arrange the compounds in order of decreasing solubility in water. a) 1-butanthiol b) 1-butanol c) 1,2-propanediol

The pH of the 1.32 M ammonium chloride (NH4Cl) aqueous solution is 9.12.

To determine the pH of the 1.32 M ammonium chloride (NH4Cl) aqueous solution we need the values of ionization constants (ka and kb)  and the concentration of ammonium chloride which is 1.32 M.

The values of ionization constants (ka and kb) are

Ka of NH4+  = 5.6 x 10-10

Kb of Cl- = 1.0 x 10-7

Calculate the concentrations of NH4+ and Cl- in the solution.

NH4+ = 1.32 M

Cl- = 1.32 M

Calculate the equilibrium concentrations of H3O+ and OH- using the ionization constants.

Ka = [H3O+][NH4+]/[NH4+]

[H3O+] = Ka x [NH4+] = (5.6 x 10-10)(1.32) = 7.37 x 10-10

Kb = [OH-][Cl-]/[Cl-]

[OH-] = Kb x [Cl-] = (1.0 x 10-7)(1.32) = 1.32 x 10-7

Calculate the pH of the solution.

pH = -log[H3O+] = -log(7.37 x 10-10) = 9.12

The pH of the 1.32 M ammonium chloride (NH4Cl) aqueous solution is 9.12.

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Answer: Industrial processes including mining and manufacturing historically have been leading causes of soil pollution. Industrial areas typically have much higher levels of trace elements and organic contaminants. This is due to intentional and unintentional releases from industrial processes directly into the environment, including to the soil, adjacent water bodies, and the atmosphere.

Explanation:

Answer:

0.399

Explanation:

Sig Fig rules

Answer:

How you going to delete my answer even though it was right but dont delete his answer bro didnt even say nun

Explanation:

Answer D

Thermal energy flows from the flask on the left to the flask on the right as energy is transferred from higher to lower temperature.

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.

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Answer:

The correct answer is -

takes place in the Sun

plays a role in the production of essentially all elements heavier than helium

releases large amounts of energy

Explanation:

Fusion reaction takes place when two or more small atomic nuclei come in close proximation for a longer time so the nuclear force pulling them together and form into heavier molecules than helium and releases a huge amount of energy by this process.

A great example of this fusion reaction is the sun where nuclear fusion takes place inside the core of the sun and result in a huge amount of release as it is an exothermic reaction.

Answer:

Explanation

EDGE2021

Answer:

To convert joules to calories, you can use the conversion factor:

1 calorie = 4.184 joules

To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:

4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)

Therefore, there are approximately 0.9 calories in 4,180 joules.

Answer:

1.40

Explanation:

8.45×\(10^{23}\) ×  \(\frac{1 mol}{6.022x10x^{23} }\) = 1.40318 ≈ 1.40 mol

Explanation:

احبك كثيرا اتمنى ذلك أن أقول

Answer:

They all contain sone hydrogen atoms.

Explanation:

H is hydrogen doi

When two oppositely charged particles are closer together, they have a stronger attraction toward one another than if they are farther apart.

The electrostatic force, which is the force of attraction or repulsion between two charged particles, is the cause of this attraction. The magnitude of the electrostatic force between two charged particles is inversely proportional to the square of the distance between them and directly proportional to the product of their charges.

The inverse square law states that as the distance between two charged particles moves closer together, the electrostatic force between them grows as a result of a smaller denominator. Therefore, the stronger the attraction between two oppositely charged particles will be the closer they are.

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Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Solid state

Matter is any has weight and occupies space. The states of matter that we have are the solid, the liquid, gaseous state and plasma.

Solid states are closely packed together and the particles only vibrate about their mean free space compared to liquid and gases that are loosely packed.

The solid state particles are therefore known to form a definite shape and cannot be compressed due to the strong intermolecular attractions that exists between its particles.

Answer:

pa helpppp

Explanation:

pleseee need answerrrr

The correct relations for exothermic and endothermic reactions from the given relations is  H Products > H Reactants in exothermic reactions. Hence, Option (D) is Correct.

In thermochemistry, an exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat.

Therefore, The correct relations for exothermic and endothermic reactions from the given relations is  H Products > H Reactants in exothermic reactions. Hence, Option (D) is Correct.

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-1113.5kJ is the theoretical enthalpy of combustion.

What makes energy different from enthalpy?

The entire amount of heat energy that is either absorbed or released in a thermodynamic system is measured by enthalpy. Internal energy denotes all of the potential or moving energy present in a thermodynamic system.

Enthalpy of combustion is the term used to describe the change in a system's enthalpy that occurs when one mole of a substance fully burns in oxygen or air at a specific temperature.

C₂H5OH()+302(g) → 2CO2(g) + 3H₂O(1)

Reactants:

5 C-H : 5*412

1 C-C : 348

1 C-O: 358

3 O=O: 3* 496

1 O-H: 463

Products:

2*2 C=O : 4*743

2*3 O-H: 6*463

Enthalpy of Vaporization (kJ mol-¹) for :

Ethanol 42.5

Water 41​

Enthalpy of combustion : (5*412 + 348 + 358 + 3* 496 + 463 + 42.5) - ( 3*41 + 4*743 + 6*463)    

                                        : -1113.5kJ

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Answer:8

Explanation:

Atomic number = 8

Mass number = 18

The number of protons and the number of electrons is equal to the atomic number.

The number of neutrons in the nucleus is given by the difference in mass number and atomic number.

So, number of protons are 8

number of electrons = 8

number of neutrons = 18 - 8 = 10

Answer:

I could be wrong but i believe the answer is D. It was not B when i took the test

Explanation:

Answer:

2.41 molecules.

Explanation:

hope this helps!

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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The expected observations for the chemical reaction involving lead nitrate and potassium iodide are as follows as per theory.

Before the reaction, you'd have two separate solutions:

Lead Nitrate solution: This is typically a clear, colorless solution.

Potassium Iodide solution: This is also usually a clear, colorless solution.

REACTION OBSERVATIONS:

As soon as you combine these two solutions, a chemical response takes place, resulting in the almost instantaneous development of a yellow precipitate. Lead iodide is a substance that cannot be dissolved in water.

FINAL APPEARANCE:

The final mixture would have a yellow precipitate (lead iodide) suspended in the solution.

The reaction leads to the formation of lead iodide, a substance with distinctive properties, suggesting a chemical change. The presence of this novel compound is indicated by the yellow hue of the precipitate.

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Considering the Dalton's partial pressure, the total pressure inside the vessel is 0.42 atm.

Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

\(P_{T}\)= P₁ + P₂ + ... + Pₙ

where n is the amount of gases present in the mixture.

This relationship is due to the assumption that there are no attractive forces between the gases.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture. So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

\(P_{A}\)=\(x_{A}\)\(P_{T}\)

In this case, you know:

The partial pressure of gas He can be expressed as:

\(P_{He}\)=\(x_{He}\)\(P_{T}\)

Then, calculate the mole fraction of He as:

\(x_{He}\)= Amount of moles of He÷ Total amount of moles

\(x_{He}\)= 2 moles÷ 7 moles

\(x_{He}\)= 2/7

the total pressure can be calculated as:

0.120 atm= 2/7×\(P_{T}\)

0.120 atm÷ 2/7=\(P_{T}\)

0.42 atm= \(P_{T}\)

Finally, the total pressure is 0.42 atm.

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Physical methods include monitoring temperature, pressure, and color change. Chemical methods include titration and gas analysis.

Monitoring the rate of chemical reactions is important to understand the kinetics of the reaction and optimize the reaction conditions. Physical and chemical methods are used for this purpose.

Physical methods include measuring the change in temperature, volume, and pressure of the reactants and products with time. The rate of reaction can be calculated from the rate of change of these parameters.

Chemical methods include monitoring the concentration of reactants and products with time. This can be done by techniques such as spectroscopy, chromatography, and electrochemistry. These methods are often more accurate and precise than physical methods.

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Answer:

I believe the answer is B

Explanation:

A nucleus of an atom has protons and neutrons. We know that a proton has a charge of +1 , while a neutron has no charge, or 0 . Therefore, the nucleus of an atom will always have a positive charge.

The required volume of sodium hydroxide is 15 mL.

The term concentration refers to the amount of substance present. It is the quotient of the number of moles and volume of solution.

We have the reaction; 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)

Number of moles of CaCO3 = 0.205 g / 100.1 g/mol = 0.0020 moles

Number of moles of HCl = 2.00 M * 7.50/1000 = 0.015 moles

Since 2 moles of HCl reacts with 1 mole of CaCO3

x moles of HCl reacts with 0.0020 moles

x = 0.004 moles of HCl

This means that HCl is in excess by the amount 0.011 moles.

Now consider the reaction; NaOH(aq) + HCl(aq) → H2O(l) + NaCl(aq)

Concentration of HCl = 0.011 moles/0.125L = 0.088 M

From;

CAVA/CBVB = na/nb

CAVAnb = CBVBna

VB = CAVAnb/CBna

VB = 0.088 M * 10mL * 1/0.058 M * 1

VB = 15 mL

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The SI unit to the quantity it measures are:

Mass: The mass of an object is a measure of its amount of matter. The SI unit of mass is the kilogram (kg) or gram (g).

Temperature: Temperature is a measure of the average kinetic energy of the particles in a substance. The SI unit of temperature is the kelvin (K).

Time: Time is a measure of the interval between two events. The SI unit of time is the second (s).

Electric current: Electric current is a measure of the flow of electric charge. The SI unit of electric current is the ampere (A).

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Complete question:

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.

Match each SI unit to the quantity it measures.

Considering the phase diagram, the state of matter that exists in area B is gas.

The correct option is A.

A phase diagram is a graphical representation that shows the conditions of temperature and pressure at which different phases or states of a substance exist.

The axes of a phase diagram typically represent temperature (usually on the horizontal axis) and pressure (usually on the vertical axis). The diagram is divided into regions that correspond to different phases, and the lines separating these regions represent phase boundaries.

The point where three phase boundaries meet is known as the triple point, which represents the temperature and pressure at which all three phases can coexist in equilibrium.

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Answer:

to answer your question "which state of matter have most space between particles"

gas is your best answer

Explanation:

when in gas form..particles gain energy and move further apart

for solids particles are fixed (stays in one spot) and vibrates and for liquids particles gain energy but doesn't have enough space to move around freely..so gas is you best answer

For this exercise we need the polarity of the bonds, for that, we need the electronegativity of the elements from the bonds.

These are nonmetals, so we have covalent bonds.

The 3 of the highlighted bonds are covalent.

-----------------------------------------------------------------------

-C-C-

We calculate the polarity as a subtraction:

Polarity (-C-C-) = 0 = 2.5 - 2.5

2.5 is the electronegativity for C

-----------------------------------------------------------------------

-C-O-

Polarity (-C-O-) = 3.5 (O) - 2.5 (C) = 1.0

-----------------------------------------------------------------------

-C-F-

Polarity (-C-F-) = 4.0 (F) - 2.5 (C) = 1.5

------------------------------------------------------------------------

The electronegativities can be obtained from the Pauling scale.

Now the answer:

Decreasing order of polarity:

-C-F (the most) = 1.5 > -C-O-(the next) = 1.0 > -C-C- (the less) = 0

Answer:

a. 2-heptanone is more reactive than 4-heptanone

b. chloromethyl phenyl ketone is more reactive than bromomethyl phenyl ketone

Explanation:

The reactivity of the carbonyl compound (ketone ) is affected by the steric effect. The steric effect is a hindrance that occurs in the structure or reactivity of a molecule, which is affected by the physical size and the proximity of the adjacent parts of the molecule.

Between 2-heptanone or 4-heptanone, 2-heptanone is more reactive than 4-heptanone. This is because 2-heptanone is less affected by the steric hindrance, unlike the 4-heptanone.

Similarly, the reactivity of the carbonyl compound (ketone) is also affected by the polarity on the carbon compound, which is associated with how electronegative the substituent attached is to the carbonyl compound. From the periodic table, the electronegativity of the Halogen family decreases down the group. Therefore chlorine is more electronegative than bromine.

As such, chloromethyl phenyl ketone is more reactive than bromomethyl phenyl ketone.

Answer:

1/2 f1 will cross

Explanation:

answer it