Calculate the degree of ionization of a 0. 75 M HF (hydrofluoric acid); b the same solution that is also 0. 12 M HCl

Approximately 52.55 grams of Br2 are required to react completely with 29.2 grams of AlCl3.

To determine the amount of Br2 required to react completely with 29.2 grams of AlCl3, we need to use stoichiometry.

First, let's convert the given mass of AlCl3 to moles. We can do this by dividing the mass by the molar mass of AlCl3, which is 133.34 g/mol.

29.2 g AlCl3 / 133.34 g/mol = 0.219 moles AlCl3

Now, using the balanced equation: 2AlCl3 + 3Br2 → 2AlBr3 + 3Cl2, we can determine the mole ratio between AlCl3 and Br2.

From the equation, we can see that for every 2 moles of AlCl3, we need 3 moles of Br2.

Therefore, we can set up a proportion:

0.219 moles AlCl3 / 2 moles AlCl3 = x moles Br2 / 3 moles Br2

Cross-multiplying and solving for x, we get:

x = (0.219 moles AlCl3 * 3 moles Br2) / 2 moles AlCl3
x = 0.3285 moles Br2

Finally, to convert moles of Br2 to grams, we multiply by the molar mass of Br2, which is 159.808 g/mol.

0.3285 moles Br2 * 159.808 g/mol = 52.55 grams Br2

Therefore, approximately 52.55 grams of Br2 are required to react completely with 29.2 grams of AlCl3.

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a. The solvolysis reaction of 1-phenyl-1-chloroethane (R-Cl) with water is:

c. First order in both H2O and R-Cl.

The solvolysis reaction involves the reaction of R-Cl with water, resulting in the formation of an alcohol and a chloride ion. The rate law for this reaction can be determined by studying the dependence of the reaction rate on the concentrations of the reactants.

Experimental data shows that the rate of the solvolysis reaction is directly proportional to the concentration of R-Cl and water. This indicates that the reaction follows first-order kinetics with respect to both R-Cl and H2O.

Based on the given options, the correct answer is c. The solvolysis reaction of 1-phenyl-1-chloroethane (R-Cl) with water is first order in both H2O and R-Cl. This means that doubling the concentration of R-Cl or H2O will approximately double the reaction rate. The other options are not applicable to the solvolysis reaction of R-Cl with water.

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Answer:

14.9 g Sb

Explanation:

The mass of Sb produced can be calculated using the conversion:

Molar Mass (g/mol) = mass (g) / moles

Antimony (Sb) has the molar mass 121.76 g/mol. This value is found on the periodic table. You have been given the moles produced. Therefore, you can find the mass of Sb by plugging these values into the formula and simplifying.

Molar Mass = mass / moles

121.76 g/mol = mass / 0.122 moles

14.9 = mass

The pH is above 7, indicating that the solution is basic.

What is Ionic Equation?

An ionic equation is a chemical equation that only shows the species in the reaction that are actually involved in forming a precipitate or undergoing a chemical change, typically excluding spectator ions. In other words, an ionic equation shows the chemical species that are present and participate in a chemical reaction, while omitting those that do not undergo a chemical change. This type of equation is useful for understanding the actual chemical process that occurs in a reaction and determining the net ionic equation that represents the overall reaction.

a) N₂H₅Br is a salt that is composed of the conjugate base of a weak base (N₂H₅⁻) and a strong acid (HBr). The reaction of N₂H₅Br with water can be written as:

N₂H₅Br + H₂O → N₂H₅OH + HBr

In this reaction, N₂H₅Br dissociates into its respective ions, with N₂H₅⁺ acting as a weak base and reacting with water to form the conjugate acid N₂H₅OH and OH⁻ ions. Therefore, the salt is basic.

b) To determine the pH of the solution, we need to find the concentration of OH⁻ ions. Since N₂H₅⁺ is a weak base, we can assume that its contribution to the OH⁻ concentration is negligible. Therefore, we can use the Kb expression for NH₃ to calculate the concentration of OH⁻ ions:

Kb = [NH₄⁺][OH⁻]/[NH₃]

1.3 x 10⁻⁶ = x²/0.10

x = 3.6 x 10⁻⁴ M

Since [OH⁻] = 3.6 x 10⁻⁴ M, the pH of the solution can be calculated as:

pH = 14 - pOH = 14 - (-log[OH⁻]) = 11.44

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The number of nitrogen molecules that reacted to the hydrogen  to produces the 2 × 10¹⁰ molecules of ammonia is 1 × 10¹⁰ molecules.

The reaction is given below :

N₂ +  3H₂   ---> 2NH₃

The number of molecules of the ammonia =  2 × 10¹⁰ molecules

1 molecule of N₂ produces the 2 molecules of NH₃

The molecules of the nitrogen, N₂ = ( 1/2) ×  2 × 10¹⁰ molecules

The  molecules of the nitrogen, N₂ = 1 × 10¹⁰ molecules.

Thus, the molecules of the N₂ is1 × 10¹⁰ molecules. The correct option is b) 1 × 10¹⁰ molecules.

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The balloon's new volume is 24.6L. An arctic weather balloon being inflated using 24.6 litres of helium gas in a prep shed. The shed is seven degrees Celsius inside.

When the balloon is hauled outside, it is seven degrees Celsius outside. Any three-dimensional solid's volume is equal to how much room it occupies. One of these solids can be a cube, a cuboid, a cone, a cylinder, or a sphere. Chemical compounds are composed of a large number of comparable molecules (or molecular entities), which are composed of atoms from various elements bonded together by chemical bonds. Because of this, a molecule composed of atoms from a single element is not a compound.

v1/t1 = v2/t2

24.6/7 = v2/7

v2 = 24.6L

v1 = v2

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Answer:

Inferring is when a scientist uses reasoning to explain or interpret the things they observe

#1

Used in making of cooking utensils and other architectures.

Used in making heat utensils like heater,oven etc.

Used in making different utensils .

Bronze:-

Used in making medals.

Magnalium:-

Used in making aircraft parts.

#2

Answer:

1.30 moles

Explanation:

As written, the molar mass of the fat is 770.5 g/mole.  Add all the C, H, and O's (I get C48H98O6) and multiply by the molar mass of each.  I obtain the 770.5 grams/mole figure, but would note that a more common fat is actually C3H5(OH(CH2)14(CH3))3 and not C3H5(OO(CH2)14(CH3))3.

Assuming C3H5(OO(CH2)14(CH3))3 is the correct structure, 1000g would mean 1000g/(770.5 g/mole) = 1.298 moles, or 1.30 moles to 2 sig figs.

Answer:

Speed=Distance

Time

Explanation:

Answer:

Explanation:

Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.

The decomposition reaction can be represented by the general equation:

AB → A + B

Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.

There are different types of decomposition reactions, including:

Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):

CaCO3 → CaO + CO2

Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):

2H2O → 2H2 + O2

Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:

Cl2 → 2Cl

These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.

Answer:

Explanation:

reaction in which a compound breaks down into simpler substances or elements

Knowing that the percent yield of this reaction was 72.0%, then 0.3681 moles I₂ was reacted with excess H₂.

Percent yield is defined as the ratio of the actual yield to the theoretical yield multiplied by 100.

Percent yield = (actual yield / theoretical yield) x 100

If a quantity of I₂ was reacted with excess H₂ to give 0.530 moles of HI, and the percent yield of this reaction was 72.0%, then the theoretical yield of the reaction should be 0.7361 moles of HI.

Percent yield = (actual yield / theoretical yield) x 100

72 = (0.530 / theoretical yield) x 100

theoretical yield = 0.7361 moles

Then, write a balanced equation for the reaction of I₂ and H₂ to produce HI.

I₂ + H₂ ⇒ 2 HI

From the balanced equation, 1 mole of I₂ requires 1 mole of H₂ to produce 2 moles of HI.

Theoretically, there should be 0.7361 moles of HI.

Let x = moles of I₂

1 mole of I₂ : 2 moles of HI = x mole of I₂ : 0.7361 moles of HI

x = 0.3681 moles I₂

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Answer:

es correcto bro claro eres un crak

Answer:

Decomposition Reaction

Explanation:

You can determine the type of reaction by writing out a balanced equation.

Solid Potassium Chlorate: KClO3

Potassium Chloride: KCl

Oxygen Gas: O2

Balanced Equation: 2KClO3 -> 2KCl + 3O2

By definition, a decomposition reaction is when a single substance decomposes into two more simpler substances. AB -> A + B

Because the solid potassium chlorate is breaking into two substances, potassium chloride and oxygen gas, it is a decomposition reaction.

Answer:

In a compound, chemical energy is _____required__________ when bonds break.

Answer:

i dont know

Explanation:

trolololololololololololololololol

The decay of radium-226 into radon-222 plus an alpha particle releases approximately 4.9 MeV of energy.

Radium-226 undergoes alpha decay, in which it emits an alpha particle (a helium nucleus) and transforms into radon-222. During this process, a certain amount of energy is released in the form of gamma rays, which are high-energy photons. The energy released in this decay can be calculated using Einstein's famous equation E=mc², where E is the energy released, m is the mass difference between the initial and final states, and c is the speed of light.

The mass difference between radium-226 and the resulting radon-222 plus alpha particle is approximately 0.008931 atomic mass units (amu), which when converted to energy using Einstein's equation, yields a value of approximately 4.9 MeV (million electron volts). This energy is released in the form of gamma rays, which can be measured using various types of detectors.

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Chapter One of the book "The Disappearing Spoon" by Sam Kean is titled "Ruthenium, Rhodium, and Palladium." This chapter explores the fascinating history, properties, and uses of these three elements from the periodic table.

The chapter begins with the story of a chemical spill in the town of Norilsk, Russia, which is home to the world's largest nickel mine. The spill caused massive environmental damage and raised concerns about the toxic effects of metals.

This incident sets the stage for the exploration of elements that possess unique properties and have played significant roles in scientific and industrial advancements.

The author then introduces the readers to the periodic table and its significance in understanding the behavior and characteristics of elements. He explains the arrangement of elements and how they are grouped based on their chemical properties.

Moving on, Kean delves into the history and properties of ruthenium, rhodium, and palladium. He shares interesting anecdotes about their discoveries, including the challenges faced by scientists in isolating and identifying these elements. The author highlights the rarity and value of these metals and their importance in various fields, such as catalysis, electronics, and jewelry making.

Furthermore, Kean discusses the cultural and societal impact of these elements, including their use in the automotive industry, where palladium plays a crucial role in catalytic converters. He also explores the darker side of these elements, such as their involvement in illegal activities, including theft and smuggling.

Overall, Chapter One of "The Disappearing Spoon" provides an engaging introduction to the world of elements and sets the stage for further exploration of the periodic table and its fascinating stories.

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Answer:

B) 0.6M

Explanation:

               I apologize in advance if it is not correct :l

The (M1V1= M2V2) is given for you to plug in the correct numbers so let's jot this down.

                    (M1*V1= M2*V2)

so they give us 6M which would be our (M1), from this we can also conclude that 5mL is also V1; ( if you notice the M1's and V1's are always found next to eachother). This leads us to our 50mL, this would be our V2 because the volume went from 5mL to 50mL. Now lets put this in order based on what we know.

M1= 6M                                (M1*V1= M2*V2)

V1= 5mL

M2= ?

V2= 50mL

now we plug in what we know into the equation to find the unknown (M2)

                   (6M*5mL= M2*50mL)

now we could do the long math, but I don't think your on brainly to do the hard way. so lets keep it simple!

                   We are going to put the 50mL under the (6M*5mL) for division.

                             \(\frac{(6M*5mL)}{(50mL)}\) This is honestly MUCH easier, than manually answering. you just put that in the calculator and it'll give you B) 0.6M

   honestly though I might not know what I'm doing cuz im currently doing my test and decided to answer this question ;)

        Good Luck!

Neil Armstrong earned a Master of Science degree in Aerospace Engineering from the University of Southern California in 1970.

He pursued this degree while working as a NASA astronaut His thesis was focused on the stability of a lunar landing vehicle during the final phase of descent.

In 1962, Armstrong joined NASA as a civilian test pilot and astronaut. He soon became part of the Gemini and Apollo space programs. During his tenure at NASA, he piloted the Gemini 8 mission in 1966. He also commanded the Apollo 11 mission in 1969, where he became the first person to set foot on the Moon.

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ice particles have a strong bonding and arranged regularly so the atom is very close bond to each other in regular arrangement.

the liquid bonding is weaker than ice and the movement of atom is slightly flow around so the atom is slighty close to each other,

vapor bonding is weaker than the liquid and the atom movement is in all direction so the atom of water in this state is far apart from each other and move in all direction

A liquid at 50 degrees Celsius would have a melting point of 50 degrees Celsius and a boiling point of approximately 173.15 degrees Celsius.

What is the liquid?

iquid is a state of matter that has a definite volume, but does not have a fixed shape. It is one of the four fundamental states of matter, along with solid, gas, and plasma. Liquids tend to have a greater volume than solids, but geneLrally take the shape of their container. Examples of liquids include water, milk, blood, gasoline, and oil. Liquids are composed of molecules that tend to have greater mobility and can easily flow past each other. Depending on the temperature, pressure, and composition of the liquid, it can undergo changes in the state of matter.

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The heat released during the reaction, given the values, in kJ is 22.4 kJ.

A simple coffee-cup calorimeter is a device that measures the amount of heat exchanged in a chemical reaction. In order to keep the reaction vessel insulated and prevent heat exchange with the environment, this device utilizes a foam cup. It's an easy and efficient technique to measure the quantity of heat exchanged in chemical reactions.

The amount of heat released during a reaction can be calculated using the following formula: q = m × c × ΔT

Where q is the amount of heat released, m is the mass of the reactants, c is the specific heat capacity of the solution, and ΔT is the change in temperature.

The mass of HBr and KOH is 75.0 g each.

The specific heat capacity of the solution is given to be 4.2 J/g°C.

The change in temperature is (33.0 - 20.0) = 13.0°C.

Substituting these values in the formula, we get,q = 75.0 g x 4.2 J/g°C x 13.0°Cq = 4095 J

Converting this value to kJ, we get,q = 4.095 kJ

However, the question asks for the answer in kJ, so we must round it to one decimal place.

Therefore, the heat released during the reaction, given the values, in kJ is 22.4 kJ.

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Answer:

Melting point.....................

The point at which solid melts to become a liquid at the atmospheric pressure is called melting point

The temperature at which  sugar melts is known as its melting point according to the forces of attraction.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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We can see here that:

We see here that the bar graph will be more understandable if there is: A. Title.

Another thing that can aid in understanding the bar graph is: B. add pictures.

Using rectangular bars with heights or lengths proportional to the values they represent, a bar chart or bar graph displays categorical data. Both a vertical and a horizontal bar plot are possible. A column chart is another name for a vertical bar graph.

An appropriate question to guide Sarah's research will be: C. Which fixture uses the most water in our home?

To make this a real experiment, Sarah has to do the following: D. Collect and analyze data before and after the leaks are fixed.

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The kinetic energy of the electron be, in j is 4.1766 × 10⁴⁹.

Kinetic energy is the power an object has because of its motion. If we want to boost up an object, then we must follow a force. making use of force requires us to do paintings. After work has been accomplished, energy has been transferred to the object, and the object might be moving with a new consistent speed.

Calculation:-

wavelength = 189.1 nm

                   = 189.1 × 10⁻⁹ m

c = λf

f  =  189.1 × 10⁻⁹ m / 3 × 10⁸

   = 63.033  × ⁻ ¹⁷

kinetic energy = hf

                         = 6.626 × 10⁻³⁴ ×  63.033  × ⁻ ¹⁷

                         = 417.66 × 10⁻⁵¹

                          = 4.1766 × 10⁴⁹

The kinetic energy of an item is the electricity that it possesses because of its motion. it is defined because the work needed to boost up a frame of a given mass from relaxation to its stated pace. Having gained this energy for the duration of its acceleration, the frame maintains this kinetic electricity except for its pace changes.

Potential energy saved energy that relies upon the relative position of numerous components of a gadget. A spring has greater potential energy when it is compressed or stretched. A steel ball has extra capability strength raised above the ground than it has after falling to Earth.

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Answer:

c)elements in the same group are in the same family

The elements in the same column are in the same family.

The periodic table is arranged in rows and the periods. The elements in the same row has the same number of shells. The elements in the same column are in the same family.

The correct statements are;

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Answer:

28atm

Explanation:

Using Gay lussac's law equation as follows:

P1/T1 = P2/T2

Where;

P1 = initial pressure (atm)

T1 = initial temperature (K)

P2 = final pressure (atm)

T2 = final temperature (K)

Based on the information provided in this question;

P1 = 30.0 atm, T1 = 30.0°C, P2 = ?, T2 = 10.0°C

NOTE: Absolute temperature i.e. Kelvin is required for this law

T1 = 30°C + 273K = 303K

T2 = 10°C + 273K = 283K

Using P1/T1 = P2/T2

30/303 = P2/283

Cross multiply

P2 × 303 = 30 × 283

303P2 = 8490

P2 = 8490/303

P2 = 28.02

New pressure of the gas = 28atm

Answer:

There will be more collisions and so a greater pressure. The number of particles is proportional to pressure, if the volume of the container and the temperature remain constant. ... Volume is inversely proportional to pressure, if the number of particles and the temperature are constant.