match each level of protein structure with the covalent/non-covalent interaction or entropic driving force that is featured in its construction.

3.21 grams of Aluminum Sulfate are got when 4 g of Aluminum Nitrate reacts chemcially with 3 g of Sodium Sulfate.

The equation given is not balanced. Thus,  when balanced the equation becomes:

2 Al(NO₃)₃ + 3 Na₂SO₄ → Al₂(SO₄)₃ + 6 NaNO₃

The molar mass of Al(NO₃)₃ is:

Al(NO₃)₃ = 1(Al) + 3(N) + 9(O) = 213 g/mol

The molar mass of Na₂SO₄ is:

Na₂SO₄ = 2(Na) + 1(S) + 4(O) = 142 g/mol

From the balanced equation, we can see that 2 moles of Al(NO₃)₃ react with 3 moles of Na2SO4 to produce 1 mole of Al₂(SO₄)₃. Therefore, we can calculate the number of moles of Al(NO₃)₃ and Na₂SO₄ that react:

Number of moles of Al(NO₃)₃ = 4 g / 213 g/mol = 0.0188 mol

Number of moles of Na₂SO₄ = 3 g / 142 g/mol = 0.0211 mol

From the balanced equation, we can see that 2 moles of Al(NO₃)₃ produce 1 mole of Al₂(SO₄)₃. Therefore, the number of moles of Al₂(SO₄)₃ produced is:

Number of moles of Al₂(SO₄)₃ = 0.0188 mol / 2 * 1 = 0.0094 mol

The molar mass of Aluminum Sulfate (Al₂(SO₄)₃) is:

Al₂(SO₄)₃ = 2(Al) + 3(S) + 12(O) = 342 g/mol

Therefore, the mass of Aluminum Sulfate produced is:

Mass of Al₂(SO₄)₃ = Number of moles of Al₂(SO₄)₃ * Molar mass of Al₂(SO₄)₃

= 0.0094 mol * 342 g/mol

= 3.21 g

Hence, 3.21 grams of Aluminum Sulfate are liberated when 4 g of Aluminum Nitrate change state with 3 g of Sodium Sulfate.

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Answer:

Turnover number = 113182s⁻¹

Explanation:

Turnover number is a concept used to know the activity of an enzyme. The higher turnover number, the higher activity of the enzime.

Turnover number is defined as:

Turnover number = Rmax / [E]t

As Rmax is  249 μmol⋅L⁻¹⋅s⁻¹ and [E]t is 2.20 nmol⋅L⁻¹

As 1μmol = 1000nmol, Rmax = 249000 nmol⋅L⁻¹⋅s⁻¹. Replacing:

Turnover number = 249000 nmol⋅L⁻¹⋅s⁻¹ / 2.20 nmol⋅L⁻¹

Answer:

(a)

From surrounding to wax

(b)

Q = 2.62 KJ

(c)

Density of a substance is defined as the no. of particles of the substance, that occur in a unit volume. So, when the substance melts, the inter-molecular attractive forces and bonds between molecules or atoms are weakened. This, increases the distance between the molecules or atoms. Hence, the no. of particles in a unit volume is decreased. As, a result of this, the density of the substance also decreases.

Explanation:

(a)

During the melting process, the solid material or substance requires energy, in order to break the bonds between its molecules or atoms.

Therefore, while the wax is melting, the net flow of thermal energy is from surrounding to the wax.

(b)

The amount of energy required to melt solid paraffin wax is given by the formula:

Q = nC

where,

Q = amount of energy

C = Molar Heat of Fusion = 48.78 KJ/mol

n = No. of Moles = Mass in gram/Molar Mass = (15.2 g)/(282.62 g/mol)

n = 0.0538 mol

Therefore,

Q = (0.0538 mol)(48.78 KJ/mol)

Q = 2.62 KJ

(c)

Density of a substance is defined as the no. of particles of the substance, that occur in a unit volume. So, when the substance melts, the inter-molecular attractive forces and bonds between molecules or atoms are weakened. This, increases the distance between the molecules or atoms. Hence, the no. of particles in a unit volume is decreased. As, a result of this, the density of the substance also decreases.

(a) During the melting of wax, the flow of thermal energy has been from the surroundings to the wax.

(b) The amount of heat requires for the melting of 15.215 grams of solid paraffin has been 2.62 kJ.

(c) The density decreases due to a decrease in the number of molecules per unit volume.

(a) Melting results in the conversion of solid-state to the liquid state. This step requires energy. Thus, the flow of energy has been from the surroundings to the wax.

(b) Amount of heat requires (Q) can be given by:

Q = nC

Where, n = moles of the sample, and C = heat of fusion

Moles of paraffin = \(\rm \dfrac{weight}{molecular\;weight}\)

Moles of paraffin = \(\rm \dfrac{15.215}{286.62}\)

Moles of paraffin = 0.0538 moles

Q = 0.0538 \(\times\) 48.78 kJ/mol

Q = 2.62 kJ.

The amount of heat requires for the melting of 15.215 grams of solid paraffin has been 2.62 kJ.

(c) The density has been the mass or number of particles present per unit volume. The melting of wax results in a weaker intermolecular force. The resulting liquid will have fewer molecules present in the unit volume.

Thus, the density decreases due to a decrease in the number of molecules per unit volume.

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Answer:

I would go with

B. Surface water at the poles is dense because of low temperatures and high salinity.

i could be wrong tho.

Explanation:

Answer:

The health effects of ozone layer depletion is discussed below

Explanation:

. Ozone layer depletion effects improved UV radiation levels at the

Earth's covering, which is degrading to human well-being.

Negative consequences involve improvements in several varieties of

skin cancers, eye cataracts, and immune insufficiency diseases.

• Ozone layer exhaustion improves the quantity of UVB that touches the

Earth's exterior.

Another way you could collect or determine the pressure data without using a gas pressure sensor involving the same chemical reaction is using the Ideal Gas Equation.

A gas pressure sensor is a device used to monitor and collect data on the pressure changes and variations in a gas participating in a chemical reaction.

In a chemical reaction, the Ideal Gas Equation can be used to determine the pressure data without using a gas pressure sensor if the variables are known.

For example;

The Ideal gas equation can be represented as:

where;

Therefore, we can conclude that the Ideal Gas Equation can be used to determine the pressure data without using a gas pressure sensor if the variables are known.

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Answer: 71.43 M.

Explanation: To calculate the molarity of a solution, we divide the number of moles of solute by the volume of the solution in liters. The volume of the solution in this case is given in milliliters, so we need to convert it to liters before we can calculate the molarity.

35 mL = 0.035 L (since 1 mL = 0.001 L)

So, the molarity of the solution can be calculated as follows:

Molarity = moles of solute / volume of solution in liters

Molarity = 2.50 moles / 0.035 L

Molarity = 71.43 M

Therefore, the molarity of the solution is 71.43 M.

Answer:

Second law of thermodynamics states that as energy is transferred or transformed from one form to another, more and more of it is wasted.

Explanation:

Second law of thermodynamics states that as energy is transferred or transformed from one form to another, more and more of it is wasted.

Second law of thermodynamics explains that it is impossible to convert an energy to another form of energy with 100% efficiency.

Example the conversion of heat energy to mechanical energy cannot be 100 % efficient. After the process of heating a gas to increase its pressure to drive a piston, there is always some leftover heat in the gas that cannot be used to do any additional work, this leftover heat is known as waste heat.

Answer:

b

Explanation:

I did this quiz and i think a got it right i also looked up my answer to make sure it was right good luck on quiz :)

Answer:

FLUORINE, CHLORINE, BROMINE, IODINE, ASTATILE AND TENNESINE

Explanation :

Florine and chorine=gas

Bromine=liquid

ASTATILE and TENNESINE =solid

HOPE IT is right

Answer:

Option d. 6.95 g

Explanation:

First of all, we state the reaction:

2NaCl + Pb(NO₃)₂ → PbCl₂ +  2NaNO₃

We determine the moles of each reactant, to state the limiting

Firstly we convert volume frm mL to L

0.200 L . 0.250M = 0.05 moles of NaCl

0.200L . 0.250M = 0.05 moles of Pb(NO₃)₂

Acording to stoichiometry we know that relation is 1:2, so the limiting reagent is the NaCl.

For 1 mol of Pb(NO₃)₂ I need 2 moles of NaCl

For 0.05 moles of Pb(NO₃)₂ I would need, the double → 0.1 moles

(We only have, 0.05 moles of NaCl)

Stoichiometry to the formed product is 2:1

From 2 moles of NaCl I produce 1 mol of PbCl₂

From 0.05 moles I would produce, the half → 0.025 moles

Let's convert the moles to mass → 0.025 mol . 278.1 g / 1mol = 6.95 g

6.95 g mass of lead (II) chloride would be produced.

Considering the balanced equation of the reaction:

2 NaCl + Pb(NO3)2 → PbCl2 + 2 NaNO3

Mole of 200 mL, 0.250 M NaCl = 0.200 x 0.25

                                                      = 0.05 mole

Mole of 200 mL, 0.25 M Pb(NO3)2 = 0.2 x 0.25

                                                          = 0.05 mole

Stoichiometric mole ratio of NaCl and Pb(NO3)2 = 2:1

Thus, NaCl is the limiting reactant.

Mole ratio of NaCl to PbCl2 = 2:1

Equivalent mole of PbCl2 = 0.05/2

                                           = 0.025 mole

Mass of 0.025 mole PbCl2 = 0.025 x 278.1

                                             = 6.95 g

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Answer: Cu is limiting and 1.00 mole of excess S remain

Explanation:

The chemical balanced reaction is:

\(2Cu+S\rightarrow Cu_2S\)  

According to stoichiometry :

2 moles of \(Cu\) require 1 mole of \(S\)

Thus 10.00 moles of \(Cu\) will require=\(\frac{1}{2}\times 10.00=5.00moles\)  of \(S\)

Thus \(Cu\) is the limiting reagent as it limits the formation of product and \(S\) is the excess reagent.

Moles of S left = (6.00-5.00) moles = 1.00 mole

Thus Cu is limiting and 1.00 mole of excess S remain.

Answer:

coal

Explanation:

Answer:

c. Ralph's classmate observing Daphnia in water at 30oC, 32oC and 34oC

Explanation:

When we talk about replication, we actually mean, repetition of a scientific procedure carried out by another scientist and obtaining the same results as he/she previously did.

Replication is carried out under identical conditions as the first scientist did. If Ralph's classmate wants to replicate Ralph's work, then identical temperature conditions of 30oC, 32oC and 34oC must be used, hence the answer above.

Decomposers are organisms that convert dead plants or animals into the nutrients needed by living vegetation.

The energy-transfer capacity of an environment depends on decomposers. They break down decaying organisms into simpler inorganic materials, releasing nutrients that can be used by main producers.

Decomposers are a class of organisms that make up the last component in the food chain. They decompose dead vegetation and animals and replenish the soil's essential nutrients. Because they are the original source of energy that is passed between other organisms, primary producers are crucial to the entire food chain.

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Answer:

Increasing Surface Area

Explanation:

A greater surface area (meaning more, smaller particles) allows for more opportunity for particles to collide.  On the other hand, decreasing temperature and removing a catalyst would only decrease the number of collisions, and the clumping option doesn't make much sense.  Hope this helps!

Answer:

Increasing Surface Area

Explanation:

Chemical reactions occur at the atomic level where the atoms of each reacting elements interact with one another to form products. However, one way this interaction occurs is via COLLISION OF ATOMIC PARTICLES. In accordance with the collision theory, a collision must occur between reactant atomic particles in order for a reaction to take place.

However, certain factors affect the rate at which this collision occurs. One of them is the SURFACE AREA OF THE REACTANTS. Increasing the surface area of reactants simultaneously increases the frequency at which particles collide. Hence, INCREASING SURFACE AREA increases the number of collisions between reactant molecules in a given volume.

Answer:

B

Explanation:

Option B is correct because you have 6 vertices, indicating that there ate 6 carbons in the compound.

The cation is \(V^3^+\) and the anion is \(Cl^-\) in \(VCl_3\).

An ionic compound is a chemical compound made up of charged ions called cations and anions that are held together by electrostatic forces.

Cations are elements with one or more positive charges because they have more number of protons than electrons.

Anions are elements with one or more negative charges because they have more number of electrons than protons.

An ion which has lost electrons and now has a positive net charge is said to be a cation. An atom's cation is smaller than the neutral atom because electrons are taken out to produce a cation.

An ion which has acquired electrons and now has a negative net charge is called an anion. The anion of an atom is larger than the neutral atom because electrons have been added to produce it.

In Vanadium (III) chloride, vanadium gives 3 electrons and become +3 charge and chlorine gains 1 electron and become -1 charge. Since 3 electrons are given by vanadium, 3 chlorine atoms are bonded, thus the compound is \(VCl_3\).

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The compound that acts as the precipitate in this reaction is Pbl₂, or lead(II) iodide.

In the given reaction equation:

KI + Pb(NO3)2 → KNO3 + Pbl₂

The precipitate formed is Pbl₂, which is lead(II) iodide. In the reaction, potassium iodide (KI) reacts with lead(II) nitrate (Pb(NO3)2) to form potassium nitrate (KNO3) and lead(II) iodide (Pbl₂).

Lead(II) iodide is insoluble in water, as mentioned in the statement. When the two chemicals are mixed, lead(II) iodide is formed as a solid precipitate, which appears as a golden substance, as described.

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If the potassium atoms could be lined up in a row, it would take to make a 1.00 ft row of potassium atoms is 5.45 × 10⁻⁸.

Potassium atom is represented by K with atomic number 19. It is a silvery white metal.

Given,

Radius = 280pm = 280 × 10⁻¹²m

Diameter = 2radius = 560× 10⁻¹²m = 560pm

We know that,

1 feet = 0.305m

So, number of potassium atoms that fits into the row,

1 feet = 0.305/560 × 10⁻¹²

1 feet = 5.45 × 10⁻⁸

Hence, it takes 5.45 × 10⁻⁸ atoms of potassium to make a 1 feet row.

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Answer:

rank me as brainliest

Explanation:

The esterification reaction is a name reaction in organic chemistry, where it is called Fischer esterification. In addition, when the reverse reaction is promoted by using a base, it is called a saponification reaction.

Answer:

The esterification reaction is a name reaction in organic chemistry, where it is called Fischer esterification. In addition, when the reverse reaction is promoted by using a base, it is called a hydrolysis reaction.

Explanation:

The Fischer esterification is a type of organic reaction that involves the conversion of a carboxylic acid and an alcohol into an ester and water, catalyzed by an acid catalyst. This reaction is named after its discoverer, Emil Fischer, a German chemist who first described the reaction in 1895.

The general equation for Fischer esterification is:

Carboxylic acid + Alcohol → Ester + Water

For example, the reaction between acetic acid and ethanol to form ethyl acetate (a commonly used solvent and flavoring agent) can be represented as follows:

CH3COOH + C2H5OH → CH3COOC2H5 + H2O

The Fischer esterification is an important reaction in organic chemistry because esters are important compounds in a variety of applications, including the food industry (as flavorings and fragrances), the pharmaceutical industry (as intermediates in the synthesis of drugs), and the polymer industry (as monomers).

When the reverse reaction of Fischer esterification is promoted by using a base, it is called a hydrolysis reaction. Hydrolysis is the process of breaking down a compound by adding water. In the case of esters, hydrolysis occurs when the ester bond is broken by the addition of water, yielding a carboxylic acid and an alcohol.

The general equation for hydrolysis of an ester is:

Ester + Water → Carboxylic acid + Alcohol

For example, the hydrolysis of ethyl acetate can be represented as follows:

CH3COOC2H5 + H2O → CH3COOH + C2H5OH

Hydrolysis of esters is an important reaction in organic chemistry because it is a common route for the degradation of esters in nature, as well as in many industrial processes where it is used for the production of carboxylic acids and alcohols.

Answer:

448

Explanation:

K =273+°c

K=273+175

K=448

For a 21.2 mL sample of a 0.411 M aqueous hydrofluoric acid solution,  the pH after 17.6 mL of barium hydroxide has been added is mathematically given as

pH=3.332

Generally, the equation for the  mole of HF is mathematically given as

mole of HF=molarity*volume

Therefore

mole of HF=0.361*19.2

mole of HF=6.931mmol

The chemical equation

HF+kOH⇆KF+H2O

Therefore

pH=pKa+log(Kf/HF)

pH=3.15+log(6.931*53.6/53.6*4.558)

pH=3.332

In conclusion, The pH

pH=3.332

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The pressure inside the tire is approximately 1.970796 newtons per square centimeter (N/cm²) when measured in those units.

To convert the pressure from pounds per square inch (psi) to newtons per square centimeter (N/cm²), we need to use the conversion factors between these units.

First, let's convert pounds to newtons:

1 pound = 0.45359237 kilograms

1 kilogram = 9.80665 newtons

Next, let's convert square inches to square centimeters:

1 square inch = 6.4516 square centimeters

Now, we can perform the conversion:

1 psi = (0.45359237 kg) × (9.80665 N/kg) / (6.4516 cm²)

≈ 0.070307 N/cm²

Therefore, the pressure inside the tire of 28.0 psi is approximately equal to 28.0 × 0.070307 N/cm², which is approximately 1.970796 N/cm².

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Explanation:

yup,it is correct:-)

Answer:

the genotype would be 50% Rr and 50% rr

the phenotypes would be 50% Red flower (Rr) and 50% white flower (rr)

Explanation:

Answer:

Your body can cool itself by sweating. When sweat evaporates, it lowers your temperature

Explanation:

The largest effect on the population of trout in Wisconsin was caused by the introduction of non-native species into the ecosystem.

The introduction of non-native species into an ecosystem can cause a disruption in the food chain, leading to a decrease in the population of native species. In Wisconsin, the introduction of non-native species such as the brown trout and rainbow trout has had a significant impact on the population of native brook trout.

The non-native species compete with the native brook trout for food and habitat, which has led to a decrease in the brook trout population. This highlights the importance of preserving the natural balance of ecosystems and avoiding the introduction of non-native species.

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