I am a common cation that is found in the alkali group. I am found in salt. I have a +1 charge. What am I?

The value for the reaction quotient is 0.0553, the value for the temperature is 362.15 K, the value for n = 2, and the standard cell potential for Mg(s) + Fe²⁺(aq) → Mg²⁺(aq) + Fe(s) is -3.14 V.

The reaction quotient, Q, for the cell is given by;

Q = [Mg²⁺][Fe(s)]/[Mg(s)][Fe²⁺]

Substituting the given values;

Q = (0.210)(1)/1(3.80) = 0.0553

The temperature, T, in Celsius is given as 89°C. To convert to kelvins, we add 273.15 to get;

T = (89 + 273.15) K = 362.15 K

The balanced equation for the reaction is;

Mg(s) + Fe²⁺(aq) → Mg²⁺(aq) + Fe(s)

The number of electrons transferred in the reaction is 2

So n = 2.

The standard cell potential, E°cell, can be calculated using the formula:

E°cell = E°cathode - E°anode

where E°cathode is the standard reduction potential for the cathode (Mg²⁺ + 2e⁻ → Mg) and E°anode is the standard oxidation potential for the anode (Fe²⁺ → Fe + 2e⁻).

The standard reduction potential for Mg²⁺ + 2e⁻ → Mg is -2.37 V, and the standard oxidation potential for Fe²⁺ → Fe + 2e⁻ is +0.77 V. Substituting these values, we get:

E°cell = (-2.37) - (+0.77) = -3.14 V

Therefore, the standard cell potential for Mg(s) + Fe²⁺(aq) → Mg²⁺(aq) + Fe(s) is -3.14 V.

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Part A: To find the reaction quotient, Q, use the formula:
Q = [Mg2+]/[Fe2+]
Given the concentrations: [Fe2+] = 3.80 M and [Mg2+] = 0.210 M, plug these values into the equation:
Q = (0.210)/(3.80) = 0.0553

Part B: To convert the temperature from Celsius to Kelvin, use the formula:
T(K) = T(°C) + 273.15
Given the temperature: 89°C, plug the value into the equation:
T = 89 + 273.15 = 362.15 K
Part C: The value of n represents the number of electrons transferred in the redox reaction. In this case, both Mg and Fe undergo a change of 2 in their oxidation states (Mg goes from 0 to +2, and Fe goes from +2 to 0). So, n = 2.
Part D: To calculate the standard cell potential (E°), use the standard reduction potentials for the half-reactions. The standard reduction potential for Mg2+/Mg is -2.37 V, and for Fe2+/Fe is -0.44 V. Since Mg is being oxidized, reverse the sign of its potential:
E° = E°(cathode) - E°(anode) = (-0.44) - (-2.37) = 1.93 V
So, your answers are:
Part A: Q = 0.0553
Part B: T = 362.15 K
Part C: n = 2
Part D: E° = 1.93 V

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Answer:

algae, zooplankton

Explanation:

Algae photosynthesize to make their own food using sunlight. Algae produces energy and this energy is transferred when it is consumed by the zooplankton.

NH3 has 1 Nitrogen atom and 3 hydrogen atoms.

Answer is : It is a good thermal and electrical conductor. -The main point to be noted is that aluminium is a highly reactive element and still it is used for making cooking utensils. The reason is that aluminium has a very high affinity for oxygen. So, it reacts with oxygen and forms a layer of aluminium oxide on its surface.

Answer:

This is because aluminium reacts with oxygen present in air to form a thin layer of aluminium oxide . This oxide layer is very stable and prevents further reaction of aluminium with oxygen . Also , it is light in weight and a good conductor of heat Hence , it is used to make cooking utensils .

Explanation:

Believe it

The volume of water that has the same mass as 100 cm³ of gold is 1,932 cm³.

To find the volume of water which has the same mass as 100 cm³ of gold, the volume of the water and the mass of the gold needs to be taken into consideration. A gold of 100 cm³ has a certain mass and to find the volume of water which has the same mass as the gold, the following formula can be used;

Density = Mass ÷ Volume

Density is equal to the mass of the object divided by the volume of the object. In other words, it tells us how tightly matter is packed together. By rearranging the formula, Volume can be calculated;

Volume = Mass ÷ Density

Density of gold = 19,320 kg/m³

Therefore, the mass of 100 cm³ of gold can be converted to volume of water which has the same mass as gold using the formula:

Volume = Mass of Gold ÷ Density of Water

Here, the volume of gold is 100 cm³.

1 cm³ = 0.000001 m³

Since mass of gold is not given, let's assume that the gold is of a certain mass of 19,320 kg/m³.

Hence,

Mass of Gold = 19,320 x (100 x 10^-6)

Mass of Gold = 1.932 kg/m³

Volume of Water = Mass of Gold ÷ Density of Water

The density of water is approximately equal to 1,000 kg/m³

Therefore,

Volume of Water = Mass of Gold ÷ Density of Water

Volume of Water = 1.932 ÷ 1,000

Volume of Water = 0.001932 m³

To convert 0.001932 m³ into cm³,

it can be multiplied by 1,000,000.

Hence, Volume of Water = 1,932 cm³

Therefore, the volume of water that has the same mass as 100 cm³ of gold is 1,932 cm³.

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The size and mass of an atom are determined by the number of protons, neutrons, and electrons it contains and can increase or reduce size & mass.

Protons and neutrons are the subatomic particles responsible for most of the mass of an atom. Protons have a mass of approximately 1 atomic mass unit (amu), while neutrons have a slightly larger mass of approximately 1.008 amu. Electrons, on the other hand, have a much smaller mass of approximately 0.0005 amu.

The number of protons and neutrons in an atom determines its atomic mass, which is the sum of the masses of all its protons and neutrons. The number of electrons determines the chemical properties of an atom and how it interacts with other atoms.

In summary, subatomic particles, such as protons, neutrons, and electrons, do not have the ability to increase or decrease the size and mass of an atom. Rather, they determine the fundamental properties of an atom, including its size, mass, and chemical behaviour.

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Answer:

2.8J

Explanation:

Given parameters:

Specific heat capacity  = 0.129J/g°C

Mass  = 0.7g

Initial temperature  = 53°C

Final temperature  = 22°C

Unknown:

Quantity of heat released  = ?

Solution:

To solve this problem, we use the expression below;

       H  = m c Ф

 H is the quantity of heat released

m is the mass

 c is the specific heat capacity

  Ф is the change in temperature

Now,

  Insert the given parameters and solve;

  H  = 0.7 x 0.129 x (22  - 53)  = -2.8J

The amount of heat released is 2.8J, the negative depicts the heat released.

A total volume of 27.03 ml of KOH is required to neutralize 82 ml of 0.150M Nitrous acid.

Let us first write the balanced chemical equation of reaction of KOH and HNO₂,

KOH + HNO2 → KNO₂ + H₂O

From the reaction, we can see,

One mole of KOH reacts completely with one mole HNO₂ to form KNO₂ and H₂O.

So,

One mole KOH = One mole HNO₂

We also know,

Molarity = moles/volume of solution

So,

Moles = molarity × volume of solution

Moles of KOH = 0.455 × V

Moles of HNO₂ = 0.150 × 82

So,

0.455 × V = 0.150 × 82

V = 27.03ml

So, the volume of KOH required is 27.03 ml.

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Answer:

250 ml

Explanation: I got it right on the lab.

The size of the volumetric flask that would you use to create a 1.25 M solution using 29.75 g of MgCl₂ is 250mL.

How do we calculate volume of the solution?

Volume (V) in liter of the solution will be calculated by using the molarity (M) formula as:

M = n/V, where

n is the moles of the solute and it will be calculated by using mass as:

n = W/M, where

W = given mass

M = molar mass

Moles of 29.75g of MgCl₂ = 29.75g / 95g/mol = 0.313 mol

Given that molarity of solution = 1.25M

On putting values on the equation of molarity we will get the value of volume as:

V = 0.313 / 1.25 =  0.2504 L = 250mL

For the preparation of 250 mL of MgCl₂ solution we required the volumetric flask of 250 mL.

Hence volumetric flask of 250mL is required.

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Gaseous gallium will consist of atoms separated from each other by a large distance and do not experience inter-particle attractive forces.

There are three states of matter;

Matter can exist in all these states of matter depending on the extent of inter-particle attractive forces in the substance.

Inter-particle attractive forces are strongest in solids hence they have a definite shape and volume and do not flow.

Liquids have weaker inter-particle attractive forces than solids hence liquid particles can flow. Liquids have a definite volume but not a definite shape.

Gases have almost no inter-particle attractive forces between particles hence gas particles are separated by large distances and move at very high velocities. A gas does not have definite shape or volume.

A model of gaseous gallium will show atoms of gallium separated by large distances and do not experience inter-particle attraction.

A model of gas particles is shown in the image attached to this answer.

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The formation of molecule can easily be shown by drawing Lewis dot structure. In given molecule, C\(_4\)H\(_6\), the carbon chain is like this C=C-C=C.

Lewis dot structure is a way to represent the valence electron of an element in the form of dot. These are mainly beneficial in understanding the chemical formula of covalent compound.

In given molecule, C\(_4\)H\(_6\), the carbon chain is like this C=C-C=C. From this we can see that the corner carbon have two hydrogen attached to it using one electron of carbon. So, now corner carbon has two electrons left which will form double bond with the central carbon. The central carbons forms double bond with corner carbon using two electrons and one bond with hydrogen using one electron and one left electron is used in making bond with other central carbon.

Therefore,  in given molecule, C\(_4\)H\(_6\), the carbon chain is like this C=C-C=C.

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The power required by the "active Na⁺ pumping" system to produce this flow against the +25 mV potential difference is approximately 4 × 10⁻¹⁷ W.

To calculate the power required by the "active Na⁺ pumping" system, we need to consider the current (rate of ion movement) and the potential difference across the axon. Power is given by the equation:

Power = Current × Voltage

Given:

Current (I) = 5 × 10⁻⁷ mol/(m²·s)

Voltage (V) = +25 mV = +25 × 10⁻³ V (since 1 mV = 10⁻³ V)

To determine the power, we need to convert the current to amperes (A) and multiply it by the voltage:

I (in A) = Current × elementary charge (e)

e = 1.6 × 10⁻¹⁹ C (charge of an electron)

Now we can calculate the power:

Power = I × V

First, let's convert the current from mol/(m²·s) to A/m²:

I (in A/m²) = Current (in mol/(m²·s)) × Avogadro's number (Nₐ) / time (s)

Nₐ = 6.022 × 10²³ mol⁻¹ (Avogadro's number)

Now, we can calculate the power:

Power = I (in A/m²) × V (in V)

Note: We assume the axon is a cylinder with a circular cross-section.

Given:

Length of axon (L) = 10 cm = 0.1 m

Diameter of axon (d) = 20 μm = 20 × 10⁻⁶ m

To calculate the cross-sectional area (A) of the axon, we use the formula for the area of a circle:

A = π × (d/2)²

Now, we can calculate the power:

Power = I (in A/m²) × V (in V) × A (in m²)

Substituting the given values:

A = π × (20 × 10⁻⁶ / 2)² = π × 100 × 10⁻¹² m²

Power = (5 × 10⁻⁷ A/m²) × (25 × 10⁻³ V) × (π × 100 × 10⁻¹² m²)

Simplifying the expression:

Power ≈ 4 × 10⁻¹⁷ W

Rounding to one significant figure, the power required by the "active Na⁺ pumping" system to produce this flow against the +25 mV potential difference is approximately 4 × 10⁻¹⁷ W.

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Answer:

Ver explicacion

Explanation:

Cristalización y disolución de cloruro de sodio: equilibrio físico dinámico

Conversión de oxígeno gaseoso en ozono - equilibrio químico

Condensación y evaporación de un líquido - equilibrio físico dinámico

Reacción entre H2 y 12 para producir Hl - equilibrio químico

Una solución saturada de azúcar - equilibrio físico dinámico

El equilibrio alcanzado en los procesos físicos se llama procesos físicos. El equilibrio físico se llama. Ejemplos de tales procesos físicos incluyen; condensación y evaporación, cristalización y disolución, etc.

Un equilibrio dinámico ocurre en un sistema químico cuando la reacción directa y la reacción inversa se desarrollan a la misma velocidad.

Answer:

true?

Explanation:

Answer:

It's b

Explanation:

I had the same exact question

Among hydrogen bonds, dipole forces, dispersion forces, and ionic bonds, the weakest bond is: A. hydrogen bonds.

A chemical bond is defined as the forces of attraction that are existing between ions, crystals, atoms or molecules and they are mainly responsible for the formation of chemical compounds.

Hence, a chemical bond refers to a force holding atoms together and binding ions, crystals, or molecules together, in order to form a chemical compound.

Typically, there are three main types of chemical bonds and these are:

Hydrogen bond can be defined as a weak chemical bond existing between a partially positively charged hydrogen atom and an electronegative chemical atom.

A hydrogen bond has the strongest intermolecular force of attractions, but it is weaker than an ionic bond or covalent bond.

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The generic equation is M(OH)2 (s) + 2HCl (aq) → 2H2O (l) + MCl2 (aq), the molar mass of the unknown metal hydroxide is 121.4 g/mol and the identity of the metal is strontium (Sr).

The generic equation for the reaction between an alkaline earth metal hydroxide and hydrochloric acid is:

M(OH)2 (s) + 2HCl (aq) → 2H2O (l) + MCl2 (aq)

From the balanced equation, we can see that the stoichiometry of the reaction is 1:2 between the metal hydroxide and the hydrochloric acid. This means that for every mole of metal hydroxide reacted, 2 moles of hydrochloric acid are required.

To find the molar mass of the unknown metal hydroxide, we first need to calculate the number of moles of hydrochloric acid used in the titration:

Number of moles of HCl = 1.008 M × 0.01700 L = 0.01714 mol

Since 2 moles of HCl react with 1 mole of the metal hydroxide, the number of moles of metal hydroxide in the sample is:

Number of moles of metal hydroxide = 0.01714 mol / 2 = 0.00857 mol

We can now calculate the molar mass of the unknown metal hydroxide by dividing the mass of the sample by the number of moles:

Molar mass of metal hydroxide = 1.042 g / 0.00857 mol = 121.4 g/mol

To identify the metal, we can compare the molar mass of the unknown metal hydroxide (121.4 g/mol) to the molar masses of known alkaline earth metal hydroxides. The possible metals are beryllium, magnesium, calcium, strontium, and barium.

Beryllium hydroxide (Be(OH)2) has a molar mass of 43.03 g/mol, which is much lower than the molar mass of the unknown metal hydroxide. Magnesium hydroxide (Mg(OH)2) has a molar mass of 58.32 g/mol, which is also lower than the unknown metal hydroxide. Calcium hydroxide (Ca(OH)2) has a molar mass of 74.09 g/mol, which is still lower than the unknown metal hydroxide. Strontium hydroxide (Sr(OH)2) has a molar mass of 121.63 g/mol, which is very close to the molar mass of the unknown metal hydroxide. Finally, barium hydroxide (Ba(OH)2) has a molar mass of 171.34 g/mol, which is higher than the molar mass of the unknown metal hydroxide.

Based on the molar mass, the identity of the unknown metal is most likely strontium (Sr).

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The percent sugar concentration in orange soda is approximately 13.24%.

The volume of orange soda is given as 355 mL and its density is given as 1.043 g/mL. According to the nutrition label, there are 49 g of sugar in a 355 mL serving of orange soda.Using the density, we can convert the 355 mL volume into grams as follows:Volume = 355 mL; Density = 1.043 g/mL; Mass = ?To convert mL to g we need to multiply the volume with the density. Thus,Mass = Volume x Density= 355 x 1.043= 369.965 gThus, the mass of a 355 mL serving of orange soda is approximately 369.965 g.Next, we can calculate the percentage of sugar in the beverage as follows:Percent sugar concentration = (Mass of sugar / Total mass of beverage) x 100%Percent sugar concentration = (49 g / 369.965 g) x 100%Percent sugar concentration = 0.1324 x 100%Percent sugar concentration = 13.24%Therefore, the percent sugar concentration in orange soda is approximately 13.24%.

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Before its activity is lowered to 16.0 mci, it will take 47 days. A medical supply store buys a radioactive isotope sample with a 172.0-mci sample. The term "radioisotope" refers to an element's radioactive form.

which consists of atoms with unstable nuclei that undergo radioactive decay to stable forms, producing distinctive alpha, beta, or gamma radiation. Radioisotopes are an element's radioactive isotopes. They are the atoms with unstable neutron-proton combinations or excess energy in their nuclei. During those processes, the radionuclide is said to experience radioactive decay, albeit the surplus energy may be put to use in any number of ways. one of two or more atoms with a nuclear makeup that has a different amount of neutrons than protons but the same number of protons overall.

t = - ln(R/Ro)/lamda

t = -14 (ln(16/172)/ln2

t = 47 days.

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Answer:

A. Coccolithophores

Explanation:

Coccolithophores are organisms that are single-celled, and secret calcium carbonate plates. They produce calcium carbonate plates that is referred to as coccoliths.

These organisms absorb carbon dioxide during the production of their food. After its death, the calcium carbonate can be collected from the remains. Therefore causing an increase generally in the carbon deposits.

Answer:

A. Coccolithophores

Explanation:

Coccolithophores Create a calcium carbonate plating that protects the cell's surface. This action is called spherical coating.

Answer:

carbondioxe and zinc as solid

Answer:

This took forever T-T

Explanation:

1. The condition of the soil has a big impact on the environment. Good soil helps plants grow, supports different kinds of life, and prevents erosion. It also keeps nutrients in balance and affects the quality of water and air. If the soil is unhealthy or polluted, it can harm plants, animals, and the overall ecosystem.

2. The dodo bird is an example of a species that no longer exists. It used to live on an island called Mauritius. Sadly, people hunted the dodo bird for food and destroyed its habitat. They also introduced other animals that harmed the dodo bird's population. Because of these reasons, the dodo bird became extinct. This affected the environment because the dodo bird played a role in spreading seeds and helping plants grow.

3. The Sumatran orangutan is a species in danger of disappearing. Its biggest threats are losing its home due to forests being cut down for palm oil, illegal hunting, and being taken as pets. People are working to protect the orangutans by preserving their habitat, rescuing and rehabilitating them, and educating communities about their importance.

4. Central Park in New York City is a natural area created in 1857. It was made for people to enjoy nature in the middle of the city. People can do many outdoor activities there like walking, picnicking, and playing sports. The park is also home to various birds and animals, which adds to the city's biodiversity.

5. When a certain environment, like a forest or a desert, is damaged or in danger, it has a big impact on the whole ecosystem. Many different plants and animals depend on each other in these environments. If something harms or destroys their homes, it can lead to the loss of species, disruption of food chains, and less diversity. It can also affect important processes like water and carbon cycles, and even influence the climate. People who rely on these environments for resources and livelihoods are also affected. That's why it's important to protect and take care of these natural areas.

Answer:

its carbon

Explanation:

iron oxide + carbon = iron + carbon dioxide

as coke(mainly carbon) is a raw material gone into a blast furnace displaces iron.

Explanation:

Freezing point depression:

It's colligative property and it describes that when we add a solute to a solvent the freezing point of the solution goes down. The formula that describes this property is:

ΔTf = i * Kf * m

Where ΔTf is the freezing point depression, i is the Van't Hoff factor, Kf is the constant and m is the molality of the solution.

Molality is expressed as the moles of solute divided by the mass of solvent in kg.

molality = moles of solute/kg of solvent

According to the problem we are dilluting the solution adding 100 g of water. That means that the molality of the solution will decrease (we are dividing by a greater number). And if we look at the formula of the freezing point depression we will see that if the molality decreases the freezing point depression decreases. So, the freezing point of the solution will increase.

Boiling point elevation:

When we add a solute to a solvent the boiling point of the solution will be elevated.

ΔTb = i * Kb * m

Where ΔTb is the boiling point elevation, i is the Van't Hoff factor, Kb is the constant and m is the molality of the solution.

If we are dilluting the solution adding 100 g of water, the molality of the solution will decrease. If the molality decreases the boiling point elevation decreases. So, the boiling point of the solution will decrease.

Answer: The freezing point goes up or increases. The boiling point goes down or decreases.

The octet rule is applicable to both ionic and covalent bonding. The appropriate responses to the above question are -

B. Carbon with 4 valence electrons can satisfy the octet rule by sharing one electron with four different hydrogen atoms, each with 1 valence electron.

D. Chlorine with 7 valence electrons can satisfy the octet rule by gaining one electron from a lithium atom with only 1 valence electron.

The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a full outer shell of 8 electrons (or 2 electrons for hydrogen).

Option A is incorrect because it suggests that the carbon atom gains one electron from each of the four hydrogen atoms, which would result in the carbon atom having 8 electrons in its outer shell, violating the octet rule.

Option C is incorrect because it suggests that the chlorine atom shares one electron with the lithium atom, which would result in the chlorine atom having only 7 electrons in its outer shell, also violating the octet rule.

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Answer and Explanation:

The working-energy theorem defines work as the energy change brought on by the velocity change. The environment has acted on the object and it increases the energy of the object. When an object's velocity decreases, the object has worked on the world, and the object's energy decreases.

Unless the displacement is in the reverse direction and the force applied, then the work performed is negative. If the displacement is in the same direction and the force applied, then the work performed is positive.

Answer:

Work is the change in energy brought about by a change in velocity.  

When the velocity of an object increases, the environment has done work on the object and the energy of that object is increased.  

When the velocity of an object decreases, the object has done work on the environment and the energy of the object is decreased.

Explanation:

Answer:

True and false at the same time

Explanation:

It is true that Earth is heaven for life but It's also hell for life because people suffer a lot and so does the Earth. Earth is a hell for life because of all the bullying, criticism, racism, sexism, and homophobic people. Life is a great thing to enjoy but with all the negative things that happened and keep happening in the world, it's a living hell for a life. The only good things are that you can explore and do things you never thought of doing before and you are ale=ways surrounded by people who love you and appreciate you for who you are but it's a 5-50 chance of you getting an opportunity like that.

I'm not a negative person it's just the ways that things are. I hope this answers your question!

Have a nice day! UwU

Answer:

Explanation:

Hope It Helps!!!!

Answer:

See belwo

Explanation:

First it becomes a compressed gas.... further pressure will cause it to condense into a liquid.

This molecule violates the octet rule because xenon, the central atom, has 8 valence electrons surrounding it (6 from the fluorine atoms and 2 from its own), which is less than the typical octet of 8 electrons. The correct answer is b. F-Xe-F.

This is known as an expanded octet. O-C1-O and all other non-halogen compounds typically follow the octet rule. Therefore, the answer is not c. both of these, and it is not d. none of these.

The core atom, xenon, has 8 valence electrons surrounding it (6 from the fluorine atoms and 2 from its own), which is less than the normal octet of 8 electrons. As a result, this molecule breaks the octet rule. It's called an expanded octet. All non-halogen compounds generally adhere to the octet rule, including O-C1-O. Therefore, neither c. both of these nor d. none of these are the correct answers.

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The volume of the balloon outside the aircraft would be approximately 2037 mL.

We can solve this problem using the combined gas law, which relates the pressure, volume, and temperature of a gas. The combined gas law states that:

(P₁ × V₁) / T₁ = (P₂ × V₂) / T₂

where P1 and P2 are the initial and final pressures, V₁ and V₂ are the initial and final volumes, and T₁ and T₂ are the initial and final temperatures.

We can use this formula to solve for V₂, the final volume of the balloon outside the aircraft:

(0.78 atm × 700 mL) / T = (0.27 atm × V₂) / T

0.78 atm × 700 mL = 0.27 atm × V₂

V2 = (0.78 atm × 700 mL) / 0.27 atm

V2 ≈ 2037 mL

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