the second-order rate constant for the decomposition of clo is 6.33×109 m–1s–1 at a particular temperature. determine the half-life of clo when its initial concentration is 1.61×10-8 m .

Answer:

0.241 M

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

HBr + NaOH —> NaBr + H₂O

From the balanced equation above,

The mole ratio of acid, HBr (nₐ) = 1

The mole ratio of base, NaOH (n₆) = 1

Finally, we shall determine the concentration of the NaOH solution. This can be obtained as follow:

Volume of base, NaOH (V₆) = 20 mL

Volume of acid, HBr (Vₐ) = 24.1 mL

Concentration of acid, HBr (Cₐ) = 0.2 M

Concentration of base, NaOH (C₆) =?

CₐVₐ / C₆V₆ = nₐ/n₆

0.2 × 24.1 / C₆ × 20 = 1/1

4.82 / C₆ × 20 = 1

Cross multiply

C₆ × 20 = 4.82

Divide both side by 20

C₆ = 4.82 / 20

C₆ = 0.241 M

Therefore, the concentration of the NaOH solution is 0.241 M

Answer:

false

Explanation:

Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\ \)

From the question

mass of rock = 16 g

density = 4 g/mL

The volume of the rock is

\(volume = \frac{16}{4} \\ \)

We have the final answer as

Hope this helps you

Answer:

well there combined net force is 145N so the rock will go up and they will have 5 N to spare

Explanation:

The number of grams of iron present in 14.79 cm length of the same iron rod is 640.51 g.

Ounces is a unit of mass which is used to define a very little amount of anything.

In the question, given that:

In one inch of iron rod whose weighs is 3.88 ounces = 2.54 cm long

In 1 g = 0.035273 ounces present

So we can calcuylate the number of grams in which 3.88 ounces present as:
x = (3.88 ounces) / (0.035273 ounces/g)

x = 110g

So, in 110g = 3.88 ounces present

And in 2.54 cm = 110g of iron present

In 14.79 cm, present grams of iron can be calculated as:

y = (14.79cm x 110g) / 2.54cm

y = 640.51 g

Hence option (c) is correct i.e. 640.51 g.

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The weight of the iron rod with 14.79 cm length with same density is given by: Option C; 640.51 g

Suppose that a finite amount of substance is there having its properties as:

Then, they are related as:

\(d = \dfrac{m}{v}\)

We know that:

Now, from the facts given in the problem, we have:

The weight of first iron rod which is one inches long = 3.88 ounces

The new rod is 14.79 cm long. And 1 cm = 0.3937 inches approx, thus the new rod is: \(14.79 \times 0.3937 \approx 5.8228 \: \rm inches\)

As for 1 inch long rod, there is  weight of 3.88 ounces, thus:

for 5.8228 inch rod, the weight of the rod would be \(5.8228 \times 3.88 \approx 22.5924 \: \rm ounces\)

And since 1 ounce = 28.3495 g approx

Thus, weight of the new rod in grams would be \(22.5924\times 28.3495 \approx 640.485 \approx 640.51\: \rm g\)

Thus, the weight of the iron rod with 14.79 cm length with same density is given by: Option C; 640.51 g

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Answer:

The answer is 2 all you do is divide the 6.02 and 3.01 and you get 2

The following statement that incorrectly describes mechanisms of CO2 transport is "7-10% of CO2 is dissolved directly into the plasma as bicarbonate ions in plasma."

The transport of carbon dioxide in the blood is done in three ways which are:

Dissolved CO2 Carbaminohaemoglobin Bicarbonate ions in the plasma

Dissolved CO2: This is the smallest fraction of carbon dioxide carried by the blood. Dissolved CO2 combines with water in the blood to form carbonic acid (H2CO3). This reaction is facilitated by an enzyme known as carbonic anhydrase. Carbonic acid dissociates to form H+ and bicarbonate ions (HCO3-).

Carbaminohaemoglobin: Just like oxygen, carbon dioxide can also bind with hemoglobin. Carbon dioxide binds with hemoglobin to form carbaminohaemoglobin. Carbaminohaemoglobin accounts for about 20% of the carbon dioxide transported by the blood.

Bicarbonate ions in the plasma: This is the largest fraction of carbon dioxide transported by the blood. Carbon dioxide diffuses from the tissues into the blood where it combines with water to form carbonic acid. Carbonic acid dissociates to form H+ and bicarbonate ions (HCO3-). The bicarbonate ions diffuse into the plasma where they are transported to the lungs. In the lungs, the bicarbonate ions diffuse back into the red blood cells. The bicarbonate ions are converted back to carbon dioxide, which is then exhaled.

The statement that incorrectly describes mechanisms of CO2 transport is "7-10% of CO2 is dissolved directly into the plasma as bicarbonate ions in plasma." This is incorrect because about 70% of CO2 is transported as bicarbonate ions, not 7-10%. Therefore, the statement is false.

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The mistake in the question's descriptions concerning CO2 transport involves the part of hemoglobin that carbaminohemoglobin binds to (it's the globin part, not the heme part), and the proportion of CO2 carried as bicarbonate ions in the plasma (it's about 70%, not 7-10%).

The mechanisms described here for the transport of CO2 in the body are partially incorrect. In the human body, around 20% of CO2 is indeed transported as carbaminohemoglobin, but it binds to the globin part, not the heme part, of the hemoglobin protein. Additionally, the primary way that CO2 is transported is as bicarbonate ions, but these bicarbonate ions constitute around 70%, not 7-10%, of the CO2 carried in the plasma. Therefore, the incorrect descriptions mentioned in the question are that carbaminohemoglobin binds to the heme part of hemoglobin and that only 7-10% of CO2 is carried as bicarbonate ions in the plasma.

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I’m sorry no one helped you with those questions. But could you please be a doll and give me the answer for the multiple-choice questions 1-15. Pleaseee I’m so desperate.?

Valence electrons are described as the electrons that are located in the outermost shell of the atom.

Valence electrons are defined as the electrons which occupy the outermost shell or highest energy level of an atom while core electrons are those occupying the innermost shell or lowest energy levels.

Let's consider an example where, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. You can write the configuration of oxygen's valence electrons as 2s²2p⁴. Generally, a single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom.

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Answer: np

Explanation:

Correctly matched are :

A landslide is also called a land slip. It refers to several forms of mass wasting and may include a wide range of ground movements. They occur in a variety of environments characterize by gentle and steep slope gradients.

The mudflow is a mixture of rocks and soil along with water. While a creep is a slow downloads movement of rocks and soil.

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Answer:

So what is the question ..

About 110 gigatons of this missing carbon went into water reservoir of the carbon cycle.

The biogeochemical cycle in which carbon is exchanged between the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth is known as the carbon cycle.

According to the question, emitted amount of carbon is 480 gigatons but the amount of carbon in the environment is approx 190 gigatons, so the remaining amount of the carbon was stoored by the oceans and other water reservoir, which may be get clear throug the attached diagram.

Hence remaining gigatons of carbon went into water reservoir.

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The percent yield of zinc carbonate is 5.91%. This suggests that the reaction did not go to completion, and there was likely some loss of product during the experiment.

To find the percent yield of zinc carbonate, we need to compare the actual yield (what was obtained in the experiment) to the theoretical yield (what would be obtained if the reaction went to completion).

First, let's calculate the theoretical yield of zinc carbonate:

Now, let's calculate the percent yield:

The actual yield  \(ZnCO_{3}\) is given as 12.6 g.

The percent yield is calculated as:

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Full Question: A reaction between 1.7 moles of zinc iodide and excess sodium carbonate yields 12.6 grams of zinc carbonate. This is the equation for the reaction: Na2CO3 + ZnI2 → 2NaI + ZnCO3. What is the percent yield of zinc carbonate? The percent yield of zinc carbonate is %

Recrystalization will occur.The solution may become too diluted for crystals to form if you add too much solvent. Impurities will be captured by a hastily formed crystal's lattice. The crystals that result will also be smaller.

Recrystallization is a physical process used to separate compounds based on how soluble they are. Heating the material to dissolve the compound with impurities in a mixture of a suitable solvent completes the procedure. We can remove the desired chemical or contaminants from the mixture using this method.

The solution may become too diluted for crystals to form if you add too much solvent. The flask needs to be gently cooled, first at room temperature and then in cold water. Impurities will be captured by a hastily formed crystal's lattice. The resulting crystals will also be smaller.

The three main types of recrystallization are;

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Answer:

2

Explanation:

Silicon is one the elements found in nature and well positioned the periodic table.

It has an atomic number of 14 with an electronic configuration:

       1s² 2s² 2p⁶ 3s² 3p⁴

From this formula the orbital notation that represents the second principal energy level is 2.

The main energy level in which the orbital is located or the average distance of the orbital from the nucleus is the principal  quantum number.

It takes the number 1,2,3,4,5 e.t.c

The Henry's Law constant for argon if the partial pressure of argon in air is 0.0984 atm is 1.52 mole/L *atm.

Henry's regulation states that at a regular temperature, the amount of a given fuel that dissolves in a liquid is immediately proportional to the partial pressure of that gas in equilibrium with that liquid. Henry's regulation states that the solubility of a fuel in a liquid is immediately proportional to the pressure of the gas.

Pressure of argon =  p = 0.0984 atm

Molar solubility at 25°C, S = 0.150 mol/l

Calculating the Henry's Law constant,

     S =KP

       K =S/P

         0.150/0.0984

         = 1.52 mol/L atm

Hence the  Henry's Law constant (K) = = 1.52 mol/L atm

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Charles's Law helps us understand the relationship between temperature and volume of a gas when other factors, such as pressure and number of moles, remain constant. The empirical gas law that describes the relationship between the volume and temperature of a gas when the number of moles and pressure are constant is Charles's Law.  

This can be expressed mathematically as: V₁/T₁ = V₂/T₂
Where V₁ and V₂ represent the initial and final volumes of the gas, and T₁ and T₂ represent the initial and final temperatures of the gas, respectively. The relationship can also be stated as: V/T = constant

To illustrate this law, let's consider an example. Imagine a balloon filled with a fixed number of moles of gas at a constant pressure. If we were to heat the balloon by placing it in a warm environment, the temperature of the gas inside the balloon would increase.  

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Answer:

Balanced forces do not cause a change in motion. When balanced forces act on an object at rest, the object will not move. ... Forces that cause a change in the motion of an object are unbalanced forces. Unbalanced forces are not equal and opposite.

Explanation:

Any push or pull is a force. To describe a force, you must know two things. You must know the size of the force and the direction of the force. Suppose two teams are playing tug of war. Each team is pulling with equal force, but in opposite directions. Neither team can make the other team move. Forces that are equal in size but opposite in direction are called balanced forces.

tug of war balanced

Balanced forces do not cause a change in motion. When balanced forces act on an object at rest, the object will not move. If you push against a wall, the wall pushes back with an equal but opposite force. Neither you nor the wall will move. Forces that cause a change in the motion of an object are unbalanced forces.

tug of war unbalanced 1

Unbalanced forces are not equal and opposite. Suppose that one of the teams in tug of war pulls harder than the other team. The forces would no longer be equal. One team would be able to pull the other team in the direction of the larger force.

Force and Motion

More than one force can act on an object at the same time. If you hold a paper clip near a magnet, you, the magnet and gravity all exert forces on the paper clip. The combination of all the forces acting on an object is the net force. When more than one force is acting on an object, the net force determines the motion of the object. In this example, the paper clip is not moving, so the net force is zero.

How do forces combine to form the net force? If the forces are in the same direction, they add together to form the net force. Suppose you and a friend are asked to move a piano for the music teacher. To do this, you pull on one end of the piano, and your friend pushes on the other end. Together, your forces add up to enough force to move the piano. This is because your forces are in the same direction. Because the forces are in the same direction, they can be added together to determine the net force. In this case, the net force is 45 N, which is plenty to move a piano - if it is on wheels, that is!

net force piano

If two forces are in opposite directions, then the net force is the difference between the two forces, and it is in the direction of the larger force. Consider two dogs playing tug of war with a short piece of rope. Each is exerting a force, but in opposite directions.

Notice below that the dog on the left is pulling with a force of 10 N, and the dog on the right is pulling with a force of 12 N. Which dog do you think will win the tug of war? Because the forces are in opposite directions, the net force is determined by subtracting the smaller force from the larger one. In this case, the net force is 2 N in the direction of the dog on the right. Give that dog a dog biscuit!

Answer:

A. Object 1 is the heaviest

Hope it works!

Explanation:

Answer:

no

Explanation:

Answer:

--------------------------------------------------

Under standard conditions diamond converts to graphite spontaneously.

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we need to calculate the volume of the final solution after dilution. We know that we added enough water to make a total volume of 771 mL, so the volume of the NaCl solution must be?

The mole is defined as exactly 6.02214076×1023 elementary entities. Depending on the nature of the substance, an elementary entity may be an atom, a molecule, an ion, an ion pair, or a subatomic particle such as a proton.

moles NaCl = mass / molar mass
moles NaCl = 12.2 g / 58.44 g/mol
moles NaCl = 0.209 moles
volume NaCl solution = total volume - volume of water added
volume NaCl solution = 771 mL - volume of water added
To calculate the volume of water added, we can use the fact that we diluted the solution. We can set up a ratio of the initial concentration (which is the same as the molarity) to the final concentration, and use this ratio to solve for the volume of water added:
initial concentration * initial volume = final concentration * final volume
0.209 moles / initial volume = final concentration / 771 mL
final concentration = 0.209 moles / initial volume * 771 mL
Since we diluted the solution, we know that the final concentration is less than the initial concentration. We also know that we added water, which means the final volume is greater than the initial volume. We can set up a new ratio using the dilution factor (the ratio of final volume to initial volume) to solve for the final concentration:
final concentration = initial concentration / dilution factor
final concentration = initial concentration / (final volume / initial volume)
final concentration = initial concentration * (initial volume / final volume)
Now we can substitute in our values and solve for the final concentration:
final concentration = 0.209 moles * (771 mL / volume NaCl solution)
Finally, we can substitute this expression for final concentration into our previous equation and solve for the volume of water added:
0.209 moles / initial volume * 771 mL = 0.209 moles * (771 mL / volume NaCl solution) * (initial volume / final volume)
Simplifying and rearranging:
volume NaCl solution = initial volume * (0.209 moles / final concentration)
volume NaCl solution = initial volume * (0.209 moles / (0.209 moles * (771 mL / volume NaCl solution) * (initial volume / final volume)))
volume NaCl solution = initial volume * (771 mL / (0.209 * final volume))
Now we can substitute in our values and solve for the volume of the NaCl solution:
771 mL - volume of water added = initial volume
771 mL - (initial volume * (771 mL / (0.209 * final volume))) = initial volume
771 mL / (0.209 * final volume) = 1 + (initial volume / final volume)
(771 mL / (0.209 * final volume)) - (initial volume / final volume) = 1
771 mL / (0.209 * final volume) - (771 mL - volume NaCl solution) / final volume = 1
Simplifying and rearranging:
final volume = volume NaCl solution / (1 - 0.209 * (771 mL / volume NaCl solution))
Now we can substitute in our values and solve for the final volume:
final volume = 771 mL / (1 + 0.209 * (771 mL / volume NaCl solution))
Finally, we can use the final volume to calculate the final concentration (which is the molarity):
final concentration = 0.209 moles * (initial volume / final volume)
final concentration = 0.209 moles * (771 mL / (771 mL / (1 + 0.209 * (771 mL / volume NaCl solution))))
final concentration = 0.209 moles / (1 + 0.209 * (771 mL / volume NaCl solution))
Therefore, the molarity of the solution prepared by diluting 12.2 grams of NaCl with enough water to make 771 mL of solution is approximately 0.544 M.
To determine the molarity of a solution prepared by diluting 12.2 grams of NaCl with enough water to make 771 mL of solution, follow these steps:
Step 1: Calculate the moles of NaCl
To do this, divide the mass of NaCl (12.2 grams) by its molar mass (58.44 g/mol for NaCl).
Moles of NaCl = 12.2 grams / 58.44 g/mol = 0.209 moles
Step 2: Convert the volume of the solution to liters
Since molarity is expressed in moles per liter, convert the volume from mL to L by dividing it by 1000.
Volume in liters = 771 mL / 1000 = 0.771 L
Step 3: Calculate the molarity
Divide the moles of NaCl by the volume of the solution in liters.
Molarity = 0.209 moles / 0.771 L = 0.271 M
So, the molarity of the solution is 0.271 M.

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The quantity of the limiting reagent determines how many batches of Snickerdoodles are produced. Four Snickerdoodles can be created since cinnamon-sugar has a lower reagent need.

When a chemical reaction is complete, the limiting reagent—also known as the limiting reactant and limiting agent—is the reactant that has been completely consumed. Since the reaction is unable to continue without this reagent, the quantity of product that may be produced is constrained. surplus reagents or surplus reactants are any reagents that are present in amounts greater than those necessary to cause a reaction with the limiting reagent. The quantity of the limiting reagent determines how many batches of Snickerdoodles are produced. Four Snickerdoodles can be created since cinnamon-sugar has a lower reagent need.

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Answer:

28.93 g/mol

Explanation:

This is an extension of Graham's Law of Effusion where \(\frac{R1}{R2} = \sqrt{\frac{M2}{M1} } = \frac{t2}{t1}\)

We're only talking about molar mass and time (t) here so we'll just concentrate on \(\sqrt{\frac{M2}{M1} } = \frac{t2}{t1}\). Notice how the molar mass and time are on the same position, recall effusion is when gas escapes from a container through a small hole. The time it takes it to leave depends on the molar mass. If the gas is heavy, like Xe, it would take a longer time (4.83 minutes). If it was light it would leave in less time, that gives us somewhat an idea what our element could be, we know that it's atleast an element before Xenon.

Let's plug everything in and solve for M2. I chose M2 to be the unknown here because it's easier to have it basically as a whole number already.

\(\sqrt{\frac{M2}{131} } = \frac{2.29}{4.83}\)

The square root is easier to deal with if you take it out in the first step, so let's remove it by squaring each side by 2, the opposite of square root essentially.

\((\sqrt{\frac{M2}{131} } )^2= (\frac{2.29}{4.83})^2\)

\({\frac{M2}{131} } = (0.47)^2\)

\({\frac{M2}{131} } = 0.22\)

M2= 0.22 x 131

M2= 28.93 g/mol

Answer:

Chemistry reactions are used in art for the following processes;

1) Analog photography

The photographic paper used in analog photography react when exposed to light such that the image on the film stains the photopaper

A series of chemicals are further used to develop the images now carried on the paper and water is used to rinse of the chemicals after the other chemical processes are complete

The photopaper, now bearing the developed photo is hung for it to be dried

2) Paint used for painting consists of several chemicals, including, minerals that serve as pigment, oils that serve as carrying agent, a thinner to prevent the paint from turning to solid

An artist therefore combines different chemicals for a given paint task

3) In the sculpting process

An original sculpture is produced by the artist with the aid of clay or plaster, from the original sculpture, on which wax coatings and chemicals are used to make a replica mold.

Copies of the sculpture can then be made by pouring material into the mold

Explanation:

Answer:

A. Wisconsin

Explanation:

In the graph, Wisconsin has the highest speed limit.

Answer:

Chemical Change

Explanation:

chemical bonds within the substance have been altered because a new substance has been produced. It cannot be a mixture because they do not involve changes in matter, it cannot be a physical change because they do not result in new substances, it is not a solution because those do not involve changes in matter.