The nuclear reaction shown below is an example of what type of process?22490Th → 22088Rn + 42Hea)fusionb)alpha emissionc)translation

The  work (in joule)  performed on the surrounding  when 1 mole of an ideal gas expanded from a volume of 1. 00 liter to a volume of 8. 93 liter against a constant external pressure of 1. 00 atm is 803 joules

we know that,

n = 1 mole

Vi = 1 L

Vf = 8.93 L

P = 1 atm

the work performed on the surrounding under constant pressure is given as can be calculated as below:

W = P∆V

W = P(Vf—Vi)

W = 1 atm × (8.93—1) L

W = 1 atm × 7.93 L

W = 8.93 Litre•atm

Given that,

1 Litre•atm = 101.3J

So,

W = 7.93 Litre•atm × 101.3J/Litre•atm

W = 803.309 J

W ≈ 803 J

Then the work done on the surrounding is approximately

803 joules

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Answer:

This is because the material of which the football is made up of expands during the day due to hot summer where the particles of it try to move away from each other whereas at night due t less temperature the contract therefore the football feels softer as before

The term used to describe reagents such as NaBH4 which only react with certain functional groups is "chemoselective." Chemoselectivity refers to the ability of a reagent to selectively react with one functional group or a specific type of bond in the presence of other functional groups or bonds.

In the case of NaBH4, it is commonly used as a reducing agent and exhibits chemoselectivity by selectively reducing carbonyl groups (aldehydes and ketones) while leaving other functional groups untouched.

While "functional group selective" is also a valid term, "chemoselective" is more commonly used to describe reagents with this property. The terms "stereoselective" and "regioselective" refer to the selectivity of a reaction based on the stereochemistry or the position of the reaction site, respectively, and are not specific to reactions targeting certain functional groups.

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Answer:

meter or metric system

Explanation:

Acid deposition is the deposition of acidic or acid-forming compounds from the atmosphere into the soil, water, and vegetation, which can lead to significant ecological harm.

The chemicals involved in acid deposition are sulfuric and nitric acids. These acids are formed from the emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) released from the burning of fossil fuels such as coal, oil, and gas.Content loaded sulfuric and nitric acids can react with water vapor in the atmosphere to form sulfuric acid (H2SO4) and nitric acid (HNO3). These acids can be carried by the wind for hundreds of kilometers from their source and deposited onto the earth's surface. The acid deposition can cause a wide range of ecological problems, including the death of fish and other aquatic organisms, the destruction of forests, and the degradation of soil quality.

The problem of acid deposition can be solved by reducing the emissions of sulfur dioxide and nitrogen oxides from the burning of fossil fuels. The adoption of cleaner energy technologies, such as wind and solar power, can help reduce these emissions. In addition, other measures such as the use of scrubbers on power plants to reduce SO2 emissions and the use of catalytic converters on cars to reduce NOx emissions can help to reduce acid deposition.

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A property of water is that it requires less heat than ethanol to raise its temperature.

Among the given options, the property of water that stands out is that it requires less heat than ethanol to raise its temperature. This property is known as the high specific heat capacity of water.

Water has a relatively high specific heat capacity compared to many other substances, including ethanol.

This means that it takes a larger amount of heat energy to raise the temperature of water compared to ethanol for the same mass of the substance.

The high specific heat capacity of water is attributed to hydrogen bonding between water molecules.

These hydrogen bonds result in a significant amount of energy being required to break the intermolecular forces and raise the temperature of water. As a result, water can absorb and store a considerable amount of heat energy without undergoing a significant temperature change.

In contrast, ethanol has a lower specific heat capacity, meaning it requires less heat energy to increase its temperature compared to water.

This property of water plays a vital role in regulating Earth's temperature and climate, as water bodies can absorb and release heat energy, helping to moderate temperature changes in the environment.

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Answer:

a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.

Explanation:

After the death of the Buddha, Buddhism became a formal religion through the efforts of his followers, who continued to spread his teachings and organized into communities known as sanghas. Over time, these sanghas developed a system of governance, with monastic councils, hierarchical structures, and formalized practices and rituals.

One key factor in the formalization of Buddhism was the development of the Tripitaka, a collection of the Buddha's teachings, which were written down in the Pali language and preserved by monastic communities. The Tripitaka contains three major sections: the Vinaya Pitaka, which outlines the rules and guidelines for monastic life; the Sutta Pitaka, which contains the Buddha's discourses on a wide range of topics; and the Abhidhamma Pitaka, which provides a detailed analysis of Buddhist psychology and philosophy.
The spread of Buddhism was also facilitated by the patronage of rulers such as Asoka, who supported the religion and helped to spread it throughout his empire. However, this support was not always consistent, and Buddhism faced periods of persecution and decline in various parts of the world. Despite these challenges, Buddhism has continued to evolve and adapt over the centuries, with different schools and traditions emerging in different regions. Today, Buddhism is practiced by millions of people around the world, and continues to offer a unique and powerful perspective on the nature of reality, the human condition, and the path to liberation.

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Mass of kcl is required to make 55.0 ml of a 0.160 m kcl solution:  0.655 g of KCl is required to make 55.0 mL of a 0.160 M KCl solution.

To determine the mass of KCl required to make a 0.160 M solution in 55.0 mL, we can use the formula:

Molarity = moles of solute / liters of solution

First, we need to rearrange the formula to solve for the moles of solute:

moles of solute = Molarity x liters of solution

We can convert the mL of solution to liters by dividing by 1000:

55.0 mL = 0.055 L

Now we can plug in the values we know:

0.160 M = moles of KCl / 0.055 L

moles of KCl = 0.160 M x 0.055 L

moles of KCl = 0.0088

Finally, we can use the molar mass of KCl to convert the moles to grams:

molar mass of KCl = 74.55 g/mol

mass of KCl = moles of KCl x molar mass of KCl

mass of KCl = 0.0088 mol x 74.55 g/mol

mass of KCl = 0.655 g

Therefore, 0.655 g of KCl is required to make 55.0 mL of a 0.160 M KCl solution.

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The answer is hydroxides.

The elements of the group IA are termed as alkali metals, because their hydroxides are alkaline.

In this case, since the gas is doing work on the surroundings, the sign of work will be negative. The gas is being compressed, which means it is doing work on the surroundings.

Work is defined as the energy transfer due to a force acting through a distance. When the gas is compressed, the piston moves inwards, meaning the force exerted by the gas is in the same direction as the displacement.

According to the convention, work done by a system is considered positive when the force and displacement are in the same direction.

Therefore, in this case, since the gas is doing work on the surroundings, the sign of work will be negative.

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but its c because it dealing with power

Explanation:

Answer:

i

Explanation:

Water and carbon dioxide are byproducts. Notice that photosynthesis and respiration are essentially the opposite of one another. Photosynthesis removes CO2 from the atmosphere and replaces it with O2. Respiration takes O2 from the atmosphere and replaces it with CO2.

The statement is false. Electrodes should not be removed from the sealed protective envelope before use without worry of them drying out.

Electrodes, particularly those used in electrochemical systems, are typically designed to be stored and transported in a sealed protective envelope to prevent them from drying out. The envelope serves as a barrier to moisture and helps maintain the integrity of the electrode. Removing the electrodes from this sealed envelope exposes them to the surrounding environment, which can lead to drying out.

Electrodes are often made of sensitive materials or contain specific electrolytes that require a controlled environment to maintain their performance and stability. By removing the electrodes from their protective envelope, they become susceptible to moisture, air, and other external factors that can potentially affect their functionality and performance. Therefore, it is important to keep electrodes in their sealed protective envelope until they are ready to be used to ensure their optimal performance and longevity.

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Answer:

B) coefficient: subscript

Explanation:

Given

\(3H_2O\)

Required

What does 3 and 2 represents

On a general term:

In \(nA_m\)

\(n = The\ coefficient\ of\ A\)

And

\(m = The\ subscript\ of\ A\)

So, by comparing \(3H_2O\) with the general term, \(nA_m\)

\(n = 3\)

\(m = 2\)

Hence,

3 = coefficient and 2 = subscript

The correct answer is  A) coefficient: superscript.

\(3H_2O\)

  In general:

\(2B_3\)

2 is the coefficient of B, and 3 is the subscript of B.

 So, by comparing  with the given molecule, \(3H_2O\)

3 = coefficient and 2 = subscript

Hence , the correct option is A.

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The half-life of Polonium-210 is 417 days.

We know that the half-life of polonium is 139 days. This means that half of the original amount of polonium will disintegrate every 139 days. Now, suppose that the original amount of polonium is P0. After 139 days, half of the amount will be disintegrated. This means that the amount remaining is P0/2. Again, after another 139 days, half of the remaining amount will disintegrate. This means that the amount remaining will be P0/4. Similarly, after 3 half-lives, which is 3 x 139 = 417 days, the amount remaining will be:

P0/2³ = P0/8

This means that 7/8 of the original amount of polonium has disintegrated.

Therefore, 95% of the original amount has disintegrated after 139 days x (3 + 0.2)

half-lives = 417 days.

Therefore, the duration for which you will be able to use the polonium after the sample arrives is 417 days.

The question you wrote is incomplete, maybe the complete question is:

Polonium-210

The half-life of polonium is 139 days, but your sample will not be useful to you after 95% of the radioactive nuclei present on the day the sample arrives has disintegrated. For about how many days after the sample arrives will you be able to use the polonium?

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Answer:

inertia is the tendency of an object to resist a change

The relationship between the number of atoms attached to the central atom and the resulting molecular shape can be described by VSEPR theory.

The valence-shell electron-pair repulsion theory (VSEPR) suggests that the geometric arrangement of atoms around a central atom in a molecule is determined by the electrostatic repulsion between the valence electron pairs in the atoms forming the molecule.

Valence Shell Electron Pair Repulsion (VSEPR) theory is a model used to predict the three-dimensional geometry of a molecule, which is essential for understanding the molecule's properties and reaction mechanisms.

According to this theory, the arrangement of atoms around a central atom is determined by minimizing the repulsion between the pairs of valence electrons. In other words, the geometry of a molecule is determined by the arrangement of electron pairs surrounding the central atom.

Therefore, the number of atoms connected to the central atom and the position of these atoms (i.e., lone pair or bonding pair) determine the geometry of the molecule.

For example, the linear molecule of carbon dioxide has two oxygen atoms attached to the central carbon atom, resulting in a linear arrangement of atoms. The tetrahedral arrangement of four atoms is produced by a central carbon atom bonded to four hydrogen atoms in methane.

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The cell supplies the potential energy

The bulbs become weaker

The brightness of the bulbs will increase

In a simple series circuit, there are two components connected in series, such as a resistor and a battery. When a voltage is applied across the circuit, the current flows through the resistor and then through the battery, in a continuous loop.

The voltage across the resistor is proportional to the current and the resistance of the resistor, according to Ohm's law, while the voltage across the battery remains constant.

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Answer:

1) AgNO3 (aq) + KCl (aq) -> AgCl (s) + KNO3 (aq)

Ag+ (aq) + NO3- (aq) + K+ (aq) + Cl- (aq) -> AgCl (s) + K+

(aq) + Cl- (aq)

Ag+ (aq) + Cl- (aq) -> AgCl (s)

2) 2NaCl (aq) + K2CO3 (aq) -> Na2CO3 (aq) + 2KCl (aq)

3) Fe(NO3)3 (aq) + 3NaOH (aq) -> Fe(OH)3 (s) + 3NaNO3

(aq)

Fe³+ (aq) + 3NO3- (aq) + 3Na+ (aq) + 3OH- (aq) ->

Fe(OH)3 (s) + 3Na+ (aq) + 3NO3- (aq)

Fe³+ (aq) + 3OH- (aq) -> Fe(OH)3 (s)

4) BaBr2 (aq) + Na2SO4 (aq) -> BaSO4 (s) + 2NaBr (aq)

Ba²+ (aq) + 2Br- (aq) + 2Na+ (aq) + SO4²- (aq) ->

BaSO4 (s) + 2Na+ (aq) + 2Br- (aq)

Ba²+ (aq) + SO4²- (aq) -> BaSO4 (s)

Explanation:

Sorry, I couldn't make the charges superscript. Don't know how.

On #2, no reaction occurs; everything stays aqueous.

In the periodic table the lanthanoid and the actinides are place separately at the bottom because of their electronic configuration and their properties compared to the other elements.

The  the lanthanoid and the actinides are place separately at the bottom in the periodic table due to their electronic configuration and the properties. and to make the periodic table more convenient . if we place the f block elements that is he lanthanoid and the actinides then the size of the periodic table will increase. the f block elements are called as the inner transition element.

Thus , to make the periodic table more convenient and to group the elements in the block the the lanthanoid and the actinides are place separately at the bottom.

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Matter is anything that has mass and occupies space. Matter can exist in three forms or phases: solids, liquids, or gases.  A tiny particle of a chemical element is called an atom while Molecules refer to the group of atoms. Compounds can be broken down into elements by chemical reactions, but elements cannot be separated into simpler substances by chemical means.

Atoms are made up of three types of tiny particles. Protons (or positively charged particles) and neutrons (or particles that contain no charge) are found in the nucleus of an atom. Electrons (or negatively charged particles) are found outside the nucleus. A molecule can be defined as the combinations of two or more atoms which are held together by chemical bonds. A molecule is the smallest portion of a substance which showcases all the properties of the substance. If the molecule contains atoms of different types bonded together, we call it a compound. Element any substance that cannot be decomposed into simpler substances by ordinary chemical processes.

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Fe2S3 is The Empirical Formula Of A Compound Containing 53.70% Iron And 46.30% Sulfur.

Fe = 0.961 mol and S = 1.44 mol, Now divide them to get lowest empirical formula. When the subscripts in a chemical formula represent the simplest ratio of the kinds of atoms in the compound, the formula is called an empirical formula.

Most ionic compounds are described with empirical formulas. A molecular formula describes the actual numbers of atoms of each element in a molecule. A compound that contains ions and is held together by ionic bonds is called an ionic compound. The periodic table can help us recognize many of the compounds that are ionic:

When a metal is combined with one or more nonmetals, the compound is usually ionic. This guideline works well for predicting ionic compound formation for most of the compounds typically encountered in an introductory chemistry course. However, it is not always true (for example, aluminum chloride, AlCl3, is not ionic).

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Option 1 is correct. There are three types of UV radiation: UVA, UVB, and UVC. UVC has the shortest wavelength, around 100-280 nm, but is mostly absorbed by the Earth's atmosphere and doesn't reach the surface. UVB has a wavelength of 280-320 nm and is responsible for sunburns and skin damage. UVA has the longest wavelength, around 320-400 nm, and can penetrate deeper into the skin, causing aging and wrinkling.

Option 2 is incorrect because UV radiation, in general, can be damaging to the Earth's surface, causing skin cancer, harming plant life, and contributing to climate change.

Option 3 is partially correct because UV radiation with a wavelength of 300 nm falls within the UVC range, but it's important to note that this type of radiation is mostly absorbed by the ozone layer before reaching the Earth's surface.

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Answer:

There are 3 elements, Sodium, Carbon, and oxygen. There are 2 Sodium atoms 2*2=4, one carbon, and 3 Oxygen so 4+1+3=8 total atoms. one compound CO3  

Explanation:

that's all I know

Answer:

filtration and Chromatography

Explanation:

The first method used for separation of solids from the mixture is filtration. Filtration is used to separate different solids in a mixture which has particles of different sizes. Other method is Chromatography in which the compounds in the mixtures are separated from each other by moving the mixture at high speed. Due to high speed, the compounds are separated from each other because different compounds have different speeds so it is separated easily.

Answer:

The mole allows scientists to calculate the number of elementary entities (usually atoms or molecules ) in a certain mass of a given substance. Avogadro's number is an absolute number: there are 6.022×1023 elementary entities in 1 mole. This can also be written as 6.022×1023 mol-1.

Explanation: