how many pounds of gold are present in 1 cubic mile of seawater?

Air filters are devices designed to remove impurities and particles from the air, improving its quality and making it healthier to breathe. While air filters can help remove certain contaminants, such as dust, pollen, and pet dander, they do not specifically filter out carbon dioxide (CO2).

Carbon dioxide is a natural component of the air we exhale, and its concentration in the atmosphere is regulated through natural processes, such as photosynthesis by plants. The removal of carbon dioxide from the air typically occurs through the natural carbon cycle, where plants absorb CO2 during photosynthesis and release oxygen.

If you are looking to reduce the carbon dioxide levels indoors, the most effective method is to ensure proper ventilation in the space. This can be achieved by opening windows or using mechanical ventilation systems to bring in fresh outdoor air and remove stale air. Additionally, increasing the number of plants indoors can help absorb carbon dioxide and release oxygen through photosynthesis.

It's important to note that while air filters can improve indoor air quality by removing various pollutants, they are not designed to specifically target or remove carbon dioxide.

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The cube of gold will have the greatest mass of 77.2 g.

The correct answer is B.

The cube that will have the greatest mass is determined from the density of the cubes using the formula below:

For brass: density = 8.9 g/cm³, volume = 4 cm³

mass = 8.9 g/cm³ x 4 cm³

mass = 35.6 g

For gold: density = about 19.3 g/cm³, volume = 4 cm³

mass = (about 19.3 g/cm³) x 4 cm³

mass = about 77.2 g

For iron: density = 7.8 g/cm³, volume = 4 cm³

mass = 7.8 g/cm³ x 4 cm³

mass = 31.2 g

For lead: density = about 11.3 g/cm³, volume = 4 cm³

mass = (about 11.3 g/cm³) x 4 cm³

mass = about 45.2 g

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Answer:

Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move

Explanation:

Answer:

25 possibly

Explanation:

I'm not too sure about this, but sodium oxide is Na2O, 2 sodium and 1 oxygen, so 12.5g * 2 is 25

If someone else comes up with a more convincing argument listen to them

The percent yield of carbon disulfide is 37.5% if the reaction of 43.7 g of carbon produces 34.8 g of carbon disulfide.

To calculate the percent yield of carbon disulfide (CS₂), we need to compare the actual yield of CS₂ obtained from the reaction to the theoretical yield that would be obtained if all of the carbon reacted to form CS₂. The percent yield is then calculated using the following formula;

Percent yield =(actual yield/theoretical yield) x 100%

First, we need to calculate the theoretical yield of CS₂ based on the amount of carbon used in the reaction. Balanced chemical equation for the reaction is;

C + 2S → CS₂

From this equation, we can see that the molar ratio between carbon and CS₂ is 1:1. Therefore, the number of moles of CS₂ that can be produced from 43.7 g of carbon is;

moles of CS₂ = moles of C = mass of C / molar mass of C

= 43.7 g / 12.01 g/mol

= 3.637 mol

Since the molar ratio between carbon and CS₂ is 1:1, the theoretical

yield of CS₂ would be 3.637 mol.

Next, we need to calculate the actual yield of CS₂ obtained from the reaction, which is given as 34.8 g.

Now we can use the formula above to calculate the percent yield;

Percent yield =(actual yield/theoretical yield) x 100%

= (34.8 g / (3.637 mol x 76.14 g/mol)) x 100%

= 37.5%

Therefore, the percent yield of CS₂ is 37.5%.

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Answer:

Explanation:

It's water vapor. There is enough heat present to get the water to boil but not enough to break it into its chemical components (oxygen and hydrogen), so the answer is D.

Answer:

hola no ablo inglés porfavor

Answer:

6626 g

Explanation:

Given that:

Density of water = 1.00 g/ml, volume of water = 42800 ml.

Since density = mass/ volume

mass of water = volume of water * density of water = 42800 ml * 1 g/ml = 42800 g

Initial temperature of water = 22°C and final temperature of water = 45°C.

specific heat capacity for water = 4.184 J/g°C

ΔT water = 45 - 22 = 23°C

For iron:

mass = m,  

specific heat capacity for iron  = 0.444 J/g°C

Initial temperature of iron = 1445°C and final temperature of water = 45°C.

ΔT iron = 45 - 1445 = -1400°C

Quantity of heat (Q) to raised the temperature of a body is given as:

Q = mCΔT

The quantity of heat required to raise the temperature of water is equal to the temperature loss by the iron.

Q water (gain) + Q iron (loss) = 0

Q water = - Q iron

42800 g ×  4.184 J/g°C × 23°C = -m × 0.444 J/g°C × -1400°C

m = 4118729.6/621.6

m = 6626 g

Answer:; 66 g is about 3/2 the value of the molar mass of CO2. It is reasonable that the sample contains 3/2 (1.5) mol.

Explanation:

Answer:

A

Explanation:

bc inorganic compoud refers to all compound that do not contain carbons.

Answer:

here's the answer hope it helps

Answer:

Five molecules of nitrogen and eight molecules of sulfur

Explanation:

The weight of each stopper can vary based on the material, size, and manufacturing process used, so it is not possible to determine the number of rubber stoppers needed without more information.

Weight is a measure of the force of gravity on an object and is typically measured in units of Newtons (N), pounds (lb), or kilograms (kg).

Average weight, on the other hand, refers to the sum of the weights of a group of objects divided by the number of objects in the group. It provides an estimate of the typical or central value of the weights in the group. The units of average weight are the same as the units used to measure weight.

The number of rubber stoppers needed to contain the same number of stoppers as there are corks in 1.0 kg of corks would depend on the average weight of each type of stopper.

The weight of each stopper can vary based on the material, size, and manufacturing process used, so it is not possible to determine the number of rubber stoppers needed without more information.

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A virtual lab on rates of reaction can be an excellent way to learn about the factors that influence the speed of chemical reactions.

In such a lab, you might be asked to observe the effects of changing variables such as temperature, concentration, and surface area on the rate of a given chemical reaction.
1. Rates of reaction: This refers to the speed at which reactants are converted into products in a chemical reaction. It can be affected by factors such as temperature, concentration, surface area, and catalyst presence.
2. Virtual lab: A virtual lab is an online platform where you can conduct experiments and simulate real-life scenarios in a safe and controlled environment, without the need for physical equipment or materials.
Now, to help you with your virtual lab, you should follow these general steps:
1. Understand the objective: Identify the goal of the experiment, such as determining the effect of a specific factor on reaction rates
2. Set up the experiment: Select the appropriate reactants, concentrations, and other conditions needed to perform the experiment in the virtual lab enzymes.
3. Conduct the experiment: Observe the virtual lab's interface to see how the reaction progresses and collect data, such as reaction time or product formation.
4. Analyze the results: Compare the collected data to identify trends or patterns, and draw conclusions about how the factors investigated impact the reaction rate.
5. Repeat as needed: Perform additional experiments to test different conditions and validate your findings.

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The complete question is

Describe rates of reaction in virtual lab?

Answer:

V₂ = 1223.2 mL  

Explanation:

Given data:

Pressure of gas = 820.4 mmHg

Initial volume of gas = 900.0 mL

Initial temperature = 25.0°C (25+273=298K)

Final temperature = 132.0°C (132.0 +273 = 405 K)

Final volume = ?

Solution:

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 900.0 mL × 405 K / 298 k

V₂ = 364500 mL.K / 298 K

V₂ = 1223.2 mL  

The molarity of the solution prepared by dissolving 2.0 g of NaOH in water to make a total solution of 250 mL is 0.2 M.

To calculate the molarity of a solution, we need to know the amount of solute (in moles) and the volume of the solution (in liters).

First, we need to convert the mass of NaOH (2.0 g) to moles. We can do this by dividing the mass by the molar mass of NaOH:

2.0 g NaOH / (40.00 g/mol NaOH) = 0.05 mol NaOH

Next, we need to convert the volume of the solution from milliliters to liters:

250 mL = 0.250 L

Now we can calculate the molarity of the solution:

Molarity = moles of solute / liters of solution

Molarity = 0.05 mol NaOH / 0.250 L solution

Molarity = 0.2 M

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Answer:

D hydrogen bonding

Explanation:

Answer: the answer for this question is in the pic

Explanation:

Producers are consumed by consumers only to be decomposed by decomposers. This dead matter is used to feed producers to start the cycle again.

Answer:

Producers are consumed by consumers only to be decomposed by decomposers. This dead matter is used to feed producers to start the cycle

To make 500 mL of 0.762 M solution of FeCl₃, the weight of FeCl₃ that should be taken will be 61.91 g.  

The molarity of a solution is calculated by the formula:

Molarity = \(\frac{Number of moles of solute}{Volume of solvent}\)

That is, Number of moles of solute = Molarity × Volume of solvent

The given molarity is 0.762 M and the volume to be made is 500 mL which is 0.5 L. Substituting these values in the above equation, we get:

Number of moles of FeCl₃ = 0.762 × 0.5 = 0.381 mol

To find the weight of FeCl₃, we can use the formula for calculating number of moles by rearranging it. That is,

Weight of FeCl₃ = Number of moles × Molecular mass of FeCl₃

Molecular mass of FeCl₃ = 56 + (3×35.5) = 162.5 g/mol

Substituting in above equation,

Weight of FeCl₃ = 0.381 × 162.5 = 61.91 g

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The solubility of mercury(II) iodide (HgI₂) in pure water is determined by its Ksp value, which is 2.9 x 10⁻²⁹.

In a 3.0 M solution of NaI, assuming (HgI₄)₂₋is the only significant species, the solubility of HgI₂can be calculated using the Ksp and K values.

The solubility of HgI2 in pure water can be calculated using its solubility product constant (Ksp). The Ksp value for HgI₂ is given as 2.9 x 10⁻²⁹. Solubility product constant represents the equilibrium constant for the dissolution of a sparingly soluble salt. By solving the equilibrium expression for HgI₂, we can determine its solubility in pure water.

In a 3.0 M solution of NaI, assuming the formation of (HgI₄)₂₋ is the only significant Hg-containing species, the solubility of HgI2 can be calculated using the Ksp and K values. The K value given for(HgI₄)₂₋ - is 6.8 x 10²⁹. By setting up an equilibrium expression considering the dissociation of HgI₂ into (HgI₄)₂₋  ions, we can determine the solubility of HgI₂in the presence of the NaI solution.

These calculations involve using the principles of equilibrium and the relationship between concentrations of dissolved species and their equilibrium constants. Solubility is defined as the maximum amount of solute that can be dissolved in a given solvent under specific conditions. By applying the relevant equilibrium expressions and values, we can determine the solubility of HgI₂ in each situation.

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Answer:

2g

Explanation:

Answer:

\(\boxed {\tt 10.5 \ g/mL}\)

Explanation:

Density can be found by dividing the mass by the volume.

\(d=\frac{m}{v}\)

The mass is 42 grams.

Let's find the volume. The volume was found through water displacement, so we must subtract the final volume of the water with the bracelet (14 mL) and the starting volume of water (10 mL)

Now we know that:

\(m= 42 \ g\\v= 4 \ mL\)

Substitute the values into the formula.

\(d=\frac{42 \ g }{4 \ mL}\)

Divide.

\(d= 10.5 \ g/mL\)

The density of the silver is 10.5 grams per milliliter.

Answer:

endothermic change occurs

Explanation:

photosynthesis, is an endothermic reaction in which energy is absorbed from the surrounding.

hope this helps

If we mixed 3 moles of HBr with 2 moles of KOH in enough water to make 1 liter of solution, then the amount of KBr that would be formed would be 3 moles.

The balanced chemical equation for the reaction between HBr and KOH is:

HBr + KOH → KBr + H2O

In the given case, we have 3 moles of HBr and 2 moles of KOH

Their mole ratio = 1.5:1.

This means that for every 1.5 moles of HBr, we have 1 mole of KOH, which will be enough to react with all the HBr.

So, the amount of KBr formed would be 3 moles, which is the same as the amount of HBr that was added to the reaction.

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Refer to the attachment

The reactants are 2 NaCl + F2

Answer:

2 Answers. Most transition metals have 2 valence electrons. Valence electrons are the sum total of all the electrons in the highest energy level (principal quantum number n). Most transition metals have an electron configuration that is ns2(n−1)d , so those ns2 electrons are the valence electrons.

Explanation:

Answer:

Mass number

Explanation:

All atoms of the same element have the same number of protons, but some may have different numbers of neutrons, which would cause a different mass number

Answer:

The answer is mass number