A merry-go-round moves in a circle at a constant speed. Is the merry-go-round accelerating? Explain your answer.

Answer: a. nitrogen

Explanation:

Nitrogen comprises of five valence electrons in its outermost shell which enables it to form triple, double and single bonds with other atoms. It can share three electrons with other nitrogen atom and form a covalent bond. Moreover, nitrogen can form multiple bonds with itself and with other elements due to its small size and high electronegativity. Nitrogen, carbon, fluorine, and oxygen are the elements with which nitrogen can form bonding.

To calculate the amount of silver that will precipitate, we need to use Faraday's laws of electrolysis, which relate the substance produced or consumed in a cell to the amount of electric charge passed through it.

The first law of electrolysis states that the amount of substance produced or consumed in an electrolytic cell is proportional to the amount of electric charge passed through the cell. The proportionality constant is known as the Faraday constant, which is equal to 96,485 coulombs per mole of electrons.

The second law of electrolysis states that the amount of different substances produced or consumed in an electrolytic cell is proportional to their respective chemical equivalents.

In this problem, the substance being produced is silver, which has a chemical equivalent of 1 (i.e., one mole of electrons produces one mole of silver). The electric charge passed through the cell can be calculated as follows:

electric charge = current x time

electric charge = 5 A x 2.5 hours x 3600 s/hour

electric charge = 45,000 C

The amount of silver that will precipitate can be calculated using the first law of electrolysis and the Faraday constant:

moles of silver = electric charge / Faraday constant

moles of silver = 45,000 C / 96,485 C/mol

moles of silver = 0.467 mol

To convert moles of silver to mass, we need to know the molar mass of silver. The molar mass of silver is 107.87 g/mol. One teaspoon is approximately 5 mL.

mass of silver = moles of silver x molar mass

mass of silver = 0.467 mol x 107.87 g/mol

mass of silver = 50.4 g

number of teaspoons = mass of silver / (density of silver x volume of teaspoon)

Assuming the density of silver is 10.5 g/mL, we get:

number of teaspoons = 50.4 g / (10.5 g/mL x 5 mL)

number of teaspoons = 0.96 teaspoon

Therefore, approximately 0.96 teaspoons of silver will precipitate.

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Answer:

6 atoms

Explanation:

Hey there!

To find out how many atoms are in this compound, we have to add up all of the atoms

2H means there are 2 atoms

Then we have Cl which is 1 more atoms

Last, we have O₃ which gives us 3 atoms

Now we do basic math:

2 + 1 + 3 = 6

So there are 6 atoms in this compound

Answer:

what do I need to do?..

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Feather or bone when fall into food causing Physical  contamination.

Food waste, like a feather or a bone etc fall into food causing Physical  contamination because the contaminants such as feather and bone are mixed in the food physically not chemically. These contaminants can be removed through physical means such as with the help of hand.

Some contaminants mix with the food chemically means they react with the food and produce something new. Such type of contaminants are present in liquid form so we can conclude that feather or a bone etc when fall into food causing Physical  contamination.

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Answer:

The smallest atomic unit which maintains the physical properties of a compound is called a molecule.

Explanation:

A molecule is the smallest unit of a compound that can exist independently and still retain the properties of that compound. It is made up of two or more atoms that are bonded together, and it is the basic unit of a chemical compound. The atoms in a molecule are held together by chemical bonds, which are the attractive forces that hold the atoms together. Molecules can be made up of different types of atoms, and the type and arrangement of atoms in a molecule determine the properties of the compound.

The three components of light Nature combines the soft, scattered light from the sky with the vibrant, focused light from the sun. Units are Candela, Lumen, Lux.

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The electrons in an orbital with l = 3 are in an f orbital.

The value of l corresponds to the angular momentum quantum number, which determines the shape of the orbital. For l = 3, the shape of the orbital is a complex, multi-lobed structure that is characteristic of an f orbital.

The other options, such as d, p, g, and s orbitals, correspond to values of l that are less than or equal to 2. These orbitals have simpler, more symmetrical shapes that are different from the f orbital. Therefore, the correct answer is b) f orbital.

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The factors that favor SN2 (substitution nucleophilic bimolecular) reactions are:

b) Strong nucleophile, good leaving group, polar aprotic solvent, methyl or primary halide.

Strong nucleophile: the more nucleophilic the attacking species, the more likely it is to participate in an SN2 reaction.

Good leaving group: a better leaving group will dissociate more easily from the carbon atom, facilitating the nucleophilic attack.

Polar aprotic solvent: this type of solvent allows for the solvation of the nucleophile, but it does not interfere with the reaction mechanism, which favors the bimolecular nature of the reaction.

Methyl or primary halide: these types of halides have a less hindered environment around the carbon atom, making it easier for the nucleophile to approach the carbon and displace the leaving group.

Therefore, option b) is the correct answer. Options a), c), d), and e) contain at least one factor that is not favorable for SN2 reactions.

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Wine was produced 37 years ago (1984 as usual year 15,2021) that is shown in the calculations below.

Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt. The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.

The time can be represented as follows:

t= 2.303\∧ log A0/A

∧= 0.693/t 1/2

The rate of a reaction is proportional to the reciprocal of the time taken. Rate α 1 time Rate is inversely proportional to time. Units: s-1, min-1 etc.

The given parameters are as follows:

t1/2=12.3

A0=5.5

A=0.688

t= 2.303/(0.693/12.3) log (5.5/0.688)

t=36.9

t=37 years

Thus, wine was produced 37 years ago (1984 as usual year 15,2021)

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Answer:

C

Explanation:

Dalton's atomic theory are: Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. The atoms of different elements vary in size and mass.

Dalton's atomic theory opines that atoms of the same element are identical in size, mass, and other properties and are different from atoms of other elements.

In addition, Dalton theorized that atoms can neither be created nor destroyed, and they are the smallest indivisible particle of elements.

He also proposed that atoms of different elements are also able to combine in whole number ratio to form compounds.

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According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;

where;

V1 and V2 are the initial and final volume of the gas

T1 and T2 are the initial and final temperatures of the gas (in Kelvin)

Given the following parameters:

Substitute the given parameters into the formula;

Therefore the volume of the gas at 20°C is approximately 97.67cm³

All the statements about the Lewis structures are correct. An ionic bond is formed by sharing of electrons and covalent bonds are formed by the transfer of electrons. A duet is stable EC of He and an octet has a valence electrons of 8.

An atom can establish bonds with other atoms in two main ways: covalent and ionic. The sharing of electrons between two or more atoms forms a covalent connection. When two or more ions join contact, they can create ionic bonds that are held together by charge differences.

Eight electrons make up the outermost shell of an octet. Two electrons make up the duplet's outermost shell. The final electron configuration of the octet is ns2 np6. The end of the duplet has an ns2 configuration.

So all the statements are correct about Lewis structure and none of them are false.

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Answer:hey man hey man

Explanation:

ooo she fine  

When you get into a car that has been sitting in the sun for a while, there are several noticeable things that may occur. Here are some of the common observations:

1. Heat: One of the first things you'll notice is the intense heat inside the car. This is because the sun's rays have been absorbed by the car's exterior and trapped inside, creating a greenhouse effect. The temperature inside the car can become significantly higher than the temperature outside.

2. Hot Surfaces: The surfaces inside the car, such as the seats, dashboard, steering wheel, and metal parts, can become extremely hot to the touch. This is due to the absorption of heat from the sun. It's important to be cautious and avoid direct contact with these hot surfaces to prevent burns or discomfort.

3. Odor: The interior of the car may have a distinct smell when it has been sitting in the sun for a while. This is often referred to as the "hot car smell." It is caused by the combination of materials, such as upholstery, plastic, and carpet, heating up and emitting a specific odor.

4. Fading or Discoloration: Prolonged exposure to sunlight can cause fading or discoloration of materials inside the car. For example, the upholstery, dashboard, and other surfaces may gradually lose their original color and become faded or discolored over time.

5. Glare: When you first enter a car that has been sitting in the sun, you may notice a strong glare from the sunlight reflecting off the windshield and other glass surfaces. This glare can make it difficult to see clearly and may require the use of sunglasses or adjusting the sun visors to minimize the brightness.

It's important to note that these observations may vary depending on factors such as the intensity of the sunlight, the duration the car has been in the sun, and the materials used in the car's interior. Regular maintenance and taking precautions, such as using sunshades or parking in shaded areas, can help minimize some of these effects.

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Oxygen is indeed a gas under normal circumstances. However, the gas transforms into a liquid or a solid at low temperatures and/or high pressure. The air has 0.21 atm of oxygen in it.

The energy-producing process that powers the metabolism rate of most living organisms, respiration, depends heavily on oxygen. All living things, including humans, depend on the air that we breath to survive.

Oxygen is produced by cyanobacteria, algae, and plants. Photosynthesis is how they accomplish this. They convert both water and carbon dioxide create glucose and oxygen using the sunlight's energy. The sugars are used in their diet. Oxygen has small intermolecular forces.

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The number of spoonfuls required to cover a specific area could then be counted to estimate the total number of sand grains.

This method would likely lead to an estimate rather than an exact count, as the number of grains in each spoonful may vary. Another idea is to use a smaller measuring spoon, such as a teaspoon or a tablespoon, and count the number of spoonful's required to fill a container of known volume.

By dividing the total volume of the container by the volume of one spoonful, an estimate of the total number of sand grains could be obtained. This method could also lead to an estimate due to variations in the size of the grains and the accuracy of the measuring spoon.

To improve these ideas, a more precise measuring device, such as a scale, could be used to measure the exact weight of the sand. This would provide a more accurate count of the number of sand grains, rather than relying on estimates based on volume or area.

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An ionic salt, is more soluble in water

Polar substances  are generally more soluble in water compared to nonpolar substances. This is because water is a polar solvent, meaning that it has a partial positive charge on one end and a partial negative charge on the other end due to the asymmetric arrangement of its atoms.

Polar substances also have a partial positive and partial negative charge on different parts of their molecules, which allows them to interact with water molecules through electrostatic interactions,

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The mass of the Pt(s) electrode remains the equal because the Pt does now not react and no Cu atoms could be deposited at the Pt electrode.

Mass is a fundamental physical property that refers to the amount of matter in an object. It is a measure of the number of atoms, molecules, or particles that make up an object or substance. Mass is typically measured in grams (g) or kilograms (kg), and it is different from weight, which is a measure of the gravitational force exerted on an object.

In chemical reactions, the mass of reactants must be equal to the mass of the products, according to the law of conservation of mass. This means that the total mass of all substances involved in a chemical reaction remains constant, regardless of any physical or chemical changes that may occur. The mass of an atom is typically expressed in atomic mass units (amu), which are defined relative to the mass of a carbon-12 atom. The mass of a molecule is the sum of the masses of all its constituent atoms.

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The two processes that help to preserve food are; storing properly in the refrigerator  as well as blanching and canning.

Enzymes are biological catalysts that promote several reactions in the body. The spoilage of food is affected by the enzymes present in food. They act slowly, causing the food to spoil.  

However, there are two way to protect a food from spoilage. These are;

These processes slow down the action of these enzymes that are responsible for the spoilage of food thereby enabling the food to last longer.

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Answer: Balanced forces

Explanation: Equal forces acting in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object's motion.

The density of the metal has the high inherit percentage of error than the value for the liquid because the possibility error in measuring the volume of the solid is more than the liquid.

The density is expressed as follows :

Density = mass / volume

The volume of the solid cannot be measure directly. The volume of the solid can be measured by immersing the solid in to the liquid and then we measure the volume of the liquid displaced. The possibility error in measuring the volume of the solid, especially when the shape of the solid is irregular, is more than the liquid.

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A pressure saucepan, also known as a pressure cooker, reduces cooking time by increasing atmospheric pressure inside the cooking vessel. This is achieved by sealing the pot tightly and trapping steam generated from boiling liquids and food. The increased pressure raises the boiling point of water, allowing food to cook at higher temperatures than normal. Options 1 and 3 are correct.

Option 1: Increasing atmospheric pressure is correct because the sealed pressure cooker traps steam, which increases the pressure inside the pot. The increased pressure raises the boiling point of water, resulting in faster cooking times.

Option 2: Decreasing atmospheric pressure is incorrect because pressure cookers work by increasing pressure, not decreasing it.

Option 3: Increasing vapor pressure is correct because as the pressure inside the pressure cooker increases, the vapor pressure of water also increases. This higher vapor pressure enables the food to cook more rapidly.

Option 4: Decreasing vapor pressure is incorrect because the pressure cooker actually increases the vapor pressure by raising the overall pressure inside the pot.

Option 5: Ionizing the added salt is unrelated to the operation of a pressure cooker and does not contribute to the reduction in cooking time.

Hence, a pressure saucepan reduces cooking time by increasing the atmospheric pressure and vapor pressure inside the pot.

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To determine the number of grams of H₂O produced from 8.53 x 10²³ molecules of O2, we need to use the balanced chemical equation for the reaction that occurs.
The balanced equation for the reaction between O2 and H2 to produce H₂O is:
+2H2 + O2 → 2H₂O

From this equation, we can see that for every 1 molecule of O2, 2 molecules of H₂O are produced. Therefore, we need to calculate how many moles of O2 are present in 8.53 x 10²³ molecules and then use the mole ratio from the balanced equation to determine how many moles of H₂O are produced. Finally, we can convert moles of H₂O to grams using the molar mass of water.

To calculate the number of moles of O2 present in 8.53 x 10²³ molecules, we need to use Avogadro's number.
Number of moles of O2 = (8.53 x 10²³ molecules) / (6.022 x 10²³ molecules/mol)
Number of moles of O2 = 1.42 mol
Using the mole ratio from the balanced equation, we know that 2 moles of H₂O are produced for every 1 mole of O2. Therefore, the number of moles of H₂O produced is:
Number of moles of H₂O = (1.42 mol O2) x (2 mol H₂O / 1 mol O2)
Number of moles of H₂O = 2.84 mol H₂O

Finally, we can convert moles of H₂O to grams using the molar mass of water:
Mass of H₂O = (2.84 mol H₂O) x (18.015 g/mol)
Mass of H₂O = 51.15 g
Therefore, 8.53 x 10²³ molecules of O2 produce 51.15 g of H₂O.

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Answer:

electron affinity: this is the energy released when a gaseous atom gains an electron to form a gaseous negative ion. electron affinity increases across the period and down the group

Electronegativity: the electronegativity of an atom is a power of that atom in a molecule to attract electron. the electronegativity values are plotted against atomic number. the electronegativity of element increases across the period but decreases down the group

Answer:

The correct answer is B.

Explanation:

I hope this helps. :)

1.47 J/g°C is the specific heat capacity of a 70 g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

q = mCpΔT

Solve for Cp —> Cp = q/mΔT

q = -6700 J (negative because it released heat)

m = 70 g

ΔT = Final temp - initial temp = 25 - 90 = -65°C

Cp = (-6700 J) ÷ (70 g)(-65°C)

= 1.47 J/g°C

Hence, 1.47 J/g°C is the specific heat capacity of a 70 g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C.

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Answer:

The differences between them are as follows :-

1.kinetic energy is the energy possessed by an object by virtue of it being on its motion.

1.electrostatic force is the energy possessed by an object by virtue of it being on its position.

2.kinetic energy symbol is KE.

2.electrostatic force symbol is PE.