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0
votes
30
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What is the effect of concentration on the reaction rate of the reaction between hydrochloric acid and magnesium? How does changing the concentration of hydrochloric acid affect the reaction efficiency and the production of hydrogen gas?
answered
Feb 22
in
Chemical kinetics
0
votes
24
views
How does the polarity of the solvent affect the rate of the photochemical reaction of a given compound when exposed to light?
answered
Feb 22
in
PhotoChemistry
0
votes
27
views
What is the most efficient and cost-effective method for producing a nitrogen-based fertilizer using the Haber-Bosch process and how can it be optimized to reduce the energy consumption of the process?
answered
Feb 21
in
Chemical engineering
0
votes
59
views
What is the hybridization of the central atom in the molecule PF5?
answered
Feb 13
in
Inorganic Chemistry
0
votes
30
views
What specific amino acid residues in a DNA-binding protein interact with specific nucleotide bases in double-stranded DNA, and what types of interactions (e.g. hydrophobic, electrostatic) are involved in regulating transcriptional activity?
answered
Feb 13
in
BioChemistry
0
votes
67
views
What is the role of glutamine synthetase in the assimilation of nitrogen in plants and bacteria?
answered
Feb 13
in
BioChemistry
0
votes
73
views
Calculate the standard enthalpy change (∆H°) for the reaction: 2HCl(aq) + Na2CO3(aq) → CO2(g) + H2O(l) + 2NaCl(aq) given that the standard enthalpy of formation (∆H°f) for NaCl(aq), H2O(l) and CO2(g) are -407.3 kJ/mol, -285.8 kJ/mol and -393.5 kJ/mol respectively.
answered
Feb 3
in
Chemical thermodynamics
0
votes
88
views
What is the boiling point of a substance with London dispersion forces and hydrogen bonding compared to a substance with only London dispersion forces, given that both substances have a similar molar mass and molecular size?
answered
Jan 30
in
Chemical bonding
0
votes
96
views
What is the concentration of iron (II) sulfate in a given solution using spectrophotometry with a known absorbance value at a wavelength of 400 nm?
answered
Jan 30
in
Analytical Chemistry
0
votes
70
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Calculate the equilibrium constant (K) for the formation of the complex ion [Fe(SCN)₂⁺] when 3.0 x 10⁻³ moles of Fe(NO₃)₃ and 1.5 x 10⁻³ moles of NaSCN are mixed in a 250 mL solution. The solution shows that the concentration of Fe(SCN)₂⁺ is 1.2 x 10⁻³ M at equilibrium.
answered
Jan 23
in
Chemical equilibrium
0
votes
22
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.
answered
Jan 22
in
Physical Chemistry
0
votes
104
views
A student wants to produce aluminum oxide (Al2O3) in the lab. Write a balanced chemical equation for the reaction between aluminum and oxygen gas to form aluminum oxide. Calculate how many grams of Al2O3 can be produced from 25 grams of aluminum reacting with excess oxygen gas.
answered
Jan 22
in
Inorganic Chemistry
0
votes
55
views
According to research, what happens when we are presented with too many choices?
answered
Jan 20
in
Psychology
0
votes
41
views
What is the social-cognitive approach?
answered
Jan 20
in
Psychology
+1
vote
45
views
Why is reliability important in experimental research?
answered
Jan 20
in
Psychology
0
votes
74
views
What is an example of a positive influence at the microsystem level according to ecological systems theory?
answered
Jan 17
in
Psychology
0
votes
66
views
Who proposed the social-cognitive theory of pain?
answered
Jan 16
in
Psychology
0
votes
55
views
What is the role of the hippocampus in memory?
answered
Jan 14
in
Psychology
0
votes
96
views
What two layers is the skin made of?
answered
Jan 8
in
Science
0
votes
17
views
What term describes waves that travel through matter?
answered
Jan 7
in
Science
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