Calculate the molarity of each solution.
A) 38.2 g of KCl in 0.945 L of solution
Express your answer using three significant figures.
B) 64.3 g of C2H6O in 3.8 L of solution
Express your answer using two significant figures.
C) 36.2 mg of KI in 106 mL of solution
Express your answer using three significant figures.

(a) Van der Waal's forces. Van der Waal's forces are weak electrostatic interactions between non-polar molecules.

These weak forces arise from the fluctuating dipoles within the molecules, which cause temporary charges to develop and attract each other. This attraction leads to the formation of weak intermolecular bonds, which are mainly responsible for the attraction between non-polar molecules. These forces are weak in comparison to other intermolecular forces, such as hydrogen bonding and ionic bonds, but are still important for the stability of non-polar molecules and their ability to dissolve in other non-polar solvents.Van der Waals forces are attractive intermolecular forces between molecules caused by the fluctuating dipole moments of molecules.

learn more about ionic bonds Refer:brainly.com/question/11527546

#SPJ1

complete question:The attraction that non-polar molecules have for each other is primarily caused by —

(a) Van der Waal's forces (b) Difference in electronegativities

(c) Hydrogen bonding (d) High ionisation energy​

Taking into account the definition of dilution, the final concentration of the solution is 0.68 M.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, and the volume of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

4.2 M× 14 mL= Cf× 86 mL

Solving:

(4.2 M× 14 mL)÷ 86 mL= Cf

0.68 M= Cf

In summary, the final concentration is 0.68 M.

Learn more about dilution:

brainly.com/question/6692004

#SPJ1

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

For more such question on temperature visit:

https://brainly.com/question/4735135

#SPJ8

The reasonable ground-state electron configuration would be \(1S^2,2S^2,2P^6\)

According to the rules of electron configurations, lower energy level orbitals are filled before higher energy level orbitals.

Thus, the order of filling orbitals according to their energy levels would be: 1S, 2S, 2P, 3S, 3P. etc.

Also, there is a need to be conversant with the number of electrons each orbital can take. S can only take 2, and P can take a maximum of 6 electrons.

Thus, the only reasonable electron configuration would be  \(1S^2,2S^2,2P^6\)

More on electron configurations can be found here: https://brainly.com/question/14283892

#SPJ1

The following data were obtained when a sample of barium chloride hydrate was analyzed as described in the Procedure section. Mass of empty test tube Mass of test tube and hydrate (before heating) Mass of test tube and anhydrous salt (after heating) 18.42 g 20.75 g 20.41 g Calculate :

Note: The percent water in the hydrate should not be negative, so this calculation must be incorrect.

Important terms in studying hydrated water are as follows: 1. Anhydrous salt is a salt that has lost water molecules, this salt is formed from the decomposition of heated hydrate salts 2. Hydrate salts are salts that have a fixed number of water molecules in each molecule.

Compounds that contain water of crystals are called hydrates, while compounds that do not contain water of crystals are called anhydrous compounds

The word element in Greek is stoicheion, while stoichiometry or stoichiometry has the meaning of measuring elements which include several things, namely atomic mass, molecular mass, empirical formula, molecular formula, concentration, number of moles, reaction equations and everything related to chemical reactions. The number of particles present in a substance in stoichiometry is called moles.

Learn More About Anhydrous salt at brainly.com/question/14809727

#SPJ4

Answer:

The element X is sulfur.

Sulfur will gain 2 electrons to become an ion.

The charge of sulfide ion is (2-).

Explanation:

According to Newton's second law, force equals mass multiplied by acceleration. As a result, in a car accident, the force exerted by the vehicle and its occupants decreases as the time required for the vehicle to stop increases.

We clearly observed in the Exploration that when two cars collide, each feels a force from the other.

According to Newton's third law, when one object exerts a force on another, the second object feels an equal and opposite force exerted by the first object. This is very clear in the two-object collision.

The force with which your body is struck in a collision is referred to as crash force. Crash force is equal to your body weight multiplied by the vehicle's speed.

Newton's second law states that force equals mass multiplied by acceleration. As a result, the force exerted by the vehicle and its occupants in a car accident decreases as the time required for the vehicle to stop increases.

Thus, this way it hits the car.

For more details regarding Newton's law, visit:

https://brainly.com/question/15280051

#SPJ1

The reaction would go left under increased pressure.

Though the question is incomplete and I can't find the complete answer online, I can try to give you an overview about the reaction. If we look at this reaction we can see that it is a reversible reaction.

We then know that the conditions of the reaction is what is going to determine the direction that the reaction is going to go in the system. Given the fact that we have more volumes on the left than on the right, the reaction would move to the left if the pressure is increased.

Learn more about reaction:https://brainly.com/question/28984750

#SPJ1

When two objects descend towards one another, the potential energy related to the gravitational field is released (transformed into kinetic energy).

The potential energy that a huge item has in relation to a different massive object due to gravity is known as gravitational energy and gravitational potential energy. When two objects descend towards one another, the potential energy related to the gravitational field is released (transformed into kinetic energy). Bringing two things farther apart increases the gravitational potential energy.

To know more about gravitational, here:

https://brainly.com/question/3009841

#SPJ1

Answer:

Magnesium chloride/Molar mass

95.211 g/mol

Explanation:

Only Ag2CO3 will precipitate from the solution.

When Na2CO3 is added to the solution, it will react with the Ag^+ and Pb^2+ ions to form precipitates of Ag2CO3 and PbCO3. The Mn^2+ ion concentration is not high enough to form a precipitate with Na2CO3.

First, let's calculate the initial concentration of Ag^+ and Pb^2+ ions in the solution:

Ag^+: 0.00050 M

Pb^2+: 0.00050 M

Next, we need to calculate the concentration of Na2CO3 after it is added to the solution. Since we added 10.00 ml of 1.0*10^-6 M Na2CO3 to a total volume of 500 ml, the final concentration of Na2CO3 is:

[Na2CO3] = (10.00 ml / 500 ml) * 1.010^-6 M

[Na2CO3] = 2.010^-8 M

Now we can use the Ksp values to determine which precipitates will form.

For Ag2CO3:

Ksp = [Ag^+]^2[CO3^2-]

8.110^-12 = (2x)^2 (2x)

8.110^-12 = 4x^3

x = 2.0*10^-4 M

Since the concentration of CO3^2- is higher than the solubility product, Ag2CO3 will precipitate.

For PbCO3:

Ksp = [Pb^2+][CO3^2-]

7.410^-14 = (0.00050 M)(2x)

x = 9.210^-11 M

Since the concentration of CO3^2- is lower than the solubility product, PbCO3 will not precipitate.

Therefore, the only precipitate that will form is Ag2CO3.

More on precipitation reactions can be found here: https://brainly.com/question/24158764

#SPJ1

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

For more question on aspirin

https://brainly.com/question/25794846

#SPJ8

Taking into account the definition of molarity, the concentration of the solution is 0.855 \(\frac{moles}{liter}\).

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

In this case, you have:

Replacing in the definition of molarity:

\(Molarity=\frac{1.71 moles}{2 L}\)

Solving:

Molarity= 0.855 \(\frac{moles}{liter}\)

Finally, the concentration of the solution is 0.855 \(\frac{moles}{liter}\).

Learn more about molarity:

brainly.com/question/9324116

brainly.com/question/10608366

brainly.com/question/7429224

Answer: The property which depends on the quantity of the substance is called an extensive property. The free energy change for a reaction (Δ G) depends on the quantity of the substance and is therefore an extensive property. It shows the additive nature. The extensive property Δ G is easily calculated from the formula, ΔG = -nFE cell.

Explanation:

Explanation:

HERE IS YOUR ANSWER.....

Answer:

Chemical Energy is stored in food molecules

Answer:

chemical energy

Explanation:

because none of the other make sense

The compound involved is copper(II) sulfate pentahydrate, that is, CuSO₄.5H₂O.

The heat will make the water separate, so the balanced equation is:

Since we start with one compound and end with more than on, this is a decomposition reaction.

Since we started with 8.924 g of CuSO₄.5H₂O, we can calculate how many moles are there to make the stoichiometry of the products.

The equation we use for transforming mass to number of moles or the other way around is:

Where M is the molar weight of the compound.

The molar weight of CuSO₄.5H₂O is:

Thus, the number of moles is:

The reaction is 1 to 1 for CuSO₄ and 1 to 5 for H₂O, so this reaction will produce:

Now, we just need to convert these to mass, but first we need the molar weight of CuSO₄ and H₂O:

So, we have:

So, in the end we will have 0 g of copper(II) sulfate pentahydrate, approximately 5.705 g of copper(II) sulfate and approximately 3.219 g of water.

Answer:

P6S9

Explanation:

Firstly, let's write the numbers in Latin

1 = mono

2 = di

3 = tri

4 = tetra

5 = penta

6 = hexa

7 = hepta

8 = octa

9 = nona

Secondly, write the symboles of the given elements:

Phosphorus is P

Sulfide is S

Finally, connect the numbers and symbols.

Rule of pronunciation: Number of first element + symbol of first element + number of second element + symbol of second element

P6S9

Please upvote.

The jumbled word "gzeysktqix" can be unscrambled to form the word "skyzigtext."

Here are possible words that can be made from this jumbled word:

Sky: Referring to the atmosphere above the Earth.

Zig: Describing a series of sharp turns or angles.

Text: Referring to written or printed words.

Six: The number following five and preceding seven.

It seems that the jumbled word has provided a mix of letters that can be rearranged to form these words. This exercise is likely intended to enhance the student's vocabulary skills, spelling ability, and problem-solving skills. By unscrambling the letters, the student is encouraged to explore different word possibilities and apply their knowledge of language. It also promotes critical thinking and creativity as they find valid words from the given set of letters.

for such more questions on unscrambled

https://brainly.com/question/23994485

#SPJ8

Hi there,

I hope you and your family are staying safe and healthy!

The correct answer is C

Each shell can contain only a fixed number of electrons. The first energy shell around a nucleus can hold up to 2 electrons. Then the second shell can hold up to 8 eletrcons.

Please leave 5 stars and a like if you find this answer helpful!

Best,

~Gary

The energy of a radio wave with a frequency of 5.0 GHz is 3.313 × 10-²⁴J.

The energy of a wave can be calculated by using the following formula:

E = hf

Where;

The frequency of a wave is the quotient of the number of times (n) a periodic phenomenon occurs over the time (t) in which it occurs. The energy can be calculated as follows:

E = 6.626 × 10-³⁴ × 5 × 10⁹.

E = 3.313 × 10-²⁴Hz

Therefore, 3.313 × 10-²⁴J is the energy of the wave.

Learn more about energy at: https://brainly.com/question/2393994

#SPJ1

Answer:

–0.16 m

Explanation:

From the question given above, the following data were obtained:

Time (t) = 0.18 s

Acceleration due to gravity (g) = –9.81 m/s²

Height (h) =?

We can obtain how far the ruler will fall by using the following equation:

H = ½gt²

H = ½ × –9.81 × 0.18²

H = ½ × –9.81 × 0.0324

H = –0.16 m

Thus, the ruler will fall –0.16 m before you will catch it.

President Bush signed the Energy Policy Act in 2005 affect hydropower because Bush enacts the Energy Policy Act as law in an effort to address the rising energy issues. By offering tax breaks and credit guarantees for energy production of all kinds, including hydropower, the act altered American energy policy.

The revolutionary Architecture Hydraulique, written by French hydraulic and military engineer Bernard Forest de Bélidor, marked the beginning of the development of the modern hydropower turbine.

Note that the Energy Policy Act of 2005 was signed by President Bush on August 8, 2005. The Underground Storage Tank Compliance Act of 2005, Title XV, Subtitle B, amends Subtitle I of the Solid Waste Disposal Act, the primary law that established the underground storage tank (UST) program.

Learn more about hydropower from

https://brainly.com/question/8934285
#SPJ1

The density of the iron placed in the water is 7.87g/mL.

Density is the measure of the mass of matter contained by a unit volume. The density of a substance can be calculated by dividing the mass of a substance by its volume as follows:

Density = mass ÷ volume

According to this question, one adds 9.6 g of iron to 23.60 mL of water and observe that the volume of iron and water together is 24.82 mL.

Volume of iron = 24.82mL - 23.60mL = 1.22mL

Density of iron = 9.6g ÷ 1.22mL

Density of iron = 7.87g/mL

Therefore, 7.87g/mL is the density of the iron.

Learn more about density at: https://brainly.com/question/6107689

#SPJ1

Answer:

6 steps

Explanation:

Answer:

6

Explanation:

I looked it up on Google. Hope this is right

Hess's law is a rule in chemistry that specifies that the enthalpy alteration of a chemical reaction is not dependent on the pathway between the initial and final states. The  ΔH in the reaction given in the question is - 4732 KJ.

Learn more about Hess's law here:

brainly.com/question/26491956

#SPJ1

The technique that would not be helpful in the separation of a mixture of sand and salt is O Magnet.

The combination of salt and sand may be separated via way of means of filtration observed via way of means of an evaporation process. Filtration can separate sand from a aggregate of sand and salt solution (salt dissolved in water). Sand remains at the clear out out paper as a residue after filtering. By boiling the filtrate, not unusualplace salt might also additionally now be produced. Probably the perfect approach to split the 2 materials is to dissolve salt in water, pour the liquid far from the sand, after which evaporate the water to get better the salt.

Thus, the correct option is magnet.

To learn more about filtration check the link below:

https://brainly.com/question/23945157

#SPJ4

This question is incomplete, the complete question is;

You want to plate a steel part having a surface area of 240 in² with a 0.002-in thick layer of silver.

The atomic mass of silver is 107.868 g/mol .

The density of silver is 10.49 g/cm³.

How many atoms of silver are required?

Answer:

4.6 × 10²³ atoms of silver are required

Explanation:

Given the data in the question;

first, we determine the volume of silver layer  

volume of silver layer = surface area × thickness

we substitute

volume of silver layer =  240 in² × 0.002-in = 0.48 in³

we know that 1 in³ = 16.387 cm³

so, volume of silver layer  = 0.48 × 16.387 = 7.87 cm³

Next we calculate mass of silver;

⇒ density × Volume

mass of silver = 10.49 g/cm³ × 7.87 cm³ = 82.5563 g

Now, number of atoms of silver are required will be;

Number of atoms = (mass/atomic mass) × Avogadro number

we know that A.v no. is 6.02214 × 10²³ mol⁻¹

so

Number of atoms = (82.5563 g / 107.868 g/mol . ) × 6.02214 × 10²³ mol⁻¹

= 0.7653 × 6.02214 × 10²³

= 4.6 × 10²³ atoms

Therefore; 4.6 × 10²³ atoms of silver are required