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What is the percent yield of a reaction if 5.5 grams of product were obtained from the reaction of 7.8 grams of reactant and the theoretical yield of the product is 9.2 grams?
answered
Feb 22
in
Chemical reactions
0
votes
34
views
What is the effect of alloy composition and microstructure on the mechanical properties (such as tensile strength and ductility) of aluminum-copper alloys designed for use in aerospace applications?
answered
Feb 20
in
Materials Chemistry
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votes
37
views
What is the concentration of ammonia and heavy metals in landfill leachate and what is their impact on groundwater quality?
answered
Feb 18
in
Environmental Chemistry
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votes
27
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How does the addition of boron and nitrogen atoms affect the properties of graphene, and how can this information be used to improve the performance of electronic devices using graphene?
answered
Feb 17
in
Materials Chemistry
0
votes
74
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How can the synthesis of nanoparticles using sustainable and environmentally friendly methods be improved in order to minimize the negative environmental impact of current synthesis methods in materials chemistry?
answered
Feb 11
in
Materials Chemistry
0
votes
107
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How can the size, shape and composition of quantum dots be precisely controlled using innovative synthetic methods, and how does this affect their optoelectronic properties and potential applications in technologies such as light-emitting diodes, solar cells and bioimaging?
answered
Feb 10
in
Materials Chemistry
0
votes
96
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Calculate the standard enthalpy change for the reaction in which 50.0 mL of 1.0 M HCl is mixed with 50.0 mL of 1.0 M NaOH in a constant pressure calorimeter using the following data: the temperature of the HCl and NaOH solutions are both initially 25.0 °C, and the temperature of the mixture increases to 32.0 °C. The specific heat of the solution is 4.18 J/(g·°C) and the density of the solution is 1.00 g/mL. The reaction is: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
answered
Feb 3
in
Chemical thermodynamics
0
votes
65
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How can capillary electrophoresis be used to determine the presence and concentration of specific ions in a sample solution? Additionally, what factors affect the separation and detection of these ions in capillary electrophoresis analysis?
answered
Jan 29
in
Analytical Chemistry
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votes
84
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Calculate the enthalpy change for the oxidation of 2 moles of iron, given the standard enthalpy of formation for FeO is -272.2 kJ/mol and that of Fe2O3 is -824 kJ/mol.
answered
Jan 23
in
ThermoChemistry
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56
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Calculate the amount of heat energy released when 50 mL of 1 M hydrochloric acid (HCl) is mixed with 50 mL of 1 M sodium hydroxide (NaOH) solution. The heat of neutralization for the reaction between HCl and NaOH is -57.1 kJ/mol.
answered
Jan 23
in
ThermoChemistry
0
votes
131
views
According to Freud, when does the latency stage of psychosexual development occur?
answered
Jan 20
in
Psychology
0
votes
98
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Where does the concept of 'existential guilt' come from?
answered
Jan 20
in
Psychology
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48
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Where did the concept of social anxiety disorder originate?
answered
Jan 20
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Psychology
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68
views
Who demonstrated that there is a whole that is different from the sum of its parts?
answered
Jan 20
in
Psychology
0
votes
40
views
Who proposed the idea of the imaginary audience?
answered
Jan 17
in
Psychology
0
votes
73
views
What is the difference between the central and peripheral nervous system?
answered
Jan 15
in
Psychology
0
votes
60
views
Which muscles raise the hyoid bone, the floor of the mouth, and the larynx during deglutition?
answered
Jan 8
in
Science
0
votes
44
views
When gas particles heat up and gain energy, what do they do?
answered
Jan 8
in
Science
0
votes
114
views
What is the term for the application of science to solve problems?
answered
Jan 7
in
Science
0
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51
views
What is the process of processing used material into new ones called?
answered
Jan 7
in
Science
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