Aluminum metal reacts with dilute sulfuric acid to produce aluminum sulfate and hydrogen gas. what mass of aluminum, in grams, will react with 5.91 g of sulfuric acid?

Answer:

OA. YESS

Explanation:

They will because they are all over America.

The standard enthalpy of formation is the enthalpy of the reaction that creates a molecule from its raw elements at standard state. The correct answer is (A).

The standard enthalpy of formation is the enthalpy change that occurs when one mole of a compound is formed from its constituent elements in their standard states at a specified temperature and pressure. It is a measure of the thermodynamic stability of the compound and is usually expressed in units of kilojoules per mole.

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The Lewis acid in the following reaction is (iii) FeCl3. This is a long answer, but let me explain what a Lewis acid is, and how we identify it.

What is a Lewis acid?A Lewis acid is an electron-pair acceptor; in other words, it is an atom or a molecule that can accept a pair of electrons. When a Lewis acid accepts a pair of electrons from a Lewis base, it forms a new compound.What is a Lewis base?A Lewis base, on the other hand, is an electron-pair donor. When it donates a pair of electrons to a Lewis acid, it forms a new compound.How to identify a Lewis acid?To identify a Lewis acid, we look at the central atom in a compound. If the central atom has an incomplete octet or empty orbitals, it is likely to be a Lewis acid.

A Lewis acid can also have a polar bond or an electronegative element attached to it.Iron (Fe) in FeCl3 has an incomplete octet. It only has 6 valence electrons, so it can accept a pair of electrons to complete its octet. Chlorine (Cl) in FeCl3 has a polar bond with the Fe atom, and it is also electronegative, which makes FeCl3 a Lewis acid. Therefore, the correct option is (iii) FeCl3.

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To calculate the molar solubility of lead thiocyanate (Pb(SCN)2) in pure water, we need to use its solubility product constant (Ksp). The Ksp value represents the equilibrium constant for the dissociation of the compound into its constituent ions.

The balanced chemical equation for the dissociation of lead thiocyanate is Pb(SCN)2 ⇌ Pb2+ + 2SCN-

The Ksp expression for this reaction is:

Ksp = [Pb2+][SCN-]^2 Since lead thiocyanate is a sparingly soluble salt, we can assume that its dissociation is complete, which means the concentration of the lead (Pb2+) ions will be equal to the solubility of the compound (s). Thus, we can write the Ksp expression as:

Ksp = s * (2s)^2

Given that the Ksp value is not provided, The molar solubility is directly related to the square root of the Ksp value. Therefore, without the Ksp value, we cannot determine the molar solubility of lead thiocyanate in pure water.

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Answer:

D.) the mass in grams of one mole of a substance

Explanation:

Edge 2020

Answer:

60 Miles per Hour

Explanation:

You included no scenario so I will develop a hypothetical that you can reference.

Assuming a car traveled a distance of 450 miles from one place to another in 9 hours with the car travelling 180 of those miles between 6 hours and 9 hours, what was the average speed between those 6 and 9 hours.

The car travelled 180 miles in 6hours - 9 hours.  First find out how many hours this is:

= 9 - 6

= 3 hours

Speed = Distance / Time

= 180 / 3 hours

= 60 miles per hour

Answer:

7.5 hours

Explanation:

avarage speed = min speed + max speed ÷ 2

= 6 + 9 ÷ 2

= 15 ÷ 2

= 7.5

The presented statement states that 52.5 lbs. of salt had been consumed after 30 minutes.

Salts come in a variety of forms, such as a double salt, corrosive salt, or basic salt. A salt that forms when a potent acid and a feeble base interact is referred to as a "acidic salt."

There seem to be initially 100 gal with in tank. The amount of salt is 60 lbs. The tank has a salt content of 60/100, or 0.6 pounds per gal.

One pound per gallon of water is coming in.

Because the combination is continually varying, the concentration of the water that comes out is uncertain.

Each minute, the tank is dropping 1 gal. (3-2=1)

Utilize this information to configure three functions for volume, saturation, and salt content: V(t), S(t), and C(t).

V (t) = 100 - t

s (t) = 60 plus 2t - 3t * C (t)

C (t) = s(t)/V(t) = 60 + 2t - 3t * C(t)/ 100 - t

Solve for C with a little mathematics (t)

C (t) = 60 + 2t / 100 + 2t

Now, we are aware of the tank's salt content at all times.

Evaluate at t = 30

C (30) = 60 + 2(30)/100 - 2(30) = 120/160 = 3/4

s(30) = 60 + 2(30) - 3(30)(3/4) = 120 - 90(3/4) = 52.5

Consequently, 52.5 lbs of salt had been consumed within 30 minutes.

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Answer:

The maximum number of electrons present in a particular shell is calculated by the formula 2n2, where “n” represents the shell number. For instance, K shell is the first shell and it can hold up to 2(1)2 = 2 electrons. Similarly, L shell is the second shell and it can hold up to 2(2).

In the USA, cigarette smoke and radon are the two sources of indoor air pollution causing the most deaths.

Cigarette smoke is a well-known source of indoor air pollution and can cause a variety of health problems, including lung cancer, heart disease, and respiratory infections. According to the US Centers for Disease Control and Prevention, cigarette smoking is responsible for more than 480,000 deaths per year in the US. Radon is a less well-known but equally serious source of indoor air pollution. It is the second leading cause of lung cancer in the US, and the risk of lung cancer from radon exposure is highest among smokers.

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Answer: 3.6 x 1023 molecules and 0.143 Litres

Answer:lonic

Explanation:A neutral atom has an equal number of electrons and protons. When an electron is lost, the atom becomes positively charged and is called a cation. On the other hand, when an electron is gained by an atom, it becomes negatively charged and is called an anion. The distance of the nucleus of an ion and the valence electron is referred to as the ionic radius.

Answer:

4

Explanation:

The solution it option 4, where both the mass and time increase.

Answer:

The frequency of calibration for a colorimeter will depend on the specific model and the environment in which it is used. Generally, it is recommended to calibrate the colorimeter at least once a year, or more often if the instrument is used in a harsh environment.

The frequency of calibration for a colorimeter will depend on the specific model and the environment in which it is used.  Thus,it is recommended to calibrate the colorimeter at least once a year.

A colorimeter is a device used in colorimetry that measures the absorbance of particular wavelengths of light by a specific solution.It is commonly used to determine the concentration of a known solute in a given solution by the application of the Beer–Lambert law, which states that the concentration of a solute is proportional to the absorbance.

The absorbance is fluctuated in harsh environments thus,it is recommended to calibrate the colorimeter at least once a year.

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The mass of iron oxide produced in the three samples are -

Sample 1 = 48g

Sample 2 = 96g

Sample 3 = 72g

Combustion is the process of burning a substance in the presence of oxygen.

The balanced equation for burning of iron in oxygen can be written as -

                                               4Fe + 30₂ ⇒ 2Fe₂O₃

In Sample 1,

Initial mass of iron = 112g

Final mass of iron = 160 g

Mass of iron oxide produced = 160 - 112

                                                = 48g

In Sample 2,

Initial mass of iron = 224g

Final mass of iron = 320g

Mass of iron oxide produced = 320 - 224

                                                 = 96g

In Sample 3,

Initial mass of iron = 168g

Final mass of iron = 240g

Mass of iron oxide produced = 240 - 168

                                                  = 72g

This suggests that the combustion of iron has taken place.

Therefore, the mass of iron oxide produced in the three samples are -

Sample 1 = 48g

Sample 2 = 96g

Sample 3 = 72g

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The molarity of the perchloric acid solution is 7.75 M if 15.5 ml of base are needed to neutralise 13.6 ml of acid.

To determine the molarity of the perchloric acid, we can use the balanced chemical equation for the reaction between perchloric acid (HClO4) and barium hydroxide (Ba(OH)2):

2 HClO4 + Ba(OH)2 → Ba(ClO4)2 + 2 H2O

From the equation, we can see that 2 moles of perchloric acid react with 1 mole of barium hydroxide. Therefore, the mole ratio between the two substances is 2:1.

Given:

Volume of barium hydroxide solution (base) = 15.5 mL

Volume of perchloric acid solution (acid) = 13.6 mL

Molarity of barium hydroxide solution = 0.136 M

Determine the moles of barium hydroxide (base):

Moles of Ba(OH)2 = Molarity of Ba(OH)2 × Volume of Ba(OH)2 solution

= 0.136 M × 15.5 mL

= 2.108 mol

Use the mole ratio to find the moles of perchloric acid (acid):

Moles of HClO4 = (1/2) × Moles of Ba(OH)2

= (1/2) × 2.108 mol

= 1.054 mol

Calculate the molarity of perchloric acid (acid):

Molarity of HClO4 = Moles  / Volume of HClO4 solution

= 1.054 mol / (13.6 mL × 1 L/1000 mL)

= 7.75 M.

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Answer:

hello, the answer is polygenic:)

The conditions of temperature and pressure in which a sample of CO₂ (g) would behave least like an ideal gas are high temperature and high pressure; 150°C and 300 kPa, option C

An ideal gas is any gas whose molecules obey the gas law and whose behavior follows the ideal gas behavior.

The behavior of ideal gases is as follows:

For a given gas to behave as an ideal gas, it must be under conditions of extremely high temperatures and low pressure.

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Answer:

here

Explanation:

a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.

You should communicate your concerns about the missing, ambiguous, inaccurate, and unclear requirements to the project manager and propose a solution to address them effectively.

In this situation, it is crucial to prioritize the quality and accuracy of the requirements rather than succumbing to pressure. It is your responsibility to ensure the success of the project by identifying and addressing any deficiencies in the requirements. By communicating your concerns to the project manager, you can highlight the risks associated with proceeding without resolving the issues. Propose a plan to work collaboratively with the project team to clarify and improve the requirements. This might involve conducting additional analysis, gathering more information, or involving stakeholders for further input. By taking proactive steps to address the shortcomings, you can mitigate risks and contribute to a successful project outcome.

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Stimuli for various sensations are received for the first time by the senses, which make up the sensory system, which is the set of organs such as:

that capture the chemical and physical stimuli and sensations of our body and the environment, transmitting them in the form of electrical stimuli to the central nervous system, which processes them and translates them into sensations and responses.

An example of a contact external sense is sight and taste, such as our eyes that are capable of reproducing images external to us that are not produced internally, such as hunger and common sense.

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Answer:

Anemometer. An anemometer is a type of weather instrument that measures wind speed.

The oxidation number of the zinc in the ZnCl₂  is the +2.

The oxidation number, is also called as the oxidation state, the total number of the electrons that an atom either will gains or will loses in order to form the chemical bond with the another atom.

The oxidation number of the chlorine = -1

The oxidation number of the Zn is as follows :

Zn + 2( -1 ) = 0

Zn - 2 = 0

Zn = + 2.

The Oxidation number of an atom can be  defined as the charge that the atom appears will have on forming the ionic bonds with the other heteroatoms.

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Answer: Adenosine triphosphate, or ATP, is the primary carrier of energy in cells. The water-mediated reaction known as hydrolysis releases energy from the chemical bonds in ATP to fuel cellular processes.

Explanation:

Answer:

The answer is in the explanation

Explanation:

Half-life is defined as the time that a substance requires to decrease its concentration in the half of the initial concentration. For example, if we have 1M of a substance X, after 1 half life the concentration is:

1M / 2 = 0.5M

Now, after the second half-life, the concentration would be:

0.5M / 2 = 0.25M

That is the reason why the substance is not totally consumed after two half lives.

Answer:

pressure of the gas in kPa = 133.75 Kpa

Explanation:

Given:

To find:

Pressure of gas in KPa = ?

Solution:

From ideal gas equation,

PV = nRT

P × 8 L = 0.5 mol × 0.082 L.atm/K.mol × 257.6 K

P = 1.32 Atm

We know that 1 atm = 101.32 K Pa

1.32 Atm = 1.32×101.32 Kpa = 133.75 Kpa

P = 133.75 Kpa

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Answer:

The shapes of continents fit together like a puzzle.

Explanation:

Just look at the east coast of South America and the west coast of Africa—it's almost a perfect fit! Identical rocks have been found on different continents. These rocks formed millions of years ago before the continents separated.

FeCl3 reacts with salicylic acid to produce a positive result in the aspirin lab.

In the aspirin lab, FeCl3 is used as a reagent to test for the presence of salicylic acid, which is a key intermediate in the synthesis of aspirin. FeCl3 reacts with salicylic acid to produce a positive result, which is indicated by the formation of a deep purple color. This reaction is known as the ferric chloride test and is a common way to detect the presence of phenols in a substance.

When FeCl3 is added to a solution containing salicylic acid, the iron ions in the FeCl3 complex with the hydroxyl group on the salicylic acid molecule. This complex absorbs light in the visible range and appears as a deep purple color. The intensity of the color is proportional to the amount of salicylic acid present in the solution.

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When the engineer adds an additional 1.2 atm of nitrogen dioxide, the total pressure of the mixture is 4.9 atm + 1.2 atm = 6.1 atm. At equilibrium, the pressure of dinitrogen tetroxide is approximately 2.3 atm.

This is calculated by subtracting the equilibrium pressure of nitrogen dioxide (2.7 atm) from the total pressure of the system (6.1 atm). Therefore, after equilibrium is reached the second time, the pressure of dinitrogen tetroxide is 2.3 atm.

When nitrogen dioxide gas is added to a system, the equilibrium pressure of dinitrogen tetroxide is determined by Le Chatelier's principle. This principle states that when a system is disturbed from equilibrium, it will shift to re-establish equilibrium.

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The amount of water that should be added to 28 ml of 15​% alcohol solution to reduce the concentration to ​14% is: 2 ml

To solve this problem, the formula and the procedure that we have to use is:

c1 * v1 = c2 * v2

Where:

Information about the problem:

Applying the dissolution of concentrations formula and clearing the volume of the diluted solution (v2) we get:

c1 * v1 = c2 * v2

v2 = (c1 * v1)/ c2

v2 = (15% * 28 ml)/ 14%

v2= 30 ml

In order to know how much water should be added we have to subtract 28 ml from the volume of the diluted solution:

amount of water should be added = v2 - v1

amount of water should be added = 30 ml - 28 ml

amount of water should be added = 2 ml

In chemistry a solution is known as a homogeneous mixture of two or more components called:

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