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34
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How does the presence of heavy metals in soil impact the growth and quality of crops, and what are the most effective methods for soil remediation to minimize the effects of contamination on agriculture?
answered
Feb 22
in
Environmental Chemistry
0
votes
27
views
What is the pKa value of acetic acid? Give a detailed explanation of the factors that affect the acidity of organic compounds with the help of acetic acid as an example.
answered
Feb 22
in
Organic Chemistry
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votes
30
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What is the optimal temperature, pressure and amount of initiator needed for the successful synthesis of polyvinyl chloride from vinyl chloride monomer?
answered
Feb 21
in
Chemical synthesis
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votes
31
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What is the effect of decreasing the pH of a solution containing iron (III) and ammonia on the equilibrium constant for the formation of the complex ion Fe(NH3)6^3+?
answered
Feb 12
in
Chemical equilibrium
0
votes
40
views
How can the mechanical and thermal properties of polymer-based composites be optimized for use in aerospace applications?
answered
Feb 7
in
Polymer Chemistry
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votes
59
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Given the balanced chemical equation: 2NO(g) + O2(g) ⇌ 2NO2(g)At a certain temperature, the concentrations of NO, O2, and NO2 are 0.4 M, 0.1 M, and 0.3 M respectively. What is the reaction quotient (Qc) for this chemical reaction? Is the reaction at equilibrium or not? If not at equilibrium, which direction will it shift to reach equilibrium?
answered
Feb 4
in
Chemical thermodynamics
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votes
67
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Determine the standard enthalpy of formation of ethanol (C2H5OH) given the following information: 1. The combustion of 1 mole of ethanol yields 1367 kJ of heat.2. The standard enthalpy of formation for CO2(g) and H2O(l) are -393.5 kJ/mol and -285.8 kJ/mol, respectively.
answered
Feb 4
in
Chemical thermodynamics
0
votes
95
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Determine the molecular geometry of the molecule CH3Cl using the VSEPR theory.
answered
Feb 4
in
Chemical bonding
0
votes
14
views
Calculate the percent composition of phosphoric acid, H3PO4.
answered
Feb 3
in
Inorganic Chemistry
0
votes
116
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How does altering the chemical structures of a drug affect its pharmacodynamics and target interaction in the human body?
answered
Jan 31
in
Medicinal Chemistry
0
votes
101
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What is the bond angle and shape of the water molecule according to the principles of quantum mechanics and molecular structure?
answered
Jan 30
in
Physical Chemistry
0
votes
92
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A chemical engineer wants to separate a mixture of ethanol and methanol using a distillation column. The feed to the column contains 30% ethanol and 70% methanol by mole. The engineer wants to obtain a distillate with 80% ethanol and a bottoms product containing no more than 1% ethanol. Determine the number of trays required in the distillation column to achieve this separation. Consider only equilibrium stages and assume that the feed is saturated liquid at its boiling point. The operating pressure of the column is 1 atm.
answered
Jan 22
in
Chemical engineering
0
votes
53
views
Who proposed the fuzzy logic theory?
answered
Jan 20
in
Psychology
0
votes
103
views
How can community-based programs support recovery?
answered
Jan 17
in
Psychology
0
votes
33
views
What is the 'medium' in media psychology?
answered
Jan 14
in
Psychology
0
votes
55
views
What is ego psychology?
answered
Jan 13
in
Psychology
0
votes
43
views
Why do electronegativities decrease from top to bottom?
answered
Jan 8
in
Science
0
votes
44
views
When using a microscope we do not see the entire extent of the sample. depending on the eyepiece and objective lens we see a restricted region which we say is this?
answered
Jan 8
in
Science
0
votes
99
views
When do homologous chromosomes separate and go to different gametes?
answered
Jan 8
in
Science
0
votes
146
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When a solid substance is involved in a chemical reaction, only the matter from which part of the solid is exposed to other reactants?
answered
Jan 8
in
Science
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