List three organelles found in cells and describe their functions.

The rate of diffusion of butane gas at the same temperature is approximately 240 m/s.

The rate of diffusion of a gas is directly proportional to its velocity at a given temperature. Therefore, we can use the ratio of the velocities of neon and butane gases to estimate the rate of diffusion of butane gas.

The molar mass of neon is 20.18 g/mol, and the molar mass of butane is 58.12 g/mol. Since both gases are at the same temperature, their velocities are proportional to the square root of the ratio of their molar masses:

\(\sqrt{(20.18 g/mol / 58.12 g/mol) }\)≈ 0.534

Therefore, we can estimate that the rate of diffusion of butane gas is about 0.534 times the velocity of neon gas. Multiplying the velocity of neon gas by this ratio, we get:

449 m/s x 0.534 ≈ 240 m/s

So, we can estimate that the rate of diffusion of butane gas at the same temperature is approximately 240 m/s.

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Answer:

The correct answer is b) 4.17 g of sodium and 6.42 g of chlorine

Explanation:

According to the law of definite proportions a chemical compound is composed always by the same elements in the same proportions by mass. In this case, the proportion of the elements by mass will be 4.37 g of chlorine (Cl) per 2.84 g of sodium (Na):

4.37 Cl/2.84 g Na= 1.54

We can calculate the proportions of the results in order to see which is the correct:

a) 3.75 g Cl/4.17 g Na = 0.899

b) 6.42 g Cl/4.17 g Na = 1.539 ⇒ ≅1.54

c) 1.05 g Cl/4.17 g Na = 3.971

d) 12.1 g Cl/4.17 g Na = 2.901

The option in which the proportion Cl/Na is equal to 1.54 is option b

1.The specific heat is X J/(g °C),2.

The specific heat of rocks is X J/(g °C),

3.New compound can store X joules,

4.Energy is X joules,

7.The heat change of the reaction is X joules,

8.Final temperature is X °C.

To calculate the specific heat of the metal, we can use the formula Q = m * c * ΔT, where Q is the heat lost, m is the mass of the metal, c is the specific heat, and ΔT is the change in temperature. Rearranging the formula, we have c = Q / (m * ΔT). Plugging in the given values, we find the specific heat of the metal.

Similar to the previous question, we can use the formula Q = m * c * ΔT to calculate the specific heat of the rocks. Given the mass, heat lost, and temperature change, we can solve for c.

The energy stored in the new compound can be calculated using the formula Q = m * c * ΔT, where Q is the energy, m is the mass of the compound, c is the specific heat, and ΔT is the change in temperature. Plugging in the given values, we can determine the energy stored in the compound.

Using the formula Q = m * c * ΔT, we can calculate the energy required to heat the tin. Given the mass, specific heat, and temperature change, we can solve for Q.

It would take X kilograms of lead.

To calculate the mass of lead needed, we can use the formula Q = m * c * ΔT. Rearranging the formula, we find m = Q / (c * ΔT). Plugging in the given values, we can determine the mass of lead required.

The heat change of the superfood is X joules.

The heat change can be calculated using the formula Q = m * c * ΔT, where Q is the heat change, m is the mass of the superfood, c is the specific heat of water, and ΔT is the change in temperature of the water. By plugging in the given values, we can find the heat change of the superfood.

To calculate the heat change of the reaction, we use the formula Q = m * c * ΔT, where Q is the heat change, m is the mass of water, c is the specific heat of water, and ΔT is the change in temperature of the water. The sign of Q indicates whether the reaction is endothermic (positive) or exothermic (negative).

To find the final temperature of the water, we can use the formula Q = m * c * ΔT. Rearranging the formula, we have ΔT = Q / (m * c). Plugging in the given values for heat change, mass of water, and specific heat, we can solve for ΔT and find the final temperature of the water. The sign of the heat change (Q) determines if the reaction is endothermic (positive) or exothermic (negative).

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The questions touch on the concept of specific heat and heat transfer. By using the specific heat formula (q = mcΔT) and appropriately adjusting it to the problem at hand, one can calculate the specific heat, the stored energy, the heat changes and the final temperature in each case.

The questions asked are in the realm of physics, particularly focusing on the concept of specific heat, heat transfer and the heat changes in various compounds and chemicals. To answer these questions, we can make use of the formula for specific heat: q = mcΔT where 'q' is the heat transfer, 'm' represents the mass, 'c' is the specific heat and 'ΔT' depicts the change in temperature.

1. Using the formula, the specific heat of the unknown metal can be calculated by rearranging the formula to c = q / (m * ΔT) = 220.6 J / (15g * 24.5°C).

2. For the rocks, you would calculate c = 145 J / (200g * 8°C).

3. The energy storage of the medical pad's compound can be determined by rearranging the formula to find q = (6kg * 6.76 J/g°C * 12°C).

4. The energy required to heat the tin can be calculated using q = (200g * 0.117 J/g°C * 45°C).

5. The mass of lead can be determined by rearranging the formula: m = q / (c * ΔT) = 3000 J / (0.129 * 60°C).

6 & 7. The heat change of the superfood and reaction in the calorimeter can also be determined using this formula.

8. The final temperature of the water can be determined by q = mcΔT announcing ΔT = q / (mc) = -323 J / (5g * 4.184 J/g°C).

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2.395 grams of lithium hydroxide are needed to completely neutralize 500 ml of a 0.2 m solution of HCl.

A chemical reaction between an acid and a base that results in a more neutral solution is known as a neutralization reaction. The strength of the acid and base used in the reaction determines the pH of the solution.

For the neutralization reaction: LiOH + HCl -> H2O + NaCl

To find the number of moles of HCl present in the solution:

0.2M * 0.5L = 0.1 moles of HCl

As the reaction is a neutralization reaction, the number of moles of HCl will be equal to the number of moles of LiOH used in the reaction.

Now, we know the number of moles of LiOH used in the reaction is 0.1 moles.

To find the mass of LiOH used in the reaction, we can use the formula: mass = moles * molar mass

The molar mass of LiOH is 23.95 g/mol.

mass = 0.1 moles * 23.95 g/mol = 2.395 g of LiOH.

Therefore, 2.395 grams of lithium hydroxide are needed to completely neutralize 500 ml of a 0.2 m solution of HCl.

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Answer:

Color. I thinkkk.

Phyiscal properties are defined as properties that can be measured or observed without changing the chemical nature of the substance.

Some examples of phsyical properties are:

- Color

- Density

- Volume

- Mass

- Boiling or Melting Points

Answer:

19.20 g. Explanation: ∵ mass % = [mass of solute/mass of solution] x 100

Answer:

Velocity = 12 km/h

Explanation:

Velocity can be defined as the division between distance traveled and the time it took for that distance to be traveled:

With the above information in mind, we can calculate the velocity of the bicycle:

Thus the velocity of the bicycle is 12 kilometers per hour.

Answer: It is believed the major reason for the decline in amphibian species is death through disease.

Explanation:

The major reason for the decline in amphibian species is climate change.

Amphibians are organisms that can live on land and in water. They are

usually found around moist areas because they need water bodies to cool

off in order for their survival.

Climate change is characterized by an increase in temperature which

doesn't favor them as they lose more water which thereby threatens survival

and leads to their decline in the ecosystem.

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After boiling the mixture of iron salt, water

iron, and salt it will remain and water will be evaporated

Answer:

Its a

Explanation:

i took the quiz

The sentence that is inappropriate in an informational piece of writing with a formal tone is "People find Shakespeare's Pericles, Prince of Tyre boring and annoying because it's possible that he didn't even write the entire play." The correct option is A.

In academic or professional settings, a formal writing tone is common. This tone emphasizes thoroughness and directness while remaining respectful.

It emphasizes facts and grammatical correctness and uses full words rather than contractions.

The use of standard English, more complex sentence structures, the infrequent use of personal pronouns, and the absence of colloquial or slang terms characterize formal language.

In informal language, nonstandard English forms, colloquial vocabulary, and typically shorter sentence structures are permitted.

"People find Shakespeare's Pericles, Prince of Tyre boring and annoying because it's possible that he didn't even write the entire play," is an inappropriate sentence in a formal informational piece of writing.

Thus, the correct option is A.

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To get a countable plate, you need to dilute the sample. A 1:10 or 1:100 dilution will likely yield a countable plate.

When a sample has a high concentration of bacteria, it can be challenging to get a countable plate as the number of colonies can be too numerous to count accurately. To address this issue, the sample needs to be diluted. A 1:10 or 1:100 dilution is commonly used to reduce the bacterial concentration to a countable range.

To calculate the dilution factor, you divide the original concentration by the dilution factor used. For example, a 1:10 dilution would be 10^-1, and a 1:100 dilution would be 10^-2. To achieve a concentration between 30-300 cfu/ml, you need to calculate the volume of the diluted sample needed to plate out.

For instance, a 1:100 dilution of the original sample would result in a concentration of 2.79 x 10^4 cfu/ml. To plate out between 30-300 colonies, you would need to plate between 0.1 to 1 ml of the diluted sample.

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We need to understand the reaction that the glucose meter is measuring. Reaction 2 likely involves the oxidation of glucose to produce electrons, which are then measured by the glucose meter.

We are given that 0.67 μmol of electrons were measured. To find the mass of glucose present in the sample, we can use stoichiometry to relate the number of electrons produced to the amount of glucose consumed.

The balanced reaction for the oxidation of glucose is:

C6H12O6 + 6O2 → 6CO2 + 6H2O + energy

We can see that for every glucose molecule oxidized, 6 electrons are produced. Therefore, the number of moles of glucose present in the sample is:

0.67 μmol / 6 = 0.112 μmol

To convert this to mass, we can use the molar mass of glucose:

0.112 μmol x 180 μg/μmol = 20.16 μg

Therefore, there were approximately 20.16 μg of glucose present in the sample.

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Answer:

B.

Explanation:

The root mean square speed of Cl₂ gas under the same conditions will be 391.8 m/s if He(g) has an average KE of 5450 J/mol under certain conditions.

We know that the RMS speed of the gas is expressed as

Vrms = \(\sqrt{\frac{3RT}{M} }\)

here, T: absolute temperature of the gas

M: molar mass of the gas

R: universal gas constant

so average molar kinetic energy of the gas

E = 1/2MV²rms = (3/2)RT

Now, given that average kinetic energy for He gas

KE = 5450 J/mol

we know that molar KE is independent of the nature of the gas. It only depends on temperature as the ideal conditions are concerned. So both He and Cl₂ have same KE = 5450 J/mol

So for Cl₂

atomic mass, M = 35.5g/mol or 35.5 x 10⁻³kg/mol

(1/2MV²rms ) for Cl₂ = 5450

V² = \(\frac{2x5450}{2x35.5x10^{-3}}\)

or V = 391.8 m/s

Therefore, the root mean square speed of Cl₂ gas under the same conditions will be 391.8 m/s if He(g) has an average KE of 5450 J/mol under certain conditions.

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The molarity of the solution if 1.600 moles of a solute are dissolved in enough water to make 400.0 ml is 4M

Before we calculate the molarity we should know that molarity is a unit of concentration measuring the number of moles of a solute per liter of solution.

The molarity can be calculated as follows:

as we know, 400 mL = 0.4L

Molarity = moles/volume

molarity = 1.600 moles/ 0.4L

Molarity = 4M

so,The molarity of the solution if 1.600 moles of a solute are dissolved in enough water to make 400.0 ml is 4M

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Answer:the second largest one

Explanation:

both weels are pushing at it

The given reaction of silver nitrate with sodium chloride is an example of double displacement reaction where, two groups replaces each other. Thus, option D is correct.

Displacement reaction is a type of reaction in which a species from a reactant is displaced by other species or group from reagent. There are single displacement reaction as well as double displacement reaction.

In single displacement reaction, only one group is displaced by another group from the second reactant. Whereas in double displacement reaction, two groups are displaced each other between two reactants.

In the reaction between silver nitrate and sodium chloride, the nitrate group and chloride group interchange between the metals silver and sodium as written in the reaction. Hence, it is a double displacement reaction.

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Your question is incomplete, but your complete question probably was:

Jose and Sue were investigating the formation of precipitates in chemistry lab. They

mixed a silver nitrate solution with a sodium chloride solution and immediately a

white solid appeared in the bottom of the test tube. This white solid is a precipitate

of silver chloride. The reaction is represented with the equation:

AgNO3(aq) + NaCl (aq) → AgCl (s) + NaNO3(aq)

The equation represents a ________________ reaction.

A) synthesis

B) decomposition

C) neutralization

D) double replacement

Recrystalization will occur.The solution may become too diluted for crystals to form if you add too much solvent. Impurities will be captured by a hastily formed crystal's lattice. The crystals that result will also be smaller.

Recrystallization is a physical process used to separate compounds based on how soluble they are. Heating the material to dissolve the compound with impurities in a mixture of a suitable solvent completes the procedure. We can remove the desired chemical or contaminants from the mixture using this method.

The solution may become too diluted for crystals to form if you add too much solvent. The flask needs to be gently cooled, first at room temperature and then in cold water. Impurities will be captured by a hastily formed crystal's lattice. The resulting crystals will also be smaller.

The three main types of recrystallization are;

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The energy of the light emitted by 0.50 moles of photons with a wavelength of 671 nm is approximately 8.92 * 10^4 Joules.

Let's understand this in detail:

To find the energy of light emitted by 0.50 moles of photons with a wavelength of 671 nm, we can follow these steps:

1. Convert the wavelength to meters: 671 nm * (1 meter / 1,000,000,000 nm) = 6.71 * 10^-7 meters.

2. Calculate the energy of one photon using the Planck's equation: E = hf, where E is energy, h is Planck's constant (6.626 * 10^-34 Js), and f is frequency.

3. To find the frequency, we use the speed of light (c) equation: c = λf, where λ is the wavelength. Rearrange the equation to find the frequency: f = c / λ.

4. Substitute the values and calculate the frequency: f = (3 * 10^8 m/s) / (6.71 * 10^-7 m) = 4.47 * 10^14 Hz.

5. Now, calculate the energy of one photon: E = (6.626 * 10^-34 Js) * (4.47 * 10^14 Hz) = 2.96 * 10^-19 J.

6. Finally, find the energy of 0.50 moles of photons: Energy = (0.50 moles) * (6.022 * 10^23 photons/mole) * (2.96 * 10^-19 J/photon) = 8.92 * 10^4 J.

So, the energy of the light emitted by 0.50 moles of photons with a wavelength of 671 nm is approximately 8.92 * 10^4 Joules.

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The energy of the light emitted by 0.50 moles of photons with a wavelength of 671 nm is approximately 8.93 x \(10^4\) J.

To find the energy of the light emitted by 0.50 moles of photons with a wavelength of 671 nm, we can use the following steps:
1. Convert the wavelength to meters: 671 nm = 671 x \(10^{(-9)}\) m
2. Calculate the energy of a single photon using Planck's equation: E = h * c / λ, where E is the energy, h is the Planck's constant (6.626 x \(10^{(-34)}\) Js), c is the speed of light (3.0 x \(10^8\) m/s), and λ is the wavelength in meters.
3. Calculate the total energy of 0.50 moles of photons by multiplying the energy of a single photon by Avogadro's number (6.022 x \(10^{(23)}\) particles/mole) and the number of moles (0.50).
Step-by-step calculation:
1. λ = 671 nm = 671 x \(10^{(-9)}\) m
2. E (single photon) = (6.626 x \(10^{(-34)}\) Js) * (3.0 x \(10^8\) m/s) / (671 x \(10^{(-9)}\) m) = 2.967 x \(10^{(-19)}\) J
3. Total energy = E (single photon) * 0.50 moles * (6.022 x \(10^{(23)}\) particles/mole) = (2.967 x \(10^{(-19)}\) J) * 0.50 * (6.022 x \(10^{(23)}\)) = 8.93 x \(10^4\) J
So, the energy of the light emitted by 0.50 moles of photons with a wavelength of 671 nm is approximately 8.93 x 10^4\(10^4\) J.

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Answer:

1) petroleum, mixture, not found on periodic table

2) hydrogen and helium, mixture, contains "and"

3) iron sulphide, compound, ends with "ide"

4) carbon dioxide, compound, ends with "ide"

5) salt water, mixture, not found on periodic table

6) milk and sugar, mixture, contains "and"

7) silver nitrate, compound, ends with "ate"

8) sodium carbonate, compound, ends with "ate"

9) carbon electrode, mixture, not found on periodic table

10) astatine, element, found on periodic table

11) argon, element, found on periodic table

12) oxidane, compound, contains "ane"

13) iron and sulphur, mixture, contains "and"

14) methane, compound, contains "ane"

Explanation:

i) Metals: A and D

Non-metals: B and C

ii) The valency of A is 1. This is because A has one valence electron, and elements in Group 1 (such as A) typically have a valency of 1 as they tend to lose that single valence electron to achieve a stable electron configuration.

iii)

A: Sodium (Na) - Symbol: Na

B: Chlorine (Cl) - Symbol: Cl

C: Oxygen (O) - Symbol: O

D: Calcium (Ca) - Symbol: Ca

iv) The compound formed by the combination of A and B: Sodium Chloride (NaCl) The compound formed by the combination of C and B: Oxygen Chloride (OCl2)

v) Element D (Calcium) is more active than element A (Sodium). This is because elements in Group 2 (such as D) tend to lose two valence electrons, which requires less energy compared to losing only one valence electron (as in the case of A).

vi) The elements that can lose the valence electron to become stable are A (Sodium) and D (Calcium).

Metals: A, B, C, D; Non-metals: None. Elementsii) The valency of A is 1 because it has only one valence electron.iii) The name and symbol of all the elements are:A - Sodium (Na)B - Chlorine (Cl)C - Argon (Ar)D - Calcium (Ca)iv) The molecular formula of the compound formed by the combination of A and B is NaCl. The molecular formula of the compound formed by the combination of C and B is BCl2.

v) A is more active than D because A is a metal and metals are more active than non-metals. A tends to lose electrons more easily than vi) The elements which can lose the valence electron to become stable are metals.

i) Metals: A and D Non-metals: B and C ii) The valency of A is 1. This is because A has one valence electron, and elements in Group 1 (such as A) typically have a valency of 1 as they tend to lose that single valence electron to achieve a stable electron configuration. iii) A: Sodium (Na) - Symbol: Na B: Chlorine (Cl) - Symbol: Cl C: Oxygen (O) - Symbol: O D: Calcium (Ca) - Symbol: Ca

iv) The compound formed by the combination of A and B: Sodium Chloride (NaCl) The compound formed by the combination of C and B: Oxygen Chloride (OCl2) v) Element D (Calcium) is more active than element A (Sodium). This is because elements in Group 2 (such as D) tend to lose two valence electrons, which requires less energy compared to losing only one valence electron (as in the case of A). vi) The elements that can lose the valence electron to become stable are A (Sodium) and D (Calcium).

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The temperature of the bromine reaction mixture during reflux, it typically depends on the boiling point of the solvent being used.

For example, if the solvent is chloroform, the reflux temperature would be around 61-62°C. If the solvent is carbon tetrachloride, the reflux temperature would be around 76-77°C.

As for the condenser, a water condenser is typically used during reflux to prevent the loss of solvent and/or reagents due to evaporation. Air condensation is not likely to be sufficient, especially for reactions that require longer reflux times.

Regarding the bromination of alkenes, the substituents do remain on opposite sides of the molecule after the reaction, resulting in a trans product. The absolute configurations of the carbons depend on the starting configuration of the alkene. For example, if the starting alkene is (Z)-2-butene, the product of bromination would be (2R,3S)-2,3-dibromobutane, as shown in the following diagram:

   H     Br

   |     |

H -- C=C -- C -- H

   |     |

   Br    H

Note that the stereochemistry of the product is determined by the anti-addition mechanism of bromination, which results in the formation of a meso compound with two chiral centers.

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Oxygen and nitrogen from the atmosphere can be used as feedstock to produce chemicals such as ammonia, nitric acid, and sulfuric acid.

The components of the atmosphere, such as nitrogen and oxygen, can be used to produce important chemicals through industrial processes such as the Haber-Bosch process for ammonia synthesis and the production of nitric acid. Nitrogen and oxygen can also be used as oxidizers in combustion processes to produce energy and heat, such as in the burning of fossil fuels.

Additionally, carbon dioxide from the atmosphere can be used as a feedstock for the production of chemicals such as methanol and formic acid through processes like carbon capture and utilization. The use of atmospheric components in chemical production can help to reduce reliance on non-renewable resources and support the development of sustainable manufacturing processes.

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L-citrulline is an amino acid that is commonly used as a supplement for erectile dysfunction (ED). The time it takes for L-citrulline to work can vary depending on several factors, including the individual's metabolism and the dosage taken.

Typically, it is recommended to take L-citrulline supplements daily for several weeks to see noticeable improvements in ED symptoms. However, some individuals may experience positive effects sooner, within a few days or even hours after taking the supplement.

To achieve the best results, it is important to follow the recommended dosage instructions provided by the manufacturer or a healthcare professional. It is also worth noting that L-citrulline may be more effective when combined with other supplements or medications, such as L-arginine or PDE5 inhibitors like Viagra.

As with any supplement or treatment, it is advisable to consult with a healthcare professional before starting L-citrulline or making any changes to your current treatment plan for ED. They can provide personalized advice based on your specific needs and health condition.

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The raffinose and the stachyose are the examples of the type of complex carbohydrate is the oligosaccharides.

The oligosaccharide, are the  carbohydrate of from of the three to six units of the simple sugars that is monosaccharides sugar.  The classification of the oligosaccharides depends on the number of the  sugar units they made up of is as follows  :

In the trisaccharide the  three monosaccharides linked together. In the tetrasaccharides the four monosaccharides that is  2 galactose units, one unit of fructose and one glucose unit. In the pentasaccharides  five monosaccharides. The hexasaccharide  are made up of the six sugar units.

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The formula mass of Cu2O is approximately 143.09 u.

The formula mass of a compound is calculated by summing the atomic masses of all the atoms in its chemical formula.

Molecular mass is the sum of the atomic masses of all the atoms in a molecule, while formula mass is the sum of the atomic masses of all the atoms in a formula unit of an ionic compound.

The formula mass of Cu2O is calculated by adding the atomic masses of two copper atoms and one oxygen atom, which gives:

Formula mass of Cu2O = (2 x atomic mass of Cu) + (1 x atomic mass of O)

= (2 x 63.55 u) + (1 x 15.99 u)

= 127.10 u + 15.99 u

= 143.09 u

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Answer:

properties

Explanation:

i think it is properties because it fits the space