the atoms in the same period on the periodic table all have what ?
A - The same abbreviation
B - The same number of electron shells
C - the same number of electrons
D - the same number of electrons on the outer energy level

Answer:

A. They both provide protection.

Explanation:

Like the bark of a tree the cell wall provides protection.

The similarity that she noticed between a plant cell wall and the bark of a tree is that they both provide protection.

A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism.

Cell walls are absent in many eukaryotes, including animals, but are present in some other ones like fungi, algae and plants, and in most prokaryotes (except mollicute bacteria). A major function is to act as pressure vessels, preventing over-expansion of the cell when water enters.

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Answer:

La respuesta está en la explicación

Explanation:

Los átomos que no poseen ___CARGA____ son conocidos como ____ÁTOMOS____ ____NEUTROS_____. Los átomos que poseen carga se denominan ___IONES____, aquellos con carga positiva de llaman ____PROTONES____ y son aquellos que __PIERDEN__ electrones. Los ______ANIONES____ son aquellos con carga negativa y son los que _____GANAN___ electrones. Para todos los casos el valor de _MASA__ y _NÚMERO ATÓMICO_ permanecen iguales y son los que sacamos de la tabla periódica.

Answer:

oceanic ridge

The youngest rocks on the ocean floor are located at the oceanic ridge, an underwater mountain range formed from the spreading of tectonic plates in.

Explanation:

1234567891011121314151617181920

Answer:

potassium and sodium

Explanation:

when they react with cold water they produce a metal hydroxide and hydrogen gas

Answer:

              0.50 g/mL

Explanation:

Formula of Density,

                          D = mass / volume

Mass = 12.2 g

Volume = 54.4 mL - 30.0 mL = 24.4 mL

Putting values,

                          D = 12.2 g / 24.4 mL

                          D = 0.50 g/mL

The average linear acceleration of an air changes with increase, which in turn causes the rms velocity (and average speed) of gas molecules to increase. As a result, the molecules hit their enclosures' walls .

Two items collide when they briefly come into contact with one another. To put it another way, a collision is a brief reciprocal encounter between two masses in which the velocity and energy of the masses change.

According to the collision theory, for a physical reaction to take place, the interacting particles must come into contact with one another. The interaction forces affects the reaction's rate. Additionally, according to the hypothesis, reacting particles frequently collide without responding.

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The three technologies used to convert biomass energy into heat and electricity are Combustion, Gasification, Anaerobic Digestion.These technologies enable the efficient utilization of biomass resources, reducing reliance on fossil fuels and contributing to renewable energy generation.

Combustion: Biomass combustion is a widely used technology that involves burning biomass materials, such as wood, agricultural residues, or dedicated energy crops, to produce heat and electricity. In this process, biomass is burned in a controlled manner, and the heat generated is used to produce steam, which drives a turbine connected to a generator. The combustion process releases carbon dioxide (CO2), but since biomass is considered a renewable energy source, the CO2 emitted is part of the natural carbon cycle and does not contribute to net greenhouse gas emissions.

Gasification: Biomass gasification is a thermochemical process that converts biomass into a combustible gas known as syngas. The biomass is subjected to high temperatures in a low-oxygen environment, resulting in the production of syngas, which mainly consists of carbon monoxide (CO), hydrogen (H2), and traces of other gases. The syngas can be used directly for heating purposes or for the production of electricity through internal combustion engines, gas turbines, or fuel cells.

Anaerobic Digestion: Anaerobic digestion is a biological process that breaks down biomass, such as animal manure, crop residues, or organic waste, in the absence of oxygen. During the anaerobic digestion process, microorganisms break down the biomass, producing biogas, which is primarily composed of methane (CH4) and carbon dioxide (CO2). The biogas can be combusted to produce heat and electricity, or it can be upgraded to biomethane and injected into the natural gas grid or used as a transportation fuel.

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As there is no mention of any conditions or contingencies that would allow McTiernan to back out of the sale, it can be argued that McTiernan is legally obligated to complete the sale and hand over the taxi permit to Dixon, as per their agreement.

Based on the provided facts and the applicable law, a court would likely decide in favor of Dixon. McTiernan had initially agreed to sell the taxi permit to Dixon for a specific price, and Dixon had already paid a deposit towards the purchase.

Issue:
The issue in this case is whether McTiernan is obligated to complete the sale of the taxi permit to Dixon, despite his decision to continue driving his taxi due to a decline in his retirement assets.

Law:
According to the given facts, the city has a set of by-laws that control the availability and operation of taxi cabs. To be a taxi driver, a person must hold both a special driver's license and a taxi permit. The taxi permit is difficult to obtain and is limited in number, resulting in a huge waiting list. The by-laws also permit the private sale of taxi permits.

Application:
In this case, McTiernan agreed to sell his taxi permit to Dixon for $50,000. Dixon paid a deposit of $5,000, and the parties agreed that the sale would be completed at the end of the year. However, McTiernan's decision to continue driving his taxi due to a decline in his retirement assets prompted him to call off the sale and attempt to return Dixon's deposit. Dixon refuses to accept the deposit back and insists that McTiernan must complete the sale by handing over the taxi permit in exchange for the agreed price.

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The answer cannot be provided without the specific values of the initial and final readings of the burets.

To determine the total volume of liquid delivered in milliliters (ml), you need to subtract the initial reading from the final reading of the burets. The difference between these two readings represents the volume of liquid dispensed.

To calculate the total volume, follow these steps:

1. Determine the initial reading of the burets in ml.

2. Determine the final reading of the burets in ml.

3. Subtract the initial reading from the final reading.

The resulting value will give you the total volume of liquid delivered in ml.

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Answer:

I believe is the npp i kinda forgot how to do these lol

Diagram with npp type shows an atom that is not a form of hydrogen.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state. ...  

Explanation:

Therefore, spectroscopy can be used to identify elements in matter of unknown composition.

Answer:

When you are exercising, your muscles need extra oxygen—some three times as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing.

Explanation:

Answer:

Oxidation occurs when a reactant loses electrons during the reaction. Reduction occurs when a reactant gains electrons during the reaction.

The force applied to the 10 kg computer was 50 Newtons.

An electrical device with the capability to accept, store, process, and output data is known as a computer.

The following formula can be used to determine the force exerted on a 10 kilogram computer that is accelerating at a rate of 5 m/s2:

Force = mass x acceleration

Where

Plugging in these values, we get:

Force = 10 kg x 5 m/s²

Force = 50 N

Therefore, the force applied to the 10 kg computer was 50 Newtons.

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Answer:

The volume of the base is 0.05819·x L, where x is the number of moles of base that combines with one mole of sulfuric acid

Explanation:

The volume of the sulfuric acid, V = 25.3 mL = 25.3 × 10⁻³ L

The concentration of the sulfuric acid, c = 2.30 M

The concentration of the base, \(c_{base}\) = 1.00 M

Let the mole ratio of the acid to base be 1 : x

The number of moles of sulfuric acid present, n = c × V

∴ n = 2.30 M/L × 25.3 × 10⁻³ L = 0.05819 moles

The number of moles of sulfuric acid present, n = 0.05819 moles

1 mole of sulfuric acid combines with x moles of base

Therefore, 0.05819 moles of sulfuric acid will combine with 0.05819·x moles of base

The number of moles of base, \(n_{base}\) = 0.05819·x moles

Therefore, the volume of base, \(V_{base}\) = \(n_{base}\)/\(c_{base}\)

∴  \(V_{base}\) = 0.05819·x/1 ≈ 0.05819·x L

The volume of base,  \(V_{base}\) ≈ 0.05819·x L.

When an electronic transition occurs in ethylene, it refers to the promotion of an electron from a bonding molecular orbital to an antibonding molecular orbital, resulting in the excitation of the molecule to a higher energy level. This transition leads to the weakening of the carbon-carbon bond in ethylene due to a decrease in the bond order.

Bond order refers to the number of chemical bonds between two atoms and is directly proportional to the bond strength. The higher the bond order, the stronger the bond between the two atoms. Therefore, an electronic transition that weakens the bond order in ethylene would lead to a decrease in the bond strength between the two carbon atoms.

Overall, the electronic transition in ethylene would lead to a weakening of the carbon-carbon bond order, making the molecule more reactive and susceptible to chemical reactions. This can have significant implications in various chemical and biological processes where ethylene is involved as a reactant or a product.

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NO2(OH) dissolved in water is an example of an acidic salt.

Acidic salts are formed when a strong acid and a weak base react together. They are acidic in solution because they dissociate to form H+ ions and an anion. In this case, the acidic salt is NO2(OH), which when dissolved in water, dissociates to form H+ ions and OH- ions, resulting in an acidic solution.

Ni(OH)2 dissolved only in an acidic solution is an example of a basic salt.

Basic salts are formed when a strong base and a weak acid react together. They are basic in solution because they dissociate to form hydroxide ions (OH-). In this case, the basic salt is Ni(OH)2, which when dissolved only in an acidic solution will dissociate to form Ni2+ ions and OH- ions resulting in a basic solution.

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Answer:

c. 640.51

Explanation:

Given: 2.54 cm = 1 inch weighed 3.88 ounces

1 g = 0.035273 ounces

?   = 3.88 ounces

? = (3.88 x 1) / 0.035273

? = 109.999 = 110 g

110 g = 3.88 ounces

2.54 cm = 110 g

14.79 cm = ?

? = (14.79 x 110) / 2.54

? = 640.51 g

According to unit conversion, there are 640.51 g would a 14.79 cm length of same iron rod weigh.

Unit conversion is defined as a multi-step process which involves multiplication or a division operation by a numerical factor.The process of unit conversion requires selection of appropriate number of significant figures and the rounding off procedure.

It involves a conversion factor which is an expression for expressing the relationship between the two units.A conversion ratio always has value which equals to one which indicates that numerator and denominator have values which are expressed in different units.

Given: 2.54 cm = 1 inch weighed 3.88 ounces,1 g = 0.035273 ounces

x  = 3.88 ounces

x= (3.88 x 1) / 0.035273

x = 109.999 = 110 g

110 g = 3.88 ounces

Thus,2.54 cm = 110 g

14.79 cm = x

x= (14.79 x 110) / 2.54

x = 640.51 g

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Answer:

20L

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 10L

Initial Temperature (T1) = stp = 273K

Final temperature (T2) = 546K

Final volume (V2) =..?

The new volume of the gas can be obtained by using the Charles' law equation as shown below:

V1/T1 = V2/T2

10/273 = V2/546

Cross multiply to express in linear form

273 x V2 = 10 x 546

Divide both side by 273

V2 = (10 x 546) / 273

V2 = 20L

Therefore, the new volume of the gas is 20L.

Answer:

168.75 ml

Explanation:

M1V1=M2V2

375ml*.45M=1M*V2

Answer:

Air Temp 77F Dew-point 19F

Explanation:

Quiz

The dew point can be described as the temperature required by the air to be cooled. The driest air will have a higher dew point, therefore, at an air temperature of 66°F and a dew point of 60°F. Therefore, option (C) is correct.

The dew point can be defined as the temperature at which air should be cooled to become saturated with water vapor assuming constant air pressure and water content.

Moisture capacity will decrease below the dew point. Airborne water vapor will condense to form liquid water or dew. Dew develops on the surface and occurs through contact with a cooler surface.

The dew point is called the frost point when the temperature is below the freezing point because frost is produced by deposition rather than a condensation of water.

The humidity also impacts the dew point. The dew point increases when there is higher moisture in the atmosphere.  Therefore, the higher dew point refers to less humid air or drier.

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The statement "a glycosidic bond is a bond between the anomeric carbon of a carbohydrate and any other biological molecule" is true.A glycosidic bond is a type of covalent bond that forms between the anomeric carbon of a carbohydrate molecule and another molecule, such as another carbohydrate, a protein, or a lipid.

The anomeric carbon is the carbon atom in a carbohydrate molecule that was involved in the formation of the carbonyl group (C=O) during the cyclization of the sugar. The anomeric carbon can exist in two different configurations, alpha or beta, depending on the orientation of the hydroxyl group (-OH) attached to it. When the anomeric carbon reacts with another molecule, such as an alcohol or amine group of another carbohydrate, a glycosidic bond is formed.

Glycosidic bonds are important in the formation of complex carbohydrates, such as starch, glycogen, and cellulose, as well as in the synthesis of glycoproteins and glycolipids. The type of glycosidic bond formed between two carbohydrates can have significant implications for their biological function and the properties of the resulting molecule.

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If a radioactive isotope has a half-life of 400 million years, it will take 400 million years for 50% of the material to change to the daughter product.

How long it takes for half of the radioactive atoms to decay is known as the half-life of the isotope. A radioactive isotope's half-life is the amount of time it takes for half of the parent material to decay to the daughter product. It's worth noting that a half-life isn't a fixed amount of time for each radioactive isotope.

The following formula can be used to calculate the amount of radioactive isotope remaining after a given period of time:

t=ln(N₀/N) / λ

Where:

For this problem, we need to solve for the time (t) at which 50% of the radioactive isotope has decayed:

0.5N₀ = N₀ e^(-λt)

0.5 = e^(-λt)

t = ln(0.5) / (-λ)

We know that the half-life of this isotope is 400 million years, which means that λ is equal to:

ln(2) / (400,000,000 years)

λ = 0.00000000017 / year

Substituting that value into the formula:

t = ln(0.5) / (-0.00000000017 / year)

t ≈ 400,000,000 years

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It would be positive sign of the entropy change for the system.

What is entropy?

Entropy is only a measurement of how much energy from atoms and molecules spreads out during a process. It can be defined in terms of the statistical probability of a system or in terms of the other thermodynamic quantities.

According to the given question:

Consideration of the entropy change of the universe and the second law of thermodynamics. If both the entropy change of the system and the entropy change of the environment are positive, the entropy change of the universe will be positive, so the reaction will always be spontaneous under the given conditions.

The entropy change for each reaction is calculated using the standard entropy, usually at room temperature.

So if the change in cosmic entropy is positive, the reaction is spontaneous.

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If the nitrogen dioxide gas has a pressure of 4.5 atm and contains 0.86 moles at 27.0 degrees  then the volume of the volume of the gas is 20.41 liters

We can use the ideal gas law equation, PV = nRT, to calculate the volume of the nitrogen dioxide gas. Given:

Pressure (P) = 4.5 atm

Number of moles (n) = 0.860 moles

Temperature (T) = 27.0 degrees Celsius = 27.0 + 273.15 = 300.15 Kelvin

R is the ideal gas constant. Plugging in the values into the equation, we have:

V = (nRT) / P

V = (0.860 moles * 0.0821 L·atm/(mol·K) * 300.15 K) / 4.5 atm

V = 20.41 liters

Therefore, the volume of the nitrogen dioxide gas is 20.41 liters.

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Answer:

8.3 g of NaCl

Explanation:

Edge 2022

Answer:

8.3 g NaCl

Explanation:

Its right just type it in

Explanation:

used as rust remover or paint remover

C, O, and F have less exothermic electron affinity than Si, S, and Cl respectively is due to their atomic structure and the stability of their outermost electron shells.

Carbon (C), Oxygen (O), and Fluorine (F) are all located in the second period of the periodic table, which means they have two electron shells. Silicon (Si), Sulfur (S), and Chlorine (Cl) are all located in the third period, which means they have three electron shells. The electron affinity of an atom is the amount of energy released when an electron is added to a neutral atom to form a negative ion. Atoms with a higher electron affinity release more energy when an electron is added, making the process more exothermic.

In the case of C, O, and F, their outermost electron shells are already relatively stable with 4, 6, and 7 electrons respectively. Adding an additional electron would disrupt this stability and require more energy. In contrast, Si, S, and Cl have a less stable outermost electron shell with only 4, 6, and 7 electrons respectively in their third shell. Adding an additional electron to these atoms would increase their stability and release more energy, resulting in a more exothermic electron affinity. Therefore, C, O, and F have less exothermic electron affinity than Si, S, and Cl respectively due to the stability of their outermost electron shells.

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