4. how would you use ir to distinguish between liquid bromine (br2) and gaseous hydrogen bromide (hbr)? explain.
Answers
We would you use IR to distinguish between liquid bromine , Br₂ and gaseous hydrogen bromide HBr is that Br₂ will not show up peak in the IR spectra and HBr will sow the peak.
The IR spectra involves the dipole moment. This is reason for the difference in the liquid bromine and the gaseous hydrogen bromide. the liquid bromine is pure homoatomic molecule. does shows up the peak in the IR spectra and the and in the case oh hydrogen bromide it shows up peak because the heteroatomic molecules shows the dipole moment.
Thus, We would you use IR to distinguish between liquid bromine , Br₂ and gaseous hydrogen bromide HBr is that Br₂ will not show up peak in the IR spectra and HBr will sow the peak.
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Related Questions
Which of the following is NOT a way to prevent invasive species from becoming a bigger issue? A Stay updated on research around new invasive species in your community. B Introduce unknown species to new environments for research purposes. Educate ourselves and others on guidelines around invasive species. Read up on local environmental laws before traveling with any animals or plants.
Answers
Answer:
B
Explanation:
B
Hi can anyone help me ?
Answers
Answer:
its 4
Explanation:
2 C5H5 + Fe = Fe(C5H5)2
Answers
In the cell, amino acid molecules combine to form
Answers
Answer:
A polypeptide chain!
Explanation:
Hopefully this helps! If this wasn't the answer you were looking for please don't hesitate to comment here or private message me! Have a nice day/night! :))
Amino acids are the fundamental building blocks of proteins. In the cell, amino acid molecules combine to form polypeptide chain or protein.
What are amino acid ?The term amino acids are defined as the building block of the protein. Amino acids are the fundamental building blocks of proteins. Their molecule contains both an amino and a carboxylic group.
Alpha-amino acids are amino acids that have an amino and a carboxyl group attached to the same carbon atom, i.e., an alpha-carbon atom. Glycine, Alanine, etc.
Proteins are made up of monomers called amino acids. A protein is composed of one or more linear chains of amino acids, each of which is referred to as a polypeptide.
Thus, In the cell, amino acid molecules combine to form polypeptide chain or protein.
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Question 17 of 34
How is heat transferred when a person holds a pen that is already at body
temperature?
O A. Heat is not transferred.
B. From the pen to the hand
C. In both directions between the pen and the hand
O D. From the hand to the pen
Answers
Answer:
Maybe C but I'm doubtful about D as well
According to the collision theory, which is required for a high number of effective collisions?
a very low amount of force from colliding molecules
a very low amount of kinetic energy from colliding molecules
molecular collisions that have very specific orientations
molecular collisions with energy to overcome activation energy
Answers
Answer:
molecular collisions that have very specific orientations
Explanation:
Based on the collision theory, a high frequency of effective collision is dependent on the molecular collisions that have very specific orientations.
The collision theory suggests that for reactions to occur, there must collision between reacting particles. The number of collision is dependent on the number of collision per unit time as well as fractions of effective collision. To attain effective collision, colliding particles must be properly oriented to give the desired product.Answer:
C. molecular collisions that have very specific orientations
Explanation:
If it takes 15.0 mL of 0.40 M NaOH to neutralize 5.0 mL of HCI, what is the molar concentration of the HCI solution?
Answers
Answer:
The molar concentration of the HCl solution = 1.2 M
Explanation:
I hope this helps.
Have a good rest of your day.
What is the volume of 25.3 g of silver if the density of silver is 10.5 g/mL?
Answers
Answer:
MARK AS BRAINLIST
Explanation:
density = mass/volume
mass=25.3
density =10.5
10.5=25.3/v
v=25.3/10.5
=2.40
Where did the 2 come from?
Answers
Answer:
somewhere
Explanation:
NEED HELP!!! PLEASE, AND THANK YOU!! ^^ <3
Bentley found the notes below that he took during health science class in school. However, they are missing a title. Medical professionals are likely to give them during their career, for example, when delivering staff training. It is a good idea to use visual aids and give handouts. To be most effective, choose a topic you are familiar with, practice in advance, speak clearly, and provide opportunities for the audience to respond. What is the most accurate title for his notes? A- how to prepare a verbal report B- all about written reports C- writing professional letters D- what are oral presentations?
Answers
Answer:
a) how to prepare a verbal report
Explanation:
Answer:
a. how to prepare a verbal report
Explanation:
have a nice day!
₊˚ ‧꒰ mei ꒱ ‧₊˚
The following galvanic cell has a potential of 1.214 V at 25∘C:
Hg(l)|Hg2Br2(s)|Br−(0.10M)||MnO4−(0.10M),Mn2+(0.10M),H+(0.10M)|Pt(s)
Calculate the value of Ksp for Hg2Br2 at 25∘C.
Express your answer using one significant figure.
Answers
The value of Ksp for Hg2Br2 at 25∘C is 1.0 × 10^-12.
The given galvanic cell involves the reaction between Hg(l), Hg2Br2(s), Br−(0.10M), MnO4−(0.10M), Mn2+(0.10M), H+(0.10M), and Pt(s). The potential of the cell is given as 1.214 V at 25∘C.
To calculate the value of Ksp for Hg2Br2 at 25∘C, we can use the Nernst equation:
Ecell = E°cell - (0.0592/n) * log(Q)
Where Ecell is the cell potential, E°cell is the standard cell potential, n is the number of electrons transferred, and Q is the reaction quotient.
Since Hg2Br2 is a solid and its concentration does not appear in the reaction quotient, we can assume its activity is 1. Therefore, the reaction quotient simplifies to the concentrations of the other species involved in the cell:
Q = [Br−] / [MnO4−][Mn2+][H+]
By substituting the given concentrations and the calculated cell potential into the Nernst equation, we can solve for E°cell. Then, using the Nernst equation at equilibrium (Q = Ksp), we can solve for Ksp. In this case, the value of Ksp for Hg2Br2 at 25∘C is found to be 1.0 × 10^-12, rounded to one significant figure.
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Calculate the magnitude L of the orbital angular momentum, in multiples of ℏ, of an electron in the atomic orbital 5p. L= Consider a sample of cerium atoms prepared in the absence of an external magnetic field. What is the average value ⟨Lz⟩, in multiples of ℏ, of the z-component of the angular momentum for one of the outer 4f electrons in the sample? ⟨Lz⟩=
Answers
The average value ⟨Lz⟩ of the z-component of the angular momentum for one of the outer 4f electrons in a cerium atom prepared in the absence of an external magnetic field is 0.
To find the orbital angular momentum L, one must first determine the azimuthal quantum number l of the electron, which corresponds to the angular momentum quantum number. The formula for the angular momentum quantum number is L = ℏ√(l(l+1)), where ℏ is Planck's constant divided by 2π, so L is typically measured in units of ℏ.
The formula for the orbital angular momentum of an electron in the 5p atomic orbital is: L=ℏ√(l(l+1))=ℏ√(1(1+1))=ℏ√2Therefore, the magnitude L of the orbital angular momentum of an electron in the atomic orbital 5p is √2ℏ.Magnetic Moment: The magnetic moment is determined by the angular momentum of the electron, which is equal to the magnetic moment of the electron.
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an example of regulated waste that requires special disposal is
Answers
Regulated waste refers to any type of waste that poses a potential threat to human health or the environment. These wastes require special handling, treatment, and disposal in order to prevent harm. An example of regulated waste that requires special disposal is medical waste.
Medical waste is generated from healthcare facilities such as hospitals, clinics, and laboratories. This waste includes items such as used syringes, contaminated gloves, and biological specimens. Medical waste must be handled with care to prevent the spread of infectious diseases. It is typically disposed of through incineration, autoclaving, or other specialized methods that ensure the destruction of any harmful pathogens. In general, regulated waste is carefully monitored and tightly controlled to protect public health and safety.
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how do I balance this?
Answers
Answer:
4NaHCO3---->2Na2CO3+2CO2+2H2O
At which location are metamorphic rocks most likely to
form?
ОА
ов
с C
OD
the answer is B
Answers
Answer:
Yup B
Explanation:
_______is the combining capacity of an atom of an element
Answers
Answer:
valancy
Explanation:
What are the 4 different types of bonds and how are they formed?
Answers
There are four types of chemical bonds essential for life to exist: Ionic Bonds, Covalent Bonds, Hydrogen Bonds, and van der Waals interactions. We need all of these different kinds of bonds to play various roles in biochemical interactions. These bonds vary in their strengths.
To play a variety of roles in biochemical interactions, we require all of these diverse sorts of linkages. The tensile strength of these linkages varies. In chemistry, we consider the range of strengths between ionic and covalent bonds to be overlapping. This indicates that in water, ionic bonds usually dissociate. As a result, we shall consider these bonds from strongest to weakest in the following order:
Covalent is followed by ionic, hydrogen, and van der Waals.
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For the following reaction, 6.74 grams of chlorine gas are mixed with excess iron. The reaction yields 8.73 grams of iron(III) chloride .
Answers
Answer:22.22
Explanation:22.22
1. How many moles of stearic acid are contained in 0.25 mL of a 54 x 10*g/L stearic acid in hexane solution? 2. How many nm2 are there in 20.0 cm^2? 3. Calculate the surface area in nm^2 of water contained in a watch glass with a diameter of 9.0 cm·The area of a circle is calculated as A r^2 4. If a molecule of stearic acid covers an area of 0.21 nm^2, how many stearic acid molecules will it take to cover the surface of the watch glass in question 3?
Answers
Number of moles of stearic acid are 1.35 x 10^-5 moles and the number of molecules is 3.03 x 10^16 molecules.
Number of moles of stearic acid in 0.25 mL of solution, we can use the formula: moles = (volume in L) x (concentration in mol/L)
Converting 0.25 mL to L gives us: 0.25 mL x (1 L/1000 mL) = 0.00025 L
Plugging this into the formula along with the given concentration of 54 x 10^-3 mol/L gives us:
moles = (0.00025 L) x (54 x 10^-3 mol/L)
= 1.35 x 10^-5 moles of stearic acid
To convert from cm^2 to nm^2, we can use the fact that there are 10^7 nm in 1 cm: 20.0 cm^2 x (10^7 nm/1 cm)^2 = 2.0 x 10^15 nm^2
To find the surface area of the water in the watch glass, we can use the formula for the area of a circle: A = πr^2. The radius of the watch glass is half the diameter, or 4.5 cm. Plugging this into the formula gives us:
A = π(4.5 cm)^2 = 63.6 cm^2
To convert this to nm^2, we can use the same conversion factor as in question 2: 63.6 cm^2 x (10^7 nm/1 cm)^2 = 6.36 x 10^15 nm^2
To find the number of stearic acid molecules needed to cover the surface of the watch glass, we can divide the surface area of the watch glass by the area covered by one molecule of stearic acid:
=(6.36 x 10^15 nm^2) / (0.21 nm^2/molecule) = 3.03 x 10^16 molecules of stearic acid
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what is the empirical formula 63.0 g Rb and 5.90 g O.
Answers
Answer:
Explanation:
1st convert given data into % per 100wt...
Total system mass = 63.0g + 5.90g = 68.9g
%Rb = 63.0g/68.9g x 100% = 91.4% per 100wt
%O = 5.9g / 68.9g x 100% = 8.6%
Then follow the following sequence of calculations...
% => grams => moles => mole ratio => reduce to smallest whole no ratio => empirical ratio => empirical formula
%Rb = 91.4% => 91.4g/ 85.5g·mol⁻¹ =>1.069mole
%O = 8.6% => 8.6g/16g·mol⁻¹ => 0.5375mole
Rb:O => 1.069 : 0.5375
Reduce by dividing by the smaller mole value
1.069/0.5375 : 0.5375/0.5375 => 2 : 1 <=> empirical ratio
∴ Empirical Formula => Rb₂O
The initial amount of low-quality energy available from an energy resource is called its net energy.
Answers
Answer:
La cantidad de energía disponible de una fuente de energía determinada se denomina recurso energético. La escasez de recursos energéticos (petróleo, carbón y madera) en algunas de las fuentes de energía más utilizadas plantear necesidad de usar otras fuentes investigar el modo más rentable de emplearlas
Explanation:
Answer:
false
Explanation:
its the amount of high-quality energy available from a given quantity of an energy resource minus the high-quality energy needed to make the energy available.
2. A gas initially at STP is changed to 248 K. Calculate the final pressure of the gas.
Answers
Answer:
0.908 atm
Explanation:
At standard temperature and pressure, the temperature of 0 Celsius and pressure which is equal to the atmosphere, 1 atm.
= 0 Celsius
= 1 atm
Change in temperature causes a change in the pressure:
=248K
=?
Calculating the pressure, using Gay-Lusaac's law:
Convert the temperatures from Celsius to Kelvin:
=0 Celsius+273=273K
=248K
To find :
= = 0.908 atm
how many moles of H2 are required to make 10 moles of water?
Answers
Explanation:
10 moles h20 is required
10 moles of H₂ are required to make 10 moles of H₂O.
What is Stoichiometry ?Stoichiometry is an important concept which helps us use the balanced chemical equation to measures the amount of reactants and products.
What is Balanced Chemical equation ?A balanced chemical equation is chemical equation that has equal number of atoms on both sides of arrow that is reactant and product.
First we have to write the Balanced chemical equation
2H₂ + O₂ → 2H₂O
To produce 2 moles of water, 2 moles of hydrogen are required to produce 10 moles of water.
So,
\(\frac{2\ \text{moles of}\ H_2}{2\ \text{moles of}\ H_2O}\) × 10 moles of H₂O
= 10 moles of hydrogen are required.
Thus, from above conclusion we can say that 10 moles of H₂ are required to make 10 moles of H₂O.
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A 10.0 cm by 4.00 cm pool is filled with water to a depth of 2.50 cm. How many joules are needed to heat the water from 18.5oC to 32.0oC? Cp of water = 4.184 J/goC
Answers
Answer:
5648.4 Joules
Explanation:
This problem can be solved by the calorimetry formula:
Q = C . m . ΔT
where ΔT indicates the change of temperature
Final T° - Initial T°
m = mass
C = specific heat of water and Q = Heat
We do not have m, but we have the volume of water. We can obtain mass from density.
Volume of water = 10 cm . 4cm . 2.50 cm = 100 cm³
1 cm³ = 1 mL
Density of water = 1 g/mL
Therefore our 100 mL of water is the volume for 100 g. We replace data:
Q = 4.184 J/g°C . 100 g . (32°C - 18.5°C)
Q = 5648.4 Joules
Aspirin (C9H8O4) is synthesized by the reaction of salicylic acid (C7H6O3) with acetic
anhydride, C4H6O3. 2 C7H6O3 + C4H6O3 −→ 2 C9H8O4 + H2O. How much of the excess reactant is used when the reaction is complete? Answer in units of mol.
Answers
The amount of excess acetic anhydride is:Amount of excess acetic anhydride = initial amount - amount used = 0.0196 mol - 0.0145 mol = 0.0051 molTherefore, 0.0051 mol of acetic anhydride is used in the reaction.
The balanced chemical equation for the reaction of salicylic acid with acetic anhydride is given as follows: 2C7H6O3 + C4H6O3 ⟶ 2C9H8O4 + H2OIn this equation, salicylic acid (C7H6O3) is the limiting reagent and acetic anhydride (C4H6O3) is the excess reagent. The stoichiometric ratio between salicylic acid and acetic anhydride is 2:1. This means that for every two moles of salicylic acid, one mole of acetic anhydride is required. To find out how much of the excess reactant is used when the reaction is complete, we need to determine the limiting reagent and the excess reagent. We can do this by calculating the amount of product that each reactant can produce and comparing the values.Let's first calculate the number of moles of each reactant:No. of moles of salicylic acid = mass/molar mass = 2/138 = 0.0145 molNo. of moles of acetic anhydride = mass/molar mass = 2/102 = 0.0196 molTo determine the limiting reagent, we need to calculate the amount of product that each reactant can produce.
According to the balanced equation, 2 moles of salicylic acid produces 2 moles of aspirin, while 1 mole of acetic anhydride produces 2 moles of aspirin. Therefore, the amount of aspirin that can be produced from each reactant is as follows : Amount of aspirin produced from salicylic acid = 2 x 0.0145 mol = 0.0290 molAmount of aspirin produced from acetic anhydride = 2 x 0.0196 mol = 0.0392 molSince salicylic acid can produce only 0.0290 mol of aspirin, it is the limiting reagent. This means that acetic anhydride is in excess. To determine how much of the excess reactant is used, we need to subtract the amount of acetic anhydride used from the amount that was initially present. The amount of acetic anhydride used is equal to the amount of salicylic acid used, which is 0.0145 mol.
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what is the coefficient for water when the reaction is balanced in acidic solution? c,o<''e'9'li crzol-(aq) mn2 (aq) ~ c~ (aq) mnoz(s) unbalanced g
Answers
Now the equation is balanced in acidic solution, with the coefficient for water being 7.
To balance this reaction in acidic solution, we first need to add H+ ions to balance out the charge on the reactant side. The unbalanced equation is:
Cr2O7 2- (aq) + Mn2+ (aq) --> Cr3+ (aq) + MnO2 (s)
To balance the equation, we start by adding H+ ions to the left side:
Cr2O7 2- (aq) + 14H+ (aq) + Mn2+ (aq) --> 2Cr3+ (aq) + MnO2 (s) + 7H2O (l)
Now we have balanced the equation, but we need to make sure that the number of atoms of each element is the same on both sides. There are 2 chromium atoms on the left side and 2 chromium atoms on the right side, so that is balanced. There are 14 hydrogen atoms on the left side and 7 hydrogen atoms on the right side, so we need to add 7 more hydrogen atoms to the right side. We do this by adding water (H2O) to the right side:
Cr2O7 2- (aq) + 14H+ (aq) + Mn2+ (aq) --> 2Cr3+ (aq) + MnO2 (s) + 7H2O (l)
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calculate the percent yield if the theoretical yield is 50.0g of a product and the actual yield is 42.0g
Answers
Answer:
sorry
Explanation:.
Answer:
84%
Explanation:
A 38.6 kg marble slab is shown above. What is its density? Give your answer to the nearest tenth.
Answers
Answer:
Density, \(d=26.7\ g/cm^3\)
Explanation:
The attached figure shows a 38.6 kg marble slab. The dimensions of the marble slab is 23 cm × 17 cm × 4 cm
Density = mass/volume
Volume of a cuboid shape is equal to, V = 23 cm × 17 cm × 4 cm
V = 1564 cm³
Density,
\(d=\dfrac{38.6\times 10^3\ g}{1564\ cm^3}\\\\d=24.68\ g/cm^3\)
or
\(d=26.7\ g/cm^3\)
So, the density of the marble slab is \(26.7\ g/cm^3\).
Answer: 24.7
Explanation:
(REALLY NEED HELP) What refers to the amount of electric force that could be created if the electric current were to flow?
electrical energy
electrical potential
electrical charge
electrical conduction
Answers
Answer:
electrical conduction
Explanation:
Which type of reaction does this diagram represent?
A small ball heads toward a large circle labeled superscript 235 upper U. An arrow points to an irregular circle labeled superscript 236 upper U. Another arrow points to a starburst, partially overlaid by 2 blobs labeled superscript 92 upper K r and superscript 141 upper B a, and with 3 small balls heading away from the starburst.
nuclear fusion because nuclei combine to form a heavy nucleus
nuclear fission because an atom is splitting into two large fragments of comparable mass
nuclear fusion because a large amount of energy is being released
nuclear fission because the resulting products are not radioactive
Which one is the answer need this asap! and explanation please!
Answers
The diagram represents a nuclear fission reaction where a Uranium-235 nucleus absorbs a neutron, becomes unstable and splits into two fragments releasing energy and neutrons.
What is the difference between nuclear fission and nuclear fusion?Nuclear fission is the process of splitting an atomic nucleus into two or more smaller nuclei with the release of energy, while nuclear fusion is the process of combining two or more atomic nuclei into a larger nucleus with the release of energy.
How is energy released in a nuclear fission reaction?In a nuclear fission reaction, energy is released due to the conversion of a small amount of mass into a large amount of energy, in accordance with Einstein's famous equation E=mc^2. The release of energy occurs when the Uranium-235 nucleus splits into two fragments, releasing neutrons and gamma radiation in the process.
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