With the aid of a clearly labelled diagram, explain the effect of substrate concentration on the rate of reaction catalysed by an allosteric enzyme

There are vacant orbitals on the phosphorus atom that allows it to expand its octet.

There is a concept that we would need to consider as we are answering the question that we here and that is the idea of the octet rule. The octet rule states that it is only about eight electrons that can be found on the outermost shell of an atom and as such all of the compounds can be formed in obedience to this rule.

Now we should know that there are no vacant d orbitals that are present on the nitrogen atom and this stems from the fact that it does not have a 3d level as such there are no orbitals that can be able to help the Nitrogen atom so as to be able to expand its octet. This is the reason why its pentafluoride can be easily formed.

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The reproduction of hydra is through budding process from its body. This process of regeneration is called mitosis.Mitosis is a type of cell division process. Thus option A is correct.

Mitosis is a cell division process in which one cell produces two identical daughter cells. The term mitosis means the duplication of the genetic material chromosomes with the exact gene information.

Different stages in mitosis together is called mitotic phases. Hydra is an invertebrate freshwater organism. Hydra has a translucent tubular body which can be elongated and contracted.

Hydra is classified to the phylum hydrozoa. It have a regeneratable head. The reproduction of hydra is through budding. A small bud first projects from its tubular body which then develops and emerges out by cell division.

The divided daughter hydra will grow as a matured hydra. This overall budding process takes places through mitosis. Hence, option A is correct.

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The mass of the object that is acted on by a force of 200 N is 100 kg

Mass can be defined as the quantity of matter a body contains.

To calculate the mass of the object, we use the formula below.

Formula:

Where:

From the question,

Substitute these values into equation 1

Hence, the mass of the object is 100 kg.

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Answer:

A. Making decisions that help humans survive

B. Developing technologies that help humans thrive

C. Developing explanations based on facts

E. Gathering facts that explain natural events

Explanation:

The above are examples of the practices of how humans use science.

Science has been of tremendous help to humans in making decisions that make humans survive and develop technologies that help humans thrive. It has helped to gather and develop explanations that are based on facts. It has helped to explain natural events.

Answer:

See explanation

Explanation:

PO4{3-} is phosphate
Sulfite's formula is SO3{2-}
Sulfate is SO4{2-}
OH- is hydroxide
Note: {x±} signifies the charge of the entire molecule

The polyatomic ions in question are phosphite ion, sulfite ion, and sulfate ion.

The formula PO3−4 represents the polyatomic ion called phosphite ion. It is composed of one phosphorus atom bonded to three oxygen atoms. The name of the sulfite ion is SO3−2, and it consists of one sulfur atom bonded to three oxygen atoms. Lastly, the sulfate ion has the formula SO4−2, and it is composed of one sulfur atom bonded to four oxygen atoms.

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Answer:

17. D. Chemical change

18. C. Cell wall

19. D. To transfer matter and energy within and between organisms.

20. A. Transporting materials

21. C. Carbon dioxide

22. A. Cellular respiration

23. C. Produce food and give off oxygen

Explanation:

I have been able to supply the correct answers. The cell wall functions as a structure that provides structural support and protection to the cell. It is tough, flexible and at times rigid. In a chemical change, new materials with new properties are manufactured. So, the process of photosynthesis is a chemical change.

The endoplasmic reticulum actually transports material. It transports materials like protein and lipids made within the cell and sends it to where they are needed.

Carbon dioxide  is the the gas that animals give off and plants use it during photosynthesis. Cellular respiration involves the activities that result to the breaking down of food in order to release energy.

Answer:

The cell potential for the given galvanic cell is 0.188 V.

Explanation:

To calculate the cell potential, we can use the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

where E°cell is the standard cell potential, R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin (25°C = 298 K), n is the number of moles of electrons transferred (in this case, n = 2), F is the Faraday constant (96,485 C/mol), and Q is the reaction quotient.

First, we need to write the half-reactions and their standard reduction potentials:

Sn4+(aq) + 2e- → Sn2+(aq) E°red = 0.15 V

Fe3+(aq) + e- → Fe2+(aq) E°red = 0.77 V

The overall reaction is the sum of the half-reactions:

Sn2+(aq) + 2Fe3+(aq) → Sn4+(aq) + 2Fe2+(aq)

The reaction quotient Q can be expressed as:

Q = [Sn4+][Fe2+]^2 / [Sn2+][Fe3+]^2

Substituting the given concentrations, we get:

Q = (0.00655)(0.01139)^2 / (0.0624)(0.0437)^2 = 0.209

Now we can calculate the cell potential:

Ecell = 0.15 V + 0.0592 V log([Fe2+]^2/[Fe3+]) + 0.0592 V log([Sn4+]/[Sn2+])

= 0.15 V + 0.0592 V log(0.01139^2/0.0437^2) + 0.0592 V log(0.00655/0.0624)

= 0.188 V

Therefore, the cell potential for the given galvanic cell is 0.188 V.

The cell potential for the given galvanic cell in which the given reaction occurs at 25 °C is 0.188 V.

To find the cell potential, we take the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

In which R is the gas constant (8.314 J/mol·K) and E° cell is the standard cell potential.

T temperature in Kelvin (25°C = 298 K), and n is the number of moles of electrons transferred (n = 2), Q is the reaction quotient and F is the Faraday constant (96,485 C/mol).

Firstly, write the half-reactions and then their standard reduction potentials:

Sn⁴⁺(aq) + 2e⁻  → Sn²⁺(aq) E°red = 0.15 V

Fe³⁺(aq) + e⁻ → Fe²⁺(aq) E°red = 0.77 V

The overall reaction is the sum of the half-reactions:

Sn²⁺(aq) + 2Fe³⁺(aq) → Sn⁴⁺(aq) + 2Fe²⁺(aq)

The Q reaction quotient can be written as:

Q = [Sn⁴⁺][Fe²⁺]² ÷ [Sn²⁺][Fe²⁺]²

Substituting the given concentrations, we observe:

Q = (0.00655)(0.01139)² ÷ (0.0624)(0.0437)² = 0.209

Next, we can find the cell potential:

Ecell = 0.15 V + 0.0592 V log([Fe²⁺]²/[Fe³⁺]) + 0.0592 V log([Sn⁴⁺]/[Sn²⁺])

= 0.15 V + 0.0592 V log(0.01139²÷0.0437²) + 0.0592 V log(0.00655÷0.0624)

= 0.188 V

Thus, the cell potential for the given galvanic cell is 0.188 V.

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Answer:

There are 1000 milliliters (ml) in one liter. Therefore, the teacher has a total of 6 x 1000 = 6000 ml of sodium nitrate solution.

Explanation:

To divide the solution evenly among the 24 students, we need to divide the total volume of the solution by the number of students:

6000 ml ÷ 24 students = 250 ml per student

Therefore, each student will receive 250 milliliters of sodium nitrate solution.

Answer:

Answer- 0.25ml

Explanation:

So there are 24 students and 6 liters of Solution.So to evenly distribute

Just divide 6 by 24(6÷24/)... So the answer will be 0.25

Answer:polonium

Explanation:

.........

Answer:

a. is the correct answer

Explanation:

Phosphatidylserine is a type of phospholipid that is mainly found in cell membranes. Its structure is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule.

The fatty acid chains are hydrophobic, meaning they repel water, while the phosphate group and serine molecule are hydrophilic, meaning they attract water.

The glycerol molecule acts as a bridge that connects the two fatty acid chains to the phosphate group and serine molecule.
The structure of phosphatidylserine is important for its function in the cell membrane.

Because of the hydrophobic and hydrophilic components of its structure, phosphatidylserine is able to form a lipid bilayer, which is a barrier that separates the inside of the cell from the outside environment.

The hydrophilic heads of the phosphatidylserine molecules face outward and interact with water, while the hydrophobic tails face inward and repel water.
Phosphatidylserine also plays a role in cell signaling and apoptosis, which is programmed cell death.

It acts as a signaling molecule by binding to proteins that are involved in cellular pathways.

In addition, phosphatidylserine is translocated to the outer leaflet of the cell membrane during apoptosis, which signals to immune cells that the cell is ready to be removed.
In conclusion, the structure of phosphatidylserine is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule. Its hydrophobic and hydrophilic components allow it to form a lipid bilayer in cell membranes, and it also plays a role in cell signaling and apoptosis.

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Answer:

A little atom will leave a big hole and a big atom cant travel that fast

Explanation:

According to the question the reaction enthalpy is thus 10610 J / 0.278 moles = 38.3 kJ/mol.

Enthalpy is a thermodynamic property of a system that measures the total energy content of a system. It is a state function that is expressed in terms of internal energy, pressure, and volume of a system. Enthalpy represents the amount of energy that is associated with a chemical reaction or physical change.

The reaction is exothermic, meaning that heat is released during the reaction. The amount of heat released can be calculated with the equation q = mcΔT, where q is the heat released, m is the mass of the solution, c is the specific heat capacity of the solution, and ΔT is the change in temperature of the solution. Using the given data, the amount of heat released by the reaction can be calculated as q = (250 g)(4.184 J/g-K)(11.1 K) = 10610 J. The enthalpy change for the reaction can then be calculated by dividing the heat released by the number of moles of NaOH, which is 11.1 g / 40.00 g/mol = 0.278 moles. The reaction enthalpy is thus 10610 J / 0.278 moles = 38.3 kJ/mol.

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Pressure of the gas inside the container is 662.59 torr.

The ideal gas law (PV = nRT) connects the macroscopic characteristics of ideal gases. An ideal gas is one in which the particles are both non-repellent and non-attractive to one another (have no volume).

The general law of ideal gas can be applied here: PV is equal to nRT, where P is the gas pressure in atm.

V is the number of moles of the gas in a mole, and n is the volume of the gas in L. R is the universal gas constant. T is the temperature(Kelvin) of the gas.

If P and T are different values and n and V are constants, then

(P₁T₂) = (P₂T₁).

P₁ = 735 torr, T₁ = 29°C + 273 = 302 K,

P₂ = ??? torr, ​T₂ = 62°C + 273 = 335 K.

∴ P₂ = (P₁T₂)/(P₁) = (735 torr)(302 K)/(335 K) = 662.59 torr.

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The 5 moles of water is equal to 90.075 grams of water and 220 J of energy is equal to 52.636 calories.

To change moles of water to grams, it is required to find the molar mass of the substance. The molar mass of water (H2O) is equal to 18.015 grams/mol.

To change 5 moles of water to grams, by using the following calculation:

5 moles × 18.015 grams/mol = 90.075 grams of water

Thus, 5 moles of water is equal to 90.075 grams of water.

To change joules to calories,  by using the conversion factor:

1 cal = 4.184 J.

To change 220 J of energy to calories, by using the following calculation:

220 J ×  (1 cal / 4.184 J) = 52.636 cal

Thus, 220 J of energy is equal to 52.636 calories.

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The mass of carbon dioxide produced by the complete combustion of 48.0g of hexane is 147.35g.

The mass of a substance can be calculated by using the stoichiometry approach.

The balanced equation of the complete combustion of hexane is as follows:

2C6H14(g) + 19O2(g) → 12CO2(g) + 14H2O(g)

48g of hexane to moles is calculated as:

48g ÷ 86g/mol = 0.56 mol

2 moles of hexane produces 12 moles of CO2

0.56 mol of hexane will produce 0.56 × 12/2 = 3.35 mol

Next, we convert 3.35 moles of CO2 to mass as follows:

3.35 moles × 44g/mol = 147.35g

Therefore, the mass of carbon dioxide produced by the complete combustion of 48.0g of hexane is 147.35g.

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The volume of the base NaOH in the reaction is determined as 28.5 mL.

The balanced equation for the reaction between NaOH and H₂SO₄ is given as;

2NaOH + H₂SO₄ ----> Na₂SO₄ + 2H₂O

From the balanced chemical equation, the number of moles of acid in the reaction is calculated as follows;

n = 0.012 L x 0.132

n = 0.00158

The equivalent number of moles of the base is calculated as follows;

n_b = 2 x 0.00158

n_b = 0.00316

The volume of the base in the reaction is calculated as follows;

V_b = 0.00316 moles / 0.111 M

V_b = 28.5 mL.

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To calculate the heat gained by the cold liquid, we need to use the formula: q = m * c * ΔT

where q is the heat gained or lost by the substance, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature of the substance.

Let's assume that we have a cold liquid with a mass of 100 grams and an initial temperature of 10°C. We then add 50 grams of a hot solid that has been heated to 80°C. After the solid and liquid are allowed to equilibrate, the final temperature of the mixture is 20°C.

We can first calculate the heat lost by the hot solid using the same formula:

q = m * c * ΔT

q = 50 g * 0.385 J/g°C * (80°C - 20°C)

q = 15400 J

The negative sign indicates that the solid lost heat to the colder liquid.

To calculate the heat gained by the cold liquid, we can use the same formula and the final temperature of the mixture:

q = m * c * ΔT

q = 100 g * 4.184 J/g°C * (20°C - 10°C)

q = 4184 J

Therefore, the heat gained by the cold liquid is 4184 J.

The complete question is :

Use the equation qliquid = m × c × ΔT to calculate the heat gained by the cold liquid. Use the specific heat for the liquid you selected.

Use the equation qwater = m × c × ΔT to calculate the heat lost by the hot water. Show your work using the problem-solving method shown in previous rubrics.

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Explanation:

Hope it helps...

Answer:

H2o,hydrogen,carbonoxide

Answer:

bent

Explanation:

The final value for the enthalpy change of the formation of CO2 and 2H2O from their elements (C, H2, and O2) would be -1410 kJ per mole of CO2 and 2 moles of H2O formed.

The enthalpy change (ΔH) for the reaction CO2 + 2H2O → H2CO3 can be calculated by multiplying the stoichiometric coefficients of the balanced equation by the enthalpy values of the corresponding compounds involved in the reaction.

In the given reaction, the enthalpy change is -1410 kJ. However, it's important to note that this enthalpy change corresponds to a specific reaction and may not directly apply to the formation of CO2 and 2H2O from another reaction or process.

If we assume that the reaction is the formation of one mole of CO2 and two moles of H2O, we can say that the enthalpy change for this specific formation reaction is -1410 kJ.

Therefore, the final value for the enthalpy change of the formation of CO2 and 2H2O from their elements (C, H2, and O2) would be -1410 kJ per mole of CO2 and 2 moles of H2O formed.

It's worth mentioning that the enthalpy change can vary depending on the specific conditions (temperature, pressure, etc.) and the reactants involved in the reaction. Therefore, it's crucial to specify the conditions and reaction context when referring to enthalpy values.

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Answer: Approximately 69.5 grams of gold (Au).

Explanation:

mol = mass / molar mass

We are already given the moles of gold, 0.353. Looking at a periodic table, we cna bserve that the approximate molar mass of gold is 196.97 (I got this from ptable.com).

Plugging this into the formula above, it will look like this:

0.353 mol Au = mass / (196.97 g/mol)       (in any science class, do not forget about writing your units)

To get mass by itself, multiply both sides of the equation by 196.97 g/mol.

This yields that the mass is equal to 69.5 grams. As you can see, the units of "mol" cancel out: 0.353 mol AU * (196.97 g/mol)

The reason why I rounded my answer to 69.5 grams instead of, let's say, 69.5304, is because of a concept in science referred to as significant figures. In this case, the amount of significant figures we need to round our answer to is seen in the provided value in the problem. 0.353 has only three significant figures so I have rounded the final answer to three significant figures.

Remember, do not forget to not only unclude e units that answer should be in but some teachers also request that you write the symbol of the elemnt you are writing about, so I would write my answer as: 69.5 g Au.

I hope this helps :) have a nice day!

Scientists cannot pinpoint the changes or variations in the results to a single source when more than one variable is altered during an experiment. The outcomes can be attributed to the independent variable directly by examining and modifying each variable separately.

You can evaluate the outcomes of your experiment to determine how much one adjustment impacted the outcome by testing just one variable at a time. You won't be able to identify the variable that caused the outcome if you're testing two variables simultaneously. A controlled variable is one that is kept constant with the goal of not affecting how an experiment turns out. Controlling any factors that can affect an experiment's outcomes allows us to be certain that the altered variable is what caused our results.

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Answer:

Sodium hydrogen sulphite

Explanation:

The white precipitate formed is because of the sulphite ion and a carbonyl group formed

\(.\)

The presence of large bodies of water helps to stabilize temperature changes in coastal areas.

Water has a high specific heat capacity due to the presence of hydrogen bonding between its molecules. Hydrogen bonding occurs when the positively charged hydrogen atom of one water molecule is attracted to the negatively charged oxygen atom of another water molecule. This bonding is stronger than the typical intermolecular forces found in other substances.

Hydrogen bonding in water requires a significant amount of energy to break, which leads to the high specific heat capacity of water. This means that water can absorb and store a substantial amount of heat energy without a significant increase in temperature. Conversely, when water loses heat, it releases a significant amount of energy before its temperature decreases.

In coastal areas and regions near large bodies of water, the high specific heat capacity of water plays a crucial role in moderating climates. Water acts as a heat sink, absorbing heat during the day and releasing it at night. This leads to milder temperature fluctuations compared to inland areas, which have lower specific heat capacities. As a result, coastal regions experience cooler summers and warmer winters, providing a more moderate climate overall.

The presence of large bodies of water helps to stabilize temperature changes in coastal areas, providing a buffering effect and contributing to the moderation of the climate.

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Powerful Electrolytes:

HCl, NaOH, HNO3

Weak electrolyte:

HF, HC2H3O2

• Non-electrolytes:

C2H5OH, C6H12O6

Further explanation

An electrolyte solution is a substance that produces ions when dissolved in water and can conduct electricity.

Strong electrolytes are the solution

Solutes have the strongest electrical conductivity because they are completely ionized when dissolved in water.

• Weak electrolytes are partially ionized solutions with low electrical conductivity.

• Non-electrolytes are solutions that cannot conduct electricity because the solute cannot form ions. One of the most important properties of water is its ability to dissolve various substances. Solutions in which water is actually the dissolution medium are called aqueous solutions. Water is the most important solvent for electrolytes.

HCl = hydrochloric acid, a strong acid.

HNO3 = nitric acid, strong acid

• NaOH = sodium hydroxide, a strong base

HF = hydrofluoric acid, a weak acid

HC2H3O2 or CH3COOH = acetic acid, a weak acid

C2H5OH = ethanol, non-electrolyte

C6H12O6 = glucose, non-electrolyte

remarks:

• Some acids are fully ionized in water, while others are partially ionized. Not all acids are equally strong in generating H+ ions in solution. When an acid is fully ionized it is a strong acid. Click here when passing through hydrogen chloride

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Answer:

An heater, Oven, sun, and fireplaces

Chose which ever you want

The identification of the unidentified C6H4O2 could be made using the following chemical molecules.

Given that (m) = 0.315 g, the mass of the unknown chemical compound.

The sole elements in the compound are carbon, hydrogen, and oxygen, and it completely burns.

CO2 generated mass (m1) = 0.771g

H2O generated mass (m2) = 0.105g

The organic compound (M) has a molar mass of 108g/mol.

The first thing we determine is the mass of the carbon, hydrogen, and oxygen in the supplied compounds. The chemical's empirical formula is then determined further. Using the empirical formula, we can determine the chemical from the given molar mass.

Molar mass/Molar mass of CO2 x mass of CO2 =  12/44x0.771

Mass of carbon in organic molecule (M1) = 0.2103g

The mass of hydrogen (M2) is equal to = 2/18x0.105, or= 0.012g.

oxygen mass (M3) is equal to = 0.315 - (0.2103 + 0.012) = 0.0927g.

Carbon moles equal = 0.2103/12 or 0.018.

1 mole of hydrogen is equal to = 0.012 moles.

Mole of oxygen is equal to = 0.0927/16, or 0.006.

n = Molecular formula/empirical formula = 108/54 = 2 is the resulting empirical formula.

C6H4O2 is the necessary organic molecule.

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complete question: An unknown organic compound (0.315 g) containing only c, h, and o produces 0.771 of co2 and 0.105 g of h2o when it undergoes complete combustion. the approximate molar mass is 108 g/mol. which of the following compounds could be the identification of the unknown? group of answer choices. A) Benzyl alcohol, C6H5CH2OH B) CH3C6H4OH C) 1,2-Benzoquinone, C6H4O2

I apologize of I'm wrong but its probably OA

Sorry once again!

~wise rat

Answer: C.

Explanation:

gasoline evaporating into the air

Therefore, the empirical formula of the compound if a sample contains 5.28 grams of Sn and 3.37 grams of F is SnF4 S n F 4 .

The simplest whole number ratio of atoms in a molecule is its empirical formula in chemistry. The empirical formula of sulfur monoxide, or SO, and disulfur dioxide, or S2O2, are two straightforward examples of this idea. As a result, both the sulfur and oxygen compounds sulfur monoxide and disulfur dioxide share the same empirical formula. However, their molecular formulae, which describe the number of atoms in each molecule of a chemical compound, are different.

The configuration or quantity of atoms are not mentioned in an empirical formula. It is typical for many macromolecules like silicon dioxide and ionic chemicals like calcium chloride (CaCl2) (SiO2).

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