Which series reveals the source of energy for coal? i will mark brainlest!!!!!!!!!!!!!!!!!!!!!!!! giving 20 points

coal chemicals sun
coal plants chemicals
coal animals sun
coal plants sun

Answer:

C, Reactants rearrange to form new products

Explanation:

Methane is a colorless, odorless gas that is present in large quantities in nature and as a byproduct of some human activities.

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The statement that is not true regarding alkanes is: Acyclic alkanes have two fewer H atoms than cyclic alkanes with the same number of carbons. Alkanes are a type of hydrocarbon that only contains C-C and C-H sigma bonds.

A cyclic alkane with four carbon atoms, cyclobutane (C4H8), has two fewer hydrogen atoms compared to the acyclic alkane butane (C4H10), which has a straight chain.

The statement "Acyclic alkanes have two fewer H atoms than cyclic alkanes with the same number of carbons" is not true. In fact, acyclic alkanes have two more hydrogen (H) atoms than cyclic alkanes with the same number of carbons. This is because cyclic alkanes have two fewer hydrogen atoms due to the formation of one C-C sigma bond to close the ring structure. For example, a cyclic alkane with four carbon atoms, cyclobutane (C4H8), has two fewer hydrogen atoms compared to the acyclic alkane butane (C4H10), which has a straight chain.

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Radiation is a type of heat transfer that occurs via vacuum, negating the requirement for a physical medium.

Energy that emanates from a source and moves through space at the speed of light is referred to as radiation. This energy has wave-like qualities and is accompanied by an electric field and a magnetic field. Radiation may also be referred to as electromagnetic waves.

As a mutagen, radiation has the potential to eventually cause cancer. Radiation has the power to kill cells or harm the DNA within them, which impairs the cells' capacity for reproduction and may ultimately result in cancer. High energy particles flow through your body when radiation is present.

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One of the three main ways that heat conduction can be delivered is by thermal radiation. Convection and conduction are the other two methods, both of which require matter to transmit heat.

Energy who departs a source and moves via space at the rate of light is referred to as radiation. This energy has wave-like characteristics, and a magnetization and electrical potential complete it. Electromagnetic waves can sometimes be referred to as "radiation."

It can be made artificially or by unstable nuclei disintegrating radioactively. From its source, radiation sends vibrational frequencies or particles in all directions. There are several different forms of energy, each with its own properties and effects.

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Answer:Question

Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.​

Explanation:

Question

Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.​

Answer:

A. The birthrate is higher than the death rate

Explanation:

The equator is a hypothetical line passing through the center of the planet at latitude 0°. The Northern Hemisphere and the Southern Hemisphere are the two equal halves of the earth that are separated by the equator.

Greater gravitational force is exerted on the mass of denser objects and materials. This explains why materials with varying densities stack together  

At a transform plate border, the grinding motion between the plates causes shallow earthquakes, significant lateral rock displacement, and a wide zone of crustal deformation. Along the San Andreas Fault in western California, a landscape of this kind may be seen more spectacularly than anywhere else on Earth.

The inner core and the outer core, which encircle the mantle, are the two layers that make up the core. The Bullen discontinuity is the line dividing these two regions. Radius Core The 2,200 kilometers (1,367 miles) thick outer core is primarily made of liquid nickel and iron.

What layers of the Earth is represented by layer 1 and layer 2?

Composition-based Layers

The following layers are visible in a cross section of the Earth: First, there is the crust, followed by the mantle, the outer core, the inner core, the lithosphere, the asthenosphere, the outer core, and the inner core. Based on composition, the earth's core, mantle, and crust are divided: Less than 1% of the mass of Earth is made up of the crust.

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The Dalton's atomic model has been considered too simple, with the development of the subatomic particles.

The atom has been the smallest part of the matter. It has been developed with the atomic model theory introduced by Dalton.

According to Dalton's atomic theory, the atom has been the smallest individual unit of matter. It has not been divided further, and has been, consisting different for every material.

The Dalton model has been, consisting of atom as the smallest individual particle. It has been considered to be not divided further.

However, the study revealed the existence of subatomic particles. It has been led to the development of electrons, protons, and neutrons as the smaller particles than atom.

However, the atom has been the unit that involves in the reaction.

Thus, the development of subatomic particles led to the consideration of Dalton's atomic model as too simple.

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Answer: When later scientists discovered subatomic particles (particles smaller than the atom itself), they realized that Dalton's models were too simple.

Answer:

atomic number

H is on the very top left

they are organized into columns with somewhat similar behaviors ie the alkali metals (the first column or period) are all very reactive (except H as it only has one electron in one shell, it is sometimes put into its own separate category

Explanation:

The concentration of ethanol after reaction goes to completion and the percent change in the concentration of ethanol is  0.1 (10% v/v).

To calculate the concentration of ethanol after the reaction goes to completion, we need to know the initial concentration of ethanol and the reaction stoichiometry. Let's assume we have 100 mL of a solution containing 10% (v/v) ethanol and we want to completely convert it to acetic acid. The balanced chemical equation for the reaction is:
C2H5OH + CH3COOH → CH3COOC2H5 + H2O
If we assume the density of the solution is 1 g/mL, then the initial mass of ethanol in the solution is:
100 mL x 1 g/mL x 0.10 = 10 g ethanol
10 g / 46.07 g/mol = 0.217 mol ethanol
Using the molecular weight of acetic acid (60.05 g/mol), we can calculate the mass of acetic acid needed:
0.217 mol x 60.05 g/mol = 13.01 g acetic acid
If we assume that the volume of the solution remains constant during the reaction, we can calculate the final concentration of ethanol as follows:
Concentration of ethanol = mass of ethanol / (volume of solution x density)
Since the initial volume of the solution is 100 mL and the density is 1 g/mL, we have:
Concentration of ethanol = 10 g / (100 mL x 1 g/mL) = 0.1 (10% v/v)

The percent change in the concentration of ethanol is 100% (since the final concentration is 0% and the initial concentration was 10%).

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(i) The initial reaction rate is \(2*10^{-4} mol litre^{-1} sec^{-1.\)

(ii) The half-life period of the reaction is 1386 seconds.

(iii) The time taken to complete 75% of the reaction is approximately 2772 seconds.

We can use the first-order rate equation:

Rate = k[N2O5]

Where:

Rate is the reaction rate,

k is the rate constant,

[N2O5] is the concentration of N2O5.

Given:

Rate constant (k) = \(5*10^{-4} sec^{-1}\)

Initial concentration of N2O5 =\(0.4 mol litre^{-1}\)

(i) To find the initial reaction rate:

Substitute the given values into the rate equation:

Rate = k[N2O5]

Rate = \((5*10^{-4} sec^{-1})(0.4 mol litre^{-1})\)

Rate = \(2*10^{-4} mol litre^{-1} sec^{-1}\)

The initial reaction rate is \(2*10^{-4} mol litre^{-1} sec^{-1}\).

(ii) To find the half-life period:

The half-life of a first-order reaction is given by the equation:

t(1/2) = (0.693 / k)

Substitute the given value of k into the equation:

t(1/2) = \((0.693 / 5*10^{-4} sec^{-1})\)

t(1/2) = 1386 sec

The half-life period of this reaction is 1386 seconds.

(iii) To find the time taken to complete 75% of the reaction:

The time required to complete a certain percentage of a reaction can be found using the equation:

t = (ln(1 / (1 - x)) / k)

Where x is the fraction of the reaction completed (in this case, 75%).

Substitute the given values into the equation:

t =\((ln(1 / (1 - 0.75)) / 5*10^{-4} sec^{-1})\)

t = 2772 sec

The time taken to complete 75% of the reaction is approximately 2772 seconds.

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The decreasing order of ionization energy will be Mg >Al >P>K.

Ionization energy sometimes referred to as ionization potential, would be the amount of energy it takes to eliminate an electron from a single, isolated atom or molecule.

On moving top to bottom in the periodic table, ionization energy will decrease rapidly.

Al =13 (group 3)

P =15 (group 5)

Mg =12 (group 2)

K =19 (group 1)

The decreasing order of ionization energy will be Mg >Al >P>K.

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Answer:

true they do I yes they do

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

Answer:

Potassium chloride, KCl , is an ionic compound formed by the electrostatic force of attraction that holds the potassium cations and the chlorine anions together. Potassium, K , is located in group 1 of the Periodic Table.

Explanation:

thanks

The temperature (in k) will be 126.509 K

Number of moles of Oxygen = 0.0938 mol

Pressure = 740 torr or 98658.6 Pa

Volume = 1.0 L or 0.001 m3

Temperature in K = ?

To find out the temperature (T) we use the ideal gas equation

    PV = nRT

As we have to find the temperature so rearrange the equation for T

    T = PV / nR

value of R = 8.314 J/mol.K

Put the values in the equation

   V = 98658.6 * 0.001 / 0.0938 * 8.314

   V = 0.000974 / 0.779853

   V = 98.6596 / 0.779853

   V = 126.509 K

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Answer:

The correct option is option;

A. 1.58 mol

Explanation:

The given balanced chemical reaction is presented as follows;

2Al₂O₃ → 4Al + 3O₂

The given mass of Al produced = 85.5 grams

The given molar mass of Al₂O₃ = 85.962 g/mol

The given molar mass of O₂ = 31.998 g/mol

The given molar mass of Al = 26.982 g/mol

\(We \ note \ that \ the \ number \ of \ moles, \ n = \dfrac{Mass }{Molar \ mass}\)

For the given produced Al, n = 85.5 g/(26.982 g/mol) ≈ 3.169 moles

From the given reaction, we have;

2 moles of Al₂O₃ produces 4 moles of Al

∴ 2/4 moles of Al₂O₃ produces 4/4 = 1 mole of Al

2/4 × 3.169 = 1.5845 moles of Al₂O₃ produces 1 × 3.169 = 3.169 moles of Al

∴ 1.5845 ≈ 1.58 moles of Al₂O₃ produces 3.169 moles of Al ≡ 85.5 grams of Al

The correct option is approximately 1.58 moles of Al₂O₃.

• Answer:

m = 3,045.15 g mercur

• Explanation:

Hi there !

density formula

d = m/V =>

=> m = d×V

d(mercury) = 13.534 g/cm3

1ml = 1cm3

V = 225ml = 225cm3

replace

m = 13.534g/cm3×225cm3

m = 3,045.15 g mercur

Good luck !

We must take into account the suggested mechanism mentioned in your previous mail in order to anticipate the rate equation for the reaction between chlorine atoms (Cl) and ozone (O3):

ClO + O3 Cl + 2O2 (rapid step), step 1.

Step 2 (slow step): ClO + Cl Cl2 + O2.

The whole response can be expressed as follows:

2O3 → 3O2

By taking into account the rate-determining step, which is the slowest step in the suggested mechanism, we may formulate the rate equation for the total reaction. It is Step 2 in this instance:

Rate = k[ClO][Cl]

Where:

k is the rate constant for the reaction

[ClO] is the concentration of ClO

[Cl] is the concentration of Cl

Rate = k[ClO][Cl]

Where: [ClO] is the concentration of ClO [Cl] is the concentration of Cl, and k is the reaction's rate constant

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Answer: 0.000187 mg of iron is produced.

Explanation:

To calculate the moles :

\(\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}\)    

\(\text{Moles of} Mg=\frac{0.120g}{24g/mol}=0.005moles\)  

\(3Mg+2FeCl_2\rightarrow 2Fe+3MgCl_2\)

As \(FeCl_2\) is the excess reagent,  \(Mg\) is the limiting reagent.

According to stoichiometry :  

3 moles of \(Mg\) give = 2 moles of \(Fe\)

Thus 0.005 moles of \(Mg\) give =\(\frac{2}{3}\times 0.005=0.0033moles\)  of \(Fe\)

Mass of \(Fe=moles\times {\text {Molar mass}}=0.0033moles\times 56g/mol=0.187g=0.000187mg\)       (1g=1000mg)

Thus 0.000187 mg of iron is produced.

The velocity of Trevor, given that for 55.0 seconds, he moved 583 meters sountheast is 10.6 m/s

Velocity is simply defined as the rate of change of displacement with time. Mathemathically, it is given as:

Velocity = displacement / time

With the above formula, we can obtain the velocity of Trevor as illustrated below::

Velocity = displacement / time

Velocity = 583 meters / 55.0 seconds

Velocity = 10.6 m/s

Thus, from the calculation made above, we can conclude that the velocity of Trevor is 10.6 m/s

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When sodium chloride is added to 100 grams of water in a styrofoam cup and the temperature decreases from 25°C to 24°C while stirring with a thermometer, the thermodynamics of dissolving NaCl in water can be said to be endothermic.

Explanation: Thermodynamics is the science that studies the connection between heat, work, and energy. A study of energy transformation in various processes, including chemical reactions, phase transitions, and changes in temperature and pressure, is included in thermodynamics.

When sodium chloride is dissolved in water, an endothermic reaction occurs, meaning that the surroundings absorb heat. Heat is absorbed by the surroundings during an endothermic reaction, resulting in a decrease in temperature in the reaction vessel.

When NaCl is dissolved in water, the same thing happens. Heat is absorbed from the surroundings to dissolve the salt, resulting in a decrease in temperature. As a result, the thermodynamics of dissolving NaCl in water is endothermic.

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Answer:

You can find p-block elements on the periodic table in groups 13 to 18, you can find the s-block on the periodic table in group 1, Group 3 through Group 12 are d-block elements, and The f-block elements, found in the two rows at the bottom of the periodic table, are called inner transition metals and have valence electrons in the f-orbital's.

Explanation:

Hope this helps!

Answer:

May 17

Explanation:

When it refers to 0% light it describe a new moon, from a new moon to a full Moon are 14 days, then if you start a full moon on May 3 and you add 14 days it means that the next new Moon would be on May 17.

Answer: Electron

Explanation:An electron is most likely to be found in an energy level within an atom.

Explanation:

Acids and alkalis both contain ions. Acids contain lots of hydrogen ions, which have the symbol H+. Alkalis contain lots of hydroxide ions, symbol OH-. Water is neutral because the number of hydrogen ions is equal to the number of hydroxide ions

Answer:

cids and bases both react with water and a lot of acids and bases are soluble in nature. Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solution. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH–).

Explanation:

Answer:

Na2CO3

Explanation:

Na2CO3 is a compound soluble in water. So the correct option is A.

The common ionic solids' solubility laws are as follows. When two rules seem to conflict with one another, the prior rule is used.

Therefore, the correct option is A

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Answer:

Condensation is the change of the physical state of matter from the gas phase into the liquid phase.

Answer:

the conversion of a vapour or gas to a liquid is defined as condensation.