11 Which of the following forces are involved in maintaining the quaternary structure of a protein? a. hydrogen bonds b.ionic interactions c. hydrophobic interactions d. All of these

Answer: The four main components of the earth system may be described briefly in the ... as energy is transformed from one form to another in performing work, heat is ... of solar radiation received (and re-emitted) at different points on the earth's surface. ... In general, cycles occur in closed systems; at the global scale, many systems

Explanation:

Answer: A

Explanation: You do the math to do the thingy

Answer: A  Because I asked My teacher

Explanation: Hope it helps

Explanation:

hdhehdbrhdns dhdjdjdhrjs dhfirjr rudjdbe dbdud d

Answer:

Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).

Explanation:

Answer:

\(Q=2091J=2.091kJ\)

Explanation:

Hello,

In this case, the formula we use to compute the heat Q by increasing the temperature, in terms of the mass and the heat capacity is:

\(Q=mCp(T_2-T_1)\)

Titanium's heat capacity is 0.544284 J/g°C, thus, the for such temperature increase, the heat results positive as shown below:

\(Q=22.6g*0.544284\frac{J}{g^oC}*(1590^oC-1420^oC) \\\\Q=2091J=2.091kJ\)

Best regards.

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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The percent composition of each element in CaSO4. S 1 23.21 O 4 46.32 Ca 1 29.00.

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Answer:

Option E!

Explanation:

If we were to draw the lewis dot structure for IBr2 -, we would first count the total number of valence electrons ( " available electrons " ). Iodine has 7 valence electrons, and so does Bromine, but as Bromine exists in 2, the total number of valence electrons would be demonstrated below;

\(7 + 7 * ( 2 ) =\\7 + 14 + 1 =\\22 Electrons\)

Don't forget the negative on the Bromine!

Now go through the procedure below;

1 ) Place Iodine in the middle and draw single bonds to each of the bromine.

2 ) Add three lone pairs on each of the Bromine's

3 ) Now we have 6 electrons left, if we were to exclude the electrons shared in the " single bonds. " This can be placed as three lone pairs on Iodine ( central atom )!

The molecular geometry can't be linear, as there are lone pairs on the atoms. This makes it bent.

Answer:

[Ar]4s23d104p3

Explanation:

Answer:

[Ar]4s23d104p3 (Option A)

Explanation:

on edge2021 :D

The amount, in mL, of the suspension that should be given to an infant weighing 17 lb will be 1.16 mL

0.8 mL of the liquid contains 80.0 mg of the drug.

The recommended dose is 15 mg per kg of body weight

The infant to be given the drug weighs 17 lb.

First, let's convert the weight of the infant to kg.

1 lb = 453.59 g

17 lb =       453.59 x 17/1

                   = 7711.03 g

1000 g = 1 kg

7711.03 g = 7711.03 x 1/1000

               = 7.711 kg

So, the baby's weight is 7.711 kg.

The drug dose for the baby can thus be calculated as:

15 mg x 7.711 = 115.67 mg

But 0.8 mL of the drug contains only 80.0 mg. How many mL will contain 115.67 mg?

                   0.8 x 115.67/ 80.0 = 1.16 mL

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Answer:

I believe it is Mass of marbles this may be wrong

Explanation:

Answer:

b

Explanation:

6. 1 \(SO_{3}\) + 1 \(H_{2}O\) --> 1 \(H_{2} SO_{4}\)

8. 1 \(K_{2}O\) + 1 \(H_{2}O\) --> 2 KOH

12. 1 \(CdSO_{4}\) + 1 \(H_{2} S\) --> 1 CdS + 1 \(H_{2} SO_{4}\)

Answer:

A

Explanation:

Answer: I think so.. (sorry if i am wrong)

Explanation:  Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. A physical property is a characteristic of matter that is not associated with a change in its chemical composition.

Answer:

first one pure

second one mixture..

The empirical formula of the compound is C₂H₁₆S₂N₃O.

The moles of each element is as follows::

For CO₂:

Carbon (C) has a molar mass of 12.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of C in CO₂ = 2.08 g / 12.01 g/mol = 0.173 moles

Moles of O in CO₂ = 2.08 g / 16.00 g/mol = 0.130 moles

For H₂O:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in H₂O = 1.28 g / 1.01 g/mol = 1.27 moles

Moles of O in H₂O = 1.28 g / 16.00 g/mol = 0.080 moles

For SO₃:

Sulfur (S) has a molar mass of 32.06 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of S in SO₃ = 4.77 g / 32.06 g/mol = 0.149 moles

Moles of O in SO₃ = 4.77 g / 16.00 g/mol = 0.298 moles

For HNO₃:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Nitrogen (N) has a molar mass of 14.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in HNO₃ = 3.48 g / 1.01 g/mol = 3.45 moles

Moles of N in HNO₃ = 3.48 g / 14.01 g/mol = 0.248 moles

Moles of O in HNO₃ = 3.48 g / 16.00 g/mol = 0.217 moles

The simplest whole-number ratio of the elements will be:

Carbon: 0.173 moles / 0.080 moles ≈ 2.16

Hydrogen: 1.27 moles / 0.080 moles ≈ 15.88

Sulfur: 0.149 moles / 0.080 moles ≈ 1.86

Nitrogen: 0.248 moles / 0.080 moles ≈ 3.10

Oxygen: 0.080 moles / 0.080 moles = 1

Therefore, the empirical formula is C₂H₁₆S₂N₃O.

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The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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Answer:

chemistry, deposition occurs when molecules settle out of a solution. Deposition can be viewed as a reverse process to dissolution or particle re-entrainment. It is a phase change from the gaseous state to a solid, without passing through the liquid state, also called re-sublimation.

Explanation:

Examples include beaches, deltas, glacial moraines, sand dunes and salt domes. In severely cold temperatures frost will form on windows because the water vapor in the air comes into contact with a window and immediately forms ice without ever forming liquid water.

Answer:

evidence you see with your eyes

Explanation:

to be my friend and I think

1) A precipitate called \(Fe(OH)_{2}\)

2) A precipitate is formed called \(Mg(CH_{3} COO)_{2}\)

The term precipitate is used to describe the product that is formed when there is a reaction between two aqueous phase reactants that leads to the formation of a solid product from the reaction as we can see from the image that is attached.

we now have to look at the reactions as we can see them in the mage that is attached. We must note that we can only say that a precipitate has been formed if the product is solid after we have mixed the aqueous phase reactants.

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Answer:

first choice

Explanation:

energy is written on the left side is its absorbed

2 elements came together so bonds are formed.

Answer:

you will add then subtract to get the answer

Answer:

Carbon Dioxide is and example of an element and Carbon is an example of compound

Answer:

What is the mole fraction of sulfuric acid in a solution containing 98% sulfuric by mass?

What is the mole fraction of H2SO4 in a 98% aqueous H2SO4 solution?

Here given..

98 % of H2SO4 that means 98 g of H2SO4 is there in 100 g of aq. H2SO4 solution.

So.

Mass of solute = 98 g

Mass of solvent = 2 g (as water is considered as universal solvent)

Molar mass of solute = 98 g

Molar mass of solvent = 18 g

No of moles of solute = 1 mole (no of moles = given mass / molar mass)

No of moles of solvent = 2/18 = 1/9 moles

And ,

We know formula for mole fraction is..

x( of solute) = Moles of solute/(moles of solute + moles of solvent)

x (of solute) = 1/(1+(1/9)) = 0.9

x (of solvent) = 1 - 0.9 = 0.1

Explanation:

it is just number 1

Iridium forms metallic bonds, while mercury exhibits a combination of metallic and covalent bonding. These covalent interactions give rise to the low boiling point and weak intermolecular forces in liquid mercury.

Iridium (Ir) and mercury (Hg) exhibit different types of bonding based on their electronic configurations and properties.

Iridium is a transition metal belonging to Group 9 of the periodic table. It has a partially filled d-orbital in its atomic structure, which allows it to form metallic bonds. Metallic bonding occurs when the outer electrons of metal atoms are delocalized and form a "sea" of electrons that are free to move throughout the crystal lattice. This results in the characteristic properties of metals, such as high electrical and thermal conductivity, malleability, and ductility. Iridium forms metallic bonds with other iridium atoms, contributing to its solid, dense, and lustrous nature.

Mercury, on the other hand, is a unique element. It is a transition metal, but it exhibits characteristics of both metallic and covalent bonding. At room temperature, mercury exists as a liquid, which is highly unusual for a metal. This is because mercury atoms have a weak interatomic interaction, known as metallic bonding, similar to other metals. However, due to the presence of unpaired electrons in its 6s orbital, mercury can also form weak covalent bonds. These covalent interactions give rise to the low boiling point and weak intermolecular forces in liquid mercury.

In summary, iridium forms metallic bonds, while mercury exhibits a combination of metallic and covalent bonding.

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Answer:

AZ₂

Explanation:

The formed compound will not contain Q because mass percentages, %A and %B, form 100% of the compound.

Steps

Solving

From the calculation, the pH of the solution can be obtained as 0.39.

We first have to obtain the dissociation constant of the solution;

α = √Ka/C

Ka = Cα^2

Ka = 4.9 * 10^-3 * 6

Ka = 0.0294

Then we have that;

0.0294 = [x]^2/[6 - x]

0.0294 * [6 - x] = x^2

0.1764 - 0.0294 x = x^2

x^2 +  0.0294 x - 0.1764 =0

x = 0.41 M

Thus the pH of the solution is;

pH = -log[0.41]

= 0.39

pH is an important parameter in chemistry, biology, and many other fields, as it can affect the behavior and properties of substances and reactions.

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Answer:

The correct answer is - d. hydrogen bonding.

Explanation:

Water has strong hydrogen bonds between its molecules that require a very high amount of energy in order to break. Water molecules are joined together or bound with a strong intermolecular force called hydrogen bonds.

These bonds require more kinetic energy which means more temperature or heat in order to break the bonds and turn into steam and this is the reason it has a high boiling point.