approximately how long will it take for atmospheric co2 concentrations to return to preindustrial levels after we stop emitting carbon (without geoengineering)?

At standard temperature and pressure (STP), there are 7.695 moles of Cl2 in 90 L of gas.

The number of moles of a gas in a container can be calculated using the Ideal Gas Law, PV = nRT. At standard temperature and pressure (STP), the temperature is 0°C (273.15 K) and the pressure is 1 atm.

The Ideal Gas Law equation is:

PV = nRT

Where:

P is pressure (in atm)

V is volume (in L)

n is the number of moles of gas

R is the universal gas constant (0.0821 L-atm/mol-K)

T is temperature (in Kelvin)

At STP, we can plug in the values:

P = 1 atm

V = 90 L

T = 273.15 K

R = 0.0821 L-atm/mol-K

Solving for n:

n = (P * V) / (R * T)

n = (1 atm * 90 L) / (0.0821 L-atm/mol-K * 273.15 K)

n = (90) / (0.0821 * 273.15)

n = 7.695 moles of Cl2

Therefore, at standard temperature and pressure (STP), there are 7.695 moles of Cl2 in 90 L of gas. Rounded to the nearest hundredth place, there are 7.70 moles of Cl2 in 90 L of gas at STP.

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The ion that is likely present in the solution when a deep-blue color appears upon adding NH3(aq) is Cu2+.

When NH3(aq) is added to an aqueous solution, a deep-blue color usually appears due to the formation of a complex ion. The ion that is present in the solution depends on the metal ion present in the solution.

In the case of copper (Cu2+), adding NH3(aq) to an aqueous solution containing Cu2+ ions forms a deep-blue complex ion known as [Cu(NH3)4]2+.This complex ion is responsible for the observed blue color.

On the other hand, adding NH3(aq) to an aqueous solution containing Fe2+ ions forms a pale green complex ion known as [Fe(NH3)6]2+. This complex ion is not responsible for a deep-blue color.

Adding NH3(aq) to an aqueous solution containing Fe3+ ions forms a reddish-brown complex ion known as [Fe(NH3)6]3+. This complex ion is also not responsible for a deep-blue color.The ion Se is not known to form a deep-blue complex ion with NH3(aq).

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Answer:

11.7 g

Explanation:

The freezing point of a solution is lowered by the addition of solute particles. In order to have the same effect on freezing point as the CuCl2 solution, 11.7g of NaCL must be added.

Answer:

Aquatic plants that live underwater have leaves with large air pockets inside that allow the plant to absorb oxygen from the water.

Answer:

. Plant adaptations are changes that help a plant species survive in its environment. Aquatic plants that live underwater have leaves with large air pockets inside that allow the plant to absorb oxygen from the water. The leaves of aquatic plants are also very soft to allow the plant to move with the wave.

Explanation:

Answer: 0.135 M

Explanation:

Stoichiometry is omitted reactant. Reactants are the substances that participate in a chemical reaction. The process by which atoms, the fundamental building blocks of matter.

Rearrange themselves to form new combinations is described by a chemical reaction. Reactants - Reactants are the substances that participate in a chemical reaction. Products - Substances formed as a result of the formation of new bonds in a chemical reaction are referred to as products. As an example: H2 and O2 are reactants in this case because they participate in the chemical reaction. Reactants are the starting materials and appear on the left side of the equation. The products of the reaction are written on the right-hand side of the equation.

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Answer: 2. they are 4 and 8

Explanation: I took the exam. I hope I helped :)

Answer:

evaporation means the state of the water went from liquid to gas which is a physical change. the sugar is still in the beaker which means its chemical properties did not change.

Explanation:

Answer:1,01

Explanation:

Answer:

Ca2+ is cation

Explanation:

Because cation contain positive charge.

A small group of atoms does not collapse into a clump because thermal energy quickly disperses them.

Thermal energy refers to the kinetic energy of the atoms due to their random motion and vibrations. In a system with a relatively small number of atoms, thermal energy plays a significant role in preventing the atoms from collapsing into a clump.

Kinetic energy is the energy possessed by an object due to its motion. It depends on the mass of the object and its velocity, representing the work required to accelerate or decelerate it.

The random motions and collisions between the atoms cause them to disperse rather than clump together. This phenomenon is commonly observed in gases, where individual atoms or molecules remain dispersed rather than aggregating into a clump or solid structure.

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The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Answer:

Most nuclear fuels contain heavy fissile actinide elements that are capable of undergoing and sustaining nuclear fission. The three most relevant fissile isotopes are uranium-233, uranium-235 and plutonium-239

Explanation:

Answer:

7.8286×10^21 particles

Explanation:

atomic mass of potassium = 39.1 u

1 u = 1 g/mol

Potassium (K) = 39.1 g/mol × 2 =  78.2 g/mol

Oxygen (O)     =     16 g/mol × 1  =    16  g/mol

K₂O = 94.2 g/mol

1.224 g / 94.2 g/mol = .013 moles

Avogadro's number = 6.022×10²³

particles = moles x Avogadro's number

particles = .013 moles x 6.022×10^23

particles = 7.8286×10^21 particles

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socratic

Answer:

The list of elements from increasing electronegativity: Calcium <  magnesium < chlorine < argon < boron.

Explanation:

In the periodic table if you move from left to right there would be an increase in the electronegativity of the elements. If you move from the bottom to the top of the groups in the periodic table the electronegativity increases and if u move to the bottom from down its decreases.

Calcium is in the 2nd group below magnesium so calcium is the least electronegative among given elements then magnesium and then chlorine as it is top of magnesium then argon, as it is right to the chlorine, and boron has the most electronegativity as it is above rest of the elements.

Answer:

1. 1500km

2. 400km

Explanation:

1. 750km x 2

=1500km

2. 200km x 2

=400km

The mole fraction of the KOH is 0.025.

We know that the mole fraction is the ratio of the moles to the total number of moles.

Thus;

Number of moles of KOH =  56g/56 g/mol = 1 mol

Number of moles of water = 700.0g/18 g/mol = 39 moles

Now;

Mole fraction of KOH = 1 mol/1 mol + 39 moles = 1/40 = 0.025

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Answer:

pick it up with tongs

Explanation:

Answer:

Pseudoscience

Explanation:

Predicting the future based solely on the position of the planets is an example of pseudoscience.

Pseudoscience is a body of knowledge that is not based on the scientific method but on some unverifiable/unprovable claims.

Predictions about the future can only be valid if it is based on the scientific method, not just about the position of the planet. The scientific method involves observation, hypothesis formulation, testing of the hypothesis through repeatable experiments, and arriving at conclusion.

Any other statement or belief that is not based on these procedures is said to be pseudoscientific.

Answer:

The answer to your question is pseudoscience.

Explanation:

I took the module 1 exam and got it right, yesterday.

Answer:

See Explanation Note ...

Explanation:

Depending on amount added, Anhydrous CaCl₂ when dissolved in water solvent can become hot enough to blister ones skin when touched. On the cold side, Ammonium Nitrate will cool an aqueous solution enough to generate condensate frost on the outside of a glass beaker. I'm sure there are more examples but these two came to mind.

Answer:

KOH

Explanation:

I took the test

The student's claim of 4.64 × 10^24 molecules is incorrect, and the correct number of molecules of ammonium acetate used in the reaction is 6.022 × 10^22 molecules.

The mistake the student made is assuming that the molar mass of ammonium acetate directly corresponds to the number of molecules. However, the molar mass of a substance represents the mass of one mole of that substance, not the number of molecules.

To determine the correct number of molecules of ammonium acetate used in the reaction, we need to use Avogadro's number, which relates the number of particles (atoms, molecules, etc.) in one mole of a substance.

Avogadro's number is approximately 6.022 × 10^23 particles/mol. Given that the student used 0.100 mol of ammonium acetate, we can calculate the correct number of molecules by multiplying the number of moles by Avogadro's number:

Number of molecules = (0.100 mol) × (6.022 × 10^23 molecules/mol)

Performing the calculation, we find that the correct number of molecules of ammonium acetate used in the reaction is 6.022 × 10^22 molecules.

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The United States governmental agency that has primary responsibility for security issues in air transportation is the Transportation Security Administration (TSA).

The Transportation Security Administration (TSA) is a U.S. government agency that was created in response to the 9/11 attacks. Its primary responsibility is to ensure the security of air travel, both for passengers and cargo. The TSA is responsible for implementing and enforcing security measures at airports across the country.

This includes screening passengers and their belongings, conducting random checks, and employing various technologies to detect and prevent potential threats.

The agency also works closely with other domestic and international entities to share intelligence and coordinate security efforts. Overall, the TSA plays a crucial role in maintaining the safety and security of air transportation within the United States.

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Answer:

The human heart is an organ that pumps blood throughout the body via the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes.

Explanation:

Hope this helped! Good luck on whatever it is you're working on!

Answer:

The heart is a cardiac muscle,which is specialized to pump blood powerfully and efficiently throughout our entire life time.

Explanation:

I really hope this helps.

The property of matter that is conserved in chemical reactions and shown by balanced equations is known as the Law of Conservation of Mass. According to this law, mass can neither be created nor destroyed in a chemical reaction; it can only be transformed from one form to another.For instance, when two substances are combined, they react and form a new substance.

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Answer:

0.88g

Explanation:

The reaction equation:

         2NaI  + Cl₂   →    2NaCl  + I₂

Given parameters:

Mass of Sodium iodide = 2.29g

Unknown:

Mass of NaCl = ?

Solution:

To solve this problem, we work from the known to the unknown.

First find the number of NaI from the mass given;

   Number of moles  = \(\frac{mass}{molar mass}\)  

          Molar mass of NaI  = 23 + 126.9  = 149.9g/mol

 Now insert the parameters and solve;

     Number of moles  = \(\frac{2.29}{149.9}\)   = 0.015mol

So;

 From the balanced reaction equation;

            2 moles of NaI produced 2 moles of NaCl

          0.015mole of NaI will produce 0.015mole of NaCl

Therefore;

      Mass  = number of moles x molar mass

      Molar mass of NaCl = 23 + 35.5  = 58.5g/mol

Now;

      Mass of NaCl  = 0.015 x 58.5  = 0.88g

Answer:

Newton's first law of motion is explained in the below statements

What is Newton's first law of motion?

Newton's first law asserts that if a body is at rest or travelling at a constant speed in a straight line, it will remain at rest or continue to move in a straight path at a constant speed until acted on by a force.

Explanation:

Some examples of Newton's first law are:

1. A rock at rest: Unless pushed by nature or by another force, a rock sitting on the ground will remain there for thousands of years. It will not be dispersed in various locations.

2. The sudden application of breaks in a vehicle: When a driver suddenly uses the brakes, we tend to move forward. The vehicle comes to a halt as a result of the brakes. However, we are moving due to inertia. That is why seat belts are essential for road safety. 

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Answer:

38,640g

Explanation:

Since the density is in g/mL, we have to convert 2.000 liters to mil-liters to be able to successfully use the formula of M=V*D. Convert liters to mil-liters and you should have 2000mL in which you can plug into the equation of M= 2000mL*19.32g/mL, mL cancels, and you're left with 38,640g (here the significant figures are already in check).

The reactions are in order which includes combustion reaction, Hydration reaction, oxidation reaction, and displacement reaction.

a) A combustion reaction is a chemical reaction between a fuel and an oxidant where heat is released. The combustion reaction example is given below. It is a balanced chemical reaction.

2C₃H₆(g) + 9O₂(g) --------> 6CO₂(g) + 6H₂O(g)

b. A hydration reaction is a chemical reaction in which a molecule of water is added to another molecule. Here Aluminum oxide is added to water to form aluminum hydroxide.

4Al₂O3(s) + 6H₂O(l)------> 2Al(OH)3(s)

c. When a metal reacts with oxygen, the metal forms an oxide. Oxide is a compound of metal and oxygen. Here lithium metal reacts with oxygen to form lithium oxide.

2Li(s) + O₂(g)-----> Li₂O(s)

d. A displacement reaction is one in which a more reactive element displaces a less reactive element from a compound. Here Zinc is more reactive than silver, so silver was displaced to form Zinc Nitrate.

Zn(s) + 2AgNO₃(aq) -----> 2Ag(s) + Zn(NO₃)₂(aq)

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