Answers
Simply counting the amount of unique hydrogens on one side of the symmetry plane will give you the number of signals these molecules emit in a 1H NMR spectrum.
How are 13c NMR peaks recognized?
No two carbons exist in the same environment exactly. The peak at slightly over 50 must be a carbon with a single bond connecting it to an oxygen. The two carbons at either end of a carbon-carbon double bond must be responsible for the two peaks at 130. The carbon in a double bond between carbon and oxygen peaks at just around 170.
Which chemical shift range does the 13c NMR have?
Compared to protons, organic molecules' 13C nuclei's chemical shifts can range up to 200 ppm, while protons' shifts only reach 12 ppm (see Table 3 for a list of typical 13C-NMR chemical shifts).
To know more about 13c NMR visit;
https://brainly.com/question/17516931
#SPJ4
Related Questions
classify each solid as a covalent, ionic, metallic, or molecular solid. drag the appropriate items to their respective bins. view available hint(s)for part a resethelp covalentdroppable ionicdroppable metallicdroppable moleculardroppable
Answers
The appropriate items to their respective bins are:
Covalent: Carbon dioxide
Ionic: Table salt
Metallic: Iron
Molecular: Sugar
What is bins?
Bins are containers used for storing and organizing items. They can be made from a variety of materials, including wood, metal, and plastic, and come in many shapes and sizes. Bins are often used in large warehouses, retail stores, and other business establishments to store and organize products, tools, and other items. In the home, bins can be used to store toys, shoes, and other items that need to be kept organized.
To learn more about bins
https://brainly.com/question/29634744
#SPJ4
What type of reaction is Cu + 2 ZnNO3 = Cu(NO3)2 + 2Zn
Answers
The type of reaction in Cu + 2 ZnNO3 = Cu(NO3)2 + 2Zn is a single replacement reaction.
What is a single replacement reaction?This is a single replacement reaction. In a single replacement reaction, one element is replaced by another element in a compound. In this case, copper is replacing zinc in the compound zinc nitrate to form copper nitrate and zinc.
It is also known as a single displacement reaction. In this reaction, an element in a compound is replaced by another element in its pure form. For example, a single replacement reaction would occur when zinc metal is placed in a solution of copper sulfate, resulting in zinc sulfate and copper metal.
Therefore, the correct answer is as given above
learn more about single replacement reaction: https://brainly.com/question/19068047
#SPJ1
Sulfite is similar to hydroxide in its behavior as a ligand: most sulfites are insoluble in water, but excess sulfite can result in the formation of a complex ion. Write the two equilibrium reactions of sulfite with the copper(II) ion that show this behavior.
Answers
Answer:
\($Cu_2+(SO_3)^2 \rightleftharpoons CuSO_3 \ (insoluble)$\)
\($Cu_2+2(SO_3)^2 \rightleftharpoons [Cu(SO_3)_2]_2 \ (soluble)$\)
Explanation:
A ligand may be defined as a molecule or an ion or that binds to the central metal atom in order to form a more coordination complex. Sulfite is one such ligand and it behaves similarly as hydroxide as a ligand.
Now, according to the question, when we react copper with sulfite ion, it forms copper sulfite. The equation is
\($Cu_2+(SO_3)^2 \rightleftharpoons CuSO_3 \ (insoluble)$\)
Now when excess of the sulfite ion is used in the reaction, we get a complex formation, which is shown by
\($Cu_2+2(SO_3)^2 \rightleftharpoons [Cu(SO_3)_2]_2 \ (soluble)$\)
The way the sulfite reacts is quite similar to hydroxide ion where they form a complex ion when hydroxide ion in excess is used in the reaction with metal cation.
A student working in the laboratory produces 6.81 grams of calcium oxide, CaO, from 20.7 grams of calcium
carbonate, CaCO3, according to the reaction CaCO3 → CaO + CO2. Calculate the theoretical yield and
the percent yield for the reaction. Show and/or explain your work.
Answers
Answer:
A. Theoretical yield of CaO is 11.59 g
B. Percentage yield of CaO = 58.76%
Explanation:
The following data were obtained from the question:
Mass of CaCO₃ = 20.7 g
Actual yield of CaO = 6.81 g
Theoretical yield of CaO =?
Percentage yield of CaO =?
The equation for the reaction is given below:
CaCO₃ —> CaO + CO₂
Next, we shall determine the mass of CaCO₃ that decomposed and the mass of CaO produced from the balanced equation. This can be obtained as follow:
Molar mass of CaCO₃ = 40 + 12 + (3×16)
= 40 + 12 + 48
= 100 g/mol
Mass of CaCO₃ from the balanced equation = 1 × 100 = 100 g
Molar mass of CaO = 40 + 16 = 56 g/mol
Mass of CaO from the balanced equation = 1 × 56 = 56 g
SUMMARY:
From the balanced equation above,
100 g of CaCO₃ decomposed to produce 56 g of CaO.
A. Determination of the theoretical yield of CaO.
From the balanced equation above,
100 g of CaCO₃ decomposed to produce 56 g of CaO.
Therefore, 20.7 g of CaCO₃ will decompose to produce =
(20.7 × 56)/100 = 11.59 g of CaO.
Thus, the theoretical yield of CaO is 11.59 g
B. Determination of the percentage yield.
Actual yield of CaO = 6.81 g
Theoretical yield of CaO = 11.59 g
Percentage yield of CaO =?
Percentage yield = Actual yield /Theoretical yield × 100
Percentage yield = 6.81/11.59 × 100
Percentage yield of CaO = 58.76%
please one more last help me on my task to go on baby corp
Answers
Answer:?
Explanation: i'm confused with this and i know i should be writing this in comments but if you can explain me the question maybe i could help you
Calculate the number of moles
309 grams of (SF)4 = how many moles of (SF)4
Answers
Answer:
2.85 mol
Explanation:
Step 1: Given data
Mass of sulfur tetrafluoride (SF₄): 309 g
Step 2: Calculate the number of moles corresponding to 309 g of sulfur tetrafluoride
To convert mass to moles we need a conversion factor: the molar mass. The molar mass of SF₄ is 108.07 g/mol.
309 g × 1 mol/108.07 g = 2.85 mol
Suppose a solution has a density of 1.87 g/mL. If a sample has a mass of 17.5 g the volume of the sample in mL is what?
Answers
We can use the formula:
Density = Mass/Volume
Rearranging the formula gives:
Volume = Mass/Density
Substituting the given values gives:
Volume = 17.5 g / 1.87 g/mL = 9.36 mL.
In the second step of the contact process, sulfur dioxide reacts with to give sulfur trioxide: 2SO₂(g) + O₂(g) = 2SO₂(g) oxygen Initially 10 mol of sulfur dioxide and four moles of oxygen are placed in a container at a specific temperature. The volume of the container is 2 dm³. The equilibrium concentration of oxygen is 0,25 mol.dm. Calculate the equilibrium constant for the reaction.
Answers
The equilibrium constant for the reaction is 0.0052.
How to solveHere are the steps to calculate the equilibrium constant for the reaction:
Write the equilibrium constant expression. The equilibrium constant expression for the reaction is:
K = \([SO3]^2 / [SO2]^2 * [O2]\)
Calculate the equilibrium concentrations of the reactants and products. The equilibrium concentration of oxygen is given as 0.25 mol.dm^3.
One can compute the equilibrium concentration of sulfur dioxide by applying the subsequent formula:
.
\([SO2] = (10 mol - 2 * 0.25 mol) / 2 dm^3 = 4.5 mol.dm^3\)
The equilibrium concentration of sulfur trioxide can be calculated using the following equation:
\([SO3] = (2 * 0.25 mol) / 2 dm^3 = 0.5 mol.dm^3\)
Substitute the equilibrium concentrations into the equilibrium constant expression and solve for K.
K = \((0.5 mol.dm^3)^2 / (4.5 mol.dm^3)^2 * (0.25 mol.dm^3)= 0.0052\)
Therefore, the equilibrium constant for the reaction is 0.0052.
Read more about equilibrium constant here:
https://brainly.com/question/3159758
#SPJ1
The United States experienced a decrease in the real GDP, high inflation, and a
rising unemployment rate. The United States
was in the middle of an economic boom
appeared to be entering a recession
was in an economic slump
was in a stagnant economic period
Answers
The United States experienced a decrease in the real GDP, high inflation, and arising unemployment rate.
The United States appeared to be entering a recession.A recession is a decline in economic activity, characterized by declining GDP, high unemployment rates, and increased unemployment benefits. Economic analysts and the media commonly use a two-quarter consecutive decline in real GDP as a definition of a recession.
The United States is considered to have entered a recession in the 1970s, which was characterized by an energy crisis, inflation, and recession. However, by the end of the decade, the economy had improved, and it entered into the 1980s with a strong economic performance.
The 1970s were a period of high inflation, low growth, and an oil crisis, which had a significant impact on the United States economy. Therefore, it can be concluded that The United States was in the middle of an economic boom before the 1970s recession and entered a recession in the 1970s due to a decrease in the real GDP, high inflation, and arising unemployment rate.
For more such questions on inflation visit;
https://brainly.com/question/28061405
#SPJ8
Will mark BRAINLIEST!!
PLEASE ANSWER I HAVE 5 MINS
Answers
Answer:
Explanation:
7A 0.2
7B cork
7C Yes because the lighter it is the more likely it will float
7D Density is one of the fundamental scientific principles of life. It can describe any everyday object. Despite its significance, students often struggle to understand what it really is. Density is a measurement of how much space or volume is packed in an object or substance.
8 property means a characteristic or trait that you can use to describe matter by observation, measurement, or combination.
Which is larger aliter or a quart?
Answers
Answer:
a liter is larger, hope that helps :)
do mixtures boil at a constant temperature
Answers
Answer:
no
Explanation:
different mixtures have different boiling and melting points
Answer:
Yes, they do.
Explanation:
To boil at a constant temperature, the vapour composition of the mixture has to account for liquid mixture composition.
And these mixtures are known as azeotropes or azeotropic mixture
\({}\)
Which of the following is NOT necessary for chemical equilibrium?
*
1 point
a closed system
reactants and products that are the same state of mater
the rate of the forward reaction matches the rate of the reverse reaction
a reversible chemical reaction
Answers
reactants and products that are the same state of matter
Select the structure that corresponds
to the molecule name:
aniline
B.
A.
-NH₂
C. both
-NH₂
Enter
Answers
Answer:
B- \(C_{6} H_{5} NH_{2}\)Explanation:
Aniline is an organic compound with the formula C6H5NH2. Consisting of a phenyl group attached to an amino group, aniline is the simplest aromatic amine.
which gas is fossil fuel
Answers
Answer:
methane
Explanation: methane is obtained from the decaying of flora and fauna mostlyunder damp
Draw an enlargement of part of the thylakoid membrane in the beaker with the solution at pH 8. Draw ATP synthase. Label the areas of high H+ concentration and low H+ concentration. Show the direction protons flow through the enzyme, and show the reaction where ATP is synthesized. State whether ATP would end up in the thylakoid or outside of it. EXplain whythe thylakoids in the experiment were able to make ATP in the dark.
The ATP would end up outside the thylakoid. The thylakoids were able to make ATP in the dark because the researchers set up an artificial proton concentration gradient across the thylakoid membrane; thus, the light reactions were not necessary to establish the H+ gradient required for ATP synthesis by ATP synthase.
Answers
During the process of ATP synthesis in the thylakoid membrane, the ATP synthesized would end up outside the thylakoid.
The reason why the thylakoids were able to make ATP in the dark is that the researchers designed and produced an artificial proton concentration gradient across the thylakoid membrane, thereby circumventing the need for the light reactions to establish the H+ gradient required for ATP synthesis by ATP synthase.
What is the role of the thylakoid membrane in ATP synthesis in chloroplasts?The thylakoid membrane within the chloroplast is the site of the light-dependent reactions of photosynthesis. The thylakoid membrane contains an enzyme called the chloroplast ATP synthase that couples the flow of protons down their electrochemical gradient to ATP synthesis.
Learn more about thylakoid membrane at: https://brainly.com/question/4976370
#SPJ1
Based on the graph, which of these conclusions is most likely correct about the period between 1800 and 1825? (3 points)
a
There was a decrease of global temperatures.
b
There was an increase of global temperatures.
c
There was severe rainfall during this period.
d
There were several earthquakes during this period.
Answers
The graph's conclusion that is most likely accurate regarding the years 1800 to 1825 is B. The temperature of the entire planet rose.
How much has global warming raised the temperature?Since 1880, the Earth's temperature has increased by an average of 0.14° F (0.08° C) per decade, or nearly 2° F overall. Since 1981, the pace of warming has increased more than double, to 0.32° F (0.18° C) every decade.
What evidence is there for global warming?Other alterations and proof of climate change are being noticed. Global ice cap and glacier mass loss, increasing sea levels, ocean acidification, and an increase in the frequency and severity of extreme weather events are a few of these.
To know more about temperature visit:-
https://brainly.com/question/15354399
#SPJ1
Identify reactions types and balancing equations
Answers
Balance the following chemical equations:
1. N2 + 3 H2 → 2 NH3
Ex: Synthesis reaction
2. 2 KClO3 → 2 KCl + 3 O2
Single Replacement reaction
3. 2 NaF + ZnCl2 → ZnF2 + 2 NaCl
Decomposition reaction
4. 2 AlBr3 + 3 Ca(OH)2 → Al2(OH)6 + 6 CaBr2
Double Replacement reaction
5. 2 H2 + O2 → 2 H2O
Combustion reaction
6. 2 AgNO3 + MgCl2 → 2 AgCl + Mg(NO3)2
Synthesis reaction
7. 2 Al + 6 HCl → 2 AlCl3 + 3 H2
Decomposition reaction
8. C3H8 + 5 O2 → 3 CO2 + 4 H2O
Combustion reaction
9. 2 FeCl3 + 6 NaOH → Fe2O3 + 6 NaCl + 3 H2O
Double Replacement reaction
10. 4 P + 5 O2 → 2 P2O5
Synthesis reaction
11. 2 Na + 2 H2O → 2 NaOH + H2
Single Replacement reaction
12. 2 Ag2O → 4 Ag + O2
Decomposition reaction
13. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O
Combustion reaction
14. 2 KBr + MgCl2 → 2 KCl + MgBr2
Double Replacement reaction
15. 2 HNO3 + Ba(OH)2 → Ba(NO3)2 + 2 H2O
Double Replacement reaction
16. C5H12 + 8 O2 → 5 CO2 + 6 H2O
Combustion reaction
17. 4 Al + 3 O2 → 2 Al2O3
Synthesis reaction
18. Fe2O3 + 2 Al → 2 Fe + Al2O3
Single Replacement reaction
Learn more about Chemical reactions, here:
https://brainly.com/question/29762834
#SPJ1
What amount of heat, in kJ, is required to vaporize 181.20 g of ethanol (C₂H₅OH)? (∆Hvap = 43.3 kJ/mol)
Answers
The amount of heat required to vaporize 181.20 g of ethanol would be 170.1 kJ.
Heat of vaporizationUsing the formula:
Q = n ∆Hvap
where:
Q is the amount of heat required to vaporizen is the number of moles of the substance∆Hvap is the molar heat of vaporization.Moles of 181.20 g of ethanol = 181.20 g / 46.07 g/mol = 3.933 mol
Substituting the values:
Q = 3.933 mol x 43.3 kJ/mol = 170.1 kJ
In other words, the amount of heat required to vaporize 181.20 g of ethanol is 170.1 kJ.
More on heat of vaporization can be found here: https://brainly.com/question/30603212
#SPJ1
Duncan takes a break from studying and goes to the gym to swim laps if swimming burns, 615,000 cal per hour, how many kilojoules does swimming burn in the same amount of time?
Answers
Krypton is a noble gas with several stable isotopes. Which of the following combinations of mass number (represented here as A) and neutrons (n) are possible as isotopes of krypton? Select all that apply:
a. A=82, n=46
b. A=84, n=48
c. A=80, n=36
d. A=86, n=49
e. A=83, n=47
Answers
These are the appropriate combinations: a. A=82, n=46 b. A=84, n=48 e. A=83, n=47
The number of protons in the aforementioned options equals 36 when the number of neutrons is subtracted from the mass number. Kr has an atomic number of 36. The isotopes mentioned above are accurate because of this. These are Kr-82, Kr-83, and Kr-84 isotopes.
One of the noble gases, Krypton (Kr, atomic number 36), has a low propensity for chemical reactions with other elements. Krypton has been divided into a total of 32 isotopes, with atomic masses ranging from 69 to 100. These six are all stable.Krypton-85, a fission byproduct, is a beta emitter with a half-life of 10.72 years. Krypton is difficult to remove from process streams because it is chemically inert. Although krypton does not penetrate bodily tissues very much, it can be breathed and have an impact on the lungs. It has a modest radiotoxicity.
To learn more about mass number visit,
https://brainly.com/question/18803094
#SPJ4
Which state of matter - solid, liquid, or gas- tends to have unique factors (different from the other two) to consider when discussing solubility
Answers
The state of matter that tends to have unique factors to consider when discussing solubility compared to the other two states (solid and gas) is the liquid state.
Which state has unique factors?Solubility refers to the ability of a substance (solute) to dissolve in a particular solvent to form a homogeneous mixture (solution). Various factors can affect the solubility of a substance, including temperature, pressure, and the nature of the solute and solvent.
In the case of liquids, the unique factor to consider when discussing solubility is often temperature. The solubility of many solid solutes in liquids generally increases with increasing temperature. This is because higher temperatures provide more energy to break the intermolecular forces between solute particles, allowing them to disperse more evenly throughout the solvent.
Learn more about solubility:
https://brainly.com/question/23946616
#SPJ1
Which statements accurately describe the rock cycle? Check all that apply.
Any type of rock can change into any other type of rock by weathering and erosion
Rocks change from one type to another in a definite order.
Rocks change slowly over time.
The rock cycle shows how the three rock types relate to one another.
Rocks last forever.
Answers
The statements that accurately describe the rock cycle are:
Rocks change from one type to another in a definite order.
Rocks change slowly over time.
What is Rock Cycle?
It illustrates how the three major types of rocks—igneous, sedimentary, and metamorphic—can be transformed from one type to another over time through various geological processes such as weathering, erosion, sedimentation, and metamorphism. The rock cycle is driven by the continuous movement of the Earth's crust and the interactions between the different components of the Earth system, such as the atmosphere, hydrosphere, and biosphere.
The rock cycle is a natural process that describes how rocks transform from one type to another over time through a series of geological processes. It is a continuous process and there is no set starting or ending point. The rock cycle is driven by various factors including heat, pressure, weathering, erosion, and geological activity.
Learn more about Rock Cycle from given link
https://brainly.com/question/22142661
#SPJ1
Answer:
A C D
Explanation:
A solution is prepared by dissolving 15 grams of sugar in 85 grams of water. How many percent of sugar is in the solution?
Answers
Answer:
15%
Explanation:
From the question given above, the following data were obtained:
Mass of sugar = 15 g
Mass of water = 85 g
Percentage of sugar in the solution =?
Next, we shall determine the mass of the solution. This can be obtained as follow:
Mass of solute (sugar) = 15 g
Mass of solvent (water) = 85 g
Mass of solution =?
Mass of solution = mass of solute + mass of solvent
Mass of solution = 15 + 85
Mass of solution = 100 g
Finally, we shall determine the percentage of the sugar in the solution. This can be obtained as follow:
Mass of solute (sugar) = 15 g
Mass of solution = 100 g
Percentage of sugar in the solution =?
Percentage = solute /solution × 100
Percentage = 15 / 100 × 100
Percentage of sugar in the solution = 15%
A nurse practitioner prepares an injection of promethazine, an antihistamine used to treat allergic rhinitis. If the stock bottle is labeled 25 mg/mL and theorder is a dose of 15.0 mg, how many milliliters will the nurse draw up the syringe? Express the volume in milliliters to two significant figures.
Answers
Explanation:
We are given: density of promethazine = 25mg/mL
: mass of promethazine = 15.0mg
\(\begin{gathered} D\text{ = }\frac{m}{V} \\ \\ \therefore V\text{ = }\frac{m}{D} \\ \\ \text{ = }\frac{15}{25} \\ \\ \text{ = 0.60 mL} \end{gathered}\)Answer:
The nurse will draw up 0.60 mL.
What is the mass of 5.35 moles of potassium phosphate
Answers
Explanation:
given
kpo4 it has molar mass of 39+31+(16*4)=134
m=n*Mm
m=5.35*134
m=716.9
what is the change in mass of A in
60 minutes?
Mass of A (g)
12.4
10.4
9.1
7.7
6.2
Time
O
15
30
45
60
Answers
Answer:
To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.
From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.
Therefore, the change in mass of A over 60 minutes is:
Final mass of A - Initial mass of A
= 6.2 g - 12.4 g
= -6.2 g
The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.
The change in mass of A over 60 minutes is -6.2 grams.
To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.
From the given information, we can see that the mass of A decreases over time.
Let's calculate the change in mass.
Initial Mass of A: 12.4 g
Final Mass of A: 6.2 g
Change in Mass of A = Final Mass of A - Initial Mass of A
= 6.2 g - 12.4 g
= -6.2 g
The change in mass of A over 60 minutes is -6.2 grams.
Note that the negative sign indicates a decrease in mass.
For such more questions on mass
https://brainly.com/question/1838164
#SPJ8
d. If you were to open the carbonated drink bottle after shaking, what would you expect to happen and why? If you were to open the water bottle after shaking, what would you expect to happen and why?
Answers
Shaking causes small bubbles, which helps the soda's carbon dioxide escape faster. The gas will gradually escape from the liquid as bubbles once the can is opened, and the soda will become "flat." The dissolved gas takes a long time to escape if the liquid is treated gently.
A unicellular, prokaryotic organism that reproduces asexually belongs to which kingdom?
Answers
Answer:
fungi
Explanation:
9. The hydrogen concentration of a solution is 5 x 10-8. What is the pH?
Answers
Answer:
pH = 7.30
Explanation:
You can find the pH using the following equation:
pH = -log[H⁺]
In this equation, [H⁺] represents the hydrogen ion concentration. You can plug the given value into the equation and solve to find the pH.
pH = -log[H⁺]
pH = -log[5 x 10⁻⁸]
pH = 7.30