At what temperature does 3.45 moles of n2 occupy a volume of 77.3 l at a pressure of 3.95 atm?

It have no definete points, with high kinetic energy ions, and called supercooled liquid.

When the constituent particles of a solid lack a regular three-dimensional configuration, the solid is said to be amorphous.

Crystalline solids are described as having highly organised arrangements of their atoms, ions, and molecules in tiny structures.

Amorphouse solids do not have definite no definite points and do not share the same wanderwal forces, so some of their particles melt faster than the other

Some substances that are normally crystalline may become amorphous if they are bombarding it with high-kinetic-energy ions.

A substance that retains certain liquid characteristics, even at temperatures at which it appears to be a solid is a super cooled liquid.

matches to the respective questions:

cubic= a

tetragonal= e

hexagonal =d

trigonal= f

orthorhombic= g

monoclinic= b

triclinic= c

simple cubic= i

face-centered cubic= h

body-centered cubic= j

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The increasing order of entropy for the substances given is as follows.

1. Ice

2. Water

3. Vaopr

Entropy is used to measure how random the particles in a system are. If the particles are in complete disarray, they have a higher entropy value. On the other hand, if they are perfectly arranged with no possible movement, then the substance has less or minimal entropy.

Entropy is one of the fundamental concepts in Thermodynamics and is associated with energy distribution in an isolated system. To be more precise, it also gives us different ways in which the particles can be distributed within the isolation.

In natural systems, entropy tends to increase with the passage of time, as all particles automatically turn toward disorders.

In the given cases, Ice has the least entropy as its solid particles have no room to move around, and their movements are restricted to vibrations only. Whereas for Vapor, due to very low forces between particles, they have near complete freedom of movement. Liquids like water come in between with their intermediate mobility.

Thus, the increasing order of entropy turns out to be Ice, Water, and Vapor.

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Answer:

I think C is the best answer but don't take my word for it

Explanation:

1 mole of BF3 is needed to produce 48.35 moles of NaF.

Given data :

The molecule of boron trifluoride is 1.5×1016 molecules

moles of NaF = 0.023816230233136  

48 NaF = 1.15x10^16 molecules

So, 1 mole of BF3 is needed to produce 48.35 moles of NaF.

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Answer:

C

Explanation:

ostriches are classified as diurnal

Answer: The answer is diurnal!

Explanation: Nocturnal animals, such as the owl or bat, stay awake during the night and sleep during the day! Which for diurnal animals, they sleep during the night, and roam around during the day! Such as us humans are both because some people may work during the night and sleep during the day! The most common for humans is us sleeping at night though and awake during the day!

Answer:

C

Explanation:

it's produced in the bone marrow

The shaking caused the temperature of the sand to rise because hey should notice an increase in sand temperature as the kinetic energy increases. This is due to the fact that the kinetic energy from their shaking is being converted to thermal energy in the sand.

The sand is a poor heat conductor because when the Sun warms it, the heat is not distributed evenly, making the surface hot. Also, because sand has a lower specific heat than water, when both are exposed to the same amount of light, the sand at the surface will experience a greater change in temperature.

When you rub your hands together, the action of scraping the surface of your skin back and forth against each other causes the molecules in your skin to move a little faster.

The faster that molecules move, the higher the temperature. So the friction of rubbing your hands together makes them feel warmer.

Thus, when you shake the sand the molecules move faster to make the temperature warmer.

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Manganese oxide (MnO2) and metallic aluminum react to create manganese metal and aluminum oxide. The mixture of the two reactants has a mole percentage of 67.2 percent (mol% Al).This reaction has several applications in the industry, including the creation of alloys, the removal of excess oxygen from metal and alloys, and the production of hydrogen gas.

The following is the balanced equation:MnO2 + 2Al → Mn + Al2O3The reaction equation shows that one mole of MnO2 reacts with two moles of aluminum to produce one mole of manganese and one mole of aluminum oxide. When the reaction equation is written in terms of moles, it indicates that 67.2 percent of the mixture is aluminum.

Mole percent MnO2 = (moles of MnO2 / total moles of reactants) x 100%Mole percent MnO2 = [1 / (1 + 2)] x 100%Mole percent MnO2 = 33.3%The total number of moles of reactants in the mixture can be determined using the mole percent of aluminum:Moles of Al = (mol% Al / 100) x total moles of reactantsMoles of Al = (67.2 / 100) x total moles of reactantsMoles of Al = 0.672 x total moles of reactants.

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Answer:

21.6 km/h

Explanation:

The final volume of solution in which [Cl–] = 0.233 M, using 3.61 g of CoCl3 219 L solution.

Thus, M, or moles/liter, is the sign for molarity. Additionally, chemists utilize square brackets to denote a reference to a substance's molarity. The molarity of the silver ion in solution, for instance, is shown by the formula [Ag+].

The most straightforward to calculate with but the most challenging to create in the lab are solution concentrations stated in molarity. When addressing chemical reactions in which a solute is a product or a reactant, such concentration units are helpful.

Then, in order to translate numbers in moles to amounts in grams, molar mass can be employed as a conversion factor. The terms "mol" and "L" in this statement stand for moles of solute.

Thus, The final volume of solution in which [Cl–] = 0.233 M, using 3.61 g of CoCl3 219 L solution.

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Answer:

Good environmental and weather conditions.

Explanation:

The main influence for a horse that will become a racehorse or farm horse are  good environmental and weather conditions. It also needs good food and proper training to made a racehorse. High quality race of a horse always prefer for making a racehorse because it has higher agility, speed, and spirit as compared to horse belongs to ordinary race.

The collision frequency and molecular orientation are incorporated in the value of the activation energy (Ea) in the Arrhenius equation.

The Arrhenius equation is a mathematical expression that describes the temperature dependence of reaction rates. It states that the rate constant (k) of a chemical reaction is directly proportional to the frequency of successful collisions between reacting molecules, and is given by the equation:

k = Ae^(-Ea/RT),

where A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature in Kelvin.

This equation predicts that as the temperature increases, the reaction rate will also increase due to the increase in collision frequency and molecular orientation, which are both incorporated in the activation energy (Ea).

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The total bond energy of products = 2 × 193 = 386 kJ/mol∆H = (242 kJ/mol) - (386 kJ/mol)∆H = -144 kJ/mol, the standard enthalpy change (∆H∘) for the given reaction is -144 kJ/mol.

The bond energies of Cl-Cl, Cl-Cl, and Cl-Cl are 242, 193, and 242 kJ/mol respectively. Use these values to calculate the standard enthalpy change (∆H∘) of the following reaction; Cl2(g) ⟶ 2Cl(g)The bond dissociation energy is the energy needed to break one mole of bonds, that is, how much energy must be supplied to one mole of a bond in gaseous state to break it into its constituent atoms also in gaseous state. The enthalpy change for the reaction is∆H = ∑ bond energies of the reactants - ∑ bond energies of the products or the given reaction: Cl2(g) ⟶ 2Cl(g)Reactants: 1 Cl-Cl bond with a bond energy of 242 kJ/molProducts: 2 Cl atoms with a bond energy of 193 kJ/mol each. So, the total bond energy of products = 2 × 193 = 386 kJ/mol∆H = (242 kJ/mol) - (386 kJ/mol)∆H = -144 kJ/mol, the standard enthalpy change (∆H∘) for the given reaction is -144 kJ/mol.

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Answer:

Explanation:

I can help you

Explanation:

When the water add acid there have the reaction then the molecules are evolve highly reactive which have produce bubble which cause our face directly but acid add in water there have less reactive molecules evolve ant there doesnot produce bubble

Flash flood along a normally dry river valley be a dangerous event densely populated area also river valley are so dangerous for flash flood

Flash flood is the move at very fast speed and can roll bounders also tear out tree and destroy building and destroy bridges also and wall of water can rich height 10 to 20 feet and and flash flood are so dangerous in the densely populated area as well as river valley it is so high risk for flash flood and flash flood is the more common in the area where dry climate and rocky terrain are seen because there is lack of soil and vegetation allow torrential rain to flow overland rather than infiltrate into the ground

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Human-made compounds known as hydrofluorocarbons (HFCs) have a global warming potential (GWP) of 12,000 and are responsible for contributing 7% to the modern greenhouse gas warming.

HFCs are synthetic gases commonly used as refrigerants and in various industrial applications. They are potent greenhouse gases with a high GWP, meaning they have a much greater warming effect compared to carbon dioxide (CO2). The GWP of 12,000 indicates that HFCs have 12,000 times the warming potential of CO2 over a specific timeframe.

While HFCs make up a relatively small percentage of greenhouse gas emissions, their impact on global warming is significant due to their high GWP. Efforts are being made to phase out the use of HFCs and replace them with more climate-friendly alternatives. The Kigali Amendment to the Montreal Protocol is an international agreement aimed at reducing the production and consumption of HFCs to mitigate their impact on climate change.

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2CH3OH()+302(g) → 2C02(g) + 4H₂O(l) is the reaction which shows a chemical change producing a gas.

One or more chemicals change into one or more other chemicals in a chemical reaction. A chemical reaction is the transformation of one or more substances, known as reactants, into one or more new substances, known as products. Chemical components or compounds make up substances. For instance, rust is created when iron and oxygen combine. When vinegar and baking soda are combined, sodium acetate, carbon dioxide, and water are the results. things igniting or detonating.

There are five types of chemical reaction that occur generally, they are

Single displacement, double displacement, combustion, combination or synthesis, and decomposition.

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When 45.0 mL of a 1.90 M H₂SO₄ solution is added to 95.0 mL of 0.600 M H₂SO₄the molarity of the resulting solution is 0.95 M.

To answer the question, we need to know what molarity is.

Molarity is the number of moles per unit volume with volume in liters.

To find the molarity of the resulting solution, we need to find the number of moles in each solution.

Number of moles, n = MV where

Given that we have 45.0 mL of a 1.90 M H₂SO₄ solution.

M' = 1.90 M and V' = 45.0 mL = 0.045 L

So, n' = M'V'

= 1.90 M × 0.045 L

= 0.0855 mol

Given that we have 95.0 mL of 0.600 M H₂SO₄ solution.

M" = 0.600 M and V" = 95.0 mL = 0.095 L

So, n" = M"V"

= 0.600 M × 0.095 L

= 0.057 mol

The number of moles in the resulting solution is n'" = n' + n"

= 0.0855 mol + 0.057 mol

= 0.1425 mol

The volume of the resulting solution is V"' = V' + V"

= 45.0 mL + 95.0 mL

= 150.0 mL

= 0.15 L

The molarity of the resulting solution is M'" = n"'/V"'

= 0.1425 mol/0.15 L

= 0.95 mol/L

= 0.95 M

So, the molarity of the resulting solution is 0.95 M.

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Answer:

i believe it is a

Explanation:

The reason is :a.They can gain more food for their offspring

Animals tend to protect their territory because they don't want  intruders to invade their territory.

Animals majorly protect their territory in order to protect their foods from been eating by intruders as this will enables their offerings to have enough foods to eat.

They as well guard  their territory in order to prevent intruders from invading the place they have prepare as their mating place.

Inconclusion  The reason why some animals defend  their territory after they have mated

and reproduced is :a.They can gain more food for their offspring

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Answer:

Removing the dirty water and replacing with fresh water. also the fish containing in the aquarium change the system of aquarium.

Answer:

yes...Sodium reacts with oxygen to form sodium oxide and has the following balanced chemical equation: 4 Na + O2 → 2 Na 2O.

There are four sodium atoms in the product.

A reaction equation is said to be balanced when the number of atoms of reactants are equal to the number of atoms of products according to the balanced reaction equation.

Given the reaction between sodium metal and oxygen, the reaction could be written as; 2Na(s) + O2(g) ----> 2Na2O(s). We can see that there are four sodium atoms in the product.

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Methanol's combustion enthalpy can be calculated at -540 (kJ mol-1).

Methanol, the most basic form of alcohol (CH3OH), serves as the chemical basis for countless items used in daily life, such as paints, plastics, auto parts, and building supplies. Additionally, methanol is a renewable resource that powers fuel cells, boilers, cook stoves, ships, automobiles, trucks, and buses.

Energy required to dissociate the bonds connecting reactants

3 × 413 + 358 + 464 + 1.5 × 498 (kJ mol-1) / 2808 (kJ mol-1);

Total energy released when products form bonds

4 × 464 + 2 × 746 (kJ mol-1) / 3348 (kJ mol-1);

∆H = -540 (kJ mol-1).

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The complete question is -

Methanol is made in large quantities as it is used in the production of polymers and in fuels.

The enthalpy of combustion of methanol can be determined theoretically or experimentally.

CH₃OH(l) + 1 O₂(g) → CO₂(g) + 2H₂O(g)

Using the information from Table 10 of the Data Booklet, determine the theoretical enthalpy of combustion of methanol.

The given cell notation represents a redox reaction where barium (Ba) is oxidized at the anode, releasing electrons, while copper (Cu) is reduced at the cathode, gaining electrons.

The cell notation ba(s) ∣ ba2 (aq) ‖ cu2 (aq) ∣ cu(s) represents a galvanic cell with two half-cells separated by a salt bridge. In the anode compartment (left side), solid barium (Ba) is oxidized to barium ions (Ba2+). This can be represented by the half-reaction:

Ba(s) → Ba2+(aq) + 2e^-

At the cathode compartment (right side), copper ions (Cu2+) are reduced to solid copper (Cu) by gaining electrons. This can be represented by the half-reaction:

Cu2+(aq) + 2e^- → Cu(s)

Overall, the redox reaction can be obtained by combining the two half-reactions:

Ba(s) + \(Cu_2+(aq)\) → \(Ba_2+(aq)\) + Cu(s)

In this reaction, barium is oxidized (loses electrons) and copper is reduced (gains electrons), making it a redox reaction. The electrons released by barium at the anode flow through the external circuit to the cathode, where they are consumed in the reduction of copper ions. This flow of electrons generates an electric current in the cell.

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Approximately 2273.5 Joules of heat need to be supplied to the parcel of air to maintain its temperature at 300 K as it expands reversibly and isothermally from 22 dm^3 to 30.0 dm^3 as it ascends.

We can use the equation:
Q = n * R * T * ln(V2/V1)
where:
Q is the heat needed (in joules)
n is the number of moles of air molecules (1.00 mol)
R is the ideal gas constant (8.314 J/mol·K)
T is the temperature (300 K)
ln is the natural logarithm function
V1 is the initial volume (22 dm^3)
V2 is the final volume (30.0 dm^3)

Plugging in the values, we have:
Q = (1.00 mol) * (8.314 J/mol·K) * (300 K) * ln(30.0 dm^3 / 22 dm^3)

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Answer:

When solid oxalic acid dissolved in water, it dissociates ,  H+ - ions is formed, so acidic properties can be observed.

Explanation:

When solid oxalic acid dissolved in water, it dissociates ,  H+ - ions is formed, so acidic properties can be observed.

C2H2O4 ----> \(H^{+}\) + \(C_{2}HO_{4}^{-}\)

\(C_{2}HO_{4}^{-} ----> H^{+} + C_{2}O_{4}^{2-}\)

When oxalic acid is solid, there are no free moving H+ - ions , so acidic properties can not be observed.

Answer:

11 and equals the number of protons

Explanation:

N-O bond as well as a double bond. The N atom possesses a positive charge and an unpaired electron. These are the two principal resonance sources of NO2.

Because each nitrogen atom requires three electrons to fill its outermost shell, nitrogen atoms will establish three covalent bonds (also known as triple covalent) between two nitrogen atoms. Methane (CH4) is another molecule that contains a nonpolar covalent link. There are two sigma bonds and one pair of unpaired electron in nitrogen dioxide. There are an octet of electrons in each of the two oxygen atoms. With the oxygen atom, the nitrogen atom's p orbital forms a pi connectio

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To obtain the percent by mass, we need the molar mass of the compound. Option A

We know that a compound is composed of so many elements. The amounts of each of the elements that makes up the compound would always vary. We may need to find the mass of the element that is in a compound as it is expressed as a percentage.

If we want to make this kind of calculation, we would need to find out the molar mass of the compound and then we would also have to know the relative atomic mass of the element that is in question.

Thus, the most important things that we need to get the percentage of the element in the compound is the molar mass and the mass of the element.

The formula that we need to use is;

Mass of the element/ Molar mass * 100/1

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According to the law of conservation of mass, there is no net change in the reactants' and products' masses before and after a chemical reaction.

Chemical reaction is defined as a procedure where one or more compounds, known as reactants, are changed into one or more new substances, known as products. When atoms establish or break chemical bonds, chemical reaction take place.

Law of conservation of mass is defined as a chemical reaction requires that the total mass of the reactants and products be equal. Law of conservation of mass also stated that mass is always conserved throughout chemical reactions and cannot be created or removed.

Thus, according to the law of conservation of mass, there is no net change in the reactants' and products' masses before and after a chemical reaction.

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