Which of the following ions/atoms has the smallest radius?
A. O2-
B. Ne
C. Mg2+
D. F-
E. Na+​

Answer:

The three parts of the nucleotide building block of DNA are the sugar, the base and the phosphate.

Explanation:

Hope that helps!

Answer:

three parts of the nucleotide building block of DNA are the sugar, the base and the phosphate.

Approximately 8,199.30 grams or 8.1993 kg of Cl would be emitted into the atmosphere each year if the Freon leak were allowed to continue.

To determine the amount of Cl (chlorine) emitted into the atmosphere each year due to the Freon leak, we need to consider the molar mass and molecular structure of CHF2Cl (Freon-22).

The molar mass of CHF2Cl is approximately 86.47 g/mol. Given that 20 kg of CHF2Cl is released per month, we can convert it to grams: 20 kg * 1000 g/kg = 20,000 g.

Next, we calculate the number of moles of CHF2Cl: 20,000 g / 86.47 g/mol = 231.31 mol.

Each molecule of CHF2Cl contains one chlorine atom, so the number of moles of Cl is the same as the number of moles of CHF2Cl, which is 231.31 mol.

To convert moles to grams, we multiply by the molar mass of chlorine (35.45 g/mol): 231.31 mol * 35.45 g/mol = 8,199.30 g.

Therefore, approximately 8,199.30 grams or 8.1993 kg of Cl would be emitted into the atmosphere each year if the Freon leak were allowed to continue.

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Answer:

Yes is incorrect

Explanation:

not all veins carry blood rich in CO2 , the pulmonary vein carries blood with O2 which means that not all veins carry blood rich in CO2

When a system is at equilibrium, the value of ÎSsys is zero, but the surroundings still experience a change in entropy (ÎSsurr) due to the transfer of heat between the system and surroundings. The value of ÎSsurr can be calculated using the formula ÎSsurr = -ÎSsys/T.

When a system is at equilibrium, it means that the rate of the forward and reverse reactions are equal, and there is no net change in the system. At this point, the system and the surroundings are in thermal equilibrium, meaning they are at the same temperature.

In this scenario, the change in entropy of the system (ÎSsys) is equal to zero, as there is no net change in the system. However, the surroundings still experience a change in entropy (ÎSsurr). This is because heat is transferred between the system and surroundings until both reach the same temperature. This transfer of heat results in a change in entropy of the surroundings.

The value of ÎSsurr can be calculated using the formula ÎSsurr = -ÎSsys/T, where T is the temperature at which the system and surroundings are in equilibrium. The negative sign in the equation indicates that the change in entropy of the surroundings is opposite in sign to the change in entropy of the system.

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One ATP molecule hydrolyzes to provide 7.3 kcal/mol of energy.

ATP (adenosine triphosphate) is a molecule that stores and transports chemical energy within cells. The energy stored in ATP is used to power many cellular processes, including metabolism, protein synthesis, and cell division.

The energy in ATP is stored in the bonds between its three phosphate groups. When one of these bonds is broken, energy is released and ATP is converted to ADP (adenosine diphosphate). This energy can then be used to power up cellular processes.

The energy of ATP is stored in the bonds between its phosphate groups and is used to power many important cellular processes.

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The mass change of the beaker containing a dialysis tubing with 0.8M sucrose, enclosed by a dialysis bag impermeable to sucrose, is due to the movement of water molecules through the dialysis bag.

The sucrose concentration inside the dialysis tubing is higher (0.8M) compared to the sucrose concentration in the beaker (0.1M). This creates an osmotic gradient, where water molecules tend to move from an area of lower solute concentration (the beaker) to an area of higher solute concentration (inside the dialysis tubing).

As water molecules move across the dialysis bag, the beaker experiences a net loss of water, resulting in a decrease in mass. The sucrose molecules, being too large to pass through the impermeable dialysis bag, remain inside the tubing.

This process, known as osmosis, continues until the sucrose concentrations inside and outside the dialysis tubing reach equilibrium. At this point, the mass change of the beaker will stabilize, and no further net movement of water will occur.

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The formation of molecule can easily be shown by drawing Lewis dot structure. Therefore, SiH\(_3\)⁻ will have  1 lone pair as well as it has a negative formal charge.

Lewis dot structure is a way to represent the valence electron of an element in the form of dot. These are mainly beneficial in understanding the chemical formula of covalent compound.

Si belongs to group 14 of periodic table that is carbon family, so valence electron is 4. One electron is added to this due to one negative charge over the compound. Out of 5 unpaired electron, 3 covalent bond is formed with one electron of hydrogen. Two electron is left over silicon. 1 lone pair as well as it has a negative formal charge.

Therefore, SiH\(_3\)⁻ will have  1 lone pair as well as it has a negative formal charge.

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Answer:

h20 water is the answer

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.98grams are present in  45.73 moles of  BCl\(_3\).

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The stoichiometry represents the number of moles.

Mathematically,

number of moles of  BCl\(_3\) =given mass of BCl\(_3\) ÷ molar mass of BCl\(_3\)

Molar mass of 1 mole of BCl\(_3\) = 46.264 g/mol

number of moles of  BCl\(_3\) = 45.73 moles

Substituting all the given values in the above equation, we get

45.73 moles =mass of BCl\(_3\)÷46.264 g/mol

mass of BCl\(_3\)   =0.98grams

Therefore, 0.98grams are present in  45.73 moles of  BCl\(_3\).

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Answer:

1.138158E24 atoms or 1.14 x 10^24 atoms

Explanation:

To find atoms/particles from moles you just want to convert using avogadro's number which is 6.022 x 10^23

1.89 mol x 6.022 • 10^23

———— = 1.138158E24 atoms

1 mol

so 1.138158E24 atoms or 1.14 x 10^24 for scientific notation

hope this helps :)

Answer:

Gas exchange takes place in the millions of alveoli in the lungs.

Explanation:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

To form a dipeptide between Alanine and Leucine, we have to join the carboxyl group (COOH) of Alanine with the amino group (NH₂) of Leucine via a peptide bond. The resulting molecule will have a zwitterionic form. The zwitterionic form of the dipeptide will have both a positive and a negative charge.

A dipeptide is a molecule made up of two amino acid residues joined together via a peptide bond. A peptide bond is a bond between the amino group (NH₂) of one amino acid and the carboxyl group (COOH) of another amino acid. Amino acids are the building blocks of proteins. Alanine and Leucine are two of the twenty common amino acids found in nature.

A zwitterion is a molecule that has a positive charge on one part of the molecule and a negative charge on another part of the molecule. Zwitterions are electrically neutral overall. They are formed when a molecule that has both acidic and basic functional groups is dissolved in a solvent. The acidic and basic groups react with each other to form a neutral molecule that has both positive and negative charges. The zwitterionic form of an amino acid is the form that is found in proteins.

The chemical formula for Alanine is C₃H₇NO₂, and the chemical formula for Leucine is C₆H₁₃NO₂. To form a dipeptide between Alanine and Leucine, we have to join the carboxyl group (COOH) of Alanine with the amino group (NH₂) of Leucine via a peptide bond. The resulting molecule will have a zwitterionic form. The zwitterionic form of the dipeptide will have both a positive and a negative charge.

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The volume of HCl required is less (10 mL) compared to the volume of NaOH added (20 mL) because the concentration of HCl is twice as high as the concentration of NaOH.

To explain the difference in volumes of NaOH and HCl required to reverse the dissolution of a sample, we need to consider the stoichiometry and reaction equations involved.

Let's assume the substance being dissolved in water is a strong acid, represented as HA. When HA dissolves in water, it forms its conjugate base A- and releases H+ ions. The reaction can be represented as:

\(HA + H_2O - > A- + H_3O^+\)

To reverse the dissolution and neutralize the solution, we need to add a strong base (NaOH) or a strong acid (HCl) that can react with the H3O+ ions. The reaction between NaOH and HCl with H3O+ can be represented as:

\(NaOH + H_3O+ - > H_2O + Na^+\)  (1)

\(HCl + H_3O+ - > H_2O + Cl^-\)   (2)

For NaOH:

Moles of NaOH = 3 M x 0.020 L = 0.060 moles

For HCl:

Moles of HCl = 6 M x 0.010 L = 0.060 moles

From the stoichiometry of the reactions (1) and (2), it is clear that both NaOH and HCl react in a 1:1 ratio with H3O+. Therefore, the same number of moles of NaOH and HCl is required to neutralize the solution.

However, the volume of HCl required is less (10 mL) compared to the volume of NaOH added (20 mL) because the concentration of HCl is twice as high as the concentration of NaOH. This higher concentration compensates for the smaller volume used.

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The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G)

The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three. The hydrogen bonding between complementary bases holds the two strands of DNA together.

The quantity of water that are required to be mixed with 11. 75 g of hgcl in order to make a 0. 01 m solution is: 4970 g

In chemistry a solution is known as a homogeneous mixture of two or more components called:

To solve this molality problem, the formulas and the procedures that we have to use are:

Where:

Information about the problem:

Applying the mole (n) formula we get:

n(hgcl) =  11.75 g /236.04 g/mol

n(hgcl) = 0.0497 mol

Applying the molality formula, and clearing the m(solvent) we get:

m(solution) = n(solute)/m(solvent)

m(H2O)= 0.0497 mol /0.01 m

m(H2O)= 4.97 kg

Converting the mass units from (kg) to (g) we have:

m(H2O)= 4.97 kg * (1000 g/1kg)

m(H2O)= 4970 g

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The mass of one copper atom is approximately 1.055 x 10^-22 g.

So, the correct option is A. 1.055 x 10^-22 g.

To calculate the mass of one copper atom, we can use the molar mass of copper (Cu) and Avogadro's number (NA). Given that the molar mass of copper is 63.55 g/mol and Avogadro's number is 6.022 x 10^23 mol⁻¹, we can set up the conversion as follows:

1 mole of copper = 63.55 g (from the molar mass)

1 mole of copper = 6.022 x 10^23 atoms (from Avogadro's number)

To find the mass of one copper atom, we need to divide the molar mass by Avogadro's number:

Mass of one copper atom = (63.55 g) / (6.022 x 10^23 atoms)

Mass of one copper atom ≈ 1.055 x 10^-22 g (rounded to three significant figures)

Therefore, the mass of one copper atom is approximately 1.055 x 10^-22 g.

The correct option is A. 1.055 x 10^-22 g.

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The following reaction is involved in generation of electricity of methane(combustion reaction) CH4+2 O2 →CO2 + 2 H2O. During the process,Hydrogen atoms share electrons with oxygen to form water

When a hydrocarbon and oxygen combine to form carbon dioxide and water, this process is referred to as a combustion reaction. Methane, a hydrocarbon, interacts with oxygen in the chemical equation above, producing carbon dioxide and water as byproducts, demonstrating that the reaction is a combustion process. The chemical bonds between oxygen and methane are broken down and then rearranged to produce the products during the reaction, which also releases energy.

the hydrocarbon methane (ch4) is used to generate electricity. what happens to the hydrogen atoms in methane during this process? (think about the combustion reaction)

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The three different layers of the skin are the epidermis, the dermis, and the subcutaneous tissue.

Melanocytes are cells in the epidermis that produce and distribute the pigment melanin, which gives color to the skin and helps protect it from the harmful effects of UV radiation.

Dendritic cells are immune cells that reside in the epidermis and function in identifying and presenting foreign antigens to other immune cells.

Merkel cells are specialized cells in the epidermis that combine with nerve endings to form Merkel cell-neurite complexes, which are involved in the sense of touch.

The thicker and more durable skin on the palms of the hands and soles of the feet is called the "stratum lucidum," while the rest of the skin is called the "stratum corneum."

The five layers of the epidermis from deepest to most superficial are:

A helpful mnemonic for remembering the layers of the epidermis is "Come, Let's Get Sun Burned," which stands for:

The three layers of the dermis are the papillary dermis, the reticular dermis, and the subcutaneous layer.

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Answer:

the 3rd one (0.01 cm the one selected already)

Explanation:

copper wire isn't excessively big, and it wraps around the pencil because its malleable. I think that the most accurate would be 0.01 cm

Answer:

it takes place only at extremely night temperatures

Explanation:

I looked it up

Answer:

In nature, fusion reactions take place in the Sun and other stars.

Explanation:

Edmentum sample answer!!

Answer:

Mass of Cl = 35.5

Mass of Cl2 => 35.5×2

=> 71 g/mol

hope that helps ✌

71

The atomic mass of chlorine is equal to the molar mass of chlorine so the molar mass of chlorine is 35.5

=> molar mass for Cl^2: 35,5*2=71

Answer:

0.200 M

Explanation:

Step 1: Given data

Step 2: Calculate the moles (n) of CoCl₂ (solute)

We will use the following expression.

n = m / M

n = 2.60 g / (130. g/mol) = 0.0200 mol

Step 3: Calculate the molar concentration of the solution

Molarity is equal to the moles of solute divided by the liters of solution.

M = n/V

M = 0.0200 mol/0.100 L = 0.200 M

To compare your results to the other groups in your class, you should consider two possible reasons for any similarities and differences you identified.

To compare your results to the other groups in your class, you should consider two possible reasons for any similarities and differences you identified. First, the methodology used by each group could have influenced the results. Variations in data collection methods, sample sizes, or experimental conditions might lead to different outcomes. Secondly, the individual skills and experiences of group members could contribute to similarities or differences. Different levels of expertise, background knowledge, or work ethic might impact the results. Remember to analyze these factors objectively and seek insights from your peers or instructor for a comprehensive understanding.

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Answer:

Petroleum refinery capacity in the UAE 2009-2018

In 2018, the total production capacities of all refineries in the UAE were 1.13 metric barrels per day. Total total production capacity of the al-Ruwais refinery in the United Arab Emirates was approximately 817,000 metric barrels per day.

Answer: malleability

Explanation:

Answer:

C

Explanation:

I think too hehehe...same C

Answer:

The answer is 10

Explanation:

Answer:

Explanation:

Well At 0 °C and 1 atm pressure (STP conditions), ideal gases have a molar volume of 22.4 Liters. When the molar volumes of NH3 and CH4 are measured at STP, the molar volume of NH3 is 22.1 L and the molar volume of CH4 is 22.4 L. ... NH3 molecules take up more volume than CH4 molecules.