The breaking and forming of bonds between atoms in substances results in changes in the _______ contained in the substances.

What's the effect of surface area change

We know

Pressure is indirectly proportional to area

The subscript 2 denotes that the material contains two aluminum atoms. Silvery-white and light in weight, aluminum is a metal. It is supple and moldable. Cans, foil, culinary kitchenware, window frames, beer kegs, and airplane parts are just a few examples of the many goods that employ aluminum.

Gibbsite and boehmite, two alpha-hydroxide compounds, are found in bauxite. In the synthesis of aluminum compounds such aluminum disulfide, sodium aluminate, metal fluoride, & aluminum chloride hexahydrate, aluminum trihydroxide is a key ingredient.

Natural environments do not contain pure aluminum. Beginning with bauxite, which is made up of dehydrated al2o3 (4.0% to 60%) combined with silica + iron oxide, the manufacturing of primary pure metal can begin. For every 4 to 5 tons of bauxite ore, 2 tonnes of aluminium are produced

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The hydrolysis of 1 ATP molecule releases 7.three kcal/mol of energy.

Outermost excessive power phosphate bond is hydrolyzed, cleaving off the phosphate organization at the cease. ATP will become adenine diphosphate plus an inorganic phosphate.

Usually most effective the outer phosphate is eliminated from ATP to yield power. while this occurs ATP is transformed to adenosine diphosphate, the form of the nucleotide having simplest two phosphates. ATP is able to strength cell strategies by using the usage of shifting a phosphate organization to every different molecule.

At the same time as ATP is damaged down, commonly via the removal of its terminal phosphate employer, power is launched. The strength is used to do paintings by using way of the cell, generally by means of the launched phosphate binding to some other molecule, activating it.

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Answer:

It makes it things grow and it is renewable energy meaning that its infinite and will help life grow fruits grass and with that comes how animals live including us human how does it effect climate it make thing warm and sometimes hot and can cause thunder to make the place cool down sorry if wrong

The pressure in the cylinder is 2.63 GPa.

To calculate the pressure in the cylinder, we can use the ideal gas law equation, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.

Given:

Volume (V) = 13.0 L

Mass of oxygen gas (m) = 47.1 g

Temperature (T) = 336 K

To find the number of moles of oxygen gas (n), we need to convert the mass of the gas to moles. Using the molar mass of oxygen (O2), which is approximately 32 g/mol, we can calculate:

n = m / M

n = 47.1 g / 32 g/mol

n ≈ 1.47 mol

Now, we can substitute the known values into the ideal gas law equation:

P * V = n * R * T

Solving for P:

P = (n * R * T) / V

P = (1.47 mol * 8.314 J/(mol·K) * 336 K) / 13.0 L

Converting the units:

P ≈ (1.47 mol * 8.314 J/(mol·K) * 336 K) / (13.0 L * 1000 L/1 m^3) ≈ 2.63 GPa

Therefore, the pressure in the cylinder is approximately 2.63 GPa (gigapascals).

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Answer:

The main reason why air is cooled before nitrogen and oxygen are obtained is because these two gases are much more soluble in cold air than in warm air. As a result, if air were not cooled before these gases were separated, they would simply mix back together again.

Answer:

to the first

A) mass

to the second

B) Volume

The isotope symbol that fits each description is as follows: 68 neutrons, 47 electrons is Ag b. mass number = 197, 79 electrons is Au c. atomic number = 86, 136 neutrons is Rn d. atomic number = 76, mass number = 192 is Os.

Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei), location in the periodic table, and chemical element but have distinct nucleon numbers (mass numbers) as a result of having a different number of neutrons in their nuclei. Although the chemical properties of each isotope of a given element are nearly identical, they differ in their atomic weights and physical characteristics.

The name "isotope" refers to the fact that different isotopes of the same element occupy the same location on the periodic table. The word "isotope" is derived from Greek origins that mean "the same place".

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Increasing the amount of time it takes for the egg drop device to stop would help protect the egg because it would decrease the force acting on the egg, according to the formula Force = Δ⍴ / Δt.

When the device comes to a stop, the change in momentum (Δ⍴) of the egg will be the same as the change in momentum of the device. If the device stops abruptly, the time interval (Δt) will be small, which means that the force acting on the egg will be larger (since Force = Δ⍴ / Δt). This large force could cause the egg to break.

On the other hand, if the device stops over a longer period of time, the time interval (Δt) will be larger, which means that the force acting on the egg will be smaller (since Force = Δ⍴ / Δt). This smaller force will be less likely to break the egg, making it more likely to survive the fall.

Therefore, increasing the amount of time it takes for the egg drop device to stop will help protect the egg by reducing the force acting on it and increasing the chances of a successful landing.

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Answer:

the answer I think is 76.5L

The empirical formula of the new compound is:

The empirical formula is the chemical formula of a compound that shows the type of atom and the simplest ratio of the number of atoms in the compound. The ratio of the moles of atoms is the same as the ratio of their index numbers in the compound.

mass of compound = 79.836 g,

then the mass of Fe = 70% x 79.836 g = 55.9 g

               mass of O = 30% x 79.836 g = 23.9 g

nFe : nO = mass Fe/ArFe : mass O/ArO

nFe : nO = 55.9 g/56 : 23.9 g/16

nFe : nO = 0.99 : 1.4

nFe : nO = 1 : 1.5

nFe : nO = 2 : 3

So, the empirical formula of the compound is Fe₂O₃.

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Answer: because atoms have more protons

Explanation: just took the test

The balanced half-reactions for the oxidation and reduction in the chemical reaction Cu + Cl₂ → CuCl₂:
Oxidation half-reaction: Cu → Cu²⁺ + 2e-
Reduction half-reaction: Cl₂ + 2e- → 2Cl⁻

An oxidation half-reaction is a chemical equation that describes the process of losing electrons (e-) or an increase in oxidation state of a reactant species in a redox reaction. In an oxidation half-reaction, the reactant species is oxidized, which means it loses electrons, and its oxidation state increases.

On the other hand, a reduction half-reaction is a chemical equation that describes the process of gaining electrons or a decrease in oxidation state of a reactant species in a redox reaction. In a reduction half-reaction, the reactant species is reduced, which means it gains electrons, and its oxidation state decreases.

In the oxidation half-reaction, copper (Cu) loses two electrons and is oxidized to form copper ions (Cu²⁺). In the reduction half-reaction, chlorine (Cl₂) gains two electrons and is reduced to form chloride ions (Cl⁻). When these two half-reactions are combined, they give the balanced overall equation for the reaction: Cu + Cl₂ → CuCl₂.

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Answer:

About $5.65x10^15 or $5,650,000,000,000,000

Explanation:

Given:

Volume of seawater: 2.3 mL

Grams of gold: 4.0 x 10^-10

Total volume of the ocean: 1.5 x 10^21

Price of gold: $21.66/g

Need:

1000 mL = 1 L

Find:

Dollar worth of all the gold in the world's oceans

Steps:

1. We know that there is 4.0 x 10^10 g of gold in 2.3 mL of seawater, therefore we can write it like this:

2. In order to find the amount of gold in the entire ocean we need to cancel out the 2.3 mL of seawater on the bottom. To do this we will use the volume of the entire ocean (1.5 x 10^21 L). Before we plug it into the equation, we have to match the units of the mL and the L. We will use the 1000mL = 1 L to accomplish this. The formula should now look like this:

\(\frac{4.0*10^{-10}g }{2.3mL} \frac{1000mL}{1L} \frac{1.5*10^{21}L}{1}\)

3. Solve the equation to find the amount of gold in all the oceans:

\(\frac{4.0*10^{-10}g }{2.3mL} \frac{1000mL}{1L} \frac{1.5*10^{21}L}{1} = 2.61 x 10^{14} g\)

4. Now since we found the amount of gold in all the oceans we can use this to find the total worth of all of it. We can do this by multiplying all the grams of the gold by the price of gold per gram. It can be represented like this:

\(\frac{21.66 dollars}{1 gram} \frac{2.61*10^{14}g }{1}\)

5. Get the answer:

\(\frac{21.66 dollars}{1 gram} \frac{2.61*10^{14}g }{1} = 5.65 x 10 ^ {15}dollars\)

There ya go!

Answer:

Pure water has a pH of 7, and, generally, rainfall is somewhat on the acidic side (a bit less than 6). But, acid rain can have a pH of about 5.0-5.5, and can even be in the 4 range in the northeastern United States, where there are a lot of industries and cars.

Explanation:

i hope this helps<3

:)

Benzene treated with Bromine in the prep of lewis Acid Bromo Benzene is formed, After that magnesium metal is used in This Grignard reagent treated with Benzoyl- chloride Benzophenone is synthesized.then Grignard reagent fomeel.

When 1, 1, 2,2, tetraphenyl ethene, on ozonolysis the alkene change into ketone, thus Benzophenone is formed.

Benzoyl chloride is an acyl chloride composed of benzene with one hydrogen replaced by an acyl chloride group. It is an important chemical intermediate for the production of other chemicals, dyes, perfumes, herbicides, and pharmaceuticals.

It acts as a carcinogen. To convert benzene to benzyl chloride he used two techniques. Fielded-Crafts alkylation reaction. Halogenated. There is evidence that α-chlorinated toluene and benzoyl chloride cause lung cancer in humans and benzoyl chloride has been shown to cause skin cancer in animals.

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The Lithium-ion Battery Problem

Overheating. They overheat and explode if charged too fast.

Short life time. They die after less than 1,000 charge/discharge cycles.

Flammable. They use chemicals that are flammable. ...

Toxic. ...

Underperform in extreme temperatures. ...

Expensive casing. ...

Expensive to transport.

The following ionic compounds in order of decreasing melting point, consider the ionic charge and size of the ions involved. Generally, higher charge and smaller ion size lead to stronger ionic bonds and, thus, higher melting points.

Ions are the building blocks of ionic compounds, which are chemical compounds that are bound together by electrostatic forces known as ionic bonding. The overall charge of the chemical is neutral; however, it does include positively charged ions known as cations as well as negatively charged ions known as anions. They may be simple ions like sodium (Na +) and chloride (Cl ), as seen in sodium chloride, or they can be polyatomic species like ammonium.

Explanation :

Here's the ranking:

1. BeO (Beryllium has a 2+ charge and Oxygen has a 2- charge; both ions are relatively small)
2. MgS (Magnesium has a 2+ charge and Sulfur has a 2- charge; ions are larger than in BeO)
3. NaF (Sodium has a 1+ charge and Fluorine has a 1- charge; both ions are small)
4. K2S (Potassium has a 1+ charge and Sulfur has a 2- charge; larger ions than in NaF)
5. CsI (Cesium has a 1+ charge and Iodine has a 1- charge; these are the largest ions)

In summary, the order of decreasing melting points is BeO > MgS > NaF > K2S > CsI.

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Answer:

The answer is

Explanation:

To find the number of atoms in an element given it's number of moles we use the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

n = 7.2 mol

The number of atoms in iron ( Fe) is

N = 7.2 × 6.02 × 10²³

We have the final answer as

Hope this helps you

The process you described, known as hydrolysis, produces three fatty acid molecules and glycerol when a triacylglycerol (a form of fat) combines with water and a strong acid.

Thus, In a chemical reaction known as hydrolysis, a chemical bond is broken by the presence of water.

When it comes to triacylglycerols, the ester bonds between the fatty acid chains and the glycerol molecule are broken, causing the creation of glycerol and the release of three fatty acid molecules. Strong acids are frequently used to catalyze this reaction, which speeds up the hydrolysis process.

Triacylglycerol hydrolysis is a crucial step in the digestion and metabolism of lipids in living things because it enables the breakdown of ingested fats into smaller, more manageable molecules.

Thus, The process you described, known as hydrolysis, produces three fatty acid molecules and glycerol when a triacylglycerol (a form of fat) combines with water and a strong acid.

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Answer:

For no. 3 , B is answer

no.5. Theories are much important in science process as it tells about the process and nature of things object etc. They help for finding new things with their starting nature.

Answer:

the final mole of the flexible container = 12.92 moles

Explanation:

Given that :

initial volume of a flexible container = 6.13 L

initial mole of a flexible container = 6.51 mol

final volume of a flexible container = 18.3 L

final mole of a flexible container = ???

Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.

Therefore,

\(n= \dfrac{V_2*n_1}{V_1}\)

\(n= \dfrac{18.3*6.51}{6.13}\)

n = 19.43

\(n=n_1+n_2\)

19.43 = 6.51 + n₂

n₂ = 19.43 - 6.51

n₂ = 12.92 moles

Thus; the final mole of the flexible container = 12.92 moles

Answer:

1. Elements named after Countries or Places

Americium

Am

Made in 1945 at Chicago USA

Berkelium

Bk

Made in 1950 at the University of California, Berkeley, USA

Californium

Cf

Made in 1950 at the University of California, Berkeley, USA

Copper

Cu

The Romans were the biggest users of copper. Their source of copper was the island of Cyprus. Their name for the island was "Cyprium". They called the metal "Aes Cyprium" - metal of Cyprus. The name became shortened to Cyprium which then became "Cuprum" from which copper gains its modern day symbol.

Francium

Fr

Discovered in 1939 at the Curie Institute, Paris, France.

Gallium

Ga

Named after the Latin name for France - Gallia

Germanium

Ge

Discovered in 1886 by a German Chemist - Winkler.

Polonium

Po

Discovered in 1898 by Marie Curie, who was Polish.

Scandium

Sc

Discovered and mined in Scandinavia

Strontium

Sr

Named after Strontian, a small village in the Western Highlands of Scotland.

__________________________________________________________

4. Elements named after Planets

Helium

He

From the Greek word "Helios" - the Sun. In 1868 during an eclipse of the Sun, Scientists observed a spectral line caused by an unknown element. They named the element Helium. Twenty seven years later in 1895, the element was discovered on Earth.

Neptunium

Np

Named after the planet Neptune. Find the position of the three planets Neptune, Pluto, and Uranus in the Solar system. Now find the position in the Periodic Table of the three elements named after these planets...

Plutonium

Pu

Named after the planet Pluto

Uranium

U

Named after the planet Uranus. The element was discovered in 1789, shortly after the discovery of the planet.

Elements named from Mythology

Tantalum

Ta

Named after the Greek mythological king, Tantalus. It was discovered in 1802 and great difficulties were encountered in dissolving its oxide in acid to form salts. It proved to be a tantalizing problem!

Niobium

Nb

Named after Princess Niobe, the daughter of King Tantalus. According to legend, father and daughter were always found together and were very much alike. The two elements Niobium and Tantalum are usually found together in nature and their properties are very similar. Niobium was discovered in North America in 1801 and was originally named Columbium. It was renamed in 1844 after the connections with tantalum was realized. Find the positions of both elements in the periodic table

Thorium

Th

Named after Thor, the Scandinavian God of War and Thunder. It was discovered and named in 1828. Coincidentally, thorium is used today as a nuclear fuel in nuclear weapons and reactors.

Titanium

Ti

Named after Titans, the Greek supermen. Titanium is an extremely strong metal which resists attack by acids.

Vanadium

V

Named after Vandis, the Scandinavian Goddess of Beauty. The salts of vanadium have beautiful colors.

3. Elements named after Famous Scientists

Curium

Cm

Made in 1944 at Chicago. It was named in honor of Marie and Pierre Curie.

Einsteinium

Es

Made in 1952 at the University of California. It was named in honor of Albert Einstein.

Lawrencium

Lw

All of the man-made elements have been made as a result of the Nuclear Age. The majority of these elements were made at the University of California USA, in a machine called the Cyclotron. The Cyclotron was invented by Professor Ernest Lawrence. Lawrencium was made at the University of California in 1961 and named in his honor.

Mendelevium

Md

Made in 1955 at the University of California. It was named after a world famous Russian Chemist Dimitri Mendeleev.

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

8. The chemical symbol for lead is Pb, which comes from the Latin word plumbum, meaning "waterworks," referring back to ancient times when the metal was widely used in the construction of water pipes.

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The reaction of chloroethane with chlorine to produce 1,1-dichloroethane involves a free radical substitution mechanism. Here is an outline of the mechanism:

Initiation:

Cl₂ (chlorine) undergoes homolytic cleavage upon exposure to UV light, forming two chlorine radicals (Cl·).

Propagation:

Step 1: A chlorine radical (Cl·) reacts with chloroethane (CH₃CH₂Cl), abstracting a hydrogen atom from the ethyl group to form an ethyl radical (CH₃CH₂·) and a molecule of HCl.

Step 2: The ethyl radical (CH₃CH₂·) reacts with a molecule of Cl₂, resulting in the substitution of a chlorine atom for the hydrogen atom, forming 1-chloroethyl radical (CH₃CHCl·).

Step 3: The 1-chloroethyl radical (CH₃CHCl·) reacts with another molecule of Cl₂, leading to the substitution of a second chlorine atom, forming 1,1-dichloroethane (CH₃CHCl₂) and regenerating a chlorine radical (Cl·).

Termination:

The radical intermediates can undergo various termination reactions, combining to form stable molecules, for example:

Combination of two chlorine radicals: Cl· + Cl· → Cl₂

Combination of chlorine and ethyl radicals: CH₃CH₂· + Cl· → CH₃CH₂Cl

Overall, this mechanism demonstrates the step-by-step process by which chloroethane reacts with chlorine to produce 1,1-dichloroethane as the major product through radical substitution reactions.

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Answer:

In order to make the TV function, you need electricity to turn it on. The controller does not do anything with its electricity. The controller only turns on and off the TV and changes its channel. Think of it like a remote controlled or radio controlled car. You cannot use the RC car if there are no batteries in the RC car (also the remote but it already has batteries like a TV's remote controller), just like TV needs electricity in order to turn it on.

Explanation:

Your Question is complete but the options are very much confusing and contradicting. Below you will find the true and full content.

The correct answer for the given question about Enthalpy of vaporisation is ( Volume of liquid in L x 1000 g/L x ΔHvap cal/gm ) where ΔHvap = 540 cal/gm (in case of water).

The amount of energy (enthalpy) required to convert a portion of a liquid into a gas is known as the enthalpy of vaporisation, abbreviated as ΔHvap  and also referred to as the latent heat of vaporisation or heat of evaporation.

Let E be the energy required to calculate the energy required to vaporise a volume of liquid.

Then,

E = Volume of liquid in L x Density of liquid in gm/L  x ΔHvap in cal/gm

and E will came out in calorie.

E = Volume of liquid in L x 1000 g/L x 540 cal/gm --- (in case of water)

Thus we can conclude that to calculate the energy required to vaporise a volume of liquid, we can use the formula with ΔHvap which is E = (Volume of liquid in L x Density of liquid g/L x ΔHvap cal/gm ) and the answer will be in calorie.

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When a hydrocarbon burns in the air it reacts with the active part of the air which is oxygen

carbon and hydrogen atoms in hydrocarbon fuel react with oxygen in an exothermic reaction  carbon dioxide and water are produced

The hydrocarbons can undergo complete or incomplete combustion depending on the amount of oxygen available.

To reduce combustion oxygen must be removed this can be best achieved by using a carbon dioxide fire extinguisher, a fire blanket

Carbon dioxide extinguishes fires by displacing oxygen, or taking away the oxygen element of the fire triangle.

carbon is also very cold as it comes out of extinguisher so it cools the fire as well

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Approximately 73.27% of the present amount of radioactive radium will remain after 515 years (rounded to two decimal places).

To find the percent of the present amount of radioactive radium that will remain after 515 years, you can follow these steps:

1. Use the half-life formula for radioactive decay: A(t) = A0 * (1/2)^(t/T), where A(t) is the amount remaining after time t, A0 is the initial amount, t is the elapsed time, and T is the half-life.

2. In this case, T = 1599 years (half-life of radioactive radium) and t = 515 years. The question asks for the percentage remaining, so you don't need to know the initial amount, A0.

3. Plug in the given values: A(515) = A0 * (1/2)^(515/1599).

4. Calculate the fraction: (1/2)^(515/1599) ≈ 0.7327.

5. Convert the fraction to a percentage: 0.7327 * 100 = 73.27%.

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Answer:

warm water holds the least amount of dissolved oxygen, so I would assume the answer would be D. a small pond could heat up easily. in addition, the water is calm and not moving in a pond