What organelles can only be seen in detail using an electron
microscope?

Air would be the most likely candidate for the can with the greatest change in temperature

Recall that the change in the heat capacity would be related to the heat capacity.

Since it has a relatively low specific heat capacity compared to the other options listed (iron filings, water, and sand). However, it's important to note that this is a simplified explanation and there may be other factors at play depending on the specific conditions of the experiment.

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To determine the number of moles of chromium in 88.0 g of Cr ore that is 76.4% pure, we need to consider the molar mass of chromium and the percentage purity of the ore.

Chromite is a crystalline mineral composed primarily of iron(II) oxide and chromium(III) oxide compounds. It can be represented by the chemical formula of FeCr₂O₄. It is an oxide mineral belonging to the spinel group.

Calculate the molar mass of chromium (Cr):

The molar mass of chromium (Cr) is 52.00 g/mol.

Determine the amount of pure chromium in the ore:

If the ore is 76.4% pure, it means that 76.4% of the 88.0 g is pure chromium.

Pure chromium = 76.4% of 88.0 g = 0.764 * 88.0 g = 67.33 g

Convert the mass of pure chromium to moles:

Moles of chromium = Mass of pure chromium / Molar mass of chromium

Moles of chromium = 67.33 g / 52.00 g/mol ≈ 1.293 moles

Therefore, there are approximately 1.293 moles of chromium in 88.0 g of Cr ore that is 76.4% pure.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

The type of radiation that breaks apart diatomic oxygen to form a free radical oxygen is ionizing radiation. This type of radiation has enough energy to remove an electron from an atom or molecule, which then leads to the formation of free radicals such as oxygen. These free radicals are highly reactive and can cause damage to cells and DNA if they are not neutralized by antioxidants in the body.

The type of radiation that breaks apart diatomic oxygen (O2) to form a free radical oxygen (O) is ultraviolet (UV) radiation. Here's a step-by-step explanation:

1. Ultraviolet radiation, a form of electromagnetic radiation, reaches the Earth's atmosphere from the sun.
2. When diatomic oxygen molecules (O2) in the atmosphere absorb UV radiation, they gain energy.
3. The absorbed energy causes the diatomic oxygen molecules to break apart into two individual oxygen atoms.
4. These oxygen atoms are now free radicals, which are highly reactive due to having unpaired electrons.

So, ultraviolet radiation is responsible for breaking apart diatomic oxygen to form free radical oxygen atoms.

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The central atom in KrF2 violates the octet rule.

KrF2 consists of one Kr atom and two F atoms. According to the Lewis structure, Kr shares 2 of its valence electrons with two F atoms to complete its octet, while each F atom contributes 3 non-bonding electrons to the Kr atom.

Kr has a total of 10 valence electrons, which is more than eight electrons. As a result, Kr is known to violate the octet rule.

Therefore, KrF2 is the compound with the central atom that violates the octet rule.

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Answer:

mass and distance between them

The statement "Classification of an acid or a base is useful when predicting how a chemical will react with another chemical" is true.\

Knowing whether a chemical is an acid or a base can help predict how it will react with other chemicals. Acids tend to donate protons (H+) while bases tend to accept protons, and these tendencies influence their reactions.

For example, acids react with bases to form salts and water, while bases react with acids to form salts and water as well. Additionally, acids can react with metals to form metal salts and hydrogen gas, while bases can react with certain organic compounds to form salts and water.

By understanding the properties and behavior of acids and bases, chemists can predict and control chemical reactions, which is important for many fields such as drug development, materials science, and environmental science.

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Answer:NH

+

4

:

0.272

M

SO

2

−

4

:

0.136

M

Explanation:

We can solve this problem using some molarity calculations:

molarity

=

mol solute

L soln

We should convert the given mass of

(NH

4

)

2

SO

4

to moles using its molar mass (calculated to be

132.14

g/mol

):

10.8

g (NH

4

)

2

SO

4

⎛

⎝

1

l

mol (NH

4

)

2

SO

4

132.14

g (NH

4

)

2

SO

4

⎞

⎠

=

0.0817

mol (NH

4

)

2

SO

4

This is the quantity present in

100

mL soln

, so let's calculate the molarity of the solution (converting volume to liters):

molarity

=

0.0817

l

mol (NH

4

)

2

SO

4

0.100

l

L soln

=

0.817

M

10

mL

of this solution is added to

50

mL H

2

O

, which makes a

60

-

mL

total solution.

We can now use the dilution equation

M

1

V

1

=

M

2

V

2

to find the molality of the new,

60

-

mL

solution:

(

0.0817

M

)

(

10

l

mL

)

=

(

M

2

)

(

60

l

mL

)

M

2

=

(

0.817

M

)

(

10

mL

)

60

mL

=

0.136

M

This means that there are

0.136

moles of

(NH

4

)

2

SO

4

per liter of solution.

Let's recognize that

1

mol (NH

4

)

2

SO

4

contains

2

mol NH

+

4

1

mol SO

2

−

4

The concentrations of each ion is thus

(

2

)

(

0.136

M

)

=

0.272

M

NH

+

4

(

1

)

(

0.136

M

)

=

0.136

M

SO

2

−

4

Explanation:

Answer:

Chemistry course is intended for students who did not take chemistry in high school or who struggled with high school chemistry.

Explanation:

In order to select the solvent that will most effectively dissolve NaCl, we must consider the properties of the compound. NaCl is a salt, which means that it is ionic and has a high melting and boiling point. Therefore, we need a solvent that is capable of breaking the ionic bonds in NaCl and dissolving it.

Water is a common solvent that is highly effective at dissolving NaCl. This is because water molecules are polar, which means that they have a partial positive and negative charge. These charges are able to attract and surround the Na+ and Cl- ions, breaking the ionic bonds and dissolving the compound. Additionally, water is a highly abundant and accessible solvent, making it a practical choice for dissolving NaCl. Overall, water is the best solvent for dissolving NaCl due to its polar nature and accessibility.

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Answer:

to the tooth

Explanation:

Its also a way to cook your pasta because you cook it just long enough so that it is neither hard nor soft but is firm and slightly chewy.

But if we're talking a literal translation than it would be to the tooth.

The mean mass of the given sample is 39.12g

mass of first sample = 39.75g

mass of second sample = 38.91g

mass of third sample = 37.66g

mass of fourth sample = 39.75g

mass of fifth sample= 39.55g

Total mass of the sample = 39.75 g + 38.91 g+ 37.66 +39.75 g + 39.55 g = 195.62 g

Number of samples = 5

Therefore mean mass of the samples = 39.12g

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Answer:

The correct answer is

Explanation:

hope this helps u!!

Answer:

uhm

Explanation:

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

D

Explanation:

not all atoms would be the same size. As for they vary scaleing from left to right in the periodic table.

Answer:

Chemical equation: AgNo3 + LiBr = AgBr + LiNO3

Explanation:

Answer:

Chemical equation: AgNO3 + LiBr -> AgBr + LiNO3

Complete Ionic equation: Ag + NO3 + Li + Br -> AgBr + Li + NO3

Net Ionic equation: Ag + Br -> AgBr

Explanation:

You start out with the chemical equation. We know that to get to the complete ionic equation we have to follow the solubility guidelines for common ionic compounds. In there, we can see that NO3 is soluble with no exceptions, which means every NO3 in this equation should be separated from the compound (this brings us to Ag + NO3 + LiBr -> AgBr + Li + NO3). Next we should separate Br, but be careufl because in the solubility guidelines it states that an exception to this being soluble would be if Br was next to Ag, Hg, and Pb. Since our second Br is next to an Ag, our equation will look like Ag + NO3 + Li + Br -> AgBr + Li + NO3. To find the net ionic equation all we're going to need to find are the substances that cancel each other out on both sides of the equation (aka the spectator ions). Our spectator ions in this case are Li and NO3. After we cancel those out, our net ionic equation is Ag + Br -> AgBr.

The molecular mass​ : 81.72 g/mol

In general, the gas equation can be written  

\(\large {\boxed {\bold {PV = nRT}}}\)

where  

P = pressure, atm , N/m²

V = volume, liter  

n = number of moles  

R = gas constant = 0.082 l.atm / mol K (P= atm, v= liter),or 8,314 J/mol K (P=Pa or N/m2, v= m³)

T = temperature, Kelvin  

P = 760 mmHg=1 atm

T = 300 K

V = 0.3 L

Number of moles :

\(\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1\times 0.3}{0.082\times 300}\\\\n=0.0122\)

The molecular mass (MW) :

\(\tt MW=\dfrac{mass}{n}\\\\MW=\dfrac{0.997~g}{0.0122}\\\\MW=81.72~g/mol\)

1. Glyceraldehyde 3-phosphate enters the Krebs cycle as part of the glycolysis pathway.

2.The complete oxidation of glycerol results in the production of 15 ATP molecules. This includes the ATP generated from glycolysis, the Krebs cycle, and the electron transport chain.

3.This is because each round of beta-oxidation of a 6-carbon fatty acid generates 4 ATP molecules (one FADH2 yields 2 ATP, and one NADH yields 3 ATP), and two rounds of beta-oxidation are required for complete oxidation of a 6-carbon fatty acid.

1. Glycerol is a three-carbon molecule with the chemical formula C3H8O3. It can enter the Krebs cycle after undergoing several reactions. Here are the reactions involved:

Glycerol → Glycerol 3-phosphate

Glycerol 3-phosphate → Dihydroxyacetone phosphate

Dihydroxyacetone phosphate → Glyceraldehyde 3-phosphate

Glyceraldehyde 3-phosphate enters the Krebs cycle as part of the glycolysis pathway.

2. The complete oxidation of glycerol results in the production of 15 ATP molecules. This includes the ATP generated from glycolysis, the Krebs cycle, and the electron transport chain.

3. The complete oxidation of a fully saturated 6-carbon fatty acid (such as stearic acid) to CO2 and H2O produces a total of 146 ATP molecules. This is because each round of beta-oxidation of a 6-carbon fatty acid generates 4 ATP molecules (one FADH2 yields 2 ATP, and one NADH yields 3 ATP), and two rounds of beta-oxidation are required for complete oxidation of a 6-carbon fatty acid.

In summary, the net ATP produced from the complete oxidation of glycerol to CO2 and H2O is 15 ATP molecules. For a fully saturated 6-carbon fatty acid, the net ATP produced from its complete oxidation is 146 ATP molecules. These calculations take into account the ATP generated from glycolysis, the Krebs cycle, and the electron transport chain.

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1. Glycerol undergoes reactions to enter the Krebs cycle in the glycolysis pathway.

2. The complete oxidation of glycerol results in the production of 15 ATP molecules.

3. The net ATP produced from the complete oxidation of a fully saturated 6-carbon fatty acid is 146 ATP molecules.

1. Glycerol,   a three-carbon molecule,undergoes a series of reactions to enter the Krebs cycle as part of glycolysis, contributing toATP production. This metabolic pathway allows glycerol to be utilized for energy generation in cells.

2. The complete   oxidation of glycerol, encompassing glycolysis, the Krebs cycle, and the electron transport chain,results in the production of 15 ATP molecules. These processes efficiently extract energy from glycerol and convert it into ATP, the primary   energy currency of cells.

3. The complete   oxidation of a fully saturated 6-carbon fatty acid, such as stearic acid, involves beta-oxidation,yielding a net of 146 ATP molecules. This   energy production arises from the successive breakdown of fatty acid molecules,generating ATP through various steps, including the electron transport chain. The oxidation of fatty acids plays a crucial role in meeting cellular energy demands.

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Answer: Your teacher is correct, although yes not every element has a charge of 0.

Explanation:

Atoms are electrically neutral because they contain equal quantities of positively charged protons and negatively charged electrons. Electrons and protons have equal but opposite charges, so the result is no net charge.

Answer:

nitrogen

Explanation:

as the group number increases, the atomic radius decreases

The minimum de Broglie wavelength of the ejected electrons = 0.66 nm

The De Broglie wavelength is a wavelength manifested in all of the objects in quantum mechanics which determines the opportunity density of locating the item at a given point of the configuration area. The de Broglie wavelength of a particle is inversely proportional to its momentum.

Frequency = 2. 41×10^15 Hz

Work function =  6. 53 eV = 6. 53 * 1.6 * 10^-19 = 10.45 * 10^-19

ENERGY = Work function +  MAX KINETIC ENERGY

K max = 6.626 * 10^-34 * 2. 41×10^15 - 10.45 * 10^-19

K max = 15.96 *10^-19 - 10.45 * 10^-19

K max = 5.51 * 10^-19

Now, minimum de Broglie wavelength of ejected electron

       λmin= \(\frac{h}{\sqrt{2mKmax} }\)

               = \(\frac{6.626 * 10^-34}{2 * 9.1 * 10^-31*6.25 *10^-19}\)

             =  0.66 nm  answer

Hence, The minimum de Broglie wavelength of the ejected electrons = 0.66 nm

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Answer:

Bacteria has 1 cell and An Animal has multiple cells.

Explanation:

Bacteria is a cell its self. While An Animal, It has multiple cells that create multiple tissues, and those tissues create multiple organs, those organs make up an organ system. After the Organ System, it's an organism.

Organism = Animal, Human, Ect.

Meanwhile, Bacteria is made up ONE CELL (bacteria it's self is 1 cell)

So the answer is "Bacteria has 1 cell and An Animal has multiple cells."

I hope this helped!! <33

The best evidence that the moon has been extensively heated is the lack of volatiles.

The following are the characteristics of the Moon

:Mass of the moon.Lack of iron core.

Oxygen isotopes like the Earth.

Lack of volatiles.

Volatiles are materials with low boiling points that exist in solid or liquid form at the Earth's surface. Water and carbon dioxide are two examples of volatile materials. The lack of volatiles on the moon is a strong indication that the moon was subjected to high temperatures. It also indicates that volatiles have been expelled from the moon's surface due to the loss of gas molecules that occurred as a result of the heat. As a result, the absence of volatiles is the best evidence that the Moon has been extensively heated.

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When you get into a car that has been sitting in the sun for a while, there are several noticeable things that may occur. Here are some of the common observations:

1. Heat: One of the first things you'll notice is the intense heat inside the car. This is because the sun's rays have been absorbed by the car's exterior and trapped inside, creating a greenhouse effect. The temperature inside the car can become significantly higher than the temperature outside.

2. Hot Surfaces: The surfaces inside the car, such as the seats, dashboard, steering wheel, and metal parts, can become extremely hot to the touch. This is due to the absorption of heat from the sun. It's important to be cautious and avoid direct contact with these hot surfaces to prevent burns or discomfort.

3. Odor: The interior of the car may have a distinct smell when it has been sitting in the sun for a while. This is often referred to as the "hot car smell." It is caused by the combination of materials, such as upholstery, plastic, and carpet, heating up and emitting a specific odor.

4. Fading or Discoloration: Prolonged exposure to sunlight can cause fading or discoloration of materials inside the car. For example, the upholstery, dashboard, and other surfaces may gradually lose their original color and become faded or discolored over time.

5. Glare: When you first enter a car that has been sitting in the sun, you may notice a strong glare from the sunlight reflecting off the windshield and other glass surfaces. This glare can make it difficult to see clearly and may require the use of sunglasses or adjusting the sun visors to minimize the brightness.

It's important to note that these observations may vary depending on factors such as the intensity of the sunlight, the duration the car has been in the sun, and the materials used in the car's interior. Regular maintenance and taking precautions, such as using sunshades or parking in shaded areas, can help minimize some of these effects.

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Answer:

B.

F.

Explanation: