In the SN1 reaction of 2-chloro-2-methylpropane with water at different temperatures, the following reaction rate constants were obtained: 17°C, 0. 0052 s-1; 30°C, 0. 0202 s-1; 42°C, 0. 0608 s-1. Calculate the half-life of this reaction at 36°C. In seconds

Answer:

23.6°C

Explanation:

use delta h method

Out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

When measuring data, precision and accuracy are two crucial considerations. Both precision and accuracy indicate how closely a measurement comes to the real value.

But accuracy also indicates how closely a measurement resembles a known or recognized value, while precision indicates how repeatable a measurement is, even if it is far from the acceptable value. Out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

Therefore, out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

To learn more about precision and accuracy, here:

https://brainly.com/question/28289139

#SPJ1

Explanation:

Volume = mass ÷ density

             =  116 g  ÷  0.925 g/mL

             =  125.41 mL

The incompatibility between warfarin and phytonadione is chemical, as they have opposite effects on blood clotting.

Warfarin is a blood thinner that inhibits the synthesis of vitamin K-dependent clotting factors, while phytonadione (also known as vitamin K1) is a clotting factor that reverses the effects of warfarin. However, this chemical incompatibility can have therapeutic benefits in certain situations, such as when a patient on warfarin experiences excessive bleeding and needs an antidote to reverse the blood-thinning effects.

The antagonism between warfarin and phytonadione represents a therapeutic incompatibility. Warfarin is an anticoagulant that works by inhibiting the synthesis of clotting factors, while phytonadione (vitamin K) is essential for the production of these factors. Thus, they have opposing effects in the body.

To know more about body click here

brainly.com/question/15803339

#SPJ1

Answer:

d

Explanation:

Draw the Lewis dot structure for each atom of the compound to show how many valence electrons are present in each atom. For example, the calcium atom in calcium chloride, CaCl2, has two valence electrons, and the chlorine atoms have seven valence electrons each.

The integumentary system functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature. Cell membrane performs the same function as the integumentary system. Therefore, option A is correct.

The cell membrane performs a function that is similar to the integumentary system. The cell membrane is a thin, flexible layer that surrounds the cell and acts as a barrier between the cell and its external environment.

It helps to regulate the movement of substances in and out of the cell, maintain the balance of fluids and electrolytes, and protect the cell from harmful substances.

The cell membrane can also play a role in temperature regulation, as it helps to maintain the proper internal environment of the cell.

Thus, option A is correct.

To learn more about the cell membrane, follow the link:

https://brainly.com/question/13524386

#SPJ3

Answer:

Hydroxyl

Explanation:

A P E X

Answer:

Ice wedging

Explanation:

The rocks crack fill with water and then expand

Answer:

You use the fact that 1 mole of any substance contains exactly 6.022⋅1023 atoms or molecules of that substance - this is known as Avogadro's number. In your case, 1 mole of gold will have exactly 6.022⋅1023 atoms of gold.

Explanation:

Complete the table to show the fraction of a radioisotope left after each half-life has passed:

Number of half-lives 0 1 2 3 4 5 6

Fraction remaining 1 1/2 1/4 1/8 1/16 1/32 1/64

Use the table above to help you answer the questions below:

a) After 5 half-lives, the fraction remaining is 1/32 or 0.03125. To find the percentage remaining, multiply by 100:

0.03125 x 100 = 3.125%

Therefore, after 5 half-lives, 3.125% of the sample will remain.

b) After 4 half-lives, the fraction remaining is 1/16 or 0.0625.

c) To find out how many half-lives it will take for 25% of a sample to remain, you can set up an equation:

\((1/2)^{(n)} = 0.25\)

where n is the number of half-lives.

Taking the logarithm of both sides gives:

n x log(1/2) = log(0.25)

n = log(0.25) / log(1/2)

n = 2.

Therefore, it will take 2 half-lives for 25% of the sample to remain.

d) After 3 half-lives, the fraction remaining is 1/8 or 0.125. To find the percentage remaining, multiply by 100:

0.125 x 100 = 12.5%

Therefore, after 3 half-lives, 12.5% of the sample will remain.

e) The fraction remaining after 8 half-lives is \((1/2)^8\), which simplifies to 1/256.

The half-life of iodine-131 is 10 days.

After 30 days, three half-lives have passed:

\((1/2)^3 = 1/8\)

Therefore, after 30 days, 1/8 or 0.125 of the original mass will remain:

0.125 x 15g = 1.875g

learn more about half-life here

https://brainly.com/question/1160651

#SPJ1

The substance that is usually one of the limiting amino acids in foods, particularly those of plant origin, can vary depending on the specific food. However, common limiting amino acids in plant-based foods include methionine and lysine. Therefore, option c, methionine, is likely the correct answer to your question.

Methionine (c) is usually one of the limiting amino acids in foods, particularly those of plant origin. Limiting amino acids are those that are present in the lowest quantity relative to the body's requirements, and they can limit the utilization of other amino acids in protein synthesis.

Learn more about limiting amino acids at https://brainly.com/question/15025390

#SPJ11

Answer:

1527580000 (I think if I did it right sorry if I didn't)

Explanation:

When converting cm to m. 1 centimeter is 0.01 Meters. That explanation probably doesn't help at all but I hope this is right and if not I do apologise!

It would take approximately 108,800 seconds to produce 8.00 g of aluminum metal from the electrolysis of molten AlCl₃ with an electrical current of 15.0 A.

To calculate the time required, we need to use Faraday's law, which states that the amount of substance produced by an electrolysis reaction is directly proportional to the amount of charge that passes through the cell. The equation for Faraday's law is:

moles of substance = (electric charge) / (Faraday's constant)

where the Faraday's constant is the amount of electric charge per mole of electrons, and its value is 9.6485 x 10⁴ C/mol.

We can use the molar mass of aluminum (26.98 g/mol) to convert the moles of aluminum produced to grams. We can also use the current (I) and time (t) to calculate the amount of electric charge (Q) that passes through the cell, using the equation:

Q = It

Putting it all together, we get:

moles of Al = (It) / (Faraday's constant)

grams of Al = (moles of Al) x (molar mass of Al)

Solving for time (t), we get:

t = (grams of Al x Faraday's constant) / (molar mass of Al x I)

Plugging in the given values, we get:

t = (8.00 g x 9.6485 x 10⁴ C/mol) / (26.98 g/mol x 15.0 A) = 108,800 s

learn more about Faraday law here:

https://brainly.com/question/1640558

#SPJ11

The gas constant is equal to R=8.314 J/mol K, while the atomic mass of helium is equal to M=4.0 g/mol. M = 4.0 g / m o l . As a result, the helium atom's rms speed is 1304.7 m/s. So, 515 m/sec is the root-mean-square speed.

The value of the square root of the sum of the squares of the stacking velocity values divided by the quantity of values is the root-mean square (RMS) velocity. The RMS velocity is the speed of a wave traveling along a certain ray path across subsurface strata with various interval velocities.

The expression v=sqrt(3RTM) and v=sqrt(3KTm), where R is the universal gas constant, T is the absolute (Kelvin) temperature, m is the molar mass, K is the Boltzmann's constant, and M is the molecular mass, gives the root mean square (R.M.S.) speed V of the molecules of an ideal gas.

Since the particles in a typical gas sample are flowing in all directions, the average velocity for that sample is zero, which is why we use the rms velocity instead of the average. This is an important formula since the particle velocity controls both the diffusion and effusion rates.

To know more about root mean square velocity refer to:

https://brainly.com/question/15995507

#SPJ13

Answer:1. 5

Explanation: the element is boron and the atomic number is 5

Water molecules are held to one another by hydrogen bonding.

The oxygen atom has a slightly negative charge, and the hydrogen atoms have a slightly positive charge, making water molecules polar, or having an unequal distribution of electrons. This polarity enables a hydrogen bond to form between two neighboring water molecules by attracting the hydrogen atoms of one water molecule to the oxygen atom of the latter. Although each of these bonds is weak, they are strong enough to hold the molecules of water together, giving the water its cohesive qualities. Additionally, hydrogen bonding explains why water has a low surface tension and a high boiling temperature, and why ice floats on water.

To know more about hydrogen bonding, here

brainly.com/question/30885458

#SPJ1

Answer:

13400 millimeters.

Explanation:

Multiply the volume value by 1e+6

Answer:

All cells contain specialized, subcellular structures that are adapted to keep the cell alive. Some of these structures release energy, while others produce proteins, transport substances, and control cellular activities. Collectively, these structures are called organelles.Plant and animal cells both contain organelles, many of which are found in both types of cells. However, there are some organelles (such as chloroplasts, the cell wall, and large vacuoles) that are only found in plant cells.

Explanation:

hope this helps

The Lewis structure of PF3Cl2 consists of a central phosphorus atom bonded to three fluorine atoms and two chlorine atoms.

Lewis structures are used to visualize the bonding and electron distribution in molecules. They are based on the concept of valence electrons, which are the outermost electrons involved in chemical bonding. In the case of PF3Cl2, we determine the Lewis structure by considering the valence electrons of each atom.

To draw the Lewis structure for PF3Cl2, we need to consider the valence electrons of each element. Phosphorus (P) is in Group 5A and has 5 valence electrons. Fluorine (F) is in Group 7A and has 7 valence electrons, while chlorine (Cl) is in Group 7A and also has 7 valence electrons.

Starting with phosphorus, we place the central atom in the middle and surround it with the other atoms. We connect the phosphorus atom to three fluorine atoms (F) and two chlorine atoms (Cl) using single bonds. This arrangement ensures that each atom follows the octet rule, meaning they have a full valence shell of 8 electrons.

The Lewis structure for PF3Cl2 can be represented as follows:

  F

  |

Cl-P-Cl

  |

  F

In this structure, the central phosphorus (P) atom is bonded to three fluorine (F) atoms and two chlorine (Cl) atoms. Each bond is represented by a line, and lone pairs of electrons on each atom are not shown in this structure.

Overall, the Lewis structure provides a simplified representation of the molecular structure of PF3Cl2, allowing us to understand the arrangement of atoms and their bonding pattern.

To learn more about lewis structure - brainly.com/question/29634713

#SPJ11

The synthesis of silver nanoparticles can involve various methods and conditions, but a general order of steps in a typical synthesis process might be as follows:

Preparation of the silver precursor: Silver nitrate (AgNO3) is commonly used as a silver precursor. It is dissolved in water or other suitable solvents to prepare a silver precursor solution.

Preparation of the reducing agent: A reducing agent, such as sodium borohydride (NaBH4) or sodium citrate, is prepared separately. The reducing agent will react with the silver precursor to form silver nanoparticles.

Mixing the silver precursor and reducing agent: The silver precursor solution and the reducing agent solution are mixed together under suitable conditions, such as controlled temperature and stirring, to allow the reduction reaction to occur.

To know more about  silver nanoparticles here

https://brainly.com/question/16055011

#SPJ4

Answer:

They forge heavy elements in their cores, explode as supernovas, and expel these elements into space.

Explanation:

Answer: the answewr is A. hope this helps!

Explanation:

Answer:

Complete ionic: 2Cr(3+) + 6(NO3)- + 3Ba = 2Cr + 3Ba(2+) + 6(NO3)-

Net ionic; 2Cr(3+) + 3Ba = 2Cr + 3Ba(2+)

Explanation:

We are given;

Cr(NO3)3 (aq) + Ba (s)

Let's first find the product of this reaction before getting the complete and net ionic equations.

2Cr(NO3)3 + 3Ba = 2Cr + 3Ba(NO3)2

The complete ionic equation will be;

2Cr(3+) + 6(NO3)- + 3Ba = 2Cr + 3Ba(2+) + 6(NO3)-

The net ionic equation is gotten by eliminating the spectator ions from both left and right hand sides of the equation.

Thus, net ionic equation is;

2Cr(3+) + 3Ba = 2Cr + 3Ba(2+)

There are approximately 5.02 grams of avobenzone present in the bottle of sunscreen.

To determine the number of grams of avobenzone present in the sunscreen bottle, we need to use the mass/volume percentage (m/v) and the volume of the sunscreen.

Given:

Volume of sunscreen = 251 mL

Avobenzone concentration = 2.0% (m/v)

To find the mass of avobenzone, we can use the formula:

Mass = (Concentration × Volume) / 100

Plugging in the values:

Mass = (2.0 × 251) / 100

Mass = 5.02 grams

To calculate the mass of avobenzone, we would need information about the formulation of the sunscreen or the specific concentration or mass of avobenzone it contains. Once you provide that information, I will be able to assist you in calculating the grams of avobenzone present.

Learn more about avobenzone here:

https://brainly.com/question/31844428

#SPJ11

To calculate the number of oxygen atoms in 52.06g of carbon dioxide, you will first need to determine the number of moles of carbon dioxide in the given mass, and then use the mole ratio between carbon dioxide and oxygen atoms to find the number of oxygen atoms.

Here's how to do it:

\text{moles of CO}_2=\frac{\text{mass of CO}_2}{\text{molar mass of CO}_2}

The molar mass of carbon dioxide (\text{CO}_2) is calculated by adding the atomic mass of carbon (12.01 g/mol) to two times the atomic mass of oxygen (2 x 16.00 g/mol) to get a molar mass of 44.01 g/mol.

Therefore,\text{moles of CO}_2=\frac{52.06\text{ g}}{44.01\text{ g/mol}}=1.182\text{ mol}

2. There are two oxygen atoms in each molecule of carbon dioxide, so for every 1 mole of \text{CO}_2 there are 2 moles of oxygen atoms.

To know more about atoms visit:

https://brainly.com/question/1566330

#SPJ11

The diffusion coefficient is 4.39x10-12 m2/s.

Given information;

Initial nitrogen concentration, c₀ = 0.08 wt %

Nitrogen concentration to be achieved, cₙ = 0.52 wt %

Diffusion coefficient, D = 9.10E-05 m²/s

Temperature, T = 1100 K

Activation energy, Qd = 168 kJ/mol

Gas constant, R = 8.31 J/mol K

To find;

Diffusion coefficient at 1100 K using Arrhenius equation;

The Arrhenius equation for diffusion coefficient is given as;

D = D₀ exp(-Qd / R T)

where; D₀ is the diffusion coefficient at an infinite temperature.

Substituting the given values of D, Qd, R, and T into the equation above;

D = 9.10E-05 m²/s

Qd = 168 kJ/mol

R = 8.31 J/mol

KT = 1100 K

At 1100 K, the value of kT is;

kT = R T

     = 8.31 J/mol K x 1100 K

     = 9141 J/mol

Multiplying by Avogadro's number to get the value in J;

9141 J/mol x (6.022 x 10²³) / (1 mol) = 5.50 x 10²⁹ J-1

                                                          = 5.50 x 10²⁹ m²/kg

Multiplying by the Boltzmann constant to get the value in m²/s;

K = 1.38 x 10⁻²³ J/KD₀ can now be obtained by rearranging the Arrhenius equation as;

D₀ = D / exp(-Qd / R T)

Substituting the values into the equation;

D₀ = 9.10E-05 m²/s / exp(-168 x 10³ J/mol / 8.31 J/mol K x 1100 K)D₀

     = 9.10E-05 m²/s / exp(-21.36)D₀

     = 9.10E-05 m²/s / 1.29E-09D₀

     = 7.05E-04 m²/s

Therefore, the diffusion coefficient at 1,100 K if k = 8.31 is;

D = D₀ exp(-Qd / R T)D

   = 7.05E-04 m²/s exp(-Qd / R T)D

   = 7.05E-04 m²/s exp(-168 x 10³ J/mol / 8.31 J/mol K x 1100 K)

D = 7.05E-04 m²/s exp(-21.36)D

   = 4.39 x 10⁻¹² m²/s

Therefore, the correct option is 4.39x10-12 m2/s.

Learn more about Concentration from the given link :

https://brainly.com/question/17206790

#SPJ11