Quais são os três tipos de tecidos musculares? E)celulas,estriado esqueletico, estriado liso. B)esttiadi esqueletico, liso, estriado cardiaco c)estriado liso, estriado esqueletico, estriado cardíaco. D)liso, celulas, esteiado cardíaco. ESSA PERGUNTA E DE CIENCIAS MAS NAO TEM VIENCIAS ALI PRA ESCOLHER;-;.

Answer:

Valence electrons of selenium will be placed in s and p-orbitals.

Answer:

Explanation:

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

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

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 = 2.8 × 10²⁴ atoms of Cl2

So we have

\(n = \frac{2.8 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 4.65116279069...\)

We have the final answer as

Hope this helps you

Antibodies against nicotinic acetylcholine receptors (nAChR), present at neuromuscular junction (NMJ), can affect function of junction by interfering with normal signaling between nerve and muscle.

Antibodies against nicotinic acetylcholine receptors (nAChR), which are present at neuromuscular junction (NMJ), can affect the function of junction by interfering with normal signaling between nerve and muscle.

At NMJ, the nerve terminal releases acetylcholine (ACh), which binds to nAChR on muscle cell membrane, leading to depolarization of muscle cell and muscle contraction. If antibodies bind to nAChR, they can block or reduce the number of available receptors for ACh, leading to decrease or even complete loss of the normal muscle response to nerve stimulation.

This can result in muscle weakness, fatigue, and even paralysis, depending on the severity of antibody binding and amount of functional nAChR remaining at the NMJ.

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The mass of iron(III) chloride that contains 2.35×10²³ chloride ions can be calculated using the molar mass and stoichiometry of iron(III) chloride.

To calculate the mass of iron(III) chloride, we need to use the molar mass and stoichiometry. The molar mass of iron(III) chloride (FeCl₃) can be calculated by adding the atomic masses of iron (Fe) and three times the atomic mass of chlorine (Cl). The atomic mass of iron is 55.845 g/mol, and the atomic mass of chlorine is 35.453 g/mol.

Molar mass of FeCl₃ = 55.845 g/mol + 3 * 35.453 g/mol = 162.204 g/mol

From the balanced chemical equation of iron(III) chloride, we know that each formula unit of FeCl₃ contains three chloride ions (Cl⁻). Therefore, the ratio of chloride ions to iron(III) chloride is 3:1.

Given that there are 2.35×10²³ chloride ions, we can calculate the moles of iron(III) chloride using the mole ratio:

Moles of FeCl₃ = (2.35×10²³ chloride ions) / (3 chloride ions/1 FeCl₃)

            = (2.35×10²³) / 3 moles

Finally, we can calculate the mass of iron(III) chloride using the moles and molar mass:

Mass of FeCl₃ = Moles of FeCl₃ * Molar mass of FeCl₃

Substituting the values, we can find the mass of iron(III) chloride containing 2.35×10²³ chloride ions.

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When a sucrose, is added to a solvent, it affects the boiling point of the solvent. This phenomenon is known as boiling point elevation.

Given information,

Mass of water = 1 kg

Moles of sucrose = 2 mol

The boiling point elevation: ΔTb = Kb × m

Where:

ΔTb is the change in boiling point and Kb is the molal boiling point elevation constant, and m is the molality of the solute.

m = (number of moles of solute) / (mass of solvent in kg)

m = 2.0 mol / 1.0 kg = 2.0 mol/kg

The value of Kb for water is approximately 0.512 °C/m.

Now, (ΔTb):

ΔTb = Kb × m

ΔTb = 0.512 °C/m × 2.0 mol/kg

ΔTb = 1.024 °C

Therefore, when 2.0 mol of sucrose is added to 1.0 kg of water, the boiling point of the water will increase by approximately 1.024 °C.

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Answer:

water and a salt

Explanation:

1. LiCl (Lithium chloride) CsBr (Cesium bromide) NaCl (Sodium chloride).

3. Group 1 elements, also known as alkali metals, form 1+ ions because they have one valence electron in their outermost energy level.

4. The formula of the sulfide ion is S2-.

5. The ions in NaCl stay together due to electrostatic attraction between the oppositely charged ions.

6. The formula of potassium sulfide is K2S. In this compound, potassium (K+) forms a 1+ ion, and sulfide (S2-) forms a 2- ion.

1. The three ionic compounds from the given list are:

LiCl (Lithium chloride)

CsBr (Cesium bromide)

NaCl (Sodium chloride)

Dot-and-cross diagrams for the three ionic compounds:

2. LiCl:

Li (Lithium) has 1 valence electron while Cl (Chlorine) has 7 valence electrons. The electron from Li is transferred to Cl, resulting in the formation of Li+ and Cl- ions. The dot-and-cross diagram would show Li with no dots and Cl with 8 dots around it.

CsBr:

Cs (Cesium) has 1 valence electron while Br (Bromine) has 7 valence electrons. Similar to LiCl, the electron from Cs is transferred to Br, resulting in Cs+ and Br- ions. The dot-and-cross diagram would show Cs with no dots and Br with 8 dots around it.

3. NaCl:

Na (Sodium) has 1 valence electron while Cl (Chlorine) has 7 valence electrons. Again, the electron from Na is transferred to Cl, forming Na+ and Cl- ions. The dot-and-cross diagram would show Na with no dots and Cl with 8 dots around it.

4. Group 1 elements, also known as alkali metals, form 1+ ions because they have one valence electron in their outermost energy level. These elements have a strong tendency to lose this valence electron to achieve a stable electron configuration similar to the noble gas configuration.

The formula of the sulfide ion is S2-.

5. The ions in NaCl stay together due to electrostatic attraction between the oppositely charged ions. In NaCl, the sodium (Na+) ion has a positive charge, and the chlorine (Cl-) ion has a negative charge. These opposite charges attract each other, forming an ionic bond.

The strong electrostatic attraction between Na+ and Cl- keeps the ions together in a crystal lattice structure.

6. The formula of potassium sulfide is K2S. In this compound, potassium (K+) forms a 1+ ion, and sulfide (S2-) forms a 2- ion. To balance the charges, two potassium ions are required for every sulfide ion.

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Answer:

the answer is A(the ability of electrons to flow through out the metal)

Answer:

Home

Home

Slower

Explanation:

A liquid starts changing its phase to gas when the two pressures become the same i.e., vapor and atmospheric.

At a higher altitude the atmospheric pressure lowers so little amount of heat is required for the vapor pressure of water to equalize with the atmospheric pressure at a higher altitude.

The pressure at the Rosa's home will be higher and lower in the campsite.

The boiling point will be higher at her home.

As the boiling point is lower in the campsite the water used in cooking noodles will evaporate faster this may lead to the noodles being under cooked. The water may evaporate before the noodles have cooked. So, the noodles will cook at a slower rate at the campsite and faster in her home.

A. The atmospheric pressure at Rosa's home is higher than her campsite.

B. The boiling point of water at Rosa's home is higher.

C. The noodles will be cooked faster at Rosa's home compared to at the campsite

A. The pressure has been the force that has been exerted by the molecules against each other, The higher altitude has lesser air molecules, which resulted in the lower pressure.

Since the pressure at 33 feet has been higher as than the pressure at 11,000 feet altitude, the atmospheric pressure at Rosa's home is higher than her campsite.

B. The boiling point has been the temperature at which liquids have been converted to gases. With the decrease in atmospheric pressure, there has been a lowering in the boiling point as well.

The atmospheric pressure at Rosa's home is higher compared to her campsite. Thus, the boiling point of water at Rosa's home is higher.

C. The lower atmospheric pressure at the campsite has been responsible for the lower boiling point of the temperature, This implies that water has converted to steam at lower temperatures. The lower temperature of water requires more time for the noodles to be cooked.

Thus, the noodles will be cooked faster at Rosa's home compared to at the campsite.

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Answer:

See below:Explanation:

P1V1/T1  = P2V2/T2

P1V1/T1   *   T2 / P2   = V2

15.17 *641.68 / 243.41    *  561.06/70.3  = 319.17 Liters

The Celsius temperature on the beach is approximately 35.8 degrees Celsius.

The pressure-temperature relationship is governed by Charles' Law, which states that as long as pressure is constant, the volume of a gas will be directly proportional to its temperature.The equation used to determine the relationship between temperature and pressure is as follows: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature in Kelvin (K).Let's utilize the formula given above to find the temperature of the beach:P1V1/T1 = P2V2/T2We can substitute the values we've been provided to solve for T2 : When the can is at 16 degrees Celsius and 4.5 atm, the pressure is:P1 = 4.5 atmT1 = 16°C + 273 = 289 KV1 and V2, which are the same, can be omitted. P2 = 4.81 atm Substituting these values in the equation : P1V1/T1 = P2V2/T2V1 and V2 are equal and can be eliminated. We can also change the temperature to Kelvin, so:T2 = (P2 * T1 * V1) / (P1 * V2)T2 = (4.81 atm * 289 K) / 4.5 atmT2 = 308.8 KSubtract 273 to convert back to Celsius : T2 = 308.8 K - 273 K = 35.8 degrees Celsius.

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The graph shows that as mass increases, kinetic energy increases exponentially. This means that as the mass of an object increases, the kinetic energy increases by a larger and larger amount.

This can be seen by the upward sloping line on the graph. This can be seen in the graph by the steepness of the line, which shows that the increase in kinetic energy is growing faster and faster as the mass increases. Additionally, the graph shows that the rate of increase in kinetic energy is greater for lower masses than for higher masses, which indicates an exponential increase. This can be seen by the upward sloping line on the graph.

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Answer:

31. To write the balance oxidation half-reaction, we need to determine which element is undergoing oxidation (losing electrons). In this reaction, aluminum (Al) is being oxidized because its oxidation state changes from 0 to +3. The oxidation half-reaction is:

4 Al(s) → 4 Al³⁺(aq) + 12 e⁻

Note that we balance the number of electrons transferred by multiplying the half-reaction by 3.

32. In Al₂O3, aluminum has an oxidation state of +3. The total charge of the compound is 0. Therefore, the oxidation state of oxygen can be calculated as:

2(oxidation state of Al) + 3(oxidation state of O) = 0

2(+3) + 3(x) = 0

6 + 3x = 0

3x = -6

x = -2

the oxidation number of oxygen in Al₂O3 is: -2.

Answer:

Cornea >iris>lens >retina

Explanation:

Can't exactly figure out the answer but I think it should look like this

Answer: cornea → iris → lens → retina

Explanation: I have my ways ;>

Answer:

(Ar, Xe, Rn) is the answer

According to the electronic configuration groups three to twelve have elements with more than one positive oxidation state.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer: chain reaction there will be no carbon and animals who eat plants will die off

Explanation:

The number of moles of NH3 that can be produced is 19.3 moles.

From the balanced equation of the reaction, the mole ratio of H2 reacted and NH3 produced is 3:2.

This means that for every 1 mole of H2 that reacts, 2/3 mole of NH3 will be produced.

Now, we have 29.0 moles of H2 reacting. If 1 mole of H2 produces 2/3 moles NH3, then 29 moles of H2 will produce:

                       29 x 2/3 = 19.3333 moles of NH3

To three significant figures, 19.333 moles will be 19.3 moles.

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The method of choice to purify the crude caffeine is High-Performance Liquid Chromatography (HPLC).

Liquid is a software platform developed by Shopify which enables users to create e-commerce websites and online stores. It is an open-source programming language designed to enable users to build and customize their online store with the help of a template-based language. With Liquid, users can add various dynamic content such as product information, customer data, and more to the store. It also makes it easy to modify the look and feel of the store with custom style sheets and other options.

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Lakes dry up. Shortage of water. Decrease in humidity.

Answer:

Sound can move at approximately 0.21313 miles/second.

Explanation:

Answer:

The reactants are on the left of the arrow, the products are on the right.

Explanation:

Reactants are the substances that exist before the chemical reaction takes place. When writing a chemical reaction or equation, they are found on the left of the arrow. They react to form new substances, which are known as the products. The products are found to the right of the arrow in the reaction.

Answer:

count how many electrons it 'owns'

Answer: The mole ratio of Zn to ZnO is 3: 3.

Explanation:

According to law of conservation of mass, mass can be neither be created nor be destroyed. The mass on reactant side must be equal to the mass on product side. Thus the atoms of each element on both side of the reaction must be same.

The balanced chemical reaction is:

\(3Zn+2MoO_3\rightarrow Mo_2O_3+3ZnO\)

Here 3 moles of Zn combine with 2 moles of \(MoO_3\) to give 1 mole of \(Mo_2O_3\) and 3 moles of \(ZnO\). Thus the mole ratio of Zn to ZnO is 3: 3.

A precipitate is formed when : D) Two liquids react and a solid is formed.

A precipitate is formed when two liquids react and a solid is formed as product. This is a clear indication that chemical change has occurred as the reactants have undergone chemical reaction to form new substance that is different from original reactants.

In contrast, when solid dissolves in liquid, it forms homogeneous solution and no precipitate is formed. Similarly, when one liquid dissolves in another, it forms homogeneous mixture and no precipitate is formed.

If two liquids react and gas is produced, this may also indicate chemical change, but it would not necessarily result in the formation of precipitate.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: One clue of a chemicals change is the formation of a precipitate (new solid) A precipitate is formed when:

a) Two liquids react and gas is produced

b) Solid dissolves in a liquid

c) One liquid dissolves in another

d) Two liquids react and solid is formed

Scientific theories are always testable and a theory may be changed as a result of new observations.

A scientific theory can be described as a structured explanation to explain the facts of the natural world that commonly incorporates a hypothesis and laws.  Any scientific theory should be based on a rational and careful examination of the facts.

There is a distinction between facts observed and theories in the scientific method, which are interpretations of the data and facts or explanations of scientists.

If contradictions to the predictions of the theory are measured, scientists should evaluate whether the experimental design was fine and accurate the results by repeating the experiments.

Solutions can need some changes to the theory or none at all, and after successive corrections, theories will be improved and greater accuracy can be achieved.

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In the above intermediate chemical equation, oxygen will appear as follows: O₂(g) as a reactant (option B).

A chemical equation in chemistry is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

According to this question, an intermediate chemical equation is presented as follows:

As observed in the above chemical equation, oxygen will react in its gaseous form i.e. as a reactant.

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Answer:

commensalim, mutualism, parasitism

1. The balanced chemical equation shows that for every 2 molecules of octane burned, 16 molecules of carbon dioxide are produced. Therefore, the number of molecules of carbon dioxide represented by the equation is 16.

2. The balanced chemical equation shows that for every 2 molecules of octane burned, 25 molecules of oxygen are required. Therefore, the ratio of octane to oxygen is 2:25. From this, we can determine the number of moles of octane represented by the equation by dividing the given amount of oxygen by the ratio:

25 mol O2 × (2 mol C8H18 / 25 mol O2) = 2 mol C8H18

Therefore, the equation represents 2 moles of octane.

3. The simplified mole ratio of octane to carbon dioxide can be determined by dividing both sides of the equation by the coefficient of octane (2):

2C8H18(g) +25O2(g) → 16CO2(g) + 18H2O(l)

Dividing by 2, we get:

C8H18(g) + 12.5O2(g) → 8CO2(g) + 9H2O(l)

The simplified mole ratio of octane to carbon dioxide is therefore 1:8.

4. The simplified mole ratio of oxygen to octane can be determined in the same way, by dividing both sides of the equation by the coefficient of octane:

2C8H18(g) +25O2(g) → 16CO2(g) + 18H2O(l)

Dividing by 2, we get:

C8H18(g) + 12.5O2(g) → 8CO2(g) + 9H2O(l)

The simplified mole ratio of oxygen to octane is therefore 12.5:1.

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As a pollutant such as methylmercury works its way through the food chain, Biomagnification occurs, resulting in top-level food chain members ingesting even higher concentrations of the pollutant.

Biomagnification is the process by which pollutants such as methylmercury become increasingly concentrated as they move up the food chain. This occurs because organisms at lower levels of the food chain ingest small amounts of the pollutant, which then accumulates in their bodies. As larger organisms consume these smaller organisms, they take in a higher concentration of the pollutant. This process continues as the pollutant moves up the food chain, resulting in top-level predators ingesting even higher concentrations of the pollutant. Biomagnification can have serious consequences for the health of these top-level predators, as well as for human populations that consume them.

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Answer:

it's-B.....................