Statement
1. Angelfish has swirl patterns of black and white
2. Angelfish swimming in large schools
3. Male parrotfish 1.3 meters in length
4. Male parrotfish has large scales and scar near base of
tail fin
5. Scar on parrotfish may have been caused by a bite from
another fish
6. Brain coral over 2 meters in circumference
7. Parrotfish is afraid of brain coral because the fish will
not touch the coral
3. Sea anemone have purple tipped tentacles
9. My hand brushed up against sea anemone tentacle and
it began to hurt
10. Sea anemone tentacles have an average length of 7 cm
11. Most of the sand near the coral reef has been washed
away by the tide
12. Few divers visit this coral reef because there is no litter
near it
Inference
Quantitative Qualitative
Observation Observation

Answer:

1.74 g/mL

Explanation:

Step 1: Given data

Mass of magnesium: 4.80 g

Volume of water displaced: 2.76 mL

Step 2: Calculate the volume of the piece of magnesium

The volume of the piece of magnesium is equal to the volume of water displaced in the graduated cylinder.

Step 3: Calculate the density of magnesium

The density of magnesium is equal to its mass divided by its volume.

ρ = m / V

ρ = 4.80 g / 2.76 mL

ρ = 1.74 g/mL

Answer:

C

Explanation:

Melting point, temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change.

Answer and Explanation:

There are 7 base units, m is one of them. Any unit made up of a combination of them is a derived unit. Also, any unit that is defined to be equivalent to a combination of base units is a derived unit.

Answer:

Shortest distance between 2 points is called displacemen.

Explanation:

This is because displacement means the distance between 2 points or really the negative distance.

Answer:

acceleration goes on increasing during uniform motio

this is wrong

Explanation:

Because during uniform motion acceleration is always zero .

There is the formation of intermolecular hydrogen bonding in ethanol as shown in the model below.

Intermolecular interactions can arise when ethanol, a common alcohol, is liquid. These interactions result from the ethanol molecule's polarity and hydrogen bonding propensity.

Two carbon atoms, five hydrogen atoms, and one oxygen atom make up the compound ethanol (C2H5OH). Because the oxygen atom is more electronegative than the carbon and hydrogen atoms, they are bound together by a polar covalent bond.

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Answer:

The atom

Explanation:

Quarts of pure antifreeze must be added to 5 quarts of a 20 antifreeze solution to obtain a 50 antifreeze solution is 3.

Antifreeze solution is a solute that lowers the freezing point of the liquid in a solution.

For calculating the amount of quarts of pure antifreeze solution added can be given by:

5×20/100 + x × 100% = (x+5) × 50/100

Where, x is the amount of antifreeze required for addition and pure antifreeze is 100% of the antifreeze taken.

1 + x = (x+5) 0.5

1 + x = 0.5x + 2.5

0.5x = 1.5

x = 3

So, 3 quarts of pure antifreeze must be added to 5 quarts of a 20 antifreeze solution to obtain a 50 antifreeze solution.

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Hydrogen Bonding is the strongest of the intermolecular forces because it is the attraction of the positively charged end of one molecule to the negatively charged end of another molecule.

Molecules are the smallest particles of matter that have all of the chemical properties of an element or compound. They are made up of two or more atoms held together by chemical bonds. Molecules can be made of different types of atoms and can vary in size, shape and structure. They are an essential part of all living organisms and are responsible for the formation of many chemical reactions.

1. Hydrogen Bonding

2. Dipole-Dipole Interactions

3. London Dispersion Forces

4. Ion-Dipole Interactions

Rank from weakest to strongest IMF:

3. London Dispersion Forces

2. Dipole-Dipole Interactions

4. Ion-Dipole Interactions

1. Hydrogen Bonding

London Dispersion Forces are the weakest of the intermolecular forces because they are a temporary attraction of the electrons of the atoms of two different molecules. Dipole-Dipole Interactions are slightly stronger than London Dispersion forces because they are the attraction of a positive end of one molecule to the negative end of another molecule. Ion-Dipole Interactions are stronger than Dipole-Dipole Interactions because they are the attraction of an ion to the oppositely charged end of a molecule. Finally, Hydrogen Bonding is the strongest of the intermolecular forces because it is the attraction of the positively charged end of one molecule to the negatively charged end of another molecule.

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Answer:

see below

Explanation:

1. Insulator

2. conductor

3. Insulator

4. conductor

an Insulator is something that keeps the cold/heat in a place. like when a house is being built, they will place insulation in the walls to keep the heating and cooling inside. same concept as in example 1.

a conductor is when something is conducting heat or cold. when the spaghetti in scenario 2 is cooking, it is conducting heat from the boiling water.

Answer:

Explanation:

Their role is to compose proteins. Amino acids have many biologically important functions. They are also energy metabolites,many of them are essential nutrients. Amino acids can  function as chemical messengers in communication between cells.

Answer:

well Aside from their role in composing proteins, amino acids have many biologically important functions. They are also energy metabolites, and many of them are essential nutrients. Amino acids can often function as chemical messengers in communication between cells.

Explanation:

this should be the answer

Answer:

6,75 kilometres per hour

Answer:

d

Explanation:

The train will travel for 2 hours to travel a distance of 100 miles with a speed of 50m/h. Therefore, option (C) is correct.

The speed of a body is defined as the rate of change in the position of a body w.r.t. time.

Speed is a scalar parameter with both magnitude and no direction. A simple mathematical formula common way to determine speed.  

S = d / t

where S is the speed, d is the distance moved by a body and t is the time.

Although the SI unit for speed is the same as velocity is m/s and can also be expressed in miles per hour (mph), and kilometers per hour (kph).

Given, the distance traveled by train, d = 100 miles

The time taken by train = 2 hrs

The speed of the train = distance/ time = 100/2 = 50m/h

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The mass of the moist air is calculated by multiplying the number of molecules of each component by their respective molar masses and summing them up. In this case, the total mass is 374 grams.

To calculate the mass of moist air, we need to determine the molar mass of each component and then calculate the total mass.

Molar mass of Nitrogen (N2) = 2(N) = 2(14 g/mol) = 28 g/mol

Molar mass of Oxygen (O2) = 2(O) = 2(16 g/mol) = 32 g/mol

Molar mass of Water Vapor (H2O) = 2(H) + 16(O) = 2(1 g/mol) + 16 g/mol = 18 g/mol

Now, let's calculate the total mass of the given molecules:

Number of Nitrogen molecules = 8

Number of Oxygen molecules = 3

Number of Water Vapor molecules = 3

Total mass = (8 molecules)(28 g/mol) + (3 molecules)(32 g/mol) + (3 molecules)(18 g/mol)

Simplifying the equation:

Total mass = 224 g + 96 g + 54 g

Total mass = 374 g

Therefore, the mass of the moist air with the given composition is 374 grams.

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Answer:

Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.

Explanation:

I hope it's useful for u...

Thank you

Answer:

Los padres transmiten rasgos o características, como el color de ojos y el tipo de sangre, a sus hijos a través de sus genes. Algunas condiciones de salud y enfermedades también pueden transmitirse genéticamente. A veces, en

Answer:

c .

Explanation:

Answer:

c

Explanation:

The student should take the average of the results from all four trials to obtain the highest level of accuracy.

Chemistry's definition of accuracy is how closely a measurement resembles the actual value.

Three categories of accuracy exist:

1) Point accuracy signifies that accuracy is present only at that scale point.

It provides no details regarding the instrument's accuracy.

2)Percentage of true value - The accuracy is assessed by identifying the instrument's accuracy and contrasting it with the true value that was measured.

3)Percentage of scale range – The accuracy is what determines the measurement's accuracy.

Up to 0.5 percent of instrument accuracy is disregarded. By taking multiple measurements and accounting for human error, measurement accuracy can be improved.

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An electron with a negative energy is attached to the nucleus by the attraction between its opposing charges. The closer it is to the nucleus, the more closely connected it is. The farther an electron is from the nucleus, the greater its energy. The correct option is B.

The electron's energy grows as it goes away from the nucleus and gets less and less negative. When the electron is not subject to the nucleus's attracting Coulomb attraction, it has zero potential energy and only kinetic energy, which is always positive. The electron has greater energy the further it travels.

On the other hand, the nucleus's weak forces of attraction hold electrons that are moving away from it.

Thus the correct option is B.

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To find the acceleration of the electron, we can use the formula for centripetal acceleration, which is given by a = v^2/r, where v is the speed of the electron and r is the radius of the circle. The acceleration of the electron in this model is 9.00 x 10^22 m/s^2.

Plugging in the values given in the problem, we get:

a = (2.18×10^6 m/s)^2 / (5.28×10^-11 m)
a = 9.03×10^22 m/s^2

Therefore, the acceleration of the electron in this model is 9.03×10^22 m/s^2.

In the given model of the hydrogen atom, an electron orbits a proton in a circle of radius 5.28 x 10^-11 m and has a speed of 2.18 x 10^6 m/s. To find the acceleration of the electron, we can use the centripetal acceleration formula:

Centripetal acceleration (a) = (v^2) / r

where:
v = speed of the electron (2.18 x 10^6 m/s)
r = radius of the orbit (5.28 x 10^-11 m)

Now, let's calculate the acceleration:

a = (2.18 x 10^6 m/s)^2 / (5.28 x 10^-11 m)

a = 4.7524 x 10^12 m^2/s^2 / 5.28 x 10^-11 m

a = 9.00 x 10^22 m/s^2

So, the acceleration of the electron in this model is 9.00 x 10^22 m/s^2.

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The study of matter and chemical reactions in the body is known as "biochemistry."

Biochemistry combines principles of biology and chemistry to understand the chemical processes and molecular interactions that occur within living organisms. It focuses on the structure, function, and metabolism of biomolecules such as proteins, carbohydrates, lipids, and nucleic acids, as well as the chemical reactions and pathways that drive cellular processes. By studying biochemistry, scientists can gain insights into the mechanisms of biological systems and explore the relationships between molecular structure and function in living organisms. It provides insights into the molecular mechanisms of diseases, drug interactions, enzyme kinetics, and the development of novel therapeutic interventions. Overall, biochemistry plays a crucial role in unraveling the chemical basis of life and advancing our understanding of living organisms at the molecular level.

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Answer:

The Answer is Yes, as all of these compounds are covalent since they are not conductive.

Explanation:

.

According to the concept of conduction, only ionic compound can conduct electricity that in aqueous state.

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:

1) heat conduction

2) electrical conduction

3)sound conduction

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Answer:

I think the answer is distilled water...

Explanation:

Ionic bonds are a type of bond formed with the attraction between oppositely charged ions to form a chemical compound, this type of bond will have a transfer of electrons, from the positively charged ion (cation) to the negatively charged ion (anion). Since this type of bonding heavily depend on the electronegativity of the elements, we will have compounds formed with metals, located more to the left in the periodic table, mostly group 1 and 2, and with nonmetals, more to the right in the periodic table, one example of this type of bond is Chlorine (nonmetal anion) and Lithium (metal cation).

Covalent bonds are a type of bond formed with the sharing of electrons between two elements with no big difference in their electronegativity, usually, we will see nonmetals in this type of bond, since their difference in electronegativity is not as relevant as the difference between metals and nonmetals, one example of this type of chemical bond is Nitrogen and Oxygen, 2 nonmetals that can bond together.

Metallic bond, as the name suggest, is a type of bond that will strictly involve metals and not nonmetals, this type of bond has many properties but the low electronegativity in general is one of these properties, one example for this bond is Gold and Gold

Therefore the answers are:

Gold and Gold = metallic

Nitrogen and Oxygen = covalent

Chlorine and Lithium = ionic

The air pollution that forms primarily from car exhaust in the presence of sunlight is called photochemical smog.

Photochemical smog is a type of air pollution that is formed when pollutants, particularly nitrogen oxides (NOₓ) and volatile organic compounds (VOCs) emitted from car exhaust and industrial emissions, react in the presence of sunlight. It is characterized by the presence of a brownish haze and the formation of various secondary pollutants, such as ozone (O₃) and peroxyacyl nitrates (PANs).

The formation of photochemical smog involves complex chemical reactions. Sunlight provides the energy needed to drive these reactions, which can lead to the production of highly reactive compounds like ozone. These reactions typically occur in urban areas with high traffic and industrial activity, where emissions from vehicles and other sources are abundant.

Photochemical smog is known to have detrimental effects on human health and the environment. It can contribute to respiratory problems, eye irritation, and the formation of ground-level ozone, which is harmful to both human health and vegetation. To mitigate photochemical smog, efforts are made to reduce emissions from vehicles, control industrial pollution, and implement air quality regulations.

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Answer:

solvent

Explanation:

Water dissolves the substances, which become the solutes in the solution.

Compound A is likely an organic halide, Compound B is a derivative of benzene, Compound C is benzene itself, and Compound C can be converted into toluene through a Friedel-Crafts alkylation reaction.

i) Compound A is an alkene.

When heated with silver powder, it undergoes oxidative cleavage to produce Compound B which is an aldehyde.

So the IUPAC names of Compound A and Compound B are ethene and ethanal, respectively.

ii) The acidic nature of Compound B can be proved by treating it with sodium hydrogen carbonate. If effervescence occurs, it is due to the evolution of carbon dioxide gas.

This indicates that Compound B is acidic in nature and reacts with a base to form salt and water.

iii) When Compound C (Benzene) reacts with bromine in the presence of catalyst FeCl3, Bromine water is decolorized to form a colorless solution.

This is an addition reaction that occurs due to the presence of an electron-rich benzene ring.

iv) Compound C (Benzene) can be converted into Toluene (Methylbenzene) through a process known as Friedel-Crafts Alkylation, where Benzene is allowed to react with Chloromethane (Methyl chloride) in the presence of Lewis acid catalyst, Aluminum chloride (AlCl3).

The resulting product is then heated to obtain Toluene (Methylbenzene).

The chemical reaction for the conversion of Benzene to Toluene is given below:C6H6 + CH3Cl → C6H5CH3 + HCl

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