Hi I really need help

ANSWER

The final pressure of the gas is 155mmHg

EXPLANATION

Given that:

The initial pressure of the gas is 40mmHg

The initial temperature of the gas is 77K

The final temperature of the gas is 298K

To find the final pressure, follow the steps below

In the given data, the volume of the container is fixed. Hence, the process is an Isochoric.

Step1: Write the gas law at constant volume

Step 2: Substitute the given data into the formula in step 1 to find P2

Hence, the final pressure of the gas is 155mmHg

The group 1 metals placed in the periodic table is called as the Alkali metals. because of their oxides and the hydroxide form alkaline solution with water.

The group 1 elements called as the alkali metal as their oxides and their hydroxides form the alkaline solution with the water. The alkali metals are given as :

These elements are the metals except the hydrogen . the hydrogen element is the non metal nut place in the group 1. the hydrogen is the exception. the alkali metals are very reactive.

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The periodic table's group 1 metals are referred to as alkali metals. due to the formation of an alkaline solution with water by their oxides and hydroxides.

When combined with water, the group 1 elements known as the alkali metals' oxides and hydroxides create an alkaline solution. The following are the alkali metals:

Hydrogen - H

Rubidium - Rb

Lithium - Li

Sodium - Na

Potassium - K

Francium - Fr

Cesium - Cs

With the exception of hydrogen, these elements are all metals. The non-metal  spot in group one is occupied by the hydrogen element. The exception is hydrogen. The reactiveness of alkali metals is high. it is due to only 1 electron in the outer most energy shell which is not under high attraction from the nucleus due to shielding effect of inner electrons.

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Answer:

-

They move faster than molecules of a liquid or gas

They move faster than molecules of a liquid or gas and have no attraction to each other. So, the correct options are (B) and (D).

A gas is defined as a sample of matter which conforms to the shape of a container in which it is placed and attains a uniform density inside the container, even in the presence of gravity and regardless of the amount of substance in the container.

This is type of fluid like air which has neither independent shape nor volume but tends to expand indefinitely.

Gases have certain properties like

1. Easy to compress

2. Expand to fill the containers

3. Occupy much more space than the liquid or solid materials from which they are made.

Thus, they move faster than molecules of a liquid or gas and have no attraction to each other. So, the correct options are (B) and (D).

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Answer:

Convection currents are a circular current caused by the difference in temperatures from the bottom to the top of the mantle. It is because of these currents that the plates of the Earth have moved in the past and are moving today. These plate movements cause earthquakes, mountain building, and volcanism.

Explanation:

The sodium-potassium pump forces sodium ions out of the cell and potassium ions into the cell.

The sodium-potassium pump is an essential membrane protein found in almost all animal cells. It plays a crucial role in maintaining the electrochemical gradient and regulating cellular processes. The primary function of the sodium-potassium pump is to transport sodium ions (Na+) out of the cell and potassium ions (K+) into the cell.

The pump utilizes energy from ATP (adenosine triphosphate) hydrolysis to actively transport these ions against their concentration gradients. The process involves several steps:

Binding of intracellular Na+ ions: Inside the cell, the pump has a higher affinity for sodium ions. Three sodium ions bind to specific sites on the pump's cytoplasmic side.

ATP hydrolysis: ATP (adenosine triphosphate) binds to the pump, causing it to undergo phosphorylation. This provides the necessary energy for the subsequent ion transport.

Release of Na+ ions outside the cell: As a result of ATP hydrolysis, a conformational change occurs in the pump that exposes the bound sodium ions to the extracellular side. The sodium ions are then released into the extracellular space.

Binding of extracellular K+ ions: At the same time, two extracellular potassium ions bind to the newly exposed sites on the pump.

Dephosphorylation and release of K+ ions inside the cell: After the potassium ions bind, the pump undergoes dephosphorylation, restoring its original conformation. This causes the potassium ions to be transported into the cell.

By actively transporting sodium ions out and potassium ions into the cell, the sodium-potassium pump helps establish and maintain the electrochemical gradient across the cell membrane. This gradient is vital for various cellular functions such as nerve impulse transmission, muscle contraction, and the regulation of osmotic balance.

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At high temperatures, a diatomic molecule possesses a total of six degrees of freedom.

Because a gas molecule may travel in any direction, it has three translational degrees of freedom. This is true for all gas molecules, whether monatomic, diatomic, or polyatomic, since every molecule in three-dimensional space may travel freely in all directions.

As a result, a diatomic molecule possesses five degrees of freedom: three translational and two translational.

As a result, a diatomic gas molecule possesses 6 degrees of freedom. This set may be divided into molecular translations, rotations, and vibrations. Three degrees of freedom are accounted for by the whole molecule's center of mass motion.

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The symbolic equation that indicates the dissolution of calcium oxide in water is CaO+H2O→Ca(OH)2+Δ

Calcium oxide+water →

Calcium hydroxide+heat

Calcium oxide can be defined as quicklime, is a widely used chemical compound. It is a white, caustic, alkaline and crystalline solid at room temperature.

Calcium oxide is used for purifying sugar in preparing bleaching powder, calcium carbide and calcium cyanamide. Its other uses are in water softeners, mortars and cement.

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(a) Paper burning with a bright flame is an exothermic reaction.

(b) Plastics becoming brittle after being left in the sun is an endothermic reaction.

(c) A firecracker exploding is an exothermic reaction.

Exothermic reactions are those that release energy in the form of heat or light. In the case of paper burning, the energy stored in the paper's chemical bonds is released as heat and light, making it an exothermic reaction.

Endothermic reactions are those that absorb energy from the surroundings, causing the temperature to decrease. Plastics becoming brittle after being left in the sun is an endothermic reaction because the energy from the sun is absorbed by the plastic, causing it to break down and become brittle.

An exothermic reaction occurs when energy is released in the form of heat or light, which is what happens when a firecracker explodes. The chemicals inside the firecracker react with each other, releasing energy in the form of heat and light, which creates the loud bang and the explosion.

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Phosphorous at 18.9%. According to analysis, sodium, phosphorus, and oxygen make up 42.1%, 18.9%, and 39% of sodium phosphate, respectively.

The ratio of the amounts of each element to the sum of the individual element amounts present in the compound, multiplied by 100, is the definition of the percentage of a given compound. In this instance, the quantity is expressed in grams of the constituent ingredients.

The proportional mass of each component of a compound is known as the percent composition. The mass percent of a compound is the weight of an element expressed as a share of the complex's overall mass. For instance, a molecule of water has a structure of one oxygen atom and two hydrogen atoms.

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Ionic bonds will be a metal + a nonmetal, and electrons

are transferred from the metal to the nonmetal.

A covalent bond will be a nonmetal only. Nonmetals will not give up their electrons so electrons are shared.

I have also written this on the whiteboard in the image provided.

The type of material that most likely can be removed through​ is suctioning A. It is soft and fluid.

Suctioning is a medical procedure used to remove materials from the body, typically from the airway or other body cavities. The type of material that can most likely be removed through suctioning is usually soft and fluid in nature. Here's why:

A. It is soft and fluid: Suctioning is commonly used to remove substances such as mucus, saliva, blood, vomit, or other bodily fluids that may obstruct the airway or interfere with normal bodily functions. These materials are typically soft and have a fluid consistency, making them easier to remove using suctioning equipment. Suctioning helps clear the airway or body cavities by creating negative pressure that draws the material into a suction device.

B. It is hard and solid: Hard and solid materials are generally not suitable for removal through suctioning. Suctioning is not designed to extract solid objects from the body. In cases where a solid object is lodged in the airway or body cavity, alternative procedures such as forceps, tweezers, or other specialized instruments may be necessary for removal.

C. It cannot be removed manually: The use of suctioning is often required when a material cannot be effectively removed manually. For example, if there is excessive mucus or fluid buildup in the airway, it may be difficult to clear it by coughing or using other non-invasive methods. Suctioning provides a more efficient and controlled way to eliminate these materials.

D. It cannot be seen: While some materials that require suctioning may not be readily visible, it is not a defining characteristic. Suctioning is often performed in situations where the material is visible, such as removing excess saliva or secretions during surgery, clearing the airway of visible mucus, or draining fluid from body cavities.

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Answer:

Each of the four blocks of the periodic table is the collection of elements that have common valence orbitals, or that their valence are found in one of the four orbitals with azimuthal quantum number 0, 1, 2, or 3 which corresponds to the shape (s), principal (p), diffuse (d), or fundamental (f) orbitals respectively

The maximum number of electrons in the s-orbital = 2 electrons

The maximum number of electrons in the p-orbital = 6 electrons

The maximum number of electrons in the d-block = 10 electrons

The maximum number of electrons in the f-orbital = 14 electrons

Therefore, given that the elements of the within each of the blocks have their valence electron in the corresponding orbital in which they are located on the periodic table, given the periodic nature of the periodic table, the width of each block of elements corresponds to the maximum number of elements that can be found in their valence orbital.

Therefore, we have;

The width of the s-block elements = 2 block units

The width of the p-block elements = 6 block units

The width of the d-block elements = 10 block units

The width of the f-block elements = 14 block units

Explanation:

Answer:

1.  Splitting

2. Combine

Explanation:

Answer:

The new volume of gas is 550.24L.

Explaining

The new volume of gas can be calculated using Boyle's Law, which states that the pressure and volume of a gas are inversely proportional when the temperature is constant.

Boyle's Law: P1V1 = P2V2

Where:

P1 = initial pressure

V1 = initial volume

P2 = final pressure

V2 = final volume

Given:

P1 = 3.78 atm

V1 = 750 L

P2 = 523 kPa

Note: The pressure should be in the same units, so we need to convert kPa to atm.

1 atm = 101.325 kPa

523 kPa ÷ 101.325 kPa/atm = 5.15 atm

P2 = 5.15 atm

Substituting the given values into Boyle's Law:

P1V1 = P2V2

3.78 atm × 750 L = 5.15 atm × V2

Solving for V2:

V2 = (3.78 atm × 750 L) ÷ 5.15 atm

V2 = 550.24 L

Therefore, the new volume of gas is 550.24 L.

Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.

Thus, According to Dalton's Law, a perfect gas mixture's total pressure equals the sum of its constituent gases' individual partial pressures.

The thermodynamic activity of a gas's molecules is gauged by its partial pressure. Gases react, disperse, and dissolve based on their partial pressures rather than the concentrations they have in liquids or other gas combinations.

This general characteristic of gases holds true in biological chemical interactions involving gases.

Thus, Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.

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The strongest type of intermolecular force between solute and solvent in the solution of CH\(_{3}\)Cl (g) in CH\(_{3}\)OCH\(_{3}\) (g) is dipole-dipole interaction.

In  CH\(_{3}\)Cl, the molecule has a polar covalent bond between carbon and chlorine atoms. Chlorine is more electronegative than carbon, resulting in a partial negative charge on chlorine and a partial positive charge on carbon. In  CH\(_{3}\)OCH\(_{3}\) , the molecule is also polar due to the oxygen atom's higher electronegativity compared to carbon and hydrogen. This creates a dipole moment in both molecules.

In the solution, the positive end of the  CH\(_{3}\)Cl molecule interacts with the negative end of the  CH\(_{3}\)OCH\(_{3}\) molecule, forming dipole-dipole interactions. These intermolecular forces are stronger than London dispersion forces, which are present in all molecules but are typically weaker. Therefore, the strongest intermolecular force in this solution is dipole-dipole interaction.

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List 1 is the best choice of materials because it has a balance between biotic decomposers and abiotic factors needed for the worms and composting.

Composting is the process whereby remains of organic matter are keep in a favorable environment and conditions in order to allow for decomposition.

Compost consists of the right mix of biotic factors suchas worms and fungi as well as abioticfactors such as water and sun.

Therefore, based in the materials provided, List 1, because it has a balance between biotic decomposers and abiotic factors needed for the worms and composting.

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a. The balanced equation for the synthesis of ammonia gas is: N\(_{2}\) + 3H\(_{2}\) → 2NH\(_{3}\).

b. The volume of ammonia gas produced is approximately 1934.74 liters.

To determine the volume of ammonia gas produced, we need to use the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Given:

Mass of nitrogen = 10 kg

Temperature = 550°C = 823 K

Pressure = 250 atm

First, we need to calculate the number of moles of nitrogen. The molar mass of nitrogen (N\(_{2}\)) is approximately 28 g/mol. Using the given mass of nitrogen (10 kg), we can convert it to grams (10,000 g) and then divide by the molar mass to get the number of moles (357.14 mol).

From the balanced equation for the synthesis of ammonia (N\(_{2}\) + 3H\(_{2}\) → 2NH\(_{3}\)), we know that 1 mole of nitrogen reacts to produce 2 moles of ammonia.

Therefore, the number of moles of ammonia produced is twice the number of moles of nitrogen, which is 2 * 357.14 = 714.29 mol.

Now, we can use the ideal gas law to calculate the volume of ammonia gas. Rearranging the equation, V = (nRT) / P, we can plug in the values:

V = (714.29 mol * 0.0821 L·atm/(mol·K) * 823 K) / 250 atm = 1934.74 L.

So, the volume of ammonia gas produced is approximately 1934.74 liters.

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There are approximately 12.7 grams of phosphorus in a 50-gram sample of aluminum phosphate.

To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to know the molar mass and the chemical formula of aluminum phosphate.

The chemical formula for aluminum phosphate is AlPO4. It indicates that each molecule of aluminum phosphate contains one aluminum atom (Al), one phosphorus atom (P), and four oxygen atoms (O).

To calculate the molar mass of aluminum phosphate, we can add up the atomic masses of its constituent elements based on their stoichiometric ratios:

Molar mass of AlPO4 = (molar mass of Al) + (molar mass of P) + (4 * molar mass of O)

Using the periodic table, we can find the atomic masses of the elements:

Molar mass of Al = 26.98 g/mol

Molar mass of P = 30.97 g/mol

Molar mass of O = 16.00 g/mol

Now, let's calculate the molar mass of aluminum phosphate:

Molar mass of AlPO4 = (26.98 g/mol) + (30.97 g/mol) + (4 * 16.00 g/mol)

= 121.95 g/mol

The molar mass of aluminum phosphate is 121.95 g/mol.

To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to calculate the mass fraction of phosphorus in the compound. The mass fraction is the ratio of the molar mass of phosphorus to the molar mass of aluminum phosphate.

Mass fraction of phosphorus = (molar mass of P) / (molar mass of AlPO4)

= (30.97 g/mol) / (121.95 g/mol)

≈ 0.254

Multiplying the mass fraction by the mass of the sample gives us the grams of phosphorus:

Grams of phosphorus = (mass fraction of phosphorus) * (mass of the sample)

= 0.254 * 50 g

≈ 12.7 g

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Answer:

Explanation:

The emissions trading program work to set an environmental goal to control pollution. The program is working to reduce the overall pollution effect by

Install pollution control technology, such as a scrubber to remove pollution before it comes out of the smokestack.

Replace existing pollution controls with more advanced technologies.

Tune-up existing controls so they run better.

Switch to alternative fuels that emit less pollution.

Shift production to lower emitting or more efficient units.

Answer:Matter is made up of only charged particles.

Explanation: Took the test

Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question

mass = 4500 g

density = 20.5 g/cm³

We have

\(volume = \frac{4500 }{20.5} \\ = 219.51219...\)

We have the final answer as

Hope this helps you

answer and explanation

1 L = 1000 mL

and so to determine 7.8L we can o the calculation as follows

x mL = 1000 mL/ 1 L x 7.8 L/1 = 7800 mL/1 = 7800 mL

Answer:

I believe the answer you're looking for is DNA, not sure though