Login
Remember
Register
Science Q&A Sarvan.Net
All Activity
Q&A
Questions
Hot!
Unanswered
Tags
Categories
Users
Ask a Question
About Us
XML Sitemap
Terms of Service
No answer
No selected answer
No upvoted answer
Ask a Question
Recent questions without an upvoted answer
0
votes
1
answer
71
views
Analyzing the presence and concentration of heavy metals in landfill leachate and determining their impact on groundwater quality: A case study in a selected landfill site.
asked
Jan 22
in
Environmental Chemistry
by
EvieMerideth
(
2.3k
points)
0
votes
1
answer
39
views
Analyzing the levels of pesticide residues in commonly consumed fruits and vegetables and their potential health effects on humans: A case study in a specific region.
asked
Jan 22
in
Environmental Chemistry
by
MagdaMeares
(
1.8k
points)
0
votes
1
answer
62
views
Analyzing the effects of molecular weight and temperature on the flow behavior and viscosity of polymer melts using rheological measurements: a comparative study between polyethylene and polypropylene melts.
asked
Jan 22
in
Polymer Chemistry
by
RosieBloom03
(
1.8k
points)
0
votes
1
answer
24
views
An unknown compound was discovered in a crime investigation. Use mass spectrometry to identify the molecular formula and possible functional groups present in the compound.
asked
Jan 22
in
Analytical Chemistry
by
VickeyBatema
(
1.9k
points)
0
votes
1
answer
81
views
An unknown compound was analyzed using mass spectrometry, and the resulting spectrum showed a molecular ion peak at m/z 214. Fragmentation patterns were also observed with peaks at m/z 121 and m/z 93. Can you identify the unknown compound and explain the fragmentation pathways leading to the observed peaks?
asked
Jan 22
in
Analytical Chemistry
by
VenusU65079
(
1.8k
points)
0
votes
1
answer
77
views
An unknown compound is synthesized in the lab and needs to be identified using mass spectrometry. Design a step-by-step plan to analyze the compound, including sample preparation, instrument settings, interpretation of data, and identification of possible functional groups.
asked
Jan 22
in
Analytical Chemistry
by
BrodieUus47
(
1.7k
points)
0
votes
1
answer
25
views
An unknown compound is suspected to be a crystal structure of sodium chloride. Using X-ray crystallography techniques, determine if the compound is indeed a sodium chloride crystal structure and calculate the lattice parameters of the crystal.
asked
Jan 22
in
Physical Chemistry
by
ErmelindaSey
(
1.8k
points)
0
votes
1
answer
75
views
An organic compound was synthesized in the laboratory. The compound is known to contain three functional groups - an alcohol, an alkene, and an ester. Using IR spectroscopy, a broad peak was observed in the region between 3200-3400 cm^-1, which indicates the presence of the alcohol group. However, two different peaks were observed in the region between 1640-1680 cm^-1, which could correspond to either the alkene or ester group. Using other spectroscopic techniques such as NMR and mass spectrometry, determine the structure of the compound and identify which peak corresponds to the alkene or ester functional group.
asked
Jan 22
in
Organic Chemistry
by
DonnellBeckh
(
2.3k
points)
0
votes
1
answer
74
views
An industrial process involves the reaction of nitrogen gas and hydrogen gas to produce ammonia gas, in the presence of a catalyst. If the equilibrium constant for this reaction at a certain temperature is 6.2 × 10^-2 and the initial concentrations of nitrogen and hydrogen gases are 1.2 M and 0.8 M respectively, what would be the equilibrium concentrations of the reactants and products if the catalyst increases the rate of the forward reaction by a factor of 4?
asked
Jan 22
in
Chemical equilibrium
by
BlancaVennin
(
1.5k
points)
0
votes
1
answer
38
views
An electrochemical cell has a standard emf of 1.10 V and a current of 0.500 A when operating at standard conditions. What is the power output of the cell?
asked
Jan 22
in
ElectroChemistry
by
FinleySalern
(
1.6k
points)
0
votes
1
answer
74
views
An aqueous solution of 1.0 M HCl is oxidized by a lead anode in a half-cell, while a half-cell with a hydrogen electrode is used as the standard reduction potential. If the electrode potential of the lead electrode is -0.13 V, what is the cell potential of the overall reaction?
asked
Jan 22
in
ElectroChemistry
by
OrenTherrien
(
1.8k
points)
0
votes
1
answer
46
views
Ammonia and hydrochloric acid react to form ammonium chloride according to the equation: NH3(g) + HCl(g) ⇌ NH4Cl(s). If a student were to add 0.1 moles of NH4Cl to the mixture at equilibrium and the volume of the container is constant, what will be the new concentration of NH3(g) and HCl(g) in the mixture?
asked
Jan 22
in
Chemical equilibrium
by
CaraPrerauer
(
1.6k
points)
0
votes
1
answer
72
views
A zinc rod is being placed in a solution containing 0.1 M of copper (II) ions. Calculate the corrosion potential of the zinc rod in a galvanic couple with a standard hydrogen electrode at 25°C.
asked
Jan 22
in
ElectroChemistry
by
MorganMaguir
(
2.0k
points)
0
votes
1
answer
81
views
A zinc electrode was kept in a 0.1 M ZnSO4(aq) solution, and a copper electrode was kept in a 0.1 M CuSO4(aq) solution. When 1500 C of electricity was passed through the cell, how many grams of copper were deposited on the cathode? (Assume 100 % efficiency and the Faraday constant is 96500 C/mol)
asked
Jan 22
in
ElectroChemistry
by
AundreaWhitf
(
1.8k
points)
0
votes
1
answer
66
views
A zinc electrode is immersed in a 1.0 M ZnSO4 solution and connected to a platinum electrode that is immersed in a 1.0 M CuSO4 solution. If the measured potential difference of the cell is 1.10 V at 25 °C, what is the polarization of the cell?
asked
Jan 22
in
ElectroChemistry
by
TraciCoomes1
(
1.9k
points)
0
votes
1
answer
77
views
A zinc electrode is connected to a copper electrode by a wire in a beaker that has a solution of 0.1 M CuSO4 and 0.1 M ZnSO4. The initial reduction potential of the copper electrode is +0.34 V, and the initial oxidation potential of zinc is –0.76 V. What is the potential difference between the two electrodes at 298 K, and what is the rate of the electrochemical reaction when the cell operates at a current of 2.50 A?
asked
Jan 22
in
ElectroChemistry
by
OnaSchnell25
(
1.8k
points)
0
votes
1
answer
24
views
A voltaic cell consists of a standard hydrogen electrode and a copper electrode in a solution of copper(II) sulfate. The measured cell potential is 0.78 V at 25°C. If the concentration of copper(II) sulfate is 0.1 M, what is the resistance of the electrochemical cell?
asked
Jan 22
in
ElectroChemistry
by
GlenSchramm
(
1.7k
points)
0
votes
1
answer
87
views
A student wishes to prepare a buffer solution by adding 0.20 moles of acetic acid (Ka = 1.8 x 10^-5) and 0.20 moles of sodium acetate in 1 liter of solution. The student adds 0.05 moles of hydrochloric acid (HCl) to the solution. Calculate the effect of adding the buffer on the equilibrium position of the acid-base reaction and determine the new pH of the solution.
asked
Jan 22
in
Chemical equilibrium
by
ArleneLeichh
(
2.1k
points)
0
votes
1
answer
68
views
A student wishes to determine the standard reduction potential of an unknown metal electrode in a half-cell. They set up an electrochemical cell using a known standard hydrogen electrode (SHE) as the reference electrode and the unknown metal electrode as the working electrode. A voltmeter is used to measure the potential difference between the two electrodes. The reading is +0.45 V. What is the standard reduction potential of the unknown metal electrode in volts?
asked
Jan 22
in
Physical Chemistry
by
BrentAshcrof
(
1.5k
points)
0
votes
1
answer
80
views
A student wishes to determine the power output of an electrochemical cell that utilizes a half-reaction of copper oxide reducing to copper and a half-reaction of zinc oxidizing to zinc ions. The initial concentrations of the copper and zinc ions in the cell are 1.00 M and 0.10 M, respectively. The cell operates for 60 minutes at a constant rate of 0.200 A. Given that the standard cell potential is 1.10 V, calculate the power output of the electrochemical cell.
asked
Jan 22
in
ElectroChemistry
by
AlfonsoJanze
(
1.9k
points)
Page:
« prev
1
...
704
705
706
707
708
709
710
711
712
...
1000
...
next »
37.4k
questions
37.2k
answers
2
comments
16.4k
users
Categories
All categories
Science
(12.0k)
Psychology
(10.5k)
Chemistry
(14.9k)
Welcome to Sarvan Science Q&A, where you can ask questions and receive answers from other members of the community.
...