what is the magnitude of its temperature change |δt|= 18.7 k in degrees celsius?

To determine which peak on the GC chromatogram corresponds to the compound that had the least interaction with the column, we need to look for the peak with the shortest retention time. The retention time is the time it takes for a compound to travel through the column and elute out of the detector. The shorter the retention time, the less interaction the compound had with the column. Therefore, the peak on the GC chromatogram that corresponds to the compound that had the least interaction with the column is the one with the shortest retention time.

Chromatography is a molecular separation technique based on differences in movement patterns between the mobile phase and the stationary phase to separate components in solution. Molecules dissolved in the mobile phase will pass through the column which is the stationary phase.

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Answer:

Because you don't want 2 different things mixing together unless their supposed to be mixed together

Explanation:

The hand cream used as a separating agent when the flubber was handled because it is not about 2 different things mixing together unless their supposed to be mixed together.

What is separating agent ?

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Carbon atoms weigh 12.01g/mol in a mole.

12 grams of pure carbon-12 contain exactly one mole's worth of atoms (C-12). 12g of C-12 is equal to 1 mole, or 6.022 10²³ atoms.

On Earth, a compound's molar mass, which is also known as its molecular weight, is just the total mass of its constituent elements. The amount of matter in a substance or an object is measured by its mass. The kilogram (kg) is the fundamental SI unit of mass, while lower masses can also be measured in grams (g).

A substance's mole is equivalent to 6.022 x 10²³ of that material (such as atoms, molecules, or ions). The term "Avogadro's number" or "Avogadro's constant" refers to the number 6.022 10²³ .

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When you apply a force to a rubber band, it changes shape and then returns to its previous shape when you remove the force.

It is solid in nature, but because to the elastic nature of the rubber band, it may change shape when force is applied. For modest applied forces, the stretching action of rubber bands follows Hooke's Law, F=k x.

The limit of force for which the rubber band obeys Hooke's law is determined by the band's physical parameters, such as cross-sectional area. The stronger the attraction, the longer it lasts. In other words, a greater force causes the rubber band to stretch further.

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Answer:

10

Explanation:

thats the max

The soda in a fridge has more thermal energy than the soda on the kitchen table.

Thermal energy is the total energy possessed by an object due to the motion of its particles. It is directly related to the temperature of the object. When a soda is placed in a fridge, it is exposed to a lower temperature environment. The fridge actively removes heat from the air inside, creating a cooler environment. As a result, the soda's temperature decreases. The decrease in temperature corresponds to a decrease in the average kinetic energy of the soda's particles, which directly affects its thermal energy.

On the other hand, a soda on the kitchen table is exposed to the surrounding room temperature. While the room temperature may vary depending on the location and climate, it is generally higher than the temperature inside a fridge. Consequently, the soda on the kitchen table has a higher temperature, which corresponds to a higher average kinetic energy of its particles and thus a higher thermal energy.

In summary, the soda in a fridge has more thermal energy than the soda on the kitchen table due to the lower temperature environment it is exposed to. The lower temperature corresponds to a decrease in the average kinetic energy of its particles and, consequently, a lower overall thermal energy.

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LEAST TO MOST POLAR- hexane,diethyl ether,acetone,n-propanol,water ,methanol

Considering the problem  we can say that the kids are compared to be more polar or smaller molecular weight compounds. The more polar compounds interact with silica more just as the kids bus stopped at every point and reached the destination late. Whereas, the adult bus is compared to be less polar compounds or high molecular weight which interacts less and reaches the destination faster.

Thus more polar compounds reaches the destination late whereas less polar compound reaches first.

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Answer:

Explanation:

The following equation describes the oxidation of ethanol to aceticacid by potassium permanganate:

3C2H5OH +4KMnO4-->3HC2H3O2 +4MnO2 + 4KOH + H2O

5.0 g of ethanol and an excess of aqueous KMnO4 arereacted, and 5.9 g HC2H3O2 result.What is the percent yield?

a. 100%

b. 91%

c. 67%

d. 30%

e. 5.9 g HC2H3O2 is impossible since it represcents more than a100% yield.

The percent yield of acetic acid is 91.9%

From the question,

We are to determine the percent yield of the acetic acid

To determine the percent yield of the acetic acid, we will calculate the theoretical yield first.

The balanced chemical equation for the reaction is

3C₂H₅OH + 4KMnO₄ → 3HC₂H₃O₂ + 4MnO₂ + 4KOH + H₂O

This means

3 moles of ethanol reacts with 4 moles of potassium permanganate to produce 3 moles of acetic acid

Now, we will determine the number of moles of ethanol that reacted

From the question

Mass of ethanol that reacted = 5.00 g

Molar mass of ethanol = 46.07 g/mol

Using the formula

\(Number\ of\ moles= \frac{Mass}{Molar\ mass}\)

∴ Number of moles of ethanol = \(\frac{5.00}{46.07}\)

Number of moles of ethanol that reacted = 0.10853 mole

Now,

From the balanced chemical equation,

3 moles of ethanol reacts with 4 moles of potassium permanganate to produce 3 moles of acetic acid

Then,

0.10853 mole of ethanol reacts with the excess potassium permanganate to produce 0.10853 mole of acetic acid

∴ 0.10853 mole of acetic acid will be produced

Now, for the mass of acetic acid that would be produced

From the formula

Mass = Number of moles × Molar mass

From the question

Molar mass of acetic acid = 60.05 g/mol

∴ Mass of acetic acid that will be produced = 0.10853 × 60.05

Mass of acetic acid that will be produced = 6.5172 g

This is the theoretical yield of acetic acid

Now, for the percent yield

\(Percent\ yield = \frac{Actual\ yield}{Theoretical\ yield} \times 100\%\)

From the question,

Actual yield = 5.99 g

∴ \(Percent\ yield = \frac{5.99}{6.5172} \times 100\%\)

\(Percent\ yield = \frac{599}{6.5172} \%\)

Percent yield = 91.9106 %

Percent yield ≅ 91.9%

Hence, the percent yield of acetic acid is 91.9%

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Answer:

we can use 100g of compounds as the basis.

Explanation:

✅Magnetic materials are always made of metal, but not all metals are magnetic. Iron is magnetic, so any metal with iron in it will be attracted to a magnet. Steel contains iron, so a steel paperclip will be attracted to a magnet too. Most other metals, for example aluminium, copper and gold, are NOT magnetic.

IamSugarBee

If I accidentally left my working stock in room temperature, there are a few steps that I would take in order to assess the damage and salvage the situation. First, I would check the expiration date of the stock to see if it was still viable before being exposed to room temperature. If it had expired, then there may not be much I could do to save it.

Assuming the stock was still viable, I would then inspect it for any signs of contamination or degradation.

If the stock had become contaminated or had started to degrade, then it would need to be discarded.
If the stock appeared to be still usable, I would then perform a series of tests to determine if it was still functional.

I would conduct a viability assay, such as a colony forming unit (CFU) assay or a growth curve analysis, to determine if the stock was still capable of growing and dividing.

If the stock was still functional, then I would use it for experiments as planned, but with the understanding that it may not perform as well as a freshly prepared batch.
To prevent this situation from happening in the future, I would take steps to label and store my stocks properly and to set reminders for myself to check on their status regularly.

It's always better to be safe than sorry when it comes to important reagents and stocks in the lab.

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Answer: When the neutral conducting sphere is touched (grounded), electrons move from the ground to the sphere to neutralize it. This means that electrons move "into the sphere from the ground (hand)." As a result, the sphere becomes negatively charged.

Since the positively charged balloon is still nearby, it will attract negative charges to its surface. Electrons from the sphere will move "out of the sphere into the balloon," leaving the sphere with a net positive charge.

Therefore, the correct answer is "out of the sphere into the balloon" for the movement of electrons in this scenario.

Electrons move from the ground through the sphere to the balloon in this situation. Here, the movement of electrons when a positively charged balloon is brought near a neutral conducting sphere and the sphere is grounded. In this scenario, electrons move from the ground through the sphere to the balloon.

Here's a step-by-step explanation:
Step:1. The positively charged balloon is brought near the neutral conducting sphere.
Step:2. This induces a charge separation in the sphere, with the side closest to the balloon becoming negatively charged and the side farthest from the balloon becoming positively charged.
Step:3. The sphere is then grounded (touched), allowing a pathway for the movement of electrons.
Step:4. Electrons from the ground flow into the sphere, neutralizing the positive charge on the far side of the sphere.
Step:5. The flow of electrons continues until the sphere is at the same potential as the ground, leaving the side of the sphere closest to the balloon negatively charged.
So, electrons move from the ground through the sphere to the balloon in this situation.

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Answer:

Explanation:

Although stochiometry is very scary loking math it is very easy and and fun to learn.

First Balance the chemical equation (Meaning there are equal amounts of elements at end and begining

Second Convert your units to mols

mols are what allows for stochiometry math to work to know how to find the mols takes practice and knowing when to write the math.

Then from there is just knowing how to go from grams to kg or g to mg and etc

Answer:

dont know how many

Explanation:.

The balanced chemical equation is:

0.5C7H16 + O2 → 0.5CO2 + H2O

For balancing the chemical equation C7H16 + O2 → CO2 + H2O, we can use linear algebraic techniques. We need to determine the coefficients that balance the number of atoms on both sides of the equation.

Let's denote the coefficients for C7H16, O2, CO2, and H2O as a, b, c, and d, respectively.

The balanced chemical equation can be written as:

aC7H16 + bO2 → cCO2 + dH2O

To balance the carbon (C) atoms, we have:

7a = c (Equation 1)

To balance the hydrogen (H) atoms, we have:

16a = 2d (Equation 2)

To balance the oxygen (O) atoms, we have:

2b = 2c + d (Equation 3)

We have three equations (Equations 1, 2, and 3) and four unknowns (a, b, c, d). To solve this system of equations, we can write it in matrix form and find the solution using linear algebraic techniques.

The augmented matrix for the system of equations is:

[ 7 0 -1 0 | 0 ]

[ 0 0 0 -2 | 0 ]

[ 0 -2 2 -1 | 0 ]

By performing row operations to row-reduce the augmented matrix, we can obtain the solution:

[ 1 0 -0.5 0 ]

[ 0 1 -1 -0.5 ]

[ 0 0 0 0 ]

The solution to the system of equations is:

a = 0.5

b = 1

c = 0.5

d = 1

Putting the values of a,b,c, and d we get the balanced chemical equation as:

0.5C7H16 + O2 → 0.5CO2 + H2O

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Invented by Bernard Launy and Jeremie Metz, flaws in the system in terms of energy inputs and outputs is the overbalanced wheel in which spokes are attached

Energy is the ability to do work to cause changes in matter

The overbalanced wheel perpetual motion machine is one of the most commonly proposed perpetual motion machine designed and wheel is designed to turn clockwise just after the weighted spoke reaches the top of the wheel and the spoke flip outward to the right exerting the force downward toward the ground and some energy will be lost from friction as the mechanism rub on the inner spoke and more energy will be lost when it transferred into sound and thermal energy

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Answer:

c

Explanation:

Answer:

3p6 3d4

Explanation:

3d will come after 3p => 3p 3d

p will hold maximum of 6 electrons while d will hold maximum of 10 electrons.

if there are 8 more electrons to 3p2, then 4 will fill 3p so it will become 3p6

then the other 4 will fill 3d to become 3d4

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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The question requires us to choose the best option to explain why bubbles rise faster from a warm can of soda than a cold can, based on the solubility of gases in liquids.

Adding heat to a solution composed of a liquid and a gas (i.e., increasing its temperature) provides thermal energy to the gas that makes it possible to overcome the forces that maintain molecules of solvent (liquid) and solute (gas) together. In this way, the molecules of solvent and solute tend to separate, therefore decreasing the solubility of the gas. Based on this, we can say that the solubility of gases in liquids increase with increasing temperature.

Therefore, the best option to answer the question is the first one, "gases become less soluble in liquids at higher temperatures".

To determine the quantity of CaCO3 required to make 100 mL of a 100 ppm Ca2+ solution, 2.777 mg of CaCO3 is required.


First, calculate the amount of Ca2+ ions required in 100 mL of solution:
(100 mL / 1000 mL) x 100 mg = 10 mg of Ca2+ ions

Next, determine the mass ratio of Ca2+ ions to CaCO3. The molecular weight of Ca2+ is 40.08 g/mol and that of CaCO3 is 100.09 g/mol. Therefore, the mass ratio is 40.08/100.09.

Finally, calculate the amount of CaCO3 required to obtain 10 mg of Ca2+ ions:
(10 mg Ca2+ ions) x (100.09 g CaCO3 / 40.08 g Ca2+) ≈ 2.777 mg of CaCO3

So, 2.777 mg of CaCO3 is required to make 100 mL of a 100 ppm Ca2+ solution.

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Answer:

b) Every experienced cooks at home tend not to use recipes, instead based entirely upon their knowledge of cooking technique.

Explanation:

This is because even the most experienced cooks might make a mistake, so having a recipe where they can follow is better than just use their knowledge. If his or her knowledge has a mistake it might create a big consequence.

A 3.5 L sample of carbon dioxide will have a mass of 7.0 grams.

To find the mass of a carbon dioxide sample, we can use the density formula:

Density = Mass / Volume

Rearranging the formula to solve for mass:

Mass = Density * Volume

Density of carbon dioxide = 2.0 g/L

Volume of the sample = 3.5 L

Substituting the values into the formula:

Mass = 2.0 g/L * 3.5 L

Mass = Density * Volume

Mass = 2.0 g/L * 3.5 L

Mass = 7.0 g

Therefore, a 3.5 L sample of carbon dioxide will have a mass of 7.0 grams.

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677mmHg

In answering this question, we use Dalton's law of partial pressures which states that in a mixture of two or more non-reacting gases, the total pressure  is equal to the sum of the partial pressures of the individual gases making up the mixture.

From the question, the gases are oxygen and water vapour.

Therefore the total pressure (\(P_T\)) is the sum of the partial pressure of oxygen (\(P_O\)) and the partial pressure of water vapour (\(P_{W}\))

\(P_T\) = \(P_O\) + \(P_{W}\)     -----------------(i)

\(P_T\) = 692.2mmHg

\(P_{W}\) = 14.5mmHg

Substitute these values into equation (i) as follows;

692.2 = \(P_O\) + 14.5

\(P_O\) = 692.2 - 14.5

\(P_O\) = 677.7

Therefore, the partial pressure of oxygen is 677mmHg

Answer:

Explanation:

????? i am having trouble according this

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer: Gravity is considered a universal force because it acts between any two masses anywhere in the universe.

Answer:

Gravity (from Latin gravitas 'weight'[1]), or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light[2]—are brought toward (or gravitate toward) one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.

A solute gets dissolved in something else. (solvent)

A solute is a substance which dissolves in something else, like a solution. As a result, a homogeneous mixture is formed. A solute can be a gas, solid or a liquid.

A solvent is a substance in which a solute happens to dissolve in order to  produce a homogenous mixture. Solvents can also exist as solids, liquids as well as gases.
For example, NaCl is a solute which dissolves in water, which is a solvent. The equation is as follows
NaCl (aq) + H2O (l) → NaOH (aq) + HCl (aq)
Hence, option A is the correct option.
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Answer:

Sel palisade terdapat di daun dan fungsi utamanya adalah penyerapan cahaya sehingga fotosintesis dapat berlangsung.

Explanation: