Answers
Answer:
D
Explanation:
The vibration of molecules is studied using infrared spectroscopy. Infrared spectroscopy is used to study the various modes of vibration of a molecule.
Infrared spectroscopy is used to is used to identify various functional groups by observing their stretching frequencies.
For a molecule to be infrared active, the molecule must give rise to a change in the molecular electric dipole moment.
Related Questions
There is a dual equilibrium between the indicator methyl orange (Hln/In-) and acetic acid HC2H3O2(aq) and acetate NaC2H3O2. The acetic acid/sodium acetate equilibrium is:
HC2H3O2(aq)+ H2O(l) ⇌ C2H3O- (aq) + H3O+(aq)
a. How will the addition of acid (H3O+) affect this equilibrium? Explain in words how this changes the concentration of any reactants or products and then draw an arrow to show if the equilibrium shifts to the right or left.
b. How will the addition of sodium acetate NaC,H,O2 (aq) affect this equilibrium? Explain in words how this changes the concentration of any reactants or products and then draw an arrow to show if the equilibrium shifts to the right or left.
Answers
Answer:
a. Equilibrium shifts to the left.
b. Equilibrium shifts to the left.
Explanation:
Hello.
a. In this case, considering the Le Chatelier's principle which states that the addition of any product shifts the reaction towards the reactants in order to reestablish equilibrium, by the addition of H₃O⁺ we are adding a product, it means that the equilibriums shifts to the left.
b. In this case, since the addition of sodium acetate releases sodium ions and acetate ions, because it is totally ionized, such released acetate ions have the capacity to shift the equilibrium to left as it is a product as well as the H₃O⁺, therefore, adding sodium acetate shifts the equilibrium to the left, by also considering the Le Chatelier's principle.
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The light from the Sun heats a metal surface. This is an example of
A.
conduction.
B.
radiation.
C.
reflection.
D.
convection.
Answers
Answer:
radiation.
Explanation:
Radiation is a method of energy transfer in which energy can transfer through matter or through empty space. In this example, solar energy travels through empty space from the Sun, through the Earth's atmosphere, and to the metal surface. The metal surface absorbs some of the energy, which causes the surface to heat up.
When light bends or changes direction, what is happening? A interaction B movement C reflection D refraction
Answers
Answer:
D) Refraction
Explanation:
Refraction is when something is bended or when it changes directions, such as light
The light bends or changes direction when it's being refracted. So the correct option is D.
What is refraction?
The bending of a light ray when it's passing from one medium to another medium is called refraction. The bending of the ray is due to the differences in density between the two media.
The change in the direction of a wave when it's passing from one medium to another is defined as refraction. This is one of the most commonly observed phenomena in nature. The working of optical instruments like magnifying glasses, lenses, and prisms is possible due to refraction.
Also, because of the refraction of light, a person can focus light on their retina and is thus able to see. Whenever a light ray travels at an angle into a medium of different refractive indices, it always refracts. This is a change in speed which results in a change in direction.
There are two laws of refraction. They state that:
"The incident ray refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane." "The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. This is also known as Snell’s law of refraction."[tex]\frac{sin (i)}{ sin (r)} = constant[/tex]
Therefore the correct option is D.
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What is the predicted oxidation number for a Sulfur ion?
-3
-2
-1
+1
+2
+3
Answers
I believe it is -2, though I might be wrong.
(7.12F) Which of the following statement(s) is part of the cell theory?*
O A A cell is the smallest unit of life in living organisms
O B All living things are made of cells
O C All cells come from pre-existing cells
O D All of the above
Answers
How does the law of conversation of mass apply to this reaction: C2H4+O2>H2O+CO2?
Answers
Answer:
There are fewer oxygen atoms in the equation than hydrogen or carbon.
Explanation:
PLATO
If an acyclic alkane hydrocarbon contains n carbon atoms, how many hydrogen atoms must it also contain
Answers
Answer: The answer is 2n+2
Explanation:
the general formula for defining an Alkane is [tex]CnH2n+2[/tex]
Hence for each n carbon there will be 2n+2 hydrogens present in the hydrocarbon.
12. Enzymes are produced as a direct result of
which process?
1) protein synthesis
2) photosynthesis
3) respiration
4) enzymatic hydrolysis
Answers
Answer:
it is 3or4
Explanation:
and you know all you gotta d is search the test on quizzie and you can get all the answers btw
brainliest plzzz
Enzymes are produced as a direct result of a process termed; Protein synthesis.
By definition; Enzymes are specific in their action.
Enzymes are proteinous in nature and they have active sites.
It is on this basis that enzymes are inactive when they are denatured as they can no longer fit into their active sites.
Enzymes therefore are produced as a direct result of protein synthesis.
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What are two important characteristics of the silica gel and alumina that are used for column chromatography
Answers
Answer:
Two important characteristics of the silica gel and alumina that are used for column chromatography-:
Uniform particle sizeHigh specific areaExplanation:
The adsorbent must be thinly split in column chromatography to provide a well packed column that serves as a stationary step.
The silica gel and alumina qualities that render them appropriate as column chromatography adsorbents are-:
Have a uniform particle size that guarantees uniform column packaging. A highly specific area in which a rapid balance is formed between the mobile phase and the stationary phase.what year did Robert Milliken discover the electron charge?
Answers
Answer: 1909
Explanation: In 1909 Millikan began a series of experiments to determine the electric charge carried by a single electron.
Answer: 1909
Explanation:
3. The Protons in the nucleus has relevative
Charge of________
the electrons has relativie
charge of_____
Answers
Answer: The Protons in the nucleus has relevative charge of positive.
The electrons has relativie charge of negative.
Explanation: SCIENCE!
does foil keep in the heat well ?
Answers
Answer:
Explanation:
yes
Answer:
yes
Explanation:
it acts as a barrier to oxygen and can transfer heat
what is the density of an liquid if its mass is 2,909 g and its volume is 0.57 gallons
Answers
Answer:
Density of liquid = 5103.5 g/mL
Explanation:
Given data:
Density of liquid = ?
Mass of liquid = 2909 g
Volume of liquid = 0.57 gal
Solution:
First of all we will convert the volume into mL.
Volume of liquid = 0.57 gal × 3785 mL/1 gal
Volume of liquid = 2157.68 mL
Now we will calculate the density.
d = 2909 g/0.57 gal
d = 5103.5 g/mL
Question 3
1 pts
What is the molar mass of C13H21N03 (albuterol), a drug used to treat asthma?
Reminder: molar mass is always 4 numbers
g/mol
Answers
please help it's already past due
Answers
Answer:
4 nitrogen, 2 oxygen, 2 nitrous oxide
In general, which group in the periodic table contains elements with the lowest electronegativities?
A. Group 1
B. Group 2
C. Group 16
D. Group 17
Answers
What is the reaction of HC2H3O2 and NaOH.
Answers
Answer:
NaOH + HC2H3O2 → NaC2H3O2 + H2O
A compound, XY3, forms between 1 atom of element X and 3 atoms of element Y. If element X has 5 valence electrons and element Y has 7 valence electrons, what shape will it have?
Answers
why is there no such thing as single ionic molecule
Answers
The 2-methylcyclohexanol used in this experiment is a mixture of cis and trans isomers, approximately in 1:1 ratio. Which kind of mechanism can better account for the product mixture obtained from the dehydration of cis and trans-2-methylcyclohexanol mixture: E1, E2, or a combination of the two
Answers
Answer:
E1
Explanation:
A detailed mechanism of the reaction is shown in the image attached obtained from UCSB.
We can see from the mechanism that the reaction occurs via a carbocation intermediate. The transition state involves a carbcation and this is only typical of an E1 mechanism.
Furthermore, there is a 1,2-hydride shift which leads to the formation of the more stable tertiary carbocation. The products clearly indicate a rearrangement and points towards an ionic mechanism in operation.
4. Students sometimes find it necessary to conduct a 2nd, a 3rd and even a 4th weighing of the crucible at the end of the experiment. Which of these masses should be utilized to calculate the percentage of NaHCO3
Answers
Answer:
4th
Explanation:
The result of the last weighing of the crucible should be utilized when students want to calculate the percentage of NaHCO3.
This is the best option to take because it is important that the mass of the NaHCO3 remain consistent throughout the calculations so that there will be a very high degree of accuracy in the result obtained.
An atom of aluminum loses how many electrons when it forms ionic bonds with three atoms of fluorine?
A. 1
B. 2
C. 3
D. 4
Answers
Explanation: Search Results
Featured snippet from the web
Because aluminum has three, that means three fluorines can bond. The make the formula AlF3, also known as aluminum trifluoride. Each of the fluorine atoms gets an electron to fill their shell, and the aluminum loses three, giving it a filled shell too (remember, aluminum has three extra electrons).
write a balanced equation for the reaction of awueous lead (II) nitrate and potassium chromate g
Answers
Answer:
Pb(NO3)2 + K2CrO4 → PbCrO4 + 2KNO3
Explanation:
Chemical substances engages in reactions to form certain products. The reacting compounds or molecules are called reactants. According to this question, aqueous lead (II) nitrate and potassium chromate, which are both chemical compounds react together.
lead (II) nitrate has a chemical formula of Pb(NO3)2 while pottasium chromate has a chemical formula of K2CrO4. The equation and their products are as follows:
Pb(NO3)2 + K2CrO4 → PbCrO4 + KNO3
The products are KNO3 (pottasium nitrate) and PbCrO4 (lead (II) chromate).
Balancing this chemical equation, we make use of coefficients as follows:
Pb(NO3)2 + K2CrO4 → PbCrO4 + 2KNO3
The electron configuration for Helium (He) is shown below.
152
Which diagram shows the correct distribution of electrons in the electron shells of a helium atom?
1P
ON
Answers
2 electrons in the atomic shell
Further explanationHelium belongs to the noble gas group (group 18), s block and period 1
Electron configuration: 1s²
Symbol: ₂He⁴
With atomic number 2 and mass number 4, the composition of the subatomic particles is:
2 protons, 2 electrons, and 2 neutrons
2 protons and 2 neutrons make up the atomic nucleus while 2 electrons are in the atomic shell
What does this image represent? (5 points)
-Formation of ionic bonds in water
-Formation of covalent bonds in water
-Transfer of valence electrons from oxygen to hydrogen
-Sharing of valence electrons between two hydrogen atoms
Answers
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option B that is formation of covalent bonds in water.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
The given image represents the formation of covalent bonds in water. Water is a covalent compound having covalent bond between oxygen and hydrogen.
Therefore, the correct option is option B that is formation of covalent bonds in water.
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WHERE can you find the formula for density?
Answers
Answer:
The formula for density is mass divided by volume
Explanation:
hope this helps!!!
To help you remember draw D= and a heart, erase the middle of the heart and you’ll see it’s an M and a V
Also draw a triangle and draw a horizontal line down the middle on top of the line write “M” draw a vertical line under the horizontal line and in the left put D and right put V. If you want to figure out volume cover the V and you’ll see you need to divide M (mass) by D (density) and it’s very helpful!
The reaction rate is the blank with which reactant turn into Products
Answers
Answer:
the answer should be speed)
Explanation:
hope it helps like the pic by the way
In a chemical reaction is a new substance obtained? Explain your answer
Answers
The table below lists the isotope mass and isotope percent abundance of the element that is used in the production of stainless steel.
Isotope Mass % Abundance
53.938882 2.365
52.940651 9.500
51.940509 83.790
49.946046 4.345
Based on the information in this table, which element is used in the production of stainless steel?
A.
Fe
B.
Cr
C.
C
D.
Ni
Answers
Answer:
the answer is cr
Explanation:
just did this test in chemistry the answe cr as in chromium, xoxo live stream positions by ariana btw
To convert from one resonance structure to another, ________. To convert from one resonance structure to another, ________. only electrons can be moved electrons must be added only atoms can be moved electrons and atoms can both be moved neither electrons nor atoms can be moved
Answers
Answer:
To convert from one resonance structure to another, only electrons can be moved
Explanation:
The resonance structure is known as the molecular bonding system in which a hybrid, called resonance, is formed from two or more Lewis structures that have different electronic distributions. The degree of similarity and the number of resonant structures measure the stability of the compound in which it occurs.
In organic compounds, there are cases in which, from the formula recorded as a function of the Lewis structures, it is impossible to determine with precision the exact structure of a molecule. Thus, in a nitrile chloride molecule, there exist two alternative structures distinguished only based on the positions of its electrons, but not on those of its atoms.