soaps do not work well in hard waters. But they can still be effected it large quantities of soap are added to water. Explain why.​

When hydrogen bromide (HBr) is added to 2-methylbut-2-ene ((CH3)2CCHCH3), an electrophilic addition reaction takes place, where the π bond of the alkene is broken, and the hydrogen and bromine atoms are added to the resulting carbocation.

The reaction proceeds through a Markovnikov addition, where the hydrogen atom attaches to the carbon atom with the greater number of hydrogen atoms.

In this case, the initial addition of HBr to 2-methylbut-2-ene leads to the formation of a primary carbocation, as the positively charged carbon atom only has one alkyl group attached to it. The primary carbocation is relatively unstable, and it can undergo a rearrangement to form a more stable secondary carbocation.

The major product that is typically obtained is the 2-bromo-2-methylbutane. The hydrogen atom from HBr adds to the carbon with three hydrogen atoms (the more substituted carbon), resulting in the formation of a secondary carbocation.

On the other hand, a minor product is also formed, which is 3-bromo-2-methylbutane. This product arises from the addition of HBr to the primary carbocation, which is less stable. Although the primary carbocation is less favored, it can still be formed and lead to the formation of the minor product.

In summary, the addition of HBr to 2-methylbut-2-ene yields two products: the major product is 2-bromo-2-methylbutane, resulting from the addition of HBr to the more stable secondary carbocation, and the minor product is 3-bromo-2-methylbutane, originating from the less stable primary carbocation.

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The rate law show how concentration changes affect the rate of reaction. Correct answer is B.

The concentration of our reactants can affect how quickly a reaction proceeds. The rate law of a chemical reaction is an equation that outlines the connection between the concentrations of the reactants and the reaction rate.

The reaction rate is constant and independent of the N 2 O concentration, according to the rate law. In other words, the reaction is both zeroth order overall and zeroth order in N 2 O. C Doubling the concentration of N 2 O will have no impact on the reaction rate since the reaction rate is independent of the concentration.

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Weakness and nausea are the responses of vomiting and fever. Because people tend to feel weak and uneasy after vomiting.

A response is a response to a stimuli, such as a question, an experience, or another kind of stimulus. You are experiencing an emotional reaction to the drama being played out on screen if you cry during sad movies. A response can take many different forms, such as an explanation for a question, an emotional response, or a rejoinder.

The act of vomiting is the forceful ejection through the mouth of the contents of the upper digestive tract and stomach. It can also be referred to as throwing up or feeling ill.

Vomiting is a reflex that aids the body in getting rid of potentially dangerous chemicals. The majority of people will eventually vomit.

This information relates to vomiting in adults and kids older than 12. For details pertaining to children between the ages of 0 and 12 years, see vomiting in children.

Therefore, Weakness and nausea are the responses of vomiting and fever.

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The amount of heat required to raise the temperature of 67 g of water from 25.7°C to 66°C is approximately equal to 40.3 kJ. Thus, the answer is option a) 40.3 kJ.

The amount of heat required to raise the temperature of a substance is given by the equation:

q = m * c * ΔT

Here, q is the amount of heat required to raise the temperature , m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature due to the heat supplied.

Substituting the given values in the equation, we get:

q = (67 g) * (4.184 J/g°C) * (66°C - 25.7°C)

q = 40,332 J

Converting this value to kilojoules we obtain:

q = 40.332 kJ = 40.3 kJ

Thus 40.3 kJ of heat energy is required to raise the temperature of  67g of water from 25.7 °C to 66° C.

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Answer:

However, there has to be 2 electrons on the first shell, and 8 on the others.

Explanation:

Hope this helps :)

Answer:

1st Answer

= Exothermic reaction

2nd Answer

=Endothermic reaction

3rd Answer

= Endothermic reaction

The percent yield : 79.9%

Percent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

Fe(s)+S(s)⇒FeS(s)

The reaction produces 6.29 g of iron(II) sulfide⇒an actual yield

The maximum  amount that can be produced is 7.87 g ⇒ A theoretical yield

\(\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{6.29}{7.87}\times 100\5=79.9\%\)

In both cases we will have non-organic molecules, so the correct option is B.

Usually, compounds of carbon are organic when we have bonds of hydrogen and carbon.

Now, what happens for pencil lead and diamonds?

Both of these are covalent structures of carbon (so these are only made of carbon) where small impurities may modify some of the covalent structures, but not enough to make them organic compounds. Basically, we could say that both diamonds and pencil lead are "a form of carbon" (which by itself is inorganic).

So the correct option is B.

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Coenzyme q carries electrons from complex I to complex III  and complex II to complex III  in the electron-transport chain.

Coenzyme q  (CoQ), also known as ubiquinone, is the electron carrier in the electron transport system (ETS) present on the inner membrane of mitochondria.

Ubiquinone is a ubiquitous quinone, which accepts electrons from complex II ( succinate dehydrogenase) and  reduces to ubiquinol ( reduced form)

The purpose of the ETS is to generate an H+ ion concentration, by carrying electrons obtained from NADH AND \(FADH_{2}\)   produced by the Krebs cycle and glycolysis in the mitochondrial matrix. This  H+ ion potential will be used by ATP synthase to generate ATP.

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The inner mitochondrial membrane contains CoQ, a key part of the mitochondrial electron transport chain (ETC), which moves electrons from complexes I and II to complex III to provide energy for proton translocation to the intermembrane gap.

An organelle called a mitochondrion can be found in the cells of the majority of Eukaryotes, including mammals, plants, and fungi. Adenosine triphosphate, which is produced by aerobic respiration in mitochondria with their double membrane structure, is used as a source of chemical energy throughout the entire cell.

Coenzyme Q10 takes electrons from reducing equivalents produced during the metabolism of fatty acids and glucose and then transports them to electron acceptors as part of the mitochondrial electron transport chain.

Ubiquinone, also known as coenzyme Q, is a lipophilic molecule that is found in all tissues and cells and is mostly found in the inner mitochondrial membrane. It is generally known that Coenzyme Q is an essential part of the oxidative phosphorylation process in mitochondria.

Thus, The inner mitochondrial membrane contains CoQ, a key part of the mitochondrial electron transport chain (ETC).

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Answer:

D = M/V

Explanation:

D = 55.5g/11.5cm^3

D = 4.83g/cm^3

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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The partial pressure of nitrogen on Venus is approximately 321.914 kPa.

To find the partial pressure of nitrogen on Venus, we need to calculate the partial pressure using the mole fraction of nitrogen and the total atmospheric pressure. First, we convert the total atmospheric pressure from psi to kilopascals (kPa) since the mole fraction is given in terms of kPa.

1 psi = 6.89476 kPa

Therefore, the total atmospheric pressure on Venus is:

1334 psi × 6.89476 kPa/psi = 9197.53 kPa

Next, we can calculate the partial pressure of nitrogen using the mole fraction. The mole fraction of nitrogen is given as 0.035, which means that nitrogen makes up 3.5% of the total moles of gas in the atmosphere.

The partial pressure of nitrogen is given by:

Partial pressure of nitrogen = Mole fraction of nitrogen × Total atmospheric pressure

Partial pressure of nitrogen = 0.035 × 9197.53 kPa

Partial pressure of nitrogen = 321.914 kPa

Therefore, the partial pressure of nitrogen on Venus is approximately 321.914 kPa.

It's important to note that the given atmospheric composition of Venus's atmosphere and the total atmospheric pressure are approximate values and can vary depending on specific conditions and measurements.

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Answer:

the answer is 319 mph

Explanation:

you do 239/.75 (45 minutes will get you a different answer)

0.0205 moles of water were lost if the amount of water lost was 0.369 grams. The given answer is in three significant figures with including zero before the decimal.

To find the number of moles of water lost, we need to know the molar mass of water (H2O).

Molar mass is the sum of the atomic masses of all the atoms present in a molecule.

Since the molecule of water contains two atoms of hydrogen and one atom of oxygen, the molar mass of water is given by the sum of the atomic masses of two hydrogen atoms and one oxygen atom, which is: 2(1.008 g/mol) + 1(15.999 g/mol) = 18.015 g/mol

Therefore, one mole of water has a mass of 18.015 g.

The number of moles of water lost can be calculated using the following formula: Number of moles = Mass of substance / Molar mass of substance

Substituting the given values, we get: Number of moles = 0.369 g / 18.015 g/mol = 0.0205 mol

Thus, 0.0205 moles of water were lost if the amount of water lost was 0.369 grams.

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A metal (M) forms a compound with formula MCl₂. The compound contains 57.69% Cl by mass and the metal is Chromium. Symbol of Chromium metal is Cr.

Given :

57.69 % Cl by mass means that 57.69 grams of chlorine present in 100 grams of compound.

Mass of compound = 100 g

Mass of chlorine = 57.69 g

Mass of metal = 100 - 57.69= 42.31 g

First, we will calculate the moles of chlorine, using formula

Moles = Given mass

              molar mass

Moles = 57.69

              35.45

Moles = 1.627 moles

The given formula of compound is, MCl₂

Therefore, ratio of M : Cl = 1 : 2

We will calculate the moles of metal,

2 moles of Cl combines with 1 mole of metal

1.627 mole of Cl combines with 1.627 = 0.813 mole of metal

                                                        2

calculate the molar mass of metal -

Molar mass of metal =   Given mass  

                                           moles

Molar mass = 42.31  g     = 52.04 g/mol

                       0.813 mol

The molar mass of metal is 52.04 g/mole.

From this, we can conclude that the metal is Chromium (Cr)  

So, the formula will be, CrCl₂

Hence, the identity of the metal is Chromium (Cr)

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Answer:

C

Explanation:

Mechanical weathering, also called physical weathering and disaggregation, causes rocks to crumble. Water, in either liquid or solid form, is often a key agent of mechanical weathering. For instance, liquid water can seep into cracks and crevices in rock. ... It slowly widens the cracks and splits the rock

2-chloroethanol is more acidic than ethanol due to presence of an electron - withdrawing group.

Basically, out of 2-chloroethanol and ethanol, 2-chloroethanol is more acidic in nature tan ethanol due to the presence of an electron withdrawing group i.e., chlorine atom. Due to the presence of the electron withdrawing group it results in negative inductive effect and thus, the electron density in the –O-H bond decreases significantly and the O-H bond present in the 2-chloroethanol becomes weaker than O-H bond present in the ethanol.

This stabilizes the alkoxide ion and therefore, 2-chloroethanol can easily release a proton and becomes more acidic.

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The volume of 12 gas forms when 21 L Cl2 react at STP is 21 L.

To determine the volume of 12 gas (I assume you mean I2 gas) formed when 21 L of Cl2 reacts at STP (standard temperature and pressure), we need to use the ideal gas law equation.

The ideal gas law equation is given by:

PV = nRT

Where:

P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature

At STP, the pressure is 1 atm, and the temperature is 273.15 K.

From the balanced equation, we can see that the molar ratio between Cl2 and I2 is 1:1. So, if 21 L of Cl2 reacts, it will produce an equal volume of I2 gas.

Given that the volume of Cl2 is 21 L, we can assume the volume of I2 gas formed will also be 21 L.

Therefore, the volume of I2 gas formed is 21 L.

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The equation MgO + 2HCl → MgCl₂ + H₂O is  a balanced equation.

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Answer:

9.43 L Br₂ (g)

Explanation:

First, write a balanced reaction equation. Then use dimensional analysis to convert from grams of aluminum chloride to moles of aluminum chloride (with molar mass from the periodic table), from moles of aluminum chloride to moles of bromine gas (using the balanced equation), and from moles of bromine gas to liters of bromine gas (remember at STP, 1 mol = 22.4 L). See the attached image for the work out. Finally, account for sig figs to get 9.43 L of bromine gas

Explanation:

The problem tells us that:

Nitrogen + Lithium --> Lithium nitride

So the reaction will be:

6Li + N2 → 2Li3N

Answer: 6 Li + N2 → 2 Li3N

The statement 'a combination of substances that are all solids' best describes the meaning of a mixture of solids (Option A is correct).

Solid substances in nature are those materials composed of one or more elements that are found in a static state, which is associated with the lower kinetic energy property of matter that one substance may have in normal constant conditions.

A single or a mix of solid materials form a combination of substances that are all solids because their atoms contain the lower level of kinetic energy possible to move and therefore they are in a static molecular conformation, which characterizes solid substances, e.g., ice in less than zero (0) Celsius degrees.

In conclusion, the statement 'a combination of substances that are all solids' best describes the meaning of a mixture of solids (Option A is correct).

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To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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Answer:

b. 2.8

Explanation:

To determine the amount of copper produced, we need to first balance the chemical equation for the reaction between copper sulfate and zinc. The balanced equation is as follows:

Zn + CuSO4 → ZnSO4 + Cu

From the balanced equation, we can see that 1 mole of zinc (Zn) reacts with 1 mole of copper sulfate (CuSO4) to produce 1 mole of copper (Cu). The molar mass of zinc is 65.38 g/mol, and the molar mass of copper is 63.55 g/mol.

Given that 2.9 g of zinc is consumed, we can calculate the moles of zinc:

moles of zinc = mass of zinc / molar mass of zinc

= 2.9 g / 65.38 g/mol

≈ 0.0443 mol

Since the reaction is 1:1 between zinc and copper, the moles of copper produced will be the same as the moles of zinc consumed. Therefore, 0.0443 mol of copper is produced.

Now, we can calculate the mass of copper:

mass of copper = moles of copper × molar mass of copper

= 0.0443 mol × 63.55 g/mol

≈ 2.81 g

Therefore, the correct answer is b. 2.8 g

chatgpt

The balanced equation for the reaction is:

Zn + CuSO4 -> ZnSO4 + Cu

This means that 1 mole of zinc reacts with 1 mole of copper sulfate to produce 1 mole of zinc sulfate and 1 mole of copper.

The molar mass of zinc is 65.38 g/mol, and the molar mass of copper is 63.55 g/mol.

Therefore, 2.9 g of zinc is equivalent to 0.044 moles of zinc.

This means that 0.044 moles of copper will be produced.

The molar mass of copper is 63.55 g/mol, so 0.044 moles of copper is equivalent to 2.8 g of copper.

Therefore, 2.8 g of copper will be produced.

So the answer is (b).

bardAI

The amount of heat required to convert 5.6 g of the compound from a liquid at 30.0 °C to a gas at 60.5 °C is approximately 1.183 kJ.

To calculate the amount of heat required to convert 5.6 g of the compound from a liquid at 30.0 °C to a gas at 60.5 °C, we need to consider the heat required for temperature change and the heat of vaporization.

First, let's calculate the heat required for the temperature change from 30.0 °C to the boiling point of 47.6 °C in the liquid state:

q1 = mass * specific heat * temperature change

= 5.6 g * 0.91 J/g-K * (47.6 °C - 30.0 °C)

= 81.23 J

Next, let's calculate the heat required for the phase change from liquid to gas:

q2 = heat of vaporization * number of moles

= 27.5 kJ/mol * (5.6 g / molar mass)

= 27.5 kJ/mol * (5.6 g / 146.39 g/mol)

= 1.051 kJ

Finally, let's calculate the heat required for the temperature change from the boiling point to 60.5 °C in the gas state:

q3 = mass * specific heat * temperature change

= 5.6 g * 0.67 J/g-K * (60.5 °C - 47.6 °C)

= 51.02 J

The total amount of heat required is the sum of q1, q2, and q3:

q_total = q1 + q2 + q3

= 81.23 J + 1.051 kJ + 51.02 J

= 1.132 kJ + 51.02 J

= 1.183 kJ

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Answer:

Explanation:

Hess’s law derives directly from the law of conservation of energy, as well as its expression in the first law of thermodynamics. By Hess’s law, the net change in enthalpy of the overall reaction is equal to the sum of the changes in enthalpy for each intermediate transformation: ΔH = ΔH1+ΔH2+ΔH3.

Answer:

c

Explanation:

Law of Conservation of Matter for the formation of sodium chloride, in simplest form would be obeyed when 2 moles of sodium react with 1 ,mole of chlorine to form 2 moles of sodium chloride.

According to law of conservation of matter, it is evident that matter is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of matter and energy are related as matter has mass and mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of matter is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.

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