C at 1 atm of pressure are sublimation followed by deposition.

Based on the information provided, the correct answer is:

2. sublimation, followed by deposition

Following the dashed line at 1 atm of pressure on the phase diagram from 100 to 500 °C, the phase changes that will occur are sublimation, followed by deposition.

At lower temperatures, the substance will undergo sublimation, transitioning directly from the solid phase to the gas phase. As the temperature increases, the substance will exist as a gas.

However, at higher temperatures, as the temperature decreases again, the gas will undergo deposition, transitioning directly from the gas phase back to the solid phase.

Therefore, the substance will experience sublimation and deposition as the temperature changes within the specified range, without undergoing melting or vaporization.

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"A reaction which is endothermic and has an overall increase in entropy is spontaneous only at high T" is incorrect.

"A reaction which is endothermic and has an overall increase in entropy is spontaneous only at high T" is false.A spontaneous process occurs naturally and without any assistance. The rate of the process does not affect its spontaneity; instead, spontaneity is determined by the change in free energy that occurs during the reaction.A reaction is spontaneous if the Gibbs free energy of the reaction is negative (∆G < 0). Gibbs free energy is calculated using the equation: ∆G = ∆H - T∆S, where ∆H is the enthalpy change, T is the temperature, and ∆S is the entropy change of the reaction.A reaction that is endothermic (∆H > 0) and has an increase in entropy (∆S > 0) can be spontaneous at any temperature if the free energy change is negative. As a result, the given statement "A reaction which is endothermic and has an overall increase in entropy is spontaneous only at high T" is incorrect.

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The element that is oxidized in the reaction Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2(g) is iron (Fe). When determining the oxidation state of iron (Fe), we use the rule that the oxidation state of a monatomic ion is equal to its charge.

The oxidation state of Fe in Fe(CO)5 is zero. In Fe(CO)4I2, the oxidation state of Fe is +2. So, Fe is oxidized in the reaction.Balancing the redox reaction:Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2(g)The oxidation half-reaction is:Fe(CO)5 (l) → Fe(CO)4I2 (s) + I- (aq)The reduction half-reaction is:2H+ (aq) + 2e- → H2 (g)By adding both half-reactions, the balanced redox reaction is:Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2(g)The oxidation half-reaction shows that iron (Fe) has lost electrons, thereby being oxidized.

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Answer:

it will decrease because there will not be food for all of them and there is very little space for them now so if there is more they will start to fight

Explanation:

there is very little habitat left for panda bears so if there population increases the food and space with be filed

Hello! jamilialves888

I'm glad you asked my name is ✰Tobie✰

And I will help you understand why the population of ⚝pandas ⚝

is decreasing .

-Your answer :βy Tobie

≛So why are pandas going extinct?

One of the main cause is due to the destruction of their own habitat

Since china is a country that is constantly growing their own homes are slowly   being destroyed Since their habitats are becoming destroyed it forces them to live in small unhabitable area .

≛This leads to another problem.....

If they are forced to live in a small area there will be less food...

Since there is a shortage of food that will leave the panda's to slowly starve to death since pandas only eat bamboo they could never be able to live anywhere else....Another reason panda's are going extinct is because they are being hunted for their fur.

ex·tinct

/ikˈstiNG(k)t/

_____________

It means that the species does not exist anymore and

are no longer in existence

Hope this helps!

                                                                                             -Tobie <3

ʕ •ᴥ•ʔ

Answer:

[tex][H^+]=3.16x10^{-4}M[/tex]

Explanation:

¡Hola!

En este caso, dado que el pH de una solución se entiende como el potencial de los iones hidrógeno en la misma, es posible recordar la ecuación que se usa para calcularlo:

[tex]pH=-log([H^+])[/tex]

De este modo, al conocer el pH, se resuelve para la concentración de iones hidrógeno como se muestra a continuación:

[tex][H^+]=10^{-pH}[/tex]

Así, reemplazamos el pH para obtener:

[tex][H^+]=10^{-3.5}=3.16x10^{-4}M[/tex]

¡Saludos!

Answer:

Potassium

Explanation:

Most reactive metal in the reactivity series

The element in the question is referred to the alkali metal which is known as Potassium

Potassium is a highly reactive metal and reacts with Hydrochloric acid to

form a salt known as Potassium chloride and hydrogen gas.

Hcl + K ⇒ Kcl₍s₎ + H₂₍g₎

Potassium has a white color but when it reacts with water it explodes and

gives out a purple-red color as a result of the high excitation of electrons.

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Answer: 5.39

Explanation: you are adding the balloon's volume and the container's volume

Answer:

Global warming stresses ecosystems through temperature rises, water shortages, increased fire threats, drought, weed and pest invasions, intense storm damage and salt invasion, just to name a few.

Explanation:

Global warming stresses ecosystems through temperature rises, water shortages, increased fire threats, drought, weed and pest invasions, intense storm damage and salt invasion, just to name a few.

The correct answer  is:Ba getting oxidized/H getting reduced.

Explanation:  In the following reaction, Ba is getting oxidized and H is getting reduced. Given reaction is: Ba(s) + 2H+ (aq) → Ba2+ (aq) + H2(g)In the given redox reaction, the Ba is being oxidized to Ba2+. Its oxidation state is increasing from 0 to +2. This means that Ba is losing electrons and getting oxidized. Hence, Ba is the element that is getting oxidized in the given reaction.The H+ is getting reduced to H2. Its oxidation state is decreasing from +1 to 0. This means that H is gaining electrons and getting reduced. Hence, H is the element that is getting reduced in the given reaction.Therefore, the correct option is:Ba getting oxidized/H getting reduced.

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Answer : The substance that acts as the oxidizing agent in the reaction:Fe(CO)5(l) + 2HI(g) → Fe(CO)4I2(s) + CO(g) + H2(g)is HI, or hydrogen iodide.

Explanation : In this reaction, HI acts as an oxidizing agent and Fe(CO)5(l) acts as a reducing agent.What is an oxidizing agent?An oxidizing agent is a substance that oxidizes or causes oxidation in another compound by transferring electrons to that compound. In the process, the oxidizing agent itself gets reduced.Oxidizing agents are chemicals that accept electrons from other substances. They are generally characterized by their ability to oxidize another substance, which is why they are sometimes referred to as electron acceptors.

Examples of oxidizing agents include hydrogen peroxide, potassium permanganate, and sodium hypochlorite.

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Answer:

7.97 moles of neon are present in the canister.

Explanation:

Avogadro's constant or "Avogadro's number" is the number of constituent particles found in the amount of substance in one mole.

In other words, Avogadro's number is the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.

So, you can apply the following rule of three: if 6.023*10²³ atoms are present in 1 mole, 4.8*10²⁴ atoms are present in how many moles?

[tex]amount of moles=\frac{4.8*10^{24}atoms*1 mole }{6.023*10^{23}atoms}[/tex]

amount of moles= 7.97 moles

7.97 moles of neon are present in the canister.

Answer:

-411 kj

Explanation:

We solve by using this formula

∆U = ∆Q + ∆W

This formula is the first law of thermodynamics

Change in internal energy U = +241

Heat gained by system Q = 652

Putting the value into the equation

+241 = 652 + W

Workdone = 241 - 652

Workdone = -411 kj

Since work done is negative it means that work was done by the system

The correct statement (e) captures the fundamental principle of the second law of thermodynamics, emphasizing the tendency of entropy to increase in spontaneous processes, leading to a positive net entropy change of the universe.

The second law of thermodynamics is a fundamental principle that describes the behavior of energy and entropy in physical systems. It can be stated in various ways, but the correct statement corresponding to the second law is: In any spontaneous process, ΔS universe - ΔS system + ΔS surroundings > 0.

This statement captures the essence of the second law, which is that the entropy of an isolated system tends to increase over time. The entropy change of the universe (ΔS universe) is the net change in entropy of the system and its surroundings. For a spontaneous process, where the system undergoes a change without external intervention, the total entropy change of the universe must be greater than zero.

The entropy change of the system (ΔS system) and the entropy change of the surroundings (ΔS surroundings) may have opposite signs, but their magnitudes must be such that the net entropy change of the universe is positive. This reflects the irreversibility of natural processes, where entropy tends to increase and energy becomes more dispersed. The correct statement (e) captures the fundamental principle of the second law of thermodynamics, emphasizing the tendency of entropy to increase in spontaneous processes, leading to a positive net entropy change of the universe.

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Answer:

81.5g/mol

Explanation:

Molar mass is the ratio between mass of a substance (In this case, 0.207g) and moles presents in this mass.

To solve this question we must find the moles of the gas in order to obtain the molar mass using:

PV = nRT

PV / RT = n

Where P is pressure = 0.980atm

V is volume in Liters = 0.0725L

R is gas constant = 0.082atmL/molK

T is absolute temperature = 68°C + 273.15 = 341.15K

0.980atm*0.0725L / 0.082atmL/molK*341.15K = n

2.54x10⁻³ moles = n

Thus, the molar mass of the gas is:

0.207g / 2.54x10⁻³ moles

Answer:

Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.

Explanation:

Plss markk mee brainlistt

The standard molar entropy of no₂ is 240.0 J/(mol.K).Therefore, the order of increasing standard molar entropy of the given gases is n₂o₄ (g) < no (g) < no₂ (g).

Entropy is the measure of disorder in a system. It is a thermodynamic property that depends on the degree of randomness in the molecules of a substance. The unit of entropy is Joules per Kelvin. In general, the entropy of a substance increases with an increase in temperature.

This is because at higher temperatures, the molecules of a substance have more kinetic energy and can move more freely, leading to an increase in the number of possible arrangements of molecules, which increases entropy.

Increasing Standard Molar Entropy Order n₂o₄ (g) < no (g) < no₂ (g)The standard molar entropy (S°) is the entropy of one mole of a substance at standard temperature and pressure (STP). In the order of increasing standard molar entropy, the gases listed are as follows: n₂o₄ (g) has the least entropy because it is a relatively heavy and rigid molecule. It has fewer possible arrangements of molecules, which results in a lower entropy.

The standard molar entropy of n₂o₄ is 304.3 J/(mol.K).no (g) has more entropy than n₂o₄ because it is a lighter molecule that is more mobile. It has more possible arrangements of molecules, leading to higher entropy.

The standard molar entropy of no is 210.6 J/(mol.K).no₂ (g) has the highest entropy because it is the lightest and most mobile molecule of the three gases. It has the most possible arrangements of molecules, leading to the highest entropy. The standard molar entropy of no₂ is 240.0 J/(mol.K).

Therefore, the order of increasing standard molar entropy of the given gases is n₂o₄ (g) < no (g) < no₂ (g).

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