in a cryogenics (extreme cold) demonstration, a scientist takes a small, partially inflated balloon out of liquid nitrogen (at a very low temperature). As the balloon rests on the table, it begins to grow in size. explain this phenomenon.

Answer:

d. the ratio and size of the compound's ions

Explanation: The crystal structure of an ionic compound depends on the sizes of the cations and anions.  and  ratio of cations to anions.

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A developing B cell unable to generate a productive rearrangement on any of the four light-chain loci will undergo cell death or apoptosis.

During B cell development, the rearrangement of genes in the light-chain loci is crucial for the production of functional B cell receptors (BCRs). The light-chain loci contain several gene segments, including V (variable), J (joining), and C (constant) segments. it means that it is unable to produce a functional BCR. Without a functional BCR, the B cell cannot effectively recognize and bind to antigens.

In such cases, the B cell is typically eliminated through a process called apoptosis. Apoptosis is a programmed cell death mechanism that helps to remove cells that are unable to perform their intended functions or have potential harmful effects. In summary, a developing B cell that is unable to generate a productive rearrangement on any of the four light-chain loci will undergo cell death or apoptosis.

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Answer:

31.1°c

Explanation: PV=nRT

The new temperature is approximately 31.67°C. The volume change from 450 ml to 400 ml caused the temperature to decrease.

To find the new temperature, we can use Charles's Law, which states that the volume of a gas is directly proportional to its temperature when pressure and the amount of gas are constant.

The equation for Charles's Law is V₁/T₁ = V₂/T₂

Where V₁ and T₁ are the initial volume and temperature, respectively, and V₂ and T₂ are the final volume and temperature, respectively.

Given that V₁  = 450 ml, T₁ = 35°C, and V₂ = 400 ml, we can rearrange the equation to solve for T₂:

T₂ = ( V₂* T₁) / V₁

T₂ = (400 ml * 35°C) / 450 ml

T₂ ≈ 31.67°C

So, the new temperature is approximately 31.67°C. The volume change from 450 ml to 400 ml caused the temperature to decrease.

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Answer:

The information from Mariner 6 and Mariner 7

Explanation:

Because they had not been launched yet

Answer:

5.8667 ft/s

Explanation:

Answer:

See explanation

Explanation:

A carbohydrate is formed from carbon, hydrogen and oxygen. These three elements are combined in every carbohydrate.

Even though carbohydrates are composed of only these three atoms, the number of atoms of these elements in each carbohydrate as well as the spatial arrangement of these atoms in each carbohydrate is not the same.

This means that different carbohydrates contain different number of carbon, oxygen and hydrogen atoms which are arranged in different ways in space. This gives room for the existence of many different types of carbohydrates all consisting of carbon, hydrogen and oxygen atoms.

The information regarding the different carbohydrates that should be formed is explained below.

It should be created from carbon, hydrogen, and oxygen. It should be combined with every carbohydrate. Still, carbohydrates should be comprised of only these three atoms, so the no of atoms of these elements in every carbohydrate also the spatial arrangement of these atoms in every carbohydrate is not similar.

This represents that various carbohydrates contain distinct numbers of carbon, oxygen, and hydrogen atoms that are in different ways in space.

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The polymerization of amino acids into a protein is an example of a condensation reaction or dehydration synthesis.

In a condensation reaction, two or more molecules combine to form a larger molecule while releasing a smaller molecule as a byproduct, often water. In the case of protein synthesis, the individual amino acids undergo a condensation reaction to form peptide bonds and create a protein chain.

During protein synthesis, amino acids, which are the building blocks of proteins, are joined together through a condensation reaction. The process involves the removal of a water molecule (H2O) from the amino and carboxyl groups of adjacent amino acids. The amino group of one amino acid reacts with the carboxyl group of another amino acid, resulting in the formation of a peptide bond and the release of water.

This sequential condensation reaction occurs repeatedly, linking amino acids together one by one, forming a linear chain known as a polypeptide. As more amino acids are added to the chain, the polypeptide continues to grow until the desired protein structure is achieved.

The condensation reaction in protein synthesis is also referred to as dehydration synthesis because water is eliminated as a byproduct. It is called dehydration synthesis because the formation of the peptide bond results in the loss of a water molecule.

So, the polymerization of amino acids into a protein is an example of a condensation reaction or dehydration synthesis, as water molecules are removed during the formation of peptide bonds between amino acids.

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Answer: The answer is true.

Explanation: Avogadro's number is a mole, which concludes that this statement is true.

The cell potential for the given unbalanced reaction is 2.334 V.

To calculate the cell potential, we first need to balance the reaction:
Mg(s) + 2Fe³⁺(aq) → Mg²⁺(aq) + 2Fe(s)

Next, we find the difference in standard reduction potentials:
E°(Mg²⁺/Mg) = -2.37 V
E°(Fe³⁺/Fe) = -0.036 V
E°cell = E°(Mg²⁺/Mg) - E°(Fe³⁺/Fe) = -2.37 - (-0.036) = -2.334 V

Now, we apply the Nernst equation to account for non-standard conditions:
E = E° - (RT/nF)ln(Q)
where R = 8.314 J/mol·K, T = 298 K, n = 2 moles of electrons, F = 96485 C/mol, and Q is the reaction quotient.

Q = [Mg²⁺]/[Fe³⁺]² = (0.000612)/(1.29)²

E = -2.334 - (8.314 * 298)/(2 * 96485) * ln(0.000612/1.29²)
E ≈ 2.334 V

Thus, the cell potential for the given reaction is 2.334 V.

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Answer:

MgO

Explanation:

Mg, which is magnesium, is considered a metal, when paired with Oxygen, which is a gas, it creates magnesium oxide, and the formula itself is a pairing of a metal with a nonmetal

Answer:

\(\boxed{MgO}\)

Explanation:

Metals are red, nonmetals are blue, and metalloids are yellow in the attached file.

Using this table, you can see that Mg is a metal and O is a nonmetal, which fits the question criteria.

Hope this helps!

the strong nuclear force. This force is much stronger than the electromagnetic force that causes protons to repel each other. The strong nuclear force is able to overcome the repulsion between protons and bind them together in the nucleus.

This is what makes the nucleus stable, despite the fact that it contains positively charged protons that would normally repel each other. Without the strong nuclear force, atomic nuclei would not be able to exist in their current form.

To answer your question, although protons repel each other because each one has a positive charge, protons are stable in a nucleus because of the strong nuclear force.

The strong nuclear force is a fundamental force in nature that acts between nucleons (protons and neutrons) in the atomic nucleus. This force overcomes the electrostatic repulsion between protons, allowing them to remain stable in the nucleus. The strong nuclear force has a short range, typically acting over distances of about 1 femtometer (1x10^-15 meters), and is stronger than the electrostatic force at these distances.

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Answer:

i hope it will help you ..

The moles of sodium chloride we need to make 500mL solution is 0.125 mole.

Molarity of any solution tells about the concentration and it is define as the no. of moles of solute present in per liter of solution, and it is represented as:

M = n/V, where

M = molarity of given NaCl solution = 0.250M

V = volume of NaCl solution = 500mL = 0.5L

No we put these values on the above equation and calculate for n, we get:

n = (0.250M)(0.5L) = 0.125 mole

Hence, required moles of NaCl is 0.125 mole.

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The pressure of carbon monoxide changes from 6.7 kPa to a new value when the volume changes from 572.3 L to 75.1 L.

To find the new pressure of carbon monoxide, we can use the principle of Boyle's law, which states that the product of pressure and volume is constant for a given amount of gas at a constant temperature. Mathematically, this can be represented as P₁V₁ = P₂V₂, where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume.

Plugging in the values given, we have P₁ = 6.7 kPa, V₁ = 572.3 L, and V₂ = 75.1 L. Solving for P₂, we can rearrange the equation as P₂ = (P₁ * V₁) / V₂.

Substituting the values, we get P₂ = (6.7 kPa * 572.3 L) / 75.1 L. Evaluating this expression will give us the new pressure of carbon monoxide when the volume changes to 75.1 L.

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It turned out instead that some carbon 14 from the environment had contaminated the charcoal from the last part, would the true age of the same be (lower) / estimation is younger than its true age  Contaminated samples, naturally, will have inaccurate results.

Radiocarbon dating has revolutionized how we think about the last 50,000 years. In 1949, Professor Willard Libby established the first radiocarbon dates. He later won the Nobel Prize for his work on dating by contrasting the three distinct carbon isotopes. The number of protons in the nuclei of different isotopes of a given element are the same, but the number of neutrons varies. This indicates that they have distinct masses despite having extremely similar chemical properties.

The number superscript denotes the isotope's total mass. The heaviest isotope, 14C (radiocarbon), is radioactive while the lighter isotopes, 12C and 13C, are stable. This indicates that because its nucleus is so massive, it is unstable. 14C decomposes to nitrogen over time (14N). The majority of 14C is created in the upper atmosphere when neutrons from cosmic rays interact with 14N atoms. After that, it undergoes oxidation to produce 14CO2, which is released into the atmosphere where it mixes with 12CO2 and 13CO2. After being utilized by plants for photosynthesis, this CO2 moves up the food chain.

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The number of atoms of each element present are 1.4 × 10²³ atoms of water, 9.27 × 10²² atoms of carbon dioxide, 1.62 × 10¹⁸ atoms of benzene and 1.36 × 10²⁴ atoms of sucrose.

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

a. Mass of water = 4.21g

Moles = 4.21 / 18

= 0.233 moles

number of atoms = 6.023 × 10²³ × 0.233

= 1.4 × 10²³ atoms.

b. mass of carbon dioxide = 6.81g

moles = 6.81 / 44

= 0.154 moles

number of atoms = 6.023 × 10²³ × 0.154

= 9.27 × 10²² atoms.

c. mass of benzene = 0.00021g

moles = 0.00021 / 78

= 2.69 × 10⁻⁶ moles

number of atoms = 6.023 × 10²³ × 2.69 × 10⁻⁶

= 1.62 × 10¹⁸ atoms.

d. 2.26 moles

number of atoms = 6.023 × 10²³ × 2.26

= 1.36 × 10²⁴ atoms.

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Answer:

Oxidation: The combustion of food and releasing energy in the presence of oxygen is called oxidation. Breathing: The process of taking oxygen and throwing carbon dioxide is called breathing. Respiration: The process of burning of food taken by organisms in the body to release energy is called respiration.####

Answer:

These are the answers:.

Explanation:

Respiration has many meanings.

Hope it helps.

Answer: 4g/cm^3 or 4000g/L (4kg/L)

Explanation:

I'm not sure what units the question intended so I put both. For the first one, the equation for density is mass/volume so I divided the 20g by 5cm^3 to get 4g/cm^3. Just in case those aren't the intended units for volume and is instead liters, one cm^3 equals one ml. In addition, there are 1000ml in every liter so you can determine the amount per liter by multiplying 4g/ml by 1000 to get 4000g/L or 4kg/L.

I hope this helps.

Answer:

D.) The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.

Answer

The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.

Answer:

the rock is dencer than the water and the stick has more surface tension.

Answer:

The rock is heaver so it sinks to the bottom of the lake, and the and the stick is lighter so it floats.

Hope this helps☺️

Explanation:

This reaction is also known as double decomposition reaction.

HCl + CaCO3 + MgCO3 → H2O + H2 + CO2 + CaCl2 + MgCl2

Answer:

I believe it's copper

Explanation:

The reasoning being that Copper = 9.0 g/cm and the mystery item has 5.0 cm so 9*5 = 45 something like that

Answer:

I don't think your answer is correct, It's B

Explanation:

Answer:

option D is correct answer of this question

option D is correct answer of this questionbecause the rainforest environment is different than the desert environment

option D is correct answer of this questionbecause the rainforest environment is different than the desert environment hope it will help

The reason of why rainforest plants adapted to be a different shape  as compared to the desert plants is because of option d. as the rainforest environment is different than the desert environment.

It can be like:

hence,  The reason of why rainforest plants adapted to be a different shape as compared to the desert plants is because of option d. as the rainforest environment is different than the desert environment.

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The addition products formed after the reaction are 4-bromo-2-hexene and 2-bromo-3-hexene.

The simplest type of electrophilic reaction to visualize is the addition of as haloacid such as Hbr to an isolated alkene.

The reaction starts between terminal carbon of the double bonds and H⁺. After attaching H⁺ to the carbon, one double bond disappears leaving nearby CH respectively charged. This intermediate is a resonance hybrid of two possible structures. Reaction of bromide at one of the carbons give the 1.2-addition product and at the other carbon gives 1,4-addition product.

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In the electron transport chain, 1 NADH molecule pumps 10 protons.

The electron transport chain (ETC) is a series of protein complexes that transfer electrons from NADH and FADH2 to oxygen. As electrons are transferred, energy is released, which is used to pump protons (H+) from the mitochondrial matrix to the intermembrane space. This creates a proton gradient, which drives the synthesis of ATP by ATP synthase.

Each NADH molecule that enters the ETC pumps 10 protons across the inner mitochondrial membrane. This is because four protons are pumped by complex I, four protons are pumped by complex III, and two protons are pumped by complex IV.

The number of ATP molecules produced per NADH and FADH2 molecule varies depending on the organism. In humans, each NADH molecule produces about 3 ATP molecules, while each FADH2 molecule produces about 2 ATP molecules.

Thus, in the electron transport chain, 1 NADH molecule pumps 10 protons.

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Answer:

drought

Explanation:

because it looses all of the water in the aria / desertification

Safely disposing of corrosive substances can be challenging due to their potential to cause harm to human health, the environment, and infrastructure. These substances possess properties that make their handling, transportation, and disposal more complex and require special precautions to mitigate risks effectively.

Corrosive substances, such as strong acids or bases, can cause severe burns or tissue damage upon contact with the skin, eyes, or respiratory system. Their corrosive nature also poses a risk of damaging containers, pipelines, or storage facilities, which may lead to leaks or spills. Furthermore, corrosive substances can contaminate soil, water sources, and ecosystems, causing adverse ecological effects.

The difficulty in safely disposing of corrosive substances lies in their potential for harm and the need to prevent exposure or contamination. Proper disposal methods often involve neutralizing the corrosive properties, ensuring secure containment, and adhering to specific regulations and guidelines. Additionally, due to their hazardous nature, corrosive substances may require specialized facilities or processes for treatment or disposal, adding complexity to their management.

Overall, the challenges in safely disposing of corrosive substances stem from the need to protect human health, prevent environmental harm, and ensure the integrity of infrastructure. Proper handling, treatment, and disposal methods are crucial to mitigate the risks associated with these hazardous materials and to safeguard both people and the environment.

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Answer:

thermal shock

Explanation:

the temperatures inside the glass jar should have continued to increase over time. Internal stresses due to uneven heating. This is also known as “thermal shock”.

In general, the thicker the glass, the more prone it will be to breaking due to the immediate differences in temperature across the thickness of glass.

Borosilicate glass is more tolerant of this, as it has a higher elasticity than standard silicon glass.

You may also note that laboratory test tubes and flasks are made with thinner walls, and of borosilicate glass, when designated for heating.