How many electrons does chlorine need to gain in order to be like Argon ?


- 2 electrons

- 3 electrons

- 1 electron

Active transport requires energy to transport the molecules across the cell membrane. Thus, Option A is correct.

Active transport is the transport of molecules from a lower concentration to a higher concentration across the cell (plasma) membrane. As this process is against the concentration gradient, it requires cellular energy to transport the molecules or ions. Active transport involves Primary active transport and secondary active transport.

Passive transport involves the movement of molecules from a higher to lower concentration gradient and thus does not require energy and is slower than active transport.

Therefore, only active transport requires energy for the transportation of molecules across the cell membrane.

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Answer:

Explanation

Answer:

I guess

Wave speed= Frequency x Wavelength

-> Wavelength= Wave speed divide Frequency

-> 50m/s divide 100Hz= 0.5m

I hope it help! :)

Answer:

djffffffffffffffffffffffffffffffffffffffffffffffffffffffffffgk

Explanation:

jdrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

The molecular shape of each of the molecule is given below.

A. Tetrahedral

B. Bent shape

C. Pyramidal

D. Trigonal planar

E. Linear

F. Linear

A molecule is described as a group of two or more atoms held together by attractive forces known as chemical bonds.

Theories of molecular shape helps us to determine the molecular shapes of each element shown.

The theory used to determine the molecular shape of the molecules is called the Valence Shell Electron Pair Repulsion Theory or VSEPR Theory.

One way to explain the shape of a molecule is called the Valence Shell Electron Pair Repulsion Theory or VSEPR Theory. We think of the valence electrons as occupying orbitals which are similar in shape to party balloons.

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The force by which an object is attracted towards the earth is called the gravitational force. Pushing an object by exerting a force opposite to it is normal force. The force generated by rubbing two objects against each other and resisting motion is friction force and the pulling force from opposites sides is called tension.

Force is an external agent acting on a body to change it from the state of motion or rest. There are various kinds of force such as frictional force, magnetic force, gravitational force etc.

Gravitational force is the force by  which the an object attracts other objects into its center of mass. Earth is attracting all bodies into its surface by gravitational force.

Pushing an object by exerting a force opposite to it is normal force. The force generated by rubbing two objects against each other and resisting motion is friction force and the pulling force from opposites sides is called tension.

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Answer:

A campfire is a perfect example of the different kinds of heat transfer. If you boil water in a kettle, the heat is transferred through convection from the fire to the pot.

Explanation:

Answer:

1.5055×10²⁴

Explanation:

................................

Answer:

The particles gain more kinetic energy and they move around faster

Answer:

The balanced chemical equation will be "\(NO_{2}+O\rightarrow NO+O_{2}\)".

Explanation:

The given equation is:

\(2NO_{2}\rightarrow 2NO+O_{2}\)

Step 1:

\(2NO_{2}\rightarrow NO+O\)...(equation 1)

Step 2:

\(NO_{2}+O\rightarrow NO+O_{2}\)...(equation 2)

On adding "equation 1" and "equation 2", we get

⇒  \(NO_{2}+NO_{2}+O\rightarrow NO+O+NO+O_{2}\)

⇒  \(2NO_{2}\rightarrow 2NO+O_{2}\)

The second step:

⇒  \(NO_{2}+O\rightarrow NO+O_{2}\)

Answer:

Preventing erosion – Land Reclamation

Protecting nesting areas – Protecting Biodiversity

Preventing littering – Land Reclamation

Preventing habitat disruption – Protecting Biodiversity

Protecting native species – Protecting Biodiversity

Preventing contamination of soil – Land Reclamation

Explanation:

I really hope I'm right! I tried my hardest, please give me brainliest :)

have a good day!

To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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The ionization of the following acids can be represented as:

Tetraoxosulphate (VI) Acid (\(H_{2}SO_{4}\)) ionizes as H+ and SO4^2- ions.

Trioxonitrate (V) Acid (\(HNO_{3}\)) ionizes as H+ and \(NO_{3-}\) ions.

Ethanoic Acid (\(CH_{3}COOH\)) ionizes as H+ and \(CH_{3}COO^{-}\) ions.

Tetraoxosulphate (VI) Acid, also known as sulfuric acid (\(H_{2}SO_{4}\)), ionizes as follows:

\(H_{2}SO_{4}\) → \(H+\) + \(SO_{4}^{2-}\)

In this reaction, sulfuric acid donates two hydrogen ions (H+) to the solution, forming sulfate ions (\(SO_{4}^{2-}\)).

Trioxonitrate (V) Acid, commonly known as nitric acid (\(HNO_{3}\)), ionizes as follows:

\(HNO_{3}\) → \(H+_{}\) + \(NO_{3-}\)

Nitric acid dissociates to release one hydrogen ion (\(H+\)) and a nitrate ion  (\(NO_{3-}\)).

Ethanoic Acid, also known as acetic acid (\(CH_{3}COOH\)), ionizes as follows:

\(CH_{3}COOH\) → H+ + \(CH_{3}COO^{-}\)

Acetic acid donates a hydrogen ion (H+) to the solution, forming an acetate ion (\(CH_{3}COO^{-}\)).

In all cases, the acids dissociate in water, producing hydrogen ions (H+) as positively charged ions and their corresponding anions. The hydrogen ions are responsible for the acidic properties of these substances, while the anions contribute to the overall charge balance in the solution. The ionization of acids allows them to conduct electricity in aqueous solutions and react with other substances.

The question was incomplete. find the full content below:

Indicate the ionization of the following acids,

Tetraoxosulphate (VI) Acid

Trioxonitrate (V) Acid

Ethanoic Acid.​

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Answer:

Conduction:

Ice pack

Burning yourself

Grabbing warm coffee

Handle of the pot

Convection:

Warm air rising

An oven that cooks by cycling warm air

Warm water rising to the surface

Radiation:

Heat from the fire

Heat from the sun

Cooking popcorn using the microwave

Answer:

A positive charge of +1

Explanation:

The charge carried by atom depends on the number of protons and electrons present. The neutrons are not charged hence they do not contribute to the net charge of the specie.

The specie mentioned in the question has six protons and five electrons. Hence it has an excess of one positive charge hence a net charge of +1.

ANSWER:

ABCDFGHIJKLMNOPQRSTXYZ

The pressure exerted by a column of mercury that is about 760 mm high corresponds to approximately 0.987 atm.

To calculate the pressure exerted by a column of mercury, we can use the formula:

Pressure = density * gravity * height

Given:

Density of mercury = 13.6 g/cm³

Height of the mercury column = 760 mm = 76 cm

Acceleration due to gravity = 9.8 m/s²

First, we need to convert the height of the mercury column from centimeters to meters:

Height = 76 cm * (1 m / 100 cm) = 0.76 m

Now, we can calculate the pressure:

Pressure = 13.6 g/cm³ * 9.8 m/s² * 0.76 m

To ensure consistent units, we need to convert the density from grams per cubic centimeter (g/cm³) to kilograms per cubic meter (kg/m³):

Density = 13.6 g/cm³ * (1 kg / 1000 g) * (1 cm³ / (1e-6 m³))

Density = 13600 kg/m³

Plugging in the values into the pressure formula:

Pressure = 13600 kg/m³ * 9.8 m/s² * 0.76 m

Pressure = 99992.8 Pa

We can express the pressure in terms of atmospheric pressure:

1 atm = 101325 Pa (approximately)

To compare the pressure with atmospheric pressure, we can convert 99992.8 Pa to atm:

Pressure in atm = 99992.8 Pa / 101325 Pa/atm

Pressure in atm ≈ 0.987 atm

The pressure exerted by a column of mercury that is about 760 mm high corresponds to approximately 0.987 atm. Since atmospheric pressure near sea level is approximately 1 atm, this calculation supports the claim that atmospheric pressure near sea level is equivalent to the pressure exerted by a column of mercury about 760 mm high.

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Answer:

The correct answer is option C, that is, 1.36 L.

Explanation:

The reaction mentioned in the question is:  

Zn (s) + 2HCl (aq) ⇒ H2 (g) + ZnCl2 (aq)

It is clear that one mole of zinc is generating one mole of hydrogen gas as seen in the reaction. The mass of zinc mentioned in the question is 3.566 grams, the no of moles can be determined by using the formula,  

n = mass / molecular mass

The molecular mass of zinc is 65.39 g/mol, now putting the values in the formula we get,  

n = 3.566 g/ 65.39 g/mol

= 0.0545 mol

Based on the question, the partial pressure of water vapor is 18.65 mmHg and the atmospheric pressure is 752 mmHg. Therefore, the pressure of hydrogen gas will be,  

Pressure of hydrogen gas (H2) = 752 mmHg - 18.65 mmHg

= 733.35 mmHg

The liters of hydrogen gas produced can be calculated by using the equation, PV =nRT

R is the gas constant, having the value 62.36 L mmHg/K/mol and T is the temperature (273 + 21 = 294 K).  

Now putting the values in the equation we get,  

733.35 mmHg * V = 0.0545 mol * 62.36 mmHg/K/mol * 294 K

= 999.19 L / 733.35

= 1.36 L

Hence, the volume of hydrogen gas is 1.36 L.  

The density of the He nucleus is approximately 2.8 × 10^17 grams per cubic centimeter (g/cm³).

To calculate the density of the He nucleus, we need to know its mass and volume. Given that the diameter of the nucleus is approximately 2.0 fm, we can calculate its radius as 1.0 fm (since the radius is half the diameter).

The volume of a sphere can be calculated using the formula V = (4/3)πr³, where V is the volume and r is the radius. Substituting the values, we get:

V = (4/3)π(1.0 fm)³

Using the conversion factor that 1 fm = 1 × 10^-13 cm, we can convert the volume from fm³ to cm³:

V = (4/3)π(1.0 × 10^-13 cm)³

Simplifying the equation further, we have:

V = (4/3)π(1.0 × 10^-13)³ cm³

Now, to calculate the density, we need the mass of the He nucleus. The mass of a He nucleus is approximately 4 atomic mass units (4 amu).

Using the conversion factor that 1 amu = 1.66 × 10^-24 g, we can convert the mass from atomic mass units to grams:

Mass = 4 amu × (1.66 × 10^-24 g/amu)

Now we have both the mass and volume. The density (D) of an object is defined as mass divided by volume:

D = Mass/Volume

Substituting the values, we get:

D = (4 amu × 1.66 × 10^-24 g/amu) / [(4/3)π(1.0 × 10^-13)³ cm³]

Simplifying the equation and performing the calculations, the density of the He nucleus is approximately 2.8 × 10^17 g/cm³.

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Answer:humis

Explanation:because I looked it up

Answer:

It is C humus! also this is correct!

Explanation:

Here are some questions on Personal Care services on E2020 are:

An infection is the entrance and growth of dangerous microorganisms in the body that harm the host, such as bacteria, viruses, fungus, or parasites.

Infections can be systemic (affecting the entire body) or localized (affecting a particular area of the body), and they can be moderate to severe.

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The completed diagram gives an ionic compound that is 2 moles of Copper iodide ( 2CuI)

Ionic compounds do not exist as molecules. In the solid state, ionic compounds are in crystal lattice containing many ions each of the cation and anion.

There is rule for finding the correct formula.  In every ionic formula the cation is written first and the anion written second.  In the formula, the charge on one becomes the subscripts of the other.

So here, the formula for this compound can be written as CuI

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Answer:

what is the question

Explanation:

The density (in g/cm³) of a cube of metal that is 2 inches on a side and weighs 444.5 grams is 3.4 g/cm³ (1st option)

First, we shall obtain the volume of the metal. Details below:

Volume = L³

Volume = 5.08³

Volume = 131.1 cm³

Finally, we shall obtain the density of the metal. Details below:

Density = mass / volume

Density of metal = 444.5 / 131.1

Density of metal = 3.4 g/cm³

Thus, we can conclude from the above calculation that the density of the metal is 3.4 g/cm³ (1st option)

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Complete question:

What is the density (in g/cm³) of a cube of metal that is 2 inches on a side and weighs 444.5 grams?

3.4 g/cm³

8.89 g/cm³

55.56 g/cm³

0.180 g/cm³

Answer:

5

Explanation:

1km = 1,000m

5km = 5,000m = 1 light

25/5 = 5

Answer: D. Calcium and chloride atoms are held together by electrostatic

forces in a regular pattern.

The particles of calcium and chloride atoms are held together by electrostatic forces in a regular pattern ,therefore option (d) is correct.

Electrostatic forces are attractive or repulsive forces between particles that are caused by their electric charges.

The electrostatic bonding force is significant in chemistry because it bonds an ionic molecule.

The electrostatic force acts over a distance of about one-tenth the diameter of an atomic nucleus or 10⁻¹⁶ m.

The particles of calcium and chloride atoms are held together by electrostatic forces in a regular pattern ,hence option (d) is correct.

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We would expect to measure a pressure of approximately 75.25 kPa for the gas in the container at the higher temperature of 267 oC.

To determine the expected pressure of the gas in the container at the higher temperature, we can use the combined gas law, which relates the initial and final conditions of temperature and pressure in a fixed volume system. The combined gas law equation is given as:

(P1 * V1) / T1 = (P2 * V2) / T2

Where:

P1 = Initial pressure

V1 = Initial volume (which is fixed in this case)

T1 = Initial temperature

P2 = Final pressure (to be determined)

V2 = Final volume (which is fixed in this case)

T2 = Final temperature

In this scenario, the initial conditions are given as 3 oC (which is equivalent to 276 K) and 38.5 kPa. The final temperature is 267 oC (which is equivalent to 540 K). Since the volume is fixed, we can substitute the given values into the equation:

(38.5 kPa * V1) / 276 K = (P2 * V1) / 540 K

Simplifying the equation, we can cancel out V1:

38.5 / 276 = P2 / 540

Solving for P2:

P2 = (38.5 / 276) * 540 ≈ 75.25 kPa

Therefore, we would expect to measure a pressure of approximately 75.25 kPa for the gas in the container at the higher temperature of 267 oC.

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D?

Explanation:

considering they're all similar options I'd assume D, but there isn't any context

Based on the limit of dose, a patient will receive 8334 chest X-rays before noticing biological effects.

Recall :

Effective dose per exposure = 0.03 mSv

Expressing the effective dose per exposure in rem :

Let :

\( x \) = effective dose per exposure in terms of rem

\( 100 = 1 \)

\( x = 0.03 \times 10^{-3} \)

Cross multiply

\( x = 0.03 \times 10^{-3} \times 100 = 0.003 \)

Effective dose per exposure = 0.003 rem

For biological effect to be observed ;

Therefore, the Number of chest X rays a patient will undergo for biological effect to be observed is 8334.

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