What is “the process in which electrons are rearranged without direct contact”???

Answer: C

Explanation:

Answer:

The answer is 720 seconds :)

Explanation:

15.0 mol H₂O

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

9.03 × 10²⁴ molecules H₂O

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig figs rules and round. We are given 3 sig figs.

14.995 mol H₂O ≈ 15.0 mol H₂O

Answer:

i think the answer is accretion

Answer:

Asteroid or exploding planet.

Explanation:

Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.

Answer:

308.049 g/mol

Explanation:

Given:

Ni(ClO₃)₃

Computation:

Mass of nickel (Ni) = 58.69 g/mol

Molar mass of Cl = 35.453 g/mol

Molar mass of Cl = 16 g/mol

so,

58.69 + 3[35.453+3(16)]

58.69 + 3[35.453+48]

308.049 g/mol

Answer:

D) Previous models

Got it right on USTestPrep

Answer:

previous models

Explanation:

I did it

Answer:

cfre

Explanation:

Answer:

3.15*10 to the power of 24

Explanation:

Using the formula we get wavelength = velocity/frequency. substituting  the values gives us option B

Answer:

what?

Explanation:

Answer:

Diffusion and Dispersion.

Explanation:

The two processes that took place in the given experiment are Diffusion and Dispersion.

When a crystal of potassium magnet is added placed in the bottom of a beaker which contains cold water, after 5 minutes the particles of potassium magnet will diffuse with water through diffusion process and the colour of water turns purple.

After few hours, the colour of solution goes light purple because the tiny particles which were diffused earlier will dispersed in the water and the particles will spread and make the solution lighter in colour.

Hence, the two processes are Diffusion and Dispersion.

Answer: 8.59 L of oxygen gas are needed to produce 100 kJ of energy at STP

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

Standard condition of temperature (STP)  is 273 K and atmospheric pressure is 1 atmosphere respectively.  

1 mole of every gas occupy volume at STP = 22.4 L

The balanced chemical reaction is:

[tex]2C_6H_6(I)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)[/tex]

3909.9 kJ of of energy is produced by  = [tex]15\times 22.4=336L[/tex]

100 kJ of oxygen gas are needed to produce = [tex]\frac{336}{3909.9}\times 100=8.59L[/tex]

Answer:

V2 = 9.58 Litres.

Explanation:

Given the following data;

Initial volume = 25 L

Initial pressure = 115 kPa

Final pressure = 300 kPa

To find the new volume V2, we would use Boyles' law.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

[tex] PV = K[/tex]

[tex] P_{1}V_{1} = P_{2}V_{2} [/tex]

Substituting into the equation, we have;

[tex] 115 * 25 = 300*V_{2} [/tex]

[tex] 2875 = 300*V_{2} [/tex]

[tex] V_{2} = \frac {2875}{300}[/tex]

[tex] V_{2} = 9.58 [/tex]

V2 = 9.58 L

Therefore, the new volume is 9.58 litres.

Answer:

The possible valances can be determined by electron configuration and electron negativity

Good Luck even though this was asked 2 weeks ago

Explanation:

All atoms strive for stability. The optima electron configuration is the electron configuration of the VIII A family or inert gases.

Look at the electron configuration of the nonmetal and how many more electrons the nonmetal needs to achieve the stable electron configuration of the inert gases. Non metals tend to be negative in nature and gain electrons. ( They are oxidizing agents)

For example Florine atomic number 9 needs one more electron to reach a valance number of 8 electrons to equal Neon atomic number 10. Hence Flowrine has a valance of -1

Oxygen atomic number 8 needs two more electrons to reach a valance number of 8 electrons to equal Neon atomic number 10. Hence Oxygen has a valance charge of -2.

Non metals with a low electron negativity will lose electrons when reacting with another non metal that has a higher electron negativity. When the non metal forms an ion it is necessary to look at the electron structure to determine how many electrons the element can lose to gain stability.

For example Chlorine which is normally -1 like Florine when it combines with oxygen can be +1, +3, + 5 or +7. It can lose its one unpaired electron, or combinations of the unpaired electron and sets of the three pairs of electrons.

Answer:

Solution

Explanation:

A solution is a well-mixed mixture containing a solvent and dissolved solute.

It is termed a homogenous mixture.

Solutions are homogeneous mixtures of solutes and solvents. In a solution, the solute particles are distributed uniformly in the solvent. The solute is the substance that is dissolved to make the solution

It is usually present in smaller amount than the solvent. The solvent is the dispersing substance that allows the solute to go into solution.

The solute could be a solid or liquid or gas but usually a liquid. A solution in which the solvent is water is an aqueous solution.

Moles of Carbon dioxide : 13.5

Given

4.5 moles propane

Required

moles of Carbon dioxide

Solution

Reaction(Combustion of Propane) :

C₃H₈(g)+5O₂(g)→3CO₂(g)+4H₂O(g)

In a chemical equation, the reaction coefficient shows the mole ratio of the reacting compounds (either in reactants or products)

From the equation, mol ratio of Propane(C₃H₈) : Carbon dioxide(CO₂) : 1 : 3, so mol CO₂ :

= 3/1 x mol Propane

= 3 x 4.5 moles

= 13.5 moles

Answer:

Ecstasy,LSD, Rohypnol

Answer:

By moving the thickness slide just a little bit to the right and just before the oceanic crust turns to continental crust, I can use either the temperature slider or the composition slider by moving either of them to the right until the oceanic crust turns to be continental crust.

Explanation:

By moving the thickness slider slightly to the right and just before the oceanic crust transitions to continental crust, one can use either the temperature slider or the composition slider to the right until the oceanic crust transitions to continental crust.

Continental crust, the outermost layer of Earth's lithosphere that forms the planet's continents and continental shelves and is formed near plate boundaries between continental and oceanic tectonic plates.

Almost all of Earth's land surface is made up of continental crust.

The thinner oceanic crust is typically less than four miles thick, whereas the thicker continental crust can be up to 25 miles thick.

Individuals can choose to use the temperature slider or the composition slider to the right through till oceanic crust transitions to continental crust by moving the thickness slider bit to the right and just prior to the oceanic crust transitions to continental crust.

Thus, these are the three ways one can change oceanic crust into continental crust using the sliders.

For more details regarding oceanic crust, visit:

https://brainly.com/question/1101764

#SPJ2

Answer:

Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements. All elements are pure substances.

Explanation:

PLEASE MARK ME AS BRAINLIEST

a. t=0.553 s

b. vox(horizontal speed) = 3.62 m/s

Given

h = 1.5 m

x = 2 m

Required

a. time

b. vo=initial speed

Solution

Free fall motion

a. h = 1/2 gt²(vertical motion=h=voyt+1/2gt²⇒voy = 0)

[tex]\tt t=\sqrt{\dfrac{2h}{g} }[/tex]

t = √2h/g

t = √2.1.5/9.8

t=0.553 s

b. x=vox.t(horizontal motion)

[tex]\tt x=v_{ox}\times t[/tex]

vox=x/t

vox=2/0.553

vox=3.62 m/s

Answer:

No experiment is a failure, because anytime you mess up, you learn from your mistakes and when you try the experiment again you can fix what you messed up on last time.

Answer:

A.PbCl2

C.Cl2

Explanation:

[tex] \bold{PbO_2+4HCl\rightarrow PbCl_2+Cl_2+2H_2O} [/tex]

[tex] PbCl_2\:\&\: Cl_2[/tex] are the products in the given chemical reaction.

Hope it helps you in your learning process

Answer: C

Explanation:

According to the passage, as a result of a mutation, an organism may evolve for better survival. The correct option is C.

The mutation is a condition in which genes and DNA sequence changes. Mutation occurs due to mutagens. These mutagens can be biological or chemical. Cells come in contact with these mutagens and undergo mutation.

The mutation causes diseases, due to changes in DNA sequence and genes. People die due to mutation. Sometimes mutation causes the birth of new genes and traits in an organism.

So, in the given condition, the organism will evolve new traits that can be good or necessary for the better survival of the organism. The passage is talking about radiation.

Therefore, the correct option is С, which may evolve for better survival.

To learn more about mutation, refer to the link:

https://brainly.com/question/13923224

#SPJ6

The question is incomplete. Your most probably complete question is given below:

When a cell divides to grow into two new cells, the double helix splits into two single strands of chromosomes, each of which can then replicate a mirror image of itself. This process, called mitosis, happens every time a cell divides, except for sex cells preparing for sexual reproduction. The result is two new cells, each with a double helix of DNA strands identical to that of the original cell.

Though rare, sometimes an error occurs in this process, resulting in a mutation. Radiation or the appearance of other chemicals can increase their frequency. Sometimes an extra base is inserted, substituted, deleted, or damaged. Usually, these mistakes repair themselves, but sometimes they remain and, as a result, can create a change in the coding for a specific trait. If the new trait helps the organism survive, it may be duplicated and passed on to offspring, which, in time, may lead to an evolution in the organism.

1. mol ratio of Al(NO₃)₃ : Na₂CO₃ = 2 : 3

2. Na₂CO₃ as a limiting reactant

Given

Reaction

2 Al(NO₃)₃ + 3 Na₂CO₃ → Al₂(CO₃)₃ + 6 NaNO₃

Required

mol ratio

Limiting reactant

Solution

The reaction coefficient in the chemical equation shows the mole ratio of the components of the compound involved in the reaction (reactants and products)

1. From the equation mol ratio of Al(NO₃)₃ : Na₂CO₃ = 2 : 3

2. mol : coefficient of Al(NO₃)₃ : Na₂CO₃ = 2 mole/2 : 2 mole/3 = 1 : 0.67

Na₂CO₃ as a limiting reactant (smaller)

Answer + Explanation:

When air is cooled, its density increases.

A. increases

Answer:

The answer to your question is A.

Explanation:

when air is cooled, it's density Increases

Answer:

8759g

Explanation:

Given parameters:

Number of moles  = 19moles

Unknown:

Mass of PbI₂  = ?

Solution:

To solve this problem, we first find the molar mass of PbI₂;

   Molar mass of PbI₂   = 207.2 + 2(126.9) = 461g/mol

 Mass of  PbI₂ = number of moles x molar mass  = 19 x 461

                       = 8759g

Answer:

Valency of the two elements

Explanation:

In order to correctly formularize the compound, the student needs to ask of the valences of the elements involved.

Chlorine has valency of -1, while Barium +2.

The exchange of valency gives the formula [tex]BaCl_{2}[/tex].

Another explanation is that Barium donates 2 electrons which the chlorine atoms accept, in order to form the covalent bond.

I hope this was helpful.

Answer:

parallel circuits

Explanation:

Answer:

you would do the exponents first (10 times 23) and then multiply that (230) and 3.20.

Explanation:

That should be correct!:)

Answer:

Watson and Crick were also aided in their discovery by Maurice Wilkins (1916-2004) and Rosalind Franklin (1920-1958). Franklin had taken X-ray photographs of DNA that her colleague, Wilkins, showed to Watson

Explanation:

Answer:

Rosalind Franklin. She discovered DNA as a double helix form. But men got jealous of her and stole her work just because she is a woman. How cruel! That's why there is something called feminism in this world.  

Explanation:

Hope it helped!

Answer:

Total pressure in container = 6.7 atm

Explanation:

Given:

N₂ = 3.5 atm

O₂ = 2.8 atm

At = 0.25 atm

He = 0.15 atm

Find:

Total pressure in container

Computation:

Total pressure in container = N₂ + O₂ + At + He

Total pressure in container = 3.5 + 2.8 + 0.25 + 0.15

Total pressure in container = 6.7 atm