figure 1 shows the amount of product produced in an enzyme-catalyzed reaction over five minutes. which of the following best explains how the rate of the reaction changes over time?

The molecular formula of the compound which has a molecular weight of 112.124 atomic mass units is C₆H₈O₂.

Molecular formula of any compound tells about the composition and numbers of each entities present in that molecule.

Steps involved in the prediction of molecular formula:

      Molar mass of C₃H₄O = 3(12) + 4(1) + 16 = 56

        112.124/56 = 2

        Molecular formula = (C₃H₄O)₂ = C₆H₈O₂

Hence correct option is (E).

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After 1 half-life, 50% of the parent isotope will be left. After 2 half-lives, only 25% of the parent isotope will remain. After 3 half-lives, only 12.5% of the parent isotope will remain.

Half-life for radioisotopes is the amount of time it takes for half of the original radioactive atoms to decay or disintegrate. It is a constant value unique to each radioactive isotope, and it can range from a fraction of a second to billions of years depending on the isotope. After each half-life, the number of radioactive atoms remaining will be halved.

An example of a radioisotope with a half-life is Carbon-14. Carbon-14 has a half-life of approximately 5,700 years. This means that if you start with 1,000 atoms of Carbon-14, after 5,700 years, you will be left with only 500 atoms. After another 5,700 years (a total of 11,400 years), you will be left with only 250 atoms, and so on.

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Answer:

I don't know what the correct answer is

Explanation:

Answer:

1,69 x10²⁴

Explanation:

Answered it in the comments! ^^

Answer:

The answer is 1:1

Explanation:

The solution to precipitate the barium ion, Ba²⁺, in a water sample is sodium sulfate.

The expected precipitate is BaSO4, or barium sulfate. Barium sulfate is an insoluble salt, which means that when sodium sulfate is added to the water sample, barium sulfate will form and settle out of the solution.

Sodium sulfate reacts with barium ions in the water sample to form the insoluble salt BaSO4 according to the following equation: Ba²⁺ + SO4²⁻ --> BaSO4. Since BaSO4 is insoluble in water, it will settle out of solution.

This process is known as precipitation. Precipitation occurs when a soluble compound is converted to an insoluble one.

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In the hydroboration-oxidation reaction, the nucleophile is borane (BH3), and the reaction is regioselective due to the preference for adding to the less substituted carbon atom of the alkene.

In the given experiment, the nucleophile is the compound or species that donates a pair of electrons to form a new covalent bond with another atom or molecule.

In the context of hydroboration-oxidation, the nucleophile is the boron atom (B) in the reagent BH3 (borane). BH3 acts as a Lewis acid and forms a coordinate covalent bond with the nucleophile, which is typically an alkene.

The reaction is considered regioselective because it exhibits selectivity in the formation of a specific regioisomer. In hydroboration-oxidation reactions, the regioselectivity arises from the nature of the reaction mechanism.

During hydroboration, the boron atom adds to the alkene's least substituted carbon atom, resulting in the formation of an organoborane compound. Subsequent oxidation converts the organoborane to an alcohol.

The regioselectivity is primarily attributed to the preference of the boron atom to add to the carbon atom with fewer alkyl groups attached. This preference is due to the electronic and steric factors involved in the reaction mechanism.

The boron atom acts as an electron-deficient species and is attracted to the electron-rich double bond. However, the steric hindrance caused by the alkyl groups around the double bond influences the selectivity, favoring the addition to the less hindered carbon atom.

Overall, the regioselectivity of the hydroboration-oxidation reaction ensures the formation of the desired regioisomer by selectively adding the boron atom to the less substituted carbon atom of the alkene, leading to the synthesis of the target compound.

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Answer:

They have the same number of electrons as protons.

Explanation:

Atoms are electrically neutral means that all the charges within the atom are balance to equal neutral. An atom has the same number of protons as it does electrons, therefore the charge is neutral.

An ion has a different number of electrons than protons, making the ion either positively or negatively charged.

Answer:

Hi! I am currently taking AP Chemistry, I'll try to help you out.

That quote basically just means that the atom as a whole is not positively or negatively charged. Atoms are made up of protons, neutrons, and electrons. Neutrons are neutrally charged. Protons are positively electrically charged. And electrons are negatively electrically charged. In atoms, if there is an even number of protons and electrons, they can cancel each other's charges out, which results in the atom as a whole being electrically neutral.

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Answer:

39.0

Explanation:

The incompressible assumption is valid for a flow when the Reynolds number is low (Re < 2300) for air and other gases. It is valid for water and other liquids when the Reynolds number is low (Re < 2000).

It is valid for glycerin and other oils when the Reynolds number is low (Re < 100).

Incompressible assumption

For a fluid flow to be considered incompressible, the change in density due to changes in pressure or temperature must be negligible. The fluid is considered to be incompressible if the density changes by less than 5% when the pressure or temperature is varied.

For air, the incompressible assumption is valid for flow velocities less than 2000 feet per minute (fpm) at 20 degrees Celsius. For other gases, the incompressible assumption is valid for velocities less than 100 fpm at the same temperature.

For water, the incompressible assumption is valid for flow velocities less than 3 feet per second (fps) at 20 degrees Celsius. For other liquids, the incompressible assumption is valid for velocities less than 1 fps at the same temperature.

For glycerin and other oils, the incompressible assumption is valid for flow velocities less than 0.2 fps at 20 degrees Celsius.

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Answer:

i think A.

Explanation:

Because the cuvette's walls can vary in breadth, this is the case. If you don't enter it exactly the same way each time, it will change how much light passes through the sample and will have an impact on your results.

The cuvette has a line that must line up with the sample holder's line because of this. hence, readings had no impact.

The cuvette's route length in the spectrophotometer should always stay the same.

This is because the radiation should have a constant path length as it goes through the sample inside the cuvette. By doing this, the cuvette through which the light will travel won't get scratched.

Scratches on the cuvette will result in inaccurate measurements of the concentration or absorbance that is being assessed, producing inaccurate findings.

Therefore, the line on the cuvette is always aligned with that of the sample holder in order to establish a uniform path length and obtain accurate findings.

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The type of conversion that would be required to determine how many liters 26 grams of water is would be a conversion from mass to volume. This is because grams are a unit of mass, while liters are a unit of volume. In order to make this conversion, it is necessary to know the density of water, which is approximately 1 gram per milliliter at room temperature and atmospheric pressure.

To convert 26 grams of water to liters, we need to divide the mass by the density. This gives us:

26 grams / 1 gram per milliliter = 26 milliliters
Since there are 1000 milliliters in a liter, we can further convert this to liters by dividing by 1000:
26 milliliters / 1000 = 0.026 liters

Therefore, 26 grams of water is equivalent to 0.026 liters of water.

In summary, to determine the volume of a given mass of water, we need to use the density of water as a conversion factor. This involves dividing the mass by the density to obtain the volume in milliliters, and then converting this to liters by dividing by 1000.

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Approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

To determine the volume of 0.250 M NaOH required to neutralize 30.4 mL of 0.152 M HCl, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction between NaOH and HCl:

NaOH + HCl -> NaCl + H2O

From the balanced equation, we can see that the stoichiometric ratio between NaOH and HCl is 1:1. This means that for every mole of NaOH, we require an equal number of moles of HCl to neutralize.

First, let's calculate the number of moles of HCl present in the given volume:

Moles of HCl = concentration of HCl * volume of HCl

= 0.152 M * 30.4 mL

= 4.6208 mmol (millimoles)

Since the stoichiometric ratio is 1:1, the number of moles of NaOH required to neutralize the HCl is also 4.6208 mmol.

Now, let's calculate the volume of 0.250 M NaOH needed to contain 4.6208 mmol:

Volume of NaOH = (moles of NaOH) / (concentration of NaOH)

= 4.6208 mmol / 0.250 M

= 18.4832 mL

Therefore, approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

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Answer: The prediction that human population is likely to increase may result in severe problems like global warming, extinction of animals due to human activities, et cetera.

Explanation:

The human population needs resources to survive, they use the resources in such a way that it is being exploited, the trees will be cut in such a large numbers that it will affect the animals depending them.

The human population also uses fossil fuels, burning of which releases harmful gases in the environment.

The usage of technology also comes with the curse of global warming because of release of green house gases such as chlorofluorocarbon.

With an increase in human population, there can be seen many harmful effects on environment.

Answer:

whatttttttttyu[poiuytrtyuiopoiuygtfdfghjkjhgfdfghjk

Explanation:

Answer:

The reason increasing atomic number doesn't always equate to increasing mass is because many atoms don't have the same number of neutrons and protons. In other words, several isotopes of an element may exist

Explanation:

Hope that helps!

The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:

Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)

= 144.12 + 22.22 + 176.00

= 342.34 g/mol

Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:

Number of moles of Kool Aid powder = Mass / Molar mass

= 4.25 g / 342.34 g/mol

≈ 0.0124 mol

Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:

Number of moles of sugar = Mass / Molar mass

= 192.00 g / 342.34 g/mol

≈ 0.5612 mol

Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:

Volume of water = 2.00 quarts * (1.06 liters / 1 quart)

= 2.12 liters

To find the molarity, we use the formula:

Molarity (M) = Number of moles / Volume (in liters)

Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L

≈ 0.286 M

To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.

Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:

(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:

(C M)(V mL) = (0.286 M)(65 mL)

V mL = (0.286 M)(65 mL) / C M

So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

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According to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

It is a procedure that leads to combining and modifying the nuclei of atoms and subatomic particles and appears to violate the law of conservation of mass.

Through this kind of process, the nuclei can be combined or fragmented, absorbing or releasing particles and energy according to each case.

Therefore, we can conclude that according to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

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The mass of the block is 26g whose density is 11.3 g/ml when dropped into a graduated cylinder containing water, and find the volume change is 2.30 ml.

Given the density of lead (d) = 11.3g/mL

The change in volume of water when lead is dropped (V) = 2.30mL

Let the mass of lead block = m

When an object is submerged in a liquid, the volume of the object is removed from the fluid.

We know that from density formula: d = m/V

m = 11.3 x 2.30 = 25.99 ≈ 26g

Hence the mass of required lead block = 26g

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2A+5B→3C is the correct equation of two molecules of one reactant combine with 5 molecules of another to produce 3 molecules of a product.

The five molecules of C are created by the reaction between the two molecules of A and the three molecules of B.

2A + 5B → 3C

Other choices are flawed because,

B = A2 + B5 → C3

One molecule of A2 and one molecule of B3 combine to generate one molecule of C5 in this process.

C = 2A + 3B → 5C

In this reaction, three molecules of C are created when two molecules of A and five molecules of B interact.

D = A2 + B3 → C5

One molecule of A2 and one molecule of B3 combine to form one molecule of C3 in this process.

Complete question:

unless otherwise instructed, you may use the periodic table in the chemistry: problems and solutions book for this question. two molecules of one reactant combine with 5 molecules of another to produce 3 molecules of a product. which equation is the correct representation of the reaction? responses

2A+3B→5C

A2+B5→C3

A2+B3→C5

2A+5B→3C

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can't,........................

Answer:

it is A

Explanation:

because breeding a poodle and golden retriever doesn't make a golden noodles

Answer:

HeyA ❤

Let us consider the mass of oxygen as 1 g.

Mass of lead obtained from yellow oxide = 3.45 g – 0.24 g = 3.21 g

Mass of oxygen = 0.24 g

The mass of lead that combines with 0.24 g of oxygen = 3.21 g

Therefore, mass of lead that combines with 1 g of oxygen = 3.21/ 0.24 = 13.4 g

Mass of lead obtained from brown oxide = 1.227 g – 0.16 g = 1.067

Mass of oxygen = 0.16g

The mass of lead that combines with 0.16 g of oxygen = 1.067 g

Therefore, mass of lead that combines with 1 g of oxygen = 1.067/ 0.16 = 6.66 g

Now, ratio of masses of lead which combines with a fixed mass of oxygen = 13.4 : 6.66

= 2 :1

Thus, masses of lead which combine with the fixed mass of oxygen are in the ratio of (2:1) i.e. small whole numbers.

Hence, the law of multiple proportions is illustrated.

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Answer:

alkaline earth metals

Explanation:

Answer:

Group 2

Explanation:

Strontium (Sr), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table.

Hope this helps

Answer:

Volume of HCl require =  6 mL

Explanation:

Given data:

Volume of HCl require = ?

Molarity of HCl solution = 1.60 M

Volume of NaOH = 48.0 mL

Molarity of NaOH = 0.200 M

Solution:

Formula:

M₁V₁     =      M₂V₂

By putting values,

1.60 M×V₁  =  0.200 M×48.0 mL

V₁  =  0.200 M×48.0 mL/1.60 M

V₁  =  9.6 M .mL /1.60 M

V₁  =  6 mL

Mass of HCI consumed in the reaction 52.6 g.

Given information: Molar mass of HCI = 36.46 g/mol

No of moles of HCI consumed in the reaction = 1.44 moles

We can use the formula for the relationship between moles and mass to calculate the mass of HCI consumed in the reaction.

Mass = No of moles × Molar mass

Thus,Mass of HCI consumed in the reaction = 1.44 mol × 36.46 g/mol= 52.6064 g ≈ 52.6 g

Hence, 52.6 is the required answer in grams consumed of HCI

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Answer:

0.75 atm

Explanation:

To convert from mmHg to atm, divide the value by 760.

570/760=0.7500 atm

1. ₉¹⁹F

2. Mg(OH)₂

3. 2H₂ + O₂ ⇒ 2H₂O

1. Fluorine, atomic number : 9 , mass number = 19

Symbol : ₉¹⁹F

protons=electrons=atomic number = 9

neutrons = mass number - atomic mass

\(\tt n=19-9=10\)

Configuration : [He] 2s² 2p⁵

2. Magnesium hydroxide is an ionic compound and is a strong base consisting of 2 ions:

Positive ion: Magnesium: Mg²⁺

negative ion: Hydroxide: OH⁻

The charges of the two are crossed, so that the compound becomes:

Mg(OH)₂

3. Reaction :

H₂ + O₂ --------> H₂O

give coefficient :

aH₂ + bO₂ --------> H₂O

H, left = 2a, right 2⇒2a=2⇒a=1

O, left = 2b, right 1⇒2b=1⇒b=0.5

Reaction becomes :

H₂ + 0.5O₂ --------> H₂O x 2

2H₂ + O₂ --------> 2H₂O

The process described, which involves sharing power with employees to enhance their confidence and belief in their ability to contribute to the organization, is known as empowerment.

The correct option is A. Empowerment

Empowerment refers to the process of delegating power and authority to employees, granting them the autonomy and decision-making capabilities to perform their jobs effectively. It involves sharing power and responsibility, allowing employees to take ownership of their work and contribute to the organization in a meaningful way. By empowering employees, organizations aim to enhance their confidence, job satisfaction, and motivation, leading to improved performance and productivity.

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