Answer:
In the case of 2-octyne, the major product is trans-2-octene.
Explanation:
When 2-octyne is treated with sodium (Na) in liquid ammonia (NH3), it undergoes a reaction known as the Birch reduction. The Birch reduction is a powerful method for reducing alkynes to yield trans-alkenes. In this case, the major organic product that results from the reaction is trans-2-octene.
The reaction proceeds as follows:
2-octyne + 2 Na + 2 NH3 → trans-2-octene + 2 NaNH2 + H2
The double bond in the resulting trans-2-octene is formed between the second and third carbon atoms, with a trans configuration indicating that the two substituents attached to the double bond are on opposite sides of the molecule.
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the arrangement of electrons in an atom of an element determines the chemical properties of that element. Our present day understanding of how electrons are arranged in an atom is the result of all of these scientific contributions except
The result of all of these scientific contributions except Rutherford's gold foil experiment proved the existence of the nucleus.
The valence electrons mainly determine the chemical houses of the elements. The elements inside the equal group have comparable chemical homes because they have identical valence shell electron configurations. The electrons in the power degrees with the highest range are in common the farthest from the nucleus.
Because variations in electrons placed inside the outermost stage distinguish an atom from its nearest noble fuel these are the electrons accountable for the atom's chemical conduct. Electrons located inside the outermost shell of the electron cloud are called valence electrons and feature the best power. Valence electrons determine the chemical homes of an element or how the valence electrons of 1 element are shared or traded with valence electrons of other elements to create new molecules.
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choose the reagents that will accomplish the following transformation in 2 steps. a) c6h5co3h in ch2cl2 b) nah; then ch3oh c) oso4, then nahso3/h2o d) ch3ona in ch3oh e) h2, lindlar’s cat.
The reagents that can accomplish the desired transformation in two steps are NaH, followed by CH3OH (Option b).
To accomplish the transformation of C6H5CO3H, we need to identify the reagents that can undergo two steps to yield the desired product. Let's analyze each option:
a) C6H5CO3H in CH2Cl2: This reagent is not suitable for the desired transformation.
b) NaH, then CH3OH: This combination of reagents can be used to perform an acid-base reaction followed by an alcoholysis. NaH is a strong base that can deprotonate C6H5CO3H to form the corresponding carboxylate ion. Then, CH3OH can react with the carboxylate ion to give the desired product.
c) OsO4, then NaHSO3/H2O: This reagent combination is used for oxidative cleavage of alkenes and is not applicable to the transformation of C6H5CO3H.
d) CH3ONA in CH3OH: This combination of reagents is not suitable for the desired transformation.
e) H2, Lindlar's catalyst: This reagent combination is used for the hydrogenation of alkynes and is not applicable to the transformation of C6H5CO3H.
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Which of these pairings would
create an octet for each atom?
A. one calcium atom and sulfur atom
B. one lithium atom and one sulfur atom
C. one strontium atom and one nitrogen atom
D. one aluminum atom and one oxygen atom
Correct option is A, Pairing A (one calcium atom and one sulfur atom) would create an octet for each atom.
To determine which of these pairings would create an octet for each atom, we need to consider the number of valence electrons for each element involved. An octet is achieved when an atom has 8 valence electrons in its outer shell.
A. one calcium atom and one sulfur atom:
Calcium (Ca) has 2 valence electrons and Sulfur (S) has 6 valence electrons. When Calcium loses 2 electrons and Sulfur gains 2 electrons, both achieve an octet. This pairing works.
B. one lithium atom and one sulfur atom:
Lithium (Li) has 1 valence electron and Sulfur (S) has 6 valence electrons. Lithium can lose 1 electron, but Sulfur needs 2 more electrons to achieve an octet. This pairing doesn't work.
C. one strontium atom and one nitrogen atom:
Strontium (Sr) has 2 valence electrons and Nitrogen (N) has 5 valence electrons. Strontium can lose 2 electrons, but Nitrogen needs 3 more electrons to achieve an octet. This pairing doesn't work.
D. one aluminum atom and one oxygen atom:
Aluminum (Al) has 3 valence electrons and Oxygen (O) has 6 valence electrons. Aluminum can lose 3 electrons, and Oxygen can gain 2 electrons. However, the transfer of electrons doesn't lead to an octet for both atoms. This pairing doesn't work.
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Is this statement true or false?
A compound is a substance made of two or more elements joined in a chemical reaction.
true
false
The correct answer is False.
In the chemical industry, ammonia is manufactured by the Haber process according to the following chemical equation. N2(g) + 3 H2(8) = 2 NH3(g) + heat This is an exothermic reaction. How can the yield of ammonia production be improved?
The chemical industry, ammonia is manufactured using the Haber process, which involves the reaction of nitrogen N2 and hydrogen H2 gases to form ammonia NH3 as shown by the equation: N2g + 3 H2 g = 2 NH3 g + heat. This reaction is exothermic, meaning it releases heat.
To improve the yield of ammonia production, you can manipulate certain factors, such as temperature, pressure, and the use of a catalyst. Here's a step-by-step explanation. Temperature Since the reaction is exothermic, according to Le Chatelier's principle, lowering the temperature will shift the equilibrium towards the formation of more ammonia. However, lower temperatures also slow down the reaction rate, so a compromise temperature of around 400-450°C is typically used. Pressure The Haber process involves a decrease in the number of moles of gas from the reactant's moles to the products 2 moles. Therefore, increasing the pressure will shift the equilibrium towards the side with fewer moles, which is the ammonia side. Higher pressures around 200-300 atmospheres are used to improve the yield of ammonia. Catalyst Introducing a catalyst, such as iron with a promoter like potassium oxide, will help speed up the reaction without affecting the equilibrium itself. The catalyst lowers the activation energy of the reaction, allowing it to proceed more efficiently and quickly, thus increasing the ammonia production rate. By optimizing these factors, you can improve the yield of ammonia production in the chemical industry using the Haber process.
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The mass of a hydrogen atom is
1.67 × 10 grams.
-24
The mass of a nitrogen atom is
2.32 × 107 grams.
- 23
A molecule of ammonia contains 3 atoms of
hydrogen and 1 atom of nitrogen.
a) Calculate the mass of one molecule of
ammonia
Give your answer in standard form.
b) Calculate the number of molecules in 1
gram of ammonia.
Give your answer in standard form to 3
significant figures.
8.65g of sodium sulfide is added to 450 mL of 0.350 mol/L lead (Il) nitrate solution. Calculate the maximum mass of precipitate that can form.
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the maximum mass of precipitate that can form is 26.31g.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Pb(NO\(_3\))\(_2\)(aq) + Na\(_2\)S(aq) —> PbS(s) + 2 NaNO\(_3\)(aq)
mole of sodium sulfide =8.65/78.05
=0.11moles
the mole ratio between Na\(_2\)S and PbS is 1:1
moles of PbS= 0.11moles
mass of PbS= 0.11moles × 239.2g/mol
=26.31g
Therefore, the maximum mass of precipitate that can form is 26.31g.
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When a small piece of copper metal is added to a silver nitrate solution, the following reaction occurs: 2Ag+NO3+Cu → Cu (NO3)2+2Ag
This equation represents both a single replacement reaction AND a(n) ______________________ reaction.
Question 4 options:
A. oxidation - reduction
B. neutralization
C. combustion
D. decomposition
Answer:
A. Oxidation-reduction
Explanation:
I assume you mean the reaction is:
Ag2NO3(aq) + Cu(s) -> 2Ag(s) + Cu(NO3)2(aq)
Either way:
Solids have the oxidation number of 0. So in the beginning of the reaction Cu(s) has the oxidation number 0, and at the end it has a oxidation number of +2. So it was oxidized.
Ag in the beginning of the reaction has the oxidation number of +1, and ends with the oxidation number of 0. It was reduced.
So its an oxidation reduction.
Each ""20-mg"" capsule of Prozac contains 22.5 mg of fluoxetine HCL (m.w. 345.63) equivalent to 20 mg of fluoxetine base. Calculate the molecular weight of the fluoxetine base. Round your answer to the HUNDRETHS decimal place.
The given formula is incorrect for determining the molecular weight of fluoxetine base. The molecular weight of fluoxetine base is approximately 309.17 g/mol.
The molecular weight of fluoxetine base can be calculated by subtracting the molar mass of the hydrochloride (HCl) portion from the molar mass of fluoxetine HCl.
Given:
Molar mass of fluoxetine HCl (MW) = 345.63 g/mol
Amount of fluoxetine base = 20 mg
To calculate the molecular weight of fluoxetine base, we need to subtract the molar mass of the HCl portion from the molar mass of fluoxetine HCl:
Molecular weight of fluoxetine base = MW - Molar mass of HCl
The molar mass of HCl is approximately 36.46 g/mol.
Molecular weight of fluoxetine base = 345.63 g/mol - 36.46 g/mol
= 309.17 g/mol
Therefore, the molecular weight of fluoxetine base is approximately 309.17 g/mol.
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How many moles of Na2SO4 are present in 284.078 grams of Na2SO4?
2
3
5
6
Answer:
2
Explanation:
\(mole = \frac{mass}{relative \: molecular \: mass} \)
Mass of Na2SO4 = 284.078g
Relative Molecular Mass = 142g/mol
\(therefore \\ mole = \frac{284.078}{142} \)
mole = 2.000549
mole ≈ 2
How many moles of calcium carbonate are in 63.8 g of calcium carbonate?
Answer:
0.638 moles in 63.8g of calcium carbonate
Explanation:
difference between electron and proton
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the pka of cyclopentane is > 60, which is about what is expected for a hydrogen that is bonded to an sp3 carbon. explain why cyclopentadiene is a much stronger acid ( pka of 15), even though it too involves the loss of a proton from an sp3 carbon.
A saturated hydrocarbon (alkane) system is cyclopentane. A negative charge results from the removal of a proton from any one of the five sp3 carbons.
Why is cyclopentadiene a strong acid?An illustration of why cyclopentadiene is a significantly more potent acid
A molecule's propensity to lose a proton determines its acidic nature. As a result, cyclopentadiene is more acidic than cyclopentane because it contains conjugated double bonds.
Cyclopentane is a saturated hydrocarbon (alkane) system. Any one of the five sp3 carbons loses a proton, leaving a negative charge behind.
It basically comes down to aromaticity vs. the quantity of resonance structures. Well said! Aromaticity outweighs the number of resonance structures because it is a much stronger driving factor; Huckel's rule is more significant. Cycloheptatriene is less acidic than cyclopentadiene as a result.
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As the pressure of an enclosed gas decreases to half its original value, what happens to the volume of the gas if the temperature is held constant?
Answer:
At this point the volume of the gas is halved. If the pressure on the piston is again doubled, the volume of gas decreases to one-fourth its original volume. FIGURE 9.8 Boyle's Law: At constant temperature, the volume of a gas sample is inversely proportional to the pressure.
The volume of the gas doubles.
Boyles law state that the pressure of a gas is indirectly proportional to the volume at constant temperature. It is given by:
PV = constant
Let us assume that initially the pressure is P and the volume is V, hence:
\(P_1=P,V_1=V\)
The volume decreases to half its original value, hence:
\(P_2=\frac{P}{2}\)
Therefore:
\(P_1V_1=P_2V_2\\\\\\PV=\frac{P}{2}V_2\\\\V_2=2V\)
Therefore the volume of the gas doubles.
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what is the energy of a resting object called
Answer:
the called potential energy because the potential energy is the latentenergy in an object at rest
1. The calendar below shows a sample month of the year. Suppose that you see a full moon on the first day of this month.
Draw and label a picture of the full moon on this day.
Draw and label a picture of the third quarter moon on the day you would expect to see it.
Draw and label a picture of the new moon on the day you would expect to see it.
Draw and label a picture of the first quarter moon on the day you would expect to see it.
Answer:The 1st Quarter Moon is a primary Moon phase when we can see exactly half of the Moon's surface lit up. ... The First Quarter Moon rises around midday and is visible in the day sky. ... when the Moon has reached the first quarter of its orbit around Earth, hence the name. ... Full Moon Names · Taking pictures of the Moon.
Explanation:
5TH GRADE SCIENCE HELP NOW!!!!
Buying fruit and vegetables needs to be done more often as these types of foods can quickly get go rotten. What could you do to slow down the chemical change of fruits and vegetables rotting? Give a reason to support your answer.
Answer:
Putting them somewhere cold because the atoms slow as the temperature decreases
Explanation:
Answer:
Lemon juice is one of the most common(I use this method), as well as cold temperatures
Explanation:
The reason why lemon juice is a common way to perserve fruit, is because the acid in lemons prevents mold growth,
It also, prevents oxygen to affect the surface of the fruit.
Refridoraitng and freezing fruits and veggies also help.
The cold conditions causemost bacteria and mold to die and be incapable of surviving on the foods.
It also slows down the fruit and vegtables chemical proccess which realeases what is called ethylne. This is a enzyme.
This enzyme makes cells "run" their genetic code that begins the ripening process in foods.
So basically, the cold temperatures slows down the production of this enzymem, slowing the riping process.
Hope this helps!
how many moles of barium nitrate contain 6.80x10 to the 24th formula units?
3.51023 at. I moles. 6.80 x 1024 fux. 1 www. Count the atoms in the system.
What point should I be worried about a mole?Dermatologists advise monthly skin checks for their patients. often benign moles Consult a dermatologist to have your mole examined if you detect changes in its color or appearance. Moles should also be examined if they bleed, leak, itch, look scaly, change in size, or become uncomfortable or painful.
What shape does the malignant mole have?It's possible for the pigment to penetrate the nearby skin. unbalanced color: There could be various tones of tan, brown, and black. Areas of red, pink, blue, gray, or white may also appear.
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Gas in a balloon occupies 3.3 liters. What volume will it occupy if the pressure is changed from 100 kPa to 90.0 kPa, if the temperature is held constant?
Answer:
3.7 L
Explanation:
Initial volume (V₁) = 3.3 L
Initial pressure (P₁) = 100 KPa
Final pressure (P₂) = 90 KPa
Final volume (V₂) =?
The final volume of the gas can be obtained by using the Boyle's law equation as follow:
P₁V₁ = P₂V₂
100 × 3.3 = 90 × V₂
330 = 90 × V₂
Divide both side by 90
V₂ = 330 / 90
V₂ = 3.7 L
Thus, the final volume of the gas is 3.7 L
Write net ionic equation for the reaction between nitric acid and calcium hydroxide.
The net ionic equation is applied mainly in neutralization reactions, double displacement reactions and redox reactions. The net ionic equation is as follows
Ca(OH)\(_2\)(s)+2HNO\(_3\)(aq)→Ca(NO\(_3\))\(_2\)(aq)+2H\(_2\)O(l)
What is net ionic equation?
The net ionic equation represents a chemical equation of a reaction that give an idea of species that are really participating in the reaction. We can write net ionic equations for those electrolyte which are strong in water.
The balanced net ionic equation is
Ca(OH)\(_2\)(s)+2HNO\(_3\)(aq)→Ca(NO\(_3\))\(_2\)(aq)+2H\(_2\)O(l)
Thus the net ionic equation is
Ca(OH)\(_2\)(s)+2HNO\(_3\)(aq)→Ca(NO\(_3\))\(_2\)(aq)+2H\(_2\)O(l)
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Which statement best explains the reason that the metal part of a seatbelt is a better thermal conductor than the plastic part?
A. The metal has densely packed particles, which limits energy transfer by the collision of particles.
B. The metal has densely packed particles, which allows for more collisions in a given area.
C. The metal has loosely packed particles, which limits energy transfer by the collision of particles.
D. The metal has loosely packed particles, which allows for more collisions in a given area.
Answer:
b it seems like the only one that makes sense
the correct answer is b, I just took the quiz and the other answer on this question was correct
In most mirrors, the virtual image appears to come from behind the mirror. True False
Answer
False
Explanation:
1. How many grams of CuNO, are required to produce 700.0 mL of a 2.0 M CUNO,
solution?
a) 175 g
b) 87.7 g
c) 43.8 g
d) 117 g
e) 1.50 g
Answer:
b
Explanation:
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Which of the following gives the balanced equation for this reaction?
Answer:
\(B\)Explanation:
Here, we want to check if the equation of the reaction is balanced or not
Now, for a balanced equation of reaction, the number of atoms of the individual elements on both sides of the equation is equal
Now, let us check the atoms:
We have 1 Sr on both sides
We have 1 SO4 on both sides
We have 1 Mg on both sides
We have 2 OH on both sides
From what we can see, the equation of the reaction is balanced
Thus, the correct answer choice is B
In two atoms atom 'X' looses two electrons and atom 'Y' gains two electrons to form a compound 'XY'.Name the bond formed between X and Y.With two properties of the compound.
Please help me and i will mark you as brainleist.
Answer:
The bond formed between XY is "Ionic bond"
Explanation:
The bond is ionic bond because the compound XY is formed due to the gaining and loosing of electrons
Properties of Ionic compounds:
They form crystals
They are good insulators
They have high melting and boiling points
.
.
.
Hope it helps
A ground test utilizing an auxiliary current electrode and an auxiliary potential electrode is known as the______.
Answer:
The three-point test
Explanation:
The three-point test refers to a ground test utilizing an auxiliary current electrode and an auxiliary potential electrode.
When using a dichotomous key, it is ok to start wherever you want.
True
O False
Answer:
False
Explanation:
Pay attention to the specimens you are trying to identify with your dichotomous key. List down the characteristics that you can notice. For example, say you are trying to classify a group of animals. You may notice that some have feathers whereas others have legs, or some have long tails and others don’t.
Can someone please help !! I just need someone to help me figure out how to solve it and solve the picture as an example
The molar concentration of Al(OH)₃ in the solution is 1.61 M.
we need to calculate the number of moles of Al(OH)3 in the solution:
Number of moles of Al(OH)₃ = mass of Al(OH)3 / molar mass of Al(OH)3
Molar mass of Al(OH)₃ = (1 x atomic mass of Al) + (3 x atomic mass of O) + (3 x atomic mass of H)
Molar mass of Al(OH)₃ = (1 x 26.98 g/mol) + (3 x 16.00 g/mol) + (3 x 1.01 g/mol) = 78.00 g/mol
Number of moles of Al(OH)₃ = 62.7 g / 78.00 g/mol = 0.804 moles
Next, we need to calculate the volume of the solution in liters:
Volume of solution = 500.0 mL = 500.0 mL x (1 L/1000 mL) = 0.500 L
Finally, we can calculate the molar concentration of Al(OH)₃
Molarity = moles of solute/volume of solution in liters
Molarity = 0.804 moles / 0.500 L = 1.61 M
Therefore, the molar concentration of Al(OH)₃ in the solution is 1.61 M.
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When referring to immunity, what does the term innate imply?
the mechanism will provide defense against many different types of pathogens
the mechanism will develop based upon exposure to specific pathogens
the mechanism will be built-in and present at birth
the mechanism will be acquired over an individual's lifetime
Answer:
The answer should be A. the mechanism will provide defense against many different types of pathogens :)
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A flask contains two gases. The first gas has a pressure of 0.76 atm and the second gas has a pressure of 4,500 Pa. What is the total pressure???
Answer:
2.8
Explanation: