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In this activity, you’ll conduct research about the savanna biome, a type of grassland. Use credible websites to gather information on these points:

the location of the savanna on Earth
the conditions in the savanna (temperature, precipitation, etc.)
the living things that make up this ecosystem (Identify all forms: plants, prey animals, and predators, for example.)
the nonliving components that make up the environment
After you’ve completed your research, answer the following questions.

Part A
Summarize your research, and describe the attributes of the savanna.

Answer:  Tt will take approximately 4.49 x 10^(-10) seconds for the centrifuge until a 3 cm displacement of the boundary layer occurs relative to the initial 4 cm location of the boundary layer.

Explanation:

To determine the time it will take for the centrifuge until a 3 cm displacement of the boundary layer occurs relative to the initial 4 cm location of the boundary layer, we can use the sedimentation coefficient (S) and the angular velocity of the centrifuge.The formula for calculating the displacement (Δr) of the boundary layer in a centrifuge is:

Δr = S * ω * tWhere:

Δr is the displacement of the boundary layer (in cm),

S is the sedimentation coefficient (in s),

ω is the angular velocity of the centrifuge (in rad/s), and

t is the time (in seconds).

Here, the initial displacement of the boundary layer is 4 cm and we want to achieve a displacement of 3 cm, the change in displacement (Δr) is 3 cm - (-4 cm) = 7 cm.We need to convert the angular velocity from rpm to rad/s. Since 1 rpm = (2π/60) rad/s, the maximum angular velocity of 35,000 rpm is equal to (35,000 * 2π/60) rad/s ≈ 3665.19 rad/s.

Let's calculate the time (t):

t = Δr / (S * ω)For alcohol dehydrogenase:

S = 4.88 x 10^(-13) s

ω = 3665.19 rad/st = 7 cm / (4.88 x 10^(-13) s * 3665.19 rad/s)

t ≈ 4.49 x 10^(-10) s

Therefore, it will take approximately 4.49 x 10^(-10) seconds for the centrifuge until a 3 cm displacement of the boundary layer occurs relative to the initial 4 cm location of the boundary layer.

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Answer:

C2H4

Explanation:

cause the compound of ethylene is C2H4

Ethylene is a hydrocarbon gas with the chemical formula C₂H₄. It is a simple molecule that consists of two carbon atoms and four hydrogen atoms and is also known as ethene. The skeletal structure is CH₂=CH₂.

Ethylene is a colorless and odorless gas that is the simplest member of the olefin class of hydrocarbons, with the chemical formula C₂H₄. It is an important organic compound and is widely used in industry.

Ethylene is primarily used to produce polyethylene, which is one of the most common plastic materials in the world. It is also used as a fuel in some industrial processes, as a refrigerant, and as a precursor to other chemicals.

It is an important plant hormone and is involved in various physiological processes such as fruit ripening, senescence, and abscission. Ethylene is naturally produced by plants, but it can also be produced artificially and is commonly used in agriculture to ripen fruits and vegetables.

Thus, the ethylene compound is CH₂=CH₂.

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The molarity of a solution indicates the concentration in moles of a substance in the solution (Option D)

Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

For example: What is the molarity of a solution containing 75 g of KNO₃ in 0.35 L of solution.

Mole = mass / molar mass

Mole of KNO₃ = 75 / 101

Mole of KNO₃ = 0.743 mole

Molarity = mole / Volume

Molarity = 0.743 / 0.35

Molarity = 2.12 mol/L

From the above, we can see that the molarity indicates the concentration in mole of the substance in the solution.

Thus, the correct answer to the question is:

The concentration in moles of a substance in the solution (Option D)

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After the rodent was stung, net potassium efflux is increased in a resting neuron relative to the time period prior to the sting.

Here, correct answer will be

This is due to the release of neurotransmitters, such as glutamate, which causes an influx of sodium ions into the neuron and an efflux of potassium ions out of the neuron.

This change in ion concentration causes the neuron to become depolarized and increases the likelihood of an action potential. As a result, the neuron is more likely to fire action potentials, thus increasing the net potassium efflux.

This increase in activity is a mechanism of pain signaling and serves to alert an animal of potential danger. In addition, the release of neurotransmitters can lead to the release of other substances, such as hormones, which can cause further changes in the body.

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decay rate of approximately 1.69x10^17 Bq (becquerels),

The decay rate of a radioactive sample is determined by the number  of radioactive atoms present and the decay constant, which represents the probability of decay per unit of time.

To calculate the decay rate, we multiply the number of atoms in the sample by the decay constant. In this case, the sample has 8.31x10^17 atoms and a decay constant of 0.203/s. Multiplying these values gives a decay rate of approximately 1.69x10^17 Bq (becquerels), which represents the number of decays per second in the sample.

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A nucleus of uranium 238 decays by alpha emission to form a daughter nucleus, thorium 234.

Isotopes are atoms with the same number of protons but differ in numbers of neutrons.

Uranium-238 produces thorium-234 by alpha decay.

An α-particle is a helium nucleus. It contains 2 protons and 2 neutrons, for a mass number of 4.

During α-decay, an atomic nucleus emits an alpha particle. It transforms (or decays) into an atom with an atomic number 2 less and a mass number 4 less.

Thus, uranium-238 decays through α-particle emission to form thorium-234 according to the equation:

\(^{238}_{92}U\;\rightarrow\;^{234}_{90}Th\;+\;^4_2He\)

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Answer:

b

Explanation:

glucose

During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose. Much more ATP, however, is produced later in a process called oxidative phosphorylation. Oxidative phosphorylation is powered by the movement of electrons through the electron transport chain, a series of proteins embedded in the inner membrane of the mitochondrion.

Answer:

During cellular respiration, your cells release energy in the form of ATP (adenosine triphosphate), which is used as an energy source by the body. The energy released during cellular respiration comes from the breakdown of glucose, which is a type of sugar that is used by the body as a source of fuel. In addition to ATP, some heat is also released during cellular respiration, but this is not the primary product of the process. So the correct answer is a. Energy.

This chemical is known as lead (II) nitrate. It is an ionic assembly (salt compound) comprised of lead cations in the +2 oxidation state. With regard to the naming convention, each lead (II) cation is paired with two nitrate anions, each having a charge of -1.

Chemical nomenclature is a set of principles for naming chemical substances in a systematic manner. The International Union of Pure and Applied Chemistry designed and developed the most widely used nomenclature in the world (IUPAC).

The basic goal of chemical nomenclature is to guarantee that no ambiguity exists between a spoken or written chemical name and the chemical compound to which the name refers. Each chemical name should only relate to one substance.

It is required to indicate the charge of these cations or compounds containing these cations when identifying them. Ionic compounds are formed when cations and anions interact. The cation of an ionic compound is named first, followed by the anion. When writing their chemical formulae, they use the same format.

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The correct answer to this question is B) The vibration energy increases.

When a molecule absorbs a photon of infrared light, it gains energy that is transferred to its atoms. This energy is then used to increase the amplitude of the molecule's vibrational motion. Infrared radiation is absorbed by molecules that possess a dipole moment, which means that there is a separation of charge within the molecule. As the molecule vibrates, the distance between the atoms changes, causing the dipole moment to oscillate. The frequency of this oscillation corresponds to the energy of the absorbed photon. Thus, infrared spectroscopy can be used to identify the types of bonds present in a molecule based on the frequency of the absorbed radiation. The other options listed in the question are not relevant to the absorption of infrared light by a molecule.

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444.44 mL of the Fe(ClO4)2 solution is needed.

To answer this question, you will need to use the following equation:

M1V1 = M2V2

where M1 is the initial molarity (in this case, 4.00 m of Fe(ClO4)2), V1 is the volume of the initial solution (in mL), M2 is the desired molarity (in this case, 0.178 m of perchlorate ions), and V2 is the volume of the desired solution (in this case, 2.50 L or 2500 mL).

By rearranging the equation, you can calculate the volume of the Fe(ClO4)2 solution needed (V1):

V1 = (M2 x V2) / M1

Substituting in the given values, we get:

V1 = (0.178 x 2500) / 4.00

V1 = 444.44 mL

Therefore, 444.44 mL of the Fe(ClO4)2 solution is needed to make the 2.50 L solution with a molarity of 0.178 m perchlorate ions.

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Answer:

1/375

Explanation:

Primero se debe calcular el factor de dilución para cada dilución seriada. Para ello, se divide el volumen de muestra entre el volumen final de la solución diluida.

1) 1 mL  en 1 mL + 4 mL = 5 mL

D1 = 1 mL/5 mL = 1/5

2) 0,5 mL en 5 mL

D2 = 0,5 mL/5 mL = 1/10

3) 0,2 mL en 0,2 mL + 1,3 mL = 1,5 mL

D3 = 0,2 mL/1,5 mL = 2/15

La dilución total se calcula como el producto de las diluciones seriadas realizadas:

DT = D1 x D2 x D3 = 1/5 x 1/10 x 2/15 = 1/375

False

complete combustion produces carbon dioxide + water

Carbon = C

Oxygen = O

CO2 = Carbondioxide

Balanced equation :

C + O2 = CO2

Answer:

co2

Explanation:

c+o2-------------> co2

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

From the question

N = 4.36 × 10^25 molecules

We have

\(n = \frac{4.36 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 72.425249...\)

We have the final answer as

Hope this helps you

When gaseous carbon monoxide reacts with hydrogen gas to form gaseous Methane and liquid water we call it a displacement reaction.

The chemical equation that will take place on the combination of carbon monoxide and hydrogen gas is given as,

CO+H₂ → CH₄ + O₂

The reason why calling this reaction as a displacement reaction is because the oxygen from the carbon monoxide is being replaced by the hydrogen gas and the formation of Methane is taking place separated from the carbon monoxide molecule is left out to remain in the form of liquid water.

This reaction can also be stated as a redox reaction because the oxidation of the hydrogen molecule and the reduction of the carbon monoxide molecule is taking place in this reaction simultaneously.

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Hydrochloric acid or Hcl

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

90

Explanation:

gshhhshussussussjsuushhshjssuss

When sodium (Na) is mixed with water, it undergoes a similar reaction to lithium (Li) and potassium (K) with water. Therefore, the gas we would expect sodium to generate when it reacts with water is hydrogen gas (H₂).

The reaction of sodium with water is highly exothermic and vigorous. It can be represented by the following equation:

2Na + 2H₂O → 2NaOH + H₂

In this reaction, two sodium atoms (2Na) react with two water molecules (2H₂O), resulting in the formation of two molecules of sodium hydroxide (2NaOH) and one molecule of hydrogen gas (H₂).

The reaction occurs because sodium is a highly reactive metal, belonging to Group 1 (alkali metals) of the periodic table. Like lithium and potassium, sodium has a single valence electron, which it readily donates in chemical reactions.

In the presence of water, sodium atoms lose an electron, becoming positively charged sodium ions (Na⁺). These sodium ions then react with water molecules. Water molecules, in turn, are oxidized, resulting in the production of hydroxide ions (OH⁻) and hydrogen gas (H₂).

The generated hydrogen gas is released as bubbles and can be observed as effervescence during the reaction between sodium and water.

It is important to note that the reaction between sodium and water is highly exothermic, producing a substantial amount of heat. Due to its vigorous nature, the reaction should be performed with caution and appropriate safety measures.

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Answer:

sp3

Explanation:

4 bonds to central atom with no lone pair

The mass of magnesium that would produce the maximum amount of heat is 0.547 grams.

The chemical reaction between magnesium and HCl is

Mg + 2 HCl → MgCl₂ + H₂

In stoichiometry, the Avogadro's law said that the coefficient for every subtances in the reaction is the ratio for the number of moles for every subtances.

For HCl

For Mg

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(a)The pH of the fruit juice solution is approximately 3.5. (b) The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(b)The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(a). The hydrogen ion concentration of the fruit juice is 0.0003 mol/L. We can determine the pH of the solution using the formula pH = -log[H⁺].

pH = -log(0.0003)

pH ≈ -log(3 × 10⁻⁴)

Using a calculator, we can calculate the logarithm:

pH ≈ -(-3.5229) (rounded to the nearest tenth)

pH ≈ 3.5

Therefore, the pH of the fruit juice solution is approximately 3.5.

(b). A tomato has a pH of 3.0. We can determine the hydrogen ion concentration of this solution by rearranging the formula pH = -log[H⁺] to solve for [H⁺].

[H⁺] = 10(-pH)

[H⁺] = 10⁻³

[H⁺] = 0.001 mol/L

Therefore, the hydrogen ion concentration of the tomato solution is 0.001 mol/L.

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Answer:

i have no idea. let's say location because it has to be somewhere.

Explanation:

I

The correct category for each agent is as follows:

Erosion is the result of having been worn away or eroded, as by a glacier on rock or the sea on a cliff face.

Weathering, on the other hand, is the mechanical or chemical breaking down of rocks in situ by weather or other causes.

Most erosion is performed by liquid water, wind, or ice (usually in the form of a glacier).

Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.

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Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. Ions are usually bigger than the atoms from which they are formed.

When an atom receives or loses electrons, the atom's electron configuration changes, resulting in a net positive or negative charge.

This net charge expands the electron cloud surrounding the nucleus, making the ion bigger in size than the neutral atoms from which it arose. When a metal atom loses one or more electrons to create a cation, it shrinks in size because the positive charge of the nucleus pulls the remaining electrons more strongly.

When a nonmetal atom obtains one or more electrons to create an anion, it normally expands in size.Because of the increasing amount of electrons, the electron cloud surrounding the nucleus grows. It should be noted that this comparison is not absolute and is dependent on the individual factors involved. Some ions are smaller than their neutral atom counterparts, while others are similar in size.

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The complete question is:

Compare the size of ions to the size of atoms from which they form.

A. a higher boiling point and a lower freezing point

Explanation:

hope this helps :)

Hi! Solubility of materials in water depends on several factors, including polarity, intermolecular forces, and lattice energy. Here's an explanation with the terms you've requested:

1. Polarity: Water is a polar molecule, meaning it has a positive and negative end due to uneven distribution of electrons. Polar substances dissolve well in water (like dissolves like). Molecular solids with polar molecules will generally be soluble in water.

2. Intermolecular forces: There are various intermolecular forces, such as hydrogen bonding, dipole-dipole interactions, and London dispersion forces. Solids with intermolecular forces that are compatible with water's polarity will dissolve more readily.

3. Lattice energy: Molecular solids have a lattice structure, and the energy required to break this lattice determines their solubility. If the energy gained from solvation (interaction with water molecules) is greater than the lattice energy, the solid will dissolve.

Petroleum is insoluble in water because it is nonpolar and mostly consists of hydrocarbon molecules. These molecules have weak London dispersion forces and are not attracted to water's polar nature. Consequently, petroleum doesn't dissolve in water.

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To draw a Lewis structure for an atom, one must know number of valence electrons. A Lewis structure is indeed a diagram that depicts a molecule's covalent bonds as well as lone electron pairs.

Lewis electron dot structures, Lewis structure diagrams, as well as electron dot structures are all names for Lewis structures. All of these terms relate to the same type of diagram, that is used to represent the position of bonds including electron pairs.

A Lewis structure is indeed a diagram that depicts a molecule's covalent bonds as well as lone electron pairs. The octet rule underpins Lewis structures. While Lewis structures were valuable for illustrating chemical bonding, they lack aromaticity and do not adequately depict magnetic behavior. To draw a Lewis structure for an atom, one must know number of valence electrons.

Therefore, to draw a Lewis structure for an atom, one must know number of valence electrons.

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