Which of the following solutions is the most acidic? (a) 0.2M LiOH, (b) 0.2 MHI, (c) 1.0 M methanol (CH3OH). 4.33 State whether each of the following statements is true or false. Justify your answer in each case. (a) Sulfuric acid is a monoprotic acid. (b) HCl is a weak acid. (c) Methanol is a base.
Answers
Among the given options, 0.2 M HI (hydroiodic acid) is the most acidic solution. Sulfuric acid is a diprotic acid, HCl is a strong acid, and methanol is a neutral compound, not a base.
To determine which solution is the most acidic among the given options, we need to consider the nature of the solutes.
(a) 0.2 M LiOH: Lithium hydroxide (LiOH) is a strong base. In an aqueous solution, it completely dissociates into Li⁺ and OH⁻ ions. Since it is a base, it will not contribute to acidity.
(b) 0.2 M HI: Hydroiodic acid (HI) is a strong acid. It completely dissociates into H⁺ and I⁻ ions in an aqueous solution. Since it is a strong acid, it will contribute to acidity.
(c) 1.0 M methanol (CH₃OH): Methanol (CH₃OH) is neither an acid nor a base in its pure form. It is considered a neutral compound. In the given form, as a 1.0 M solution, it will not contribute to acidity.
Therefore, among the given options, 0.2 M HI (hydroiodic acid) is the most acidic solution.
Now, let's evaluate the statements:
(a) Sulfuric acid is a monoprotic acid. - False: Sulfuric acid (H₂SO₄) is a diprotic acid, meaning it can donate two protons (H⁺) per molecule in an aqueous solution.
(b) HCl is a weak acid. - False: Hydrochloric acid (HCl) is a strong acid, meaning it completely dissociates into H⁺ and Cl⁻ ions in an aqueous solution.
(c) Methanol is a base. - False: Methanol (CH₃OH) is not a base. It is an alcohol and, in its pure form, is neutral. It does not possess the properties of a base, which typically accepts protons (H⁺).
Justification:
To evaluate the statements, it is essential to understand the definitions of monoprotic acids, strong acids, weak acids, and bases. Sulfuric acid is a diprotic acid, HCl is a strong acid, and methanol is not a base but a neutral compound.
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Related Questions
Determine the empirical formula of a compound that is 29.0% sodium, 40.5% sulfur, and 30.4 % oxygen by weight.
Answers
The empirical formula of a compound that is 29.0% sodium, 40.5% sulfur, and 30.4 % oxygen by weight is Na2S2O3.
Sodium (Na), sulfur (S), and oxygen (O) are elements that constitute the compound we need to find the empirical formula for. We first convert the mass percentages of each element to grams for a given mass (which we can assume to be 100g).
This gives us the following:
29.0 g Na
40.5 g S
30.4 g O
To find the empirical formula, we must find the ratio of each element in the compound. We can do this by dividing the number of moles of each element by the smallest number of moles, then rounding to the nearest whole number. This gives us the ratio of each element in the empirical formula.
For this compound, the ratio of
Na:S:O is 2:2:3.
Therefore, the empirical formula is Na2S2O3.
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Part II Dilution Problems: 16. A 1.2 molar solution of HCl is diluted to a final concentration of 0.53 mol/L. If the final volume is 950 mL, what was the original volume of the solution? How much water was added? 17. 350.0 mL of water was added to a 2.3 L solution of Naci. If the final concentration of the solution was 0.967 M, what was the original concentration of the solution? 18. 3.57 L of a 1,3 M solution of NaBr is diluted to a final concentration of 1.23 M. What is the final volume of the solution? 19. 350.0 mL of water was added to 700.0 mL of a 2.0 M solution of NaCl. What was the final concentration of the solution? 20. A bottle is labeled 12,0 M HCI. What volume of the original HCl is required to make 20.0 mL of 3.0 M HCl solution?
Answers
Answer:
The volume of water added is 530 mL
The initial volume is 420 mL
Explanation:
Here, we want to get the original volume of the solution and the volume of water added
Mathematically, according to the dilution formula, we have that as:
\(C_1V_1\text{ = C}_2V_2\)Where:
C1 and V1 are the molarity and volume of the first solution
C2 and V2 are the molarity and volume of the second solution
Substituting the values, we have it that:
\(\begin{gathered} 1.2\text{ }\times\text{ V}_1\text{ = 0.53 }\times\text{ 950} \\ V_1\text{ = }\frac{0.53\times950}{1.2} \\ \\ V_1\text{ = 420 mL} \end{gathered}\)The above is the initial volume
To get the amount of water added, we subtract the above from the final volume
Mathematically, we have that as:
\(950\text{ mL - 420 mL = 530 mL}\)The relative atomic mass of hydrogen is 1 and of carbon is 12. 12g of an unknown hydrocarbon (containing hydrogen and carbon only) was found to contain 9g of carbon. This is shown below. What is the value of x?
Answers
Answer:
CH4
Explanation:
I'll assume the x is the subscript for the hydrogen, as in CH\(x\)
We have 9g of C in the 12 gram sample. The remainder is hydrogen, H, we're promised. That means 3 grams of H.
Let's convert these two masses into moles of C and H. With moles, we are able to see the count relationship between the two elements.
Moles C = 9 g/12 g/mole = 0.70 moles C
Moles H = 3g/1 g/mole = 3.0 moles H
See the attached table.
We want whole numbers so let's take (1/0.70) = 1.33455 and then multiply this factor by both mole values:
Moles C = 1
Moles H = 4.0037, which we'll round to 4
There are 4 H for every 1 C
CH\(4\)
The relative atomic mass of hydrogen is 1 and of carbon is 12. 12g of an unknown hydrocarbon was found to contain 9g of carbon. The value of x is 4.
What is relative atomic mass?The ratio of both the average weight of atoms of such a chemical element found in a particular sample towards the atomic mass standard is known as relative atomic mass, sometimes referred to as RAM or by the obsolete term atomic weight.
The mass of an atom of carbon-12 is used to establish the atomic mass constant. Since the ratio's two components are masses, the final number has no dimensions, which is why it is referred to as relative. The relative atomic mass of hydrogen is 1 and of carbon is 12. 12g of an unknown hydrocarbon (containing hydrogen and carbon only) was found to contain 9g of carbon. The value of x is 4.
Therefore, the value of x is 4.
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HOW LONG WILL IT TAKE TO PRODUCE 2DM3 OF CHLORINE GAS BY PASSING A 6A
CURRENT THROUGH CONCENTRATED SODIUM CHLORIDE SOLUTION AT R.T.P?
Answers
Answer:
2679.5 seconds or 2679.5 / 60 = 44.66 minutes to produce 2 dm3 of chlorine gas.
Explanation:
To solve this we must be knowing each and every concept related to current. Therefore, it will take 44.66 minutes to produce 2 dm³ of chlorine gas by passing 6A current through concentrated sodium chloride solution.
What is current?When an electrical current continually runs in a single direction, it is said to be in direct current. Rectifiers, batteries, generators using commutators, and fuel cells all generate direct current. A flashlight or an appliance powered by batteries, for instance, both use direct current.
Among the most crucial subjects addressed in physics is AC, DC current. A form of electrical current known as an alternating current, sometimes known as an AC current, is one in which the direction of electron flow changes periodically.
2679.5 / 60 = 44.66 minutes to produce 2 dm3 of chlorine gas by passing a 6A current through concentrated sodium chloride solution.
Therefore, it will take 44.66 minutes to produce 2 dm³ of chlorine gas by passing 6A current through concentrated sodium chloride solution.
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Please help? It’s for chem
Answers
Answer:
O-H
Explanation:
It is polar covalent bond, because the hydrogen atom has electronegativity about 2.6, and the oxygen atom, electronegativity about 3.6. When the difference in electronegativity of the atoms is between 0.4 and 1.7, the result is a polar covalent bond.
A student is interested in resource recovery through composting. Which field
of study would be most useful?
A. Botany
B. Microbiology
C. Geophysics
D. Oceanography
SUBMIT
Help pls
Answers
Answer:
microbiology
Explanation:
An individual is hospitalized and the initial blood work indicates high levels of hco3- in the blood and a ph of 7. 47. This would indicate the individual probably has?
Answers
An individual is hospitalized and the initial blood work indicates high levels of \(HCO_{3} ^{-}\) in the blood and a pH of 7. 47. This would indicate the individual probably has compensated respiratory acidosis.
A chronic illness usually leads to compensated respiratory acidosis because the kidneys have time to adjust to the delayed onset. Even if the \(PCO_{2}\) is elevated in a compensated respiratory acidosis, the pH is within the usual range.
The kidneys counteract a respiratory acidosis by increasing the amount of \(HCO_{3}\) that tubular cells reabsorb from the tubular fluid, the amount of \(H^{+}\) that collecting duct cells secrete while also producing \(HCO_{3}\) , and the amount of \(NH_{3}\) buffer that is formed through ammoniagenesis.
Respiratory acidosis is frequently brought on by hypoventilation as a result of: breathing depression , paralysis of the respiratory muscles, diseases of the chest wall , abnormalities of the lung parenchyma and abdominal squeezing.
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In the molecular orbital model of cyclobutadiene, how many -antibonding molecular orbitals are there?
Answers
There are one antibonding molecular orbitals present in molecular orbital model of c.
The cyclobutadiene has a pi system comprised of four individual atomic p - orbital and thus should have a four pi molecular orbitals. The compound is the prototypical antiaromatic hydrocarbon with 4 \(\pi\) - electrons . Its rectangular structure is the result of jahn teller reaction which disorder the molecule and lowers its symmetry , converting the triplet to a singlet ground state. It is a small annulene . The delocalisation energy of the \(\pi\) electrons of the cyclobutene is predicted to be zero .
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carbon has an atomic radius of 0.071 nm. what type of defect does it most likely form in nickel, which has an atomic radius of 0.125 nm?
Answers
Since carbon is smaller than nickel, it causes a point defect called a substitutional defect when it takes up a lattice spot in nickel.
A alien atom replaces a host atom in a material's crystal lattice in a substitutional defect. In this instance, the lattice substitutes a carbon atom for a nickel atom, and the lattice is deformed around the defect location.
The qualities of the material, including its mechanical strength and magnetic properties, can be significantly impacted by this kind of flaw. It's important that carbon can create interstitial defects in nickel by occupying the spaces left by the host atoms in the crystal lattice.
However, because carbon is much smaller than nickel, it has a far lesser chance of occupying an interstitial site than it does a substitutional site.
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Which substance would be the strongest?
carbon
steel
gold
silver
Answers
Answer:
steel
Explanation:
Answer:
B. STEEL
Explanation:
Nigeria experiences several more hours of daylight in summer than in winter. Which statement helps explain this observation?
Answers
Answer:
Earth is tilted on its axis
Explanation:
Whenever Earth is tilted on its axis, the tilt of the earth's rotational axis causes Nigeria to have longer days in the summertime, beginning in June, compared to the winter period. The tilting of the earth also causes Nigeria to experience longer nights in the winter.
The earth’s axis of rotation is tilted at an angle of 23.5 degrees compared to the earth's orbital plane. Such tilting of the earth is what causes Nigeria to experience longer hours during the day in the summer when the Northern Hemisphere is titled toward the sun starting around June 20 or 21.
which ketone in each pair is more reactive? 2-hexanone or 3-hexanone
Answers
2-hexanone is more reactive than 3-hexanone.
The reactivity of a ketone can be influenced by the position of the carbonyl group relative to the alkyl substituents. In the case of 2-hexanone and 3-hexanone, the position of the carbonyl group differs.
2-hexanone has the carbonyl group located on the second carbon of the hexane chain, whereas 3-hexanone has the carbonyl group on the third carbon. The reactivity of ketones typically increases as the carbonyl group is closer to the end of the alkyl chain.
In this case, 2-hexanone has a more reactive carbonyl group than 3-hexanone because it is closer to the end of the carbon chain. The proximity to the end of the chain allows for greater accessibility and interaction with nucleophiles during reactions.
The increased reactivity of 2-hexanone can be attributed to the greater electronic and steric effects experienced by the carbonyl group, which make it more susceptible to nucleophilic attack or other chemical transformations compared to 3-hexanone.
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Electricity is created when ____ move. electrons protons neutrons
Answers
Answer:
electrons
Explanation:
electricity is the flow of electrons through a conductor
Answer:
protons
Explanation:
and neutrons never move from object to object. The energy that comes from these charged particles is called electrical energy.
if a linear graph has a negative slope, what can you say about the dependent variable?
Answers
Answer:
If a linear graph has a negative slope then dependent value decreases in value as the independent variable increases. The line with negative slope is sloping down to the right
What is the wavelength (in nm) of a radiation electromagnetic whose frequency is 7.45 x 1014/s? (Hint: c = 3.00 x 108 m/s and h = 6.63 x 10-34 J.s):
a. None is correct
b. 4.03 x 10-7
c. 402
d. 2.24x1014
e. 1.34 x 10-6
Answers
The wavelength of a electromagnetic radiation with the frequency of 7.45 x 1014/s is 402 nm.
The wavelength (λ) of a radiation electromagnetic can be calculated using the formula λ = c/f, where c is the speed of light and f is the frequency. From the given information, we have the frequency as 7.45 x 10^14/s and the speed of light as 3.00 x 10^8 m/s. However, we need to convert the frequency to Hz to match the units of the speed of light. Thus, we have:
f = 7.45 x 10^14/s = 7.45 x 10^14 Hz
Substituting the values in the formula, we get:
λ = c/f = 3.00 x 10^8 m/s / 7.45 x 10^14 Hz
Simplifying the expression, we get:
λ = 4.03 x 10^-7 m
However, the answer choices are given in nanometers (nm), so we need to convert meters to nanometers. Since 1 m = 1 x 10^9 nm, we have:
λ = 4.03 x 10^-7 m = 4.03 x 10^-7 x 10^9 nm/m = 402 nm
Therefore, the correct answer is (c) 402 nm.
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At the same conditions of temperature and pressure, 1.0 dm3 of a gas X has a mass of 3.0 g,
while 1.0 dm3 of gas Y has a mass of 2.8 g.
What is the ratio of the molecular masses of the two gases?
Answers
The ratio of the molecular masses of gas X to gas Y is approximately 1.07.
To find the ratio of the molecular masses of gases X and Y, we need to determine the number of moles of each gas using the ideal gas law equation:
PV = nRT
Given that the conditions of temperature and pressure are the same for both gases (assuming they behave ideally), we can use the equation to calculate the number of moles.
For gas X:
PV = nXRT
nX = (PV) / RT
For gas Y:
PV = nYRT
nY = (PV) / RT
Since the temperature, pressure, and volume are the same for both gases, we can simplify the equation:
nX / nY = (PV) / (PV) = 1
This means that the ratio of the number of moles of gas X to gas Y is 1:1.
Now, to find the ratio of the molecular masses, we can divide the mass of gas X by the number of moles of gas X, and the mass of gas Y by the number of moles of gas Y:
Ratio of molecular masses = (mass of gas X / nX) / (mass of gas Y / nY)
= (3.0 g / nX) / (2.8 g / nY)
= (3.0 g / 1 mole) / (2.8 g / 1 mole)
= 3.0 / 2.8
≈ 1.07
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What is that Molar mass of ammonium phosphite?
Answers
Answer:
149.09 g/mol GOOD LESSONS ♡
Answer:
The answer is 149.09 g/mol
Explanation:
I hope this helps!!
Assume that you are given samples of two white crystalline compounds, one of them ionic and the other one covalent. Describe how you might tell which is which.
Answers
To determine which of the two white crystalline compounds is ionic and which is covalent, there are several methods that could be used. One way is to test their solubility in water.
Ionic compounds tend to be soluble in water, while covalent compounds tend to be insoluble or only slightly soluble. Another method is to test their conductivity in water. Ionic compounds will conduct electricity in water due to the presence of charged ions, while covalent compounds will not. Additionally, the melting and boiling points of the compounds could also provide clues. Ionic compounds tend to have higher melting and boiling points than covalent compounds due to their stronger electrostatic interactions. Finally, the chemical formula of the compounds could also give some indication. Ionic compounds tend to be made up of a metal and a non-metal, while covalent compounds are typically made up of non-metals only. By analyzing these characteristics, one can determine which of the two white crystalline compounds is ionic and which is covalent.
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the enthalpy of hydrogenation of cyclohexa-1,3-diene is not exactly double that of cyclohexene. suggest a value for the enthalpy of hydrogenation of cyclohexa-1,3-diene and justify your value.
Answers
Value within range -239 to -121, Double bonds separated by one single bond / alternating (or shown in structure) and Allows some delocalisation/overlap of p orbitals.
What is orbitals?orbital, in chemistry and physics, a mathematical expression, called a wave function, that describes properties characteristic of no more than two electrons in the vicinity of an atomic nucleus or of a system of nuclei as in a molecule. An orbital often is depicted as a three-dimensional region within which there is a 95 percent probability of finding the electron (see illustration).Understand the concept of the different orbital shapes and sizesUnderstand the concept of the different orbital shapes and sizesSee all videos for this article Atomic orbitals are commonly designated by a combination of numerals and letters that represent specific properties of the electrons associated with the orbitals—for example, 1s, 2p, 3d, 4f. The numerals, called principal quantum numbers, indicate energy levels as well as relative distance from the nucleus. A 1s electron occupies the energy level nearest the nucleus.To learn more about nucleus refer to:
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a cell biologist measures the width of a cell. The width is 76um. what is the width in meters? write in scientific notation.
Answers
The width of the cell, which is 76 micrometers will be have a scientific notation value of 7.6 × 10-⁵metres
CONVERSION FACTOR:
According to this question, a cell biologist measures the width of a cell and found out it is 76um. 76um means 76 micrometersMicrometers (um) is a smaller unit of measurement than the metres. The conversion factor of metres and micrometers is as follows:1um = 10-⁶m
Hence, 76um will be equal to 76 × 10-⁶m= 7.6 × 10-⁵mTherefore, the width of the cell in metres is 7.6 × 10-⁵m.
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Which of the following has the largest ionic radius?
Group of answer choices
Mg 2+
S 2-
F -
Answers
The ion of the element from above which has the greatest ionic radius is S²- ( sulphur ion )
The correct answer choice is option b.
Understanding the ionic radius of a chemical elementIt follows that distance between the nucleus of an ion to that till that point it influence on its electron cloud, is referred to as the ionic radius of an ion of an element. Within the context of this task, the atomic radius of sulphur ion is 184 ppm.
Furthermore more, this periodic trend of elements, that is, the ionic radius decreases across the period but increases down the group.
So therefore, we can correctly deduce from the explanation above that S²- has the largest ionic radius.
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Where is copper (Cu) likely to be located in the car? Discuss the physical and chemical properties of copper in your answer.
Answers
students measured and recorded the density of 4 samples. using the density column and the data table shown above, which of the samples will probably float on top of the oil?
Answers
Sample D will probably float on top of the oil based on its lower density compared to the other samples.
To determine which sample will float on top of the oil, we need to compare the density of each sample with the density of the oil. From the data table, we can see that the density of the oil is 0.8 g/mL.
Sample A has a density of 1.2 g/mL, which is higher than the density of the oil. This means that Sample A will sink in the oil.
Sample B has a density of 0.9 g/mL, which is also higher than the density of the oil. This means that Sample B will also sink in the oil.
Sample C has a density of 0.7 g/mL, which is lower than the density of the oil. This means that Sample C will float on top of the oil.
Sample D has a density of 0.5 g/mL, which is the lowest density among all the samples. This means that Sample D will most likely float on top of the oil.
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why was the hand cream used as a separating agent when the flubber was handled
Answers
Answer:
Because you don't want 2 different things mixing together unless their supposed to be mixed together
Explanation:
The hand cream used as a separating agent when the flubber was handled because it is not about 2 different things mixing together unless their supposed to be mixed together.
What is separating agent ?
In chemical separation processes, A separating agent is the heat work added to facilitate the separation of two chemical species. It is contrasted with a mass separating agent, which is any chemical species added to the reaction that facilitates the reaction.
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4. two sealed tanks each contains gas at 273 k. tank a contains 9.00 g of argon gas, and tank b contains 18.7 g of chlorine gas. a. how many moles of gas are in each tank? (2 points)
Answers
There are approximately there are 0.000706 moles of chlorine gas in Tank B.
Tank A:
We can use the ideal gas law to find the number of moles of gas in Tank A.
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
Since the tanks are sealed, we can assume that the pressure is constant and equal to atmospheric pressure. We also know the temperature (273 K) and the volume of the tank is not given, but we don't need it for this calculation.
Rearranging the ideal gas law to solve for n, we get:
n = PV/RT
Plugging in the values for Tank A:
n = (1 atm)(0.009 m^3)/((0.08206 L*atm/mol*K)(273 K))
n = 0.000339 mol
Therefore, there are 0.000339 moles of argon gas in Tank A.
Tank B:
Using the same method as above, we can find the number of moles of chlorine gas in Tank B.
n = PV/RT
Plugging in the values for Tank B:
n = (1 atm)(0.009 m^3)/((0.08206 L*atm/mol*K)(273 K))
n = 0.000706 mol
Therefore, there are 0.000706 moles of chlorine gas in Tank B.
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A Virginia class nuclear submarine has an internal volume of 7.9 million
liters at a pressure of 1.0 atm. If a crewman were to open one of the
hatches to the outside ocean while it was underwater (pressure = 25 atm),
what be would the new volume of the air inside the submarine?
Answers
Answer:
1500
Explanation:
I believe this is correct but am not sure, I shall update when I submit my quiz...
Who has played Amoung us and a stranger got ur number or location on there?
Answers
Yep, it happened to me
Consider a reaction whose rate constant is 3. 4 m-1s-1 at 600k and 31. 0 m-1s-1 at 750k. Find the activation energy (in kj/mol) of the reaction. Express your answer to 2 decimal places
Answers
The activation energy of the reaction is approximately 71.46 kJ/mol, rounded to 2 decimal places.
To find the activation energy (Ea) of the reaction, we can use the Arrhenius equation, which relates the rate constant (k) to the temperature (T) and activation energy. The Arrhenius equation is given by:
k = A * e^(-Ea/RT)
Where:
k is the rate constant
A is the pre-exponential factor (frequency factor)
Ea is the activation energy
R is the gas constant (8.314 J/(mol·K))
T is the temperature in Kelvin
We have two sets of data:
At 600 K, k1 = 3.4 m^(-1)s^(-1)
At 750 K, k2 = 31.0 m^(-1)s^(-1)
Taking the natural logarithm (ln) of both sides of the Arrhenius equation, we can rearrange the equation to solve for the activation energy:
ln(k) = ln(A) - (Ea/RT)
We can create two equations using the given data:
ln(k1) = ln(A) - (Ea/(R * 600))
ln(k2) = ln(A) - (Ea/(R * 750))
Subtracting the second equation from the first eliminates the ln(A) term:
ln(k1) - ln(k2) = (Ea/R) * ((1/600) - (1/750))
Simplifying further:
ln(k1/k2) = (Ea/R) * ((750 - 600) / (600 * 750))
Now we can solve for Ea:
Ea = (R * (ln(k1/k2))) / ((750 - 600) / (600 * 750))
Using the given values and the appropriate units:
Ea = (8.314 J/(mol·K) * ln(3.4/31.0)) / ((750 - 600) / (600 * 750))
Converting the units from J to kJ:
Ea = (8.314 × 10^(-3) kJ/(mol·K) * ln(3.4/31.0)) / ((750 - 600) / (600 * 750))
Ea ≈ 71.46 kJ/mol
Therefore, the activation energy of the reaction is approximately 71.46 kJ/mol, rounded to 2 decimal places.
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in this short synthetic sequence, provide the organic structures of the missing reactant and the missing product.
Answers
The first step of the reaction, we have reaction between a nucleophile and an electrophile.
We can see that in the first step of the reaction, we have reaction between a nucleophile and an electrophile. In this case, the electrophile would have to be an alkyl halide which produces a carbocation as show in the image attached. What we have here is quite similar or like most of the organic reactions, this reaction occurs in a number of detailed or smaller steps and each step of the reaction is going to help to bring us closer to the end product of the entire steps of the reaction which is wat we target as we carry out the particular reaction.The second step involves the reduction of the alkyne with the use of a Lindlar catalyst. As such the reaction is poisoned and it stops at the alkyne stage rather than going on to obtain the alkane.
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Of the four gases co2, h2o, n2, and o2, which are greenhouse gases?.
Answers
Answer:
h20, 02, and c02
Explanation: