15. In complete sentences, describe how electronegativity is related to polarity.

Answer:

Al(OH)3 + HNO3 = Al(NO3)3 + H2O - Chemical Equation Balancer.

Explanation:

Answer: The newly occupied volume is 11.46 L

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

\(P\propto \frac{1}{V}\)     (At constant temperature and number of moles)

\(P_1V_1=P_2V_2\)  

where,

\(P_1\) = initial pressure of gas  = 0.999 atm

\(P_2\) = final pressure of gas = 0.802 atm

\(V_1\) = initial volume of gas  = \(9.20 L\)

\(V_2\) = final volume of gas  = ?

\(0.999\times 9.20=0.802\times V_2\)  

\(V_2=11.46L\)

Therefore, the newly occupied volume is 11.46 L

The concentration of the hydronium ion, [H3O+], is low and is equal to 10^-9.2.

Concentration is the ability to focus one's attention on a particular task or thought without being distracted by other things. It is the act of deliberately focusing on one thing at a time and is essential for many tasks such as studying, problem-solving, and decision-making. Concentration requires practice and can be developed by engaging in activities such as mindfulness, breathing exercises, and other relaxation techniques.

a. This solution is basic.

b. The concentration of the hydronium ion, [H3O+], is low and is equal to 10^-9.2. This is because the pH of a solution is equal to -log[H3O+]. Therefore, a pH of 9.2 indicates that the [H3O+] is equal to 10^-9.2.

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Explanation:

Kẽm tác dụng với axit clorua ( nhiệt độ ) thì sẽ tạo ra Kẽm II clorua và có khí Hidro bay lên

Answer: \(Pb(NO_3)_2(aq)+2NH_4Cl(aq)\rightarrow PbCl_2(s)+2NH_4NO_3(aq)\) .

The insoluble product is lead (II) chloride.

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.  

The balanced chemical equation is:

\(Pb(NO_3)_2(aq)+2NH_4Cl(aq)\rightarrow PbCl_2(s)+2NH_4NO_3(aq)\)

The insoluble product is lead (II) chloride.

Answer:

Gases have more kinetic energy than liquids

Explanation:

Gases have more kinetic energy than liquids. Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience intermolecular forces.

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The given statement “Shorter product life cycles have led to increased demand uncertainty and difficulty in forecasting” is true because shorter product life cycles have led to increased demand uncertainty and difficulty in forecasting. It is becoming more difficult to predict demand, and there is a higher probability of product failure than there was in the past.

There are several factors responsible for this increased demand uncertainty and difficulty in forecasting. One of the most significant factors is the decrease in product life cycle length. Shorter product life cycles imply that new items and designs are being introduced on a more frequent basis.Product life cycles are the stages that a product passes through from conception to eventual obsolescence. It starts with the development of the product and continues until the product is no longer in use. It includes the introduction stage, growth stage, maturity stage, and decline stage.A product's life cycle has an impact on supply chain management since it has a significant impact on demand forecasting. As a result, any adjustments in demand forecasts must be accompanied by adjustments in supply chains. In a nutshell, shorter product life cycles have resulted in increased demand uncertainty and difficulty in forecasting, making it more challenging to manage supply chains effectively.

So, shorter product life cycles have led to increased demand uncertainty and difficulty in forecasting is true.

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Answer:

380 mL

Explanation:

A chemist must prepare 925 mL of 325 mM aqueous copper(II) sulfate working solution. He'll do this by pouring out some 0.792 M aqueous copper(II) sulfate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the copper(II) sulfate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits.

Step 1: Given data

Step 2: Convert "C₂" to M

We will use the conversion factor 1 M = 1000 mM.

325 mM × (1 M/1000 mM) = 0.325 M

Step 3: Calculate the inital volume

We will use the dilution rule.

C₁ × V₁ = C₂ × V₂

V₁ = C₂ × V₂/C₁

V₁ = 0.325 M × 925 mL/0.792 M

V₁ = 380 mL

The equilibrium will shift to the right when the amount of CuO is increased. This is because increasing the amount of CuO will cause the reaction to produce more products in order to reach a new state of equilibrium. This is known as an "equilibrium shift" and is a common occurrence in chemical reactions.

In this case, the equilibrium shift will cause the reaction to produce more Cu and H2O in order to reach a new state of equilibrium. This shift is represented by the following equation:

CuO(s) + H2(g) = Cu(s) + H2O(g)

As the amount of CuO is increased, the reaction will shift to the right in order to produce more Cu and H2O. This shift will continue until a new state of equilibrium is reached, at which point the reaction will no longer shift in either direction.

In conclusion, the correct answer is A. The equilibrium shifts to the right when the amount of CuO is increased.

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Answer:

Explanation:

At three-quarters of a teaspoon of baking soda, the cookie's texture becomes fragile like that of a soda cracker, with a deeply roasted flavor that distracts from the ginger.

The scientific question that can be answered through investigation will be:

"Which of the four types of macromolecules, and in which proportions, are present in the food sample?"

A scientific question is a question that may lead to a hypothesis and help us in. answering (or figuring out) the reason for some observation.

A scientific question simply means a question where a researcher designs a question in order to get an answer to a particular investigation.

According to this question,

Since the researcher wants to know the person responsible for the classroom good mess by determining which macromolecules are present in the mystery food sample, then the question will be "Which of the four types of macromolecules, and in which proportions, are present in the food sample?"

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The number of electrons, protons, and neutrons in argon is 18, 18 , and 22 respectively, the number of electrons , protons and neutrons in sulphur-32 is 16, 16, 16 respectively. The number of protons, neutrons, and electrons are 6 , 8 and 6. And for uranium-238 , 92 protons , 92 electrons and 146 neutrons.

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Scope 1 emission covers direct emissions from owned or controlled sources. Scope 2 emission covers indirect emissions consumed by the reporting company. Scope 3 emission includes all other indirect emissions that occur in a company’s value chain.

The scopes of emission relates who owns those emissions and the level of control applicable to changing those emission levels at each stage. Scope 1 and 2 emissions are a mandatory part of reporting for many organizations across the world and relate to systems that are within reasonable control of an entity such as onsite and purchased energy. Scope 3 emissions are centered on sources of emissions that are more external to a specific organization such as those across the supply chain. This explains the scopes of emission.

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Answer:

Essentially, scope 1 and 2 are those emissions that are owned or controlled by a company, whereas scope 3 emissions are a consequence of the activities of the company but occur from sources not owned or controlled by it.

Explanation:

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The given statement "Carbon in the ocean originates from the atmosphere" is true because Carbon is one of the most vital elements on Earth and is involved in various biogeochemical cycles, including the carbon cycle.

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The correct question would be as

Carbon in the ocean originates from the atmosphere. Please select the best answer from the choices provided. True or False

The four fundamental forces in the universe are:

Electromagnetic force

Strong Nuclear force

Weak Nuclear force

Anti-gravitational force

Forces refers to any agent which causes a change in the motion or state of rest of a body.

Forces are also described as push or pull agents that change the motion or position of a body when that are applied to that body.

There are four fundamental forces in the universe and they are given below as follows:

Electromagnetic force:

Strong Nuclear force:

Weak force

Anti-gravitational force

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Answer:

8 and 0

Explanation:

8 and 0 together make 80

Litmus is an example of an indicator, a substance that changes color depending on its pH (pH is a measure of the concentration of protons, or H+ ions). In the Titration Gizmo™, you will use indicators to show how acids are neutralized by bases, and vice versa.

To begin, check that 1.00 M NaOH is selected for the Burette, Mystery HBr is selected for the Flask, and Bromthymol blue is selected for the Indicator.

Calculate: Concentration is measured by molarity (M), or moles per liter. Brackets are also used to symbolize molarity. For example, if 0.6 moles of HNO3 are dissolved in a liter of water, you would say [HNO3] = 0.6 M.

Because HNO3 is a strong acid, it dissociates almost completely in water. That means the concentration of H+ is very nearly equal to that of HNO3.What is [H+] if [HNO3] is 0.01 M? 0.01 M

The pH of a solution is equal to the negative log of H+ concentration: pH = –log[H+]

Describe: The equation for the reaction of nitric acid (HNO3) and sodium hydroxide (NaOH) is shown on the bottom right of the Gizmo.

Measure: A titration can be used to determine the concentration of an acid or base by measuring the amount of a solution with a known concentration, called the titrant, which reacts completely with a solution of unknown concentration, called the analyte. The point at which this occurs is called the equivalence point.

Explain: A titration curve is a graph of pH vs. volume of titrant. The graph at right shows a typical titration curve for the titration of a strong acid by a strong base. (A strong base is one that has relatively high dissociation in water.)

According to theBrønsted-Lowry definition, an acid is a substance that is capable of donating a proton to another substance. A base is a substance that accepts protons. When an acid and a base are combined, the acid is neutralized as the base accepts the protons produced by the acid.One way to determine if a solution is acidic or basic is to use litmus paper, as shown above. There are two types of litmus papers: red and blue.How does litmus paper indicate an acid? Both strips turn red.

Answer:

Explanation:

I ) Oxide that dissolves in water to give a solution of pH greater than 7 - Na₂O

It is a metallic oxide and therefore basic in nature . It will dissolve in water to give pH more than 7 .

II )

Acidic oxide insoluble in water  - SiO₂ . It reacts with CaO to give CaSiO₃

III ) NO₂

Acid anhydride : SiO₂  It is anhydride of H₂SiO₃  ( H₂O + SiO₂ )

IV ) No effect on moist paper -  CO . It is neutral oxide .

V ) Peroxide - Ba O₂

VI ) Amphoteric - ZnO

The combustion reaction is the process by which a chemical substance or hydrocarbon reacts with oxygen to produce carbon dioxide and water while also releasing energy in the form of light and heat.

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When chlorine gas is bubbled through an acidified solution of potassium permanganate, a chemical reaction occurs, resulting in the formation of chlorate ions as one of the products.

The potassium permanganate acts as an oxidizing agent, while the chlorine gas acts as a reducing agent. The acidified solution helps to facilitate the reaction by providing a suitable environment for the chemical reaction to take place. Chlorine gas is highly reactive and can undergo oxidation and reduction reactions, making it a useful chemical in many industrial applications. In this particular reaction, it reacts with the potassium permanganate to form chlorate ion, which has its own range of applications in various industries, including the manufacture of fertilizers, herbicides, and explosives. Overall, the reaction between chlorine gas and an acidified solution of potassium permanganate is a useful chemical process that has many industrial applications. It highlights the importance of understanding the properties of different chemicals and how they can be used in various processes to create new products.

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Webb should classify the yellow solid as a nonmetal.

The non-metаls аre elements on the right of the periodic tаble. Non-metаls cаn be gаses, liquids or solids. Non-metаls аre dull in colour, not shiny like metаls. We cаn't hаmmer or shаpe а non-metаl; it will just shаtter if you hit it. Sulphur is аn exаmple of а non-metаl. It's yellow аnd shаtters if you hit it with а hаmmer. Non-metаls don't conduct electricity well: they аre insulаtors. There is one exception: grаphite is а non-metаl which cаn conduct electricity.

Thus, Webb is testing sulphur. Because sulphur is a dull and yellow solid that breaks into powdery pieces when he hits it with a hammer.

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Answer: Example: The water in a species envirmoent suddenly becomes more acid therefore, the species adapts it's body to become more resistent and tolerate to chemicals.

This might also give it an adavantage to the species who have not yet adapted to the change

Explanation: There are three type of adaptions. 1) Structural 2) Behavioral 3) Physiological

Using the given mass of the compound (0.520 g) and the calculated moles, we can determine the molar mass of the compound.

To find the molar mass of the compound, we can use the formula:

ΔT = Kf * m

where ΔT is the freezing point depression, Kf is the cryoscopic constant (in this case, 3.90 °C/m), and m is the molality of the solution.

First, we need to calculate the molality (m) of the solution:

m = moles of solute / mass of solvent (in kg)

The mass of the solvent (lauric acid) is given as 4.62 g. Since the unknown compound is a solute, we need to convert its mass to moles:

moles = mass / molar mass

Given that the mass of the unknown compound is 0.520 g, we can now calculate the moles of the compound.

Next, we convert the mass of the solvent to kg by dividing by 1000:

mass of solvent (lauric acid) = 4.62 g / 1000 = 0.00462 kg

Now we can calculate the molality:

m = moles of solute / mass of solvent = (moles of the compound) / (mass of solvent)

Finally, we can use the freezing point depression formula to find the molar mass of the compound:

ΔT = Kf * m

Substituting the given values:

4.20 °C = 3.90 °C/m * m

Now solve for m:

m = (4.20 °C) / (3.90 °C/m)

Once we have the molality, we can calculate the moles of the compound:

moles = molality * mass of solvent (in kg)

Finally, we calculate the molar mass:

molar mass = mass of solute / moles of solute

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2.56 moles of HCl are required to react with 0.64 moles of KMnO4.

The balanced chemical equation is given as;2KMnO4 + 8HCl → 3Cl2 + 2MnO2 + 4H2O + 2KCl.This equation is balanced in such a way that 2 moles of KMnO4 reacts with 8 moles of HCl to produce 3 moles of Cl2, 2 moles of MnO2, 4 moles of H2O and 2 moles of KCl.We are given the number of moles of KMnO4 as 0.64 moles.Now, we can use stoichiometry to find the number of moles of HCl required to react with 0.64 moles of KMnO4.The balanced chemical equation shows that 8 moles of HCl reacts with 2 moles of KMnO4.

So, one mole of KMnO4 would react with 8/2 = 4 moles of HCl.Now, the number of moles of HCl required to react with 0.64 moles of KMnO4 would be;Moles of HCl = Moles of KMnO4 x (Moles of HCl / Moles of KMnO4) Moles of HCl = 0.64 x 4 = 2.56 moles of HCl.

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To calculate the freezing point and boiling point, additional information about the solvent and solute is necessary.

To calculate the freezing point and boiling point of a substance assuming 100% dissociation, we need to consider the effect of dissociation on the colligative properties of the solution. The colligative properties, such as freezing point depression and boiling point elevation, depend on the number of solute particles present in the solution.

For freezing point depression:

ΔTf = i * Kf * m

Where:

ΔTf is the freezing point depression,

i is the van't Hoff factor (number of particles after dissociation),

Kf is the cryoscopic constant of the solvent,

m is the molality of the solution

Assuming 100% dissociation means that the van't Hoff factor (i) is equal to the total number of ions formed after dissociation.

For boiling point elevation:

ΔTb = i * Kb * m

Where:

ΔTb is the boiling point elevation,

i is the van't Hoff factor (number of particles after dissociation),

Kb is the ebullioscopic constant of the solvent,

m is the molality of the solution.

It's important to note that the van't Hoff factor depends on the nature of the solute and its degree of dissociation. For example, for a compound like NaCl, which completely dissociates into two ions (Na+ and Cl-), the van't Hoff factor would be 2.

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a) The Kc value of the reaction is 22, 013

b) The rate of production of NO is 0.002

c) Kc value of reaction in new temperature is 0.004

a)The reaction equation is :

2NO (g) + O2 (g) ⇔ 2NO2 (g)

The equilibrium constant, Kc is given by the expression,

Kc = [NO2]² / [NO]² [O2]... equation (1)

At 380°C, the rate constant for the forward reaction is 2.6x10 liter-/mole-sec and this reaction is first order in O2 and second order in NO.

The rate constant for the reverse reaction at 380°C is 4.1 liter/mole-sec and this reaction is second order in NO2.

Therefore, the rate equation for the forward reaction is given by,

k = k'[O2]¹[NO]²... equation (2)

The rate constant k' is obtained by substituting the given values of k and concentrations of reactants [O2] and [NO] in the rate equation.2.

6x10 = k'[0.29][NO]²

k' = (2.6x10) / (0.29)(0.006)²

k' = 261.22 liter² / mole² sec

Substituting the value of k' in equation (1) gives the equilibrium constant at 380°C,

Kc = [NO2]² / [NO]² [O2]

Kc = [NO2]² / [0.006]² [0.29]

Kc = 22, 013

b)The rate of production of NO is given by the expression,

rate = k[NO]^2 [O2]^1... equation (3)

Substituting the values of k and concentrations of [NO] and [O2] in equation (3),

rate = (261.22)(0.006)^2(0.29)^1 = 0.002

c)When 15% of NO has decomposed to NO2 and O2, the concentration of NO remaining in the reaction vessel is 0.85 x 0.20 = 0.17 M.

The concentration of NO2 and O2 formed by the reaction is equal and is equal to 0.85 x 0.20 / 2 = 0.017 M.

The equilibrium constant at the new temperature is given by the expression,

Kc = [NO2]² / [NO]² [O2]Kc = (0.017)² / (0.17)² [O2]... equation (4)

It is not given what the concentration of O2 is.

However, the total concentration of gases in the reaction vessel is 5.0 L.

Therefore, the total moles of gas = 0.20 + 0.017 + O2... equation (5)

The concentration of O2 is calculated by substituting the values of moles of gases and the volume of the reaction vessel in equation (5).

O2 = (5.0 - 0.20 - 0.017)O2 = 4.783 L

Substituting the values of [NO2], [NO], and [O2] in equation (4),

Kc = (0.017)² / (0.17)² (4.783)

Kc = 0.004

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Answer:

Pasteurized. Never from concentrate. 110 calories per 8 fl oz serving. There are 16 fresh-picked oranges squeezed into each carton of Tropicana - and the juice from those oranges is bursting with nutrition.

Explanation:

Explanation:

A machine is bought for 3800 and 700 is paid for loading and it is sold for 3800. Is there any loss in transaction? If yes then find the loss percentage.

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