Answers by NickolasShum

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What is the effect of changing the pH on the reaction rate between hydrochloric acid and magnesium metal, and how does this relationship vary with respect to changes in pH levels?

answered 3 days ago in Chemical kinetics

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26 views

What is the mechanism of the reaction between 2-methylpropene and hydrobromic acid in the presence of peroxide? What are the intermediates formed during the reaction and how do they contribute to the overall reaction mechanism?

answered 3 days ago in Organic Chemistry

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22 views

How does the presence of heavy metals, such as cadmium, lead, and mercury, in soil affect the growth and productivity of crops in agriculture?

answered 3 days ago in Environmental Chemistry

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24 views

How does the presence of chlorofluorocarbons (CFCs) in the atmosphere contribute to the depletion of ozone, and what are the potential consequences of this depletion on the environment and human health?

answered 3 days ago in Environmental Chemistry

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15 views

How does the presence of a reaction product affect the rate of a chemical reaction? Provide a specific example and investigate the effect of different concentrations of the product on the rate of reaction.

answered 3 days ago in Chemical kinetics

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19 views

What is the mechanism of the preparation of p-nitroaniline from aniline and nitric acid?

answered 3 days ago in Chemical synthesis

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21 views

What is the predicted bond angle in a water molecule (H2O)?

answered 3 days ago in Chemical bonding

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18 views

How does the incorporation of nanoparticles into polymer-based coatings affect their properties and performance in terms of adhesion, corrosion resistance, and durability?

answered 5 days ago in Polymer Chemistry

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What is the mechanism of electrophilic addition reaction of HBr with propene?

answered 5 days ago in Organic Chemistry

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20 views

How do the electronic properties of a molecule or material affect its behavior under light irradiation, and what are the mechanisms underlying photochemical reactions and photophysical processes in such systems, as studied in quantum chemistry?

answered 5 days ago in Quantum Chemistry

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25 views

How does the composition of landfill leachate vary with time and what impact does this have on the quality of groundwater in the vicinity of the landfill?

answered 6 days ago in Environmental Chemistry

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28 views

How does substrate concentration affect the rate of enzyme-catalyzed reactions? Provide a detailed explanation supported with experimental evidence.

answered Feb 14 in BioChemistry

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45 views

What is the hybridization of the central atom in the molecule SF6 (sulfur hexafluoride)?

answered Feb 13 in Inorganic Chemistry

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27 views

What is the net ATP yield of glycolysis and gluconeogenesis in the liver? Compare and explain the energy efficiency of both processes.

answered Feb 13 in BioChemistry

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36 views

How can the environmental impact of polymer-based packaging materials be reduced without compromising their functional properties?

answered Feb 7 in Polymer Chemistry

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31 views

How can the chemical engineering principles be applied to develop a feasible process for the large-scale production of insulin, a widely used pharmaceutical drug for the treatment of diabetes?

answered Feb 6 in Chemical engineering

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10 views

How can molecular docking studies be used to design more effective and specific drugs?

answered Feb 5 in Computational Chemistry

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29 views

How can chemical engineers design a storage and transportation system for hazardous chemicals that minimizes the risk of spills, leaks, and other accidents, while also accounting for factors such as cost, efficiency, and environmental impact?

answered Feb 4 in Chemical engineering

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61 views

Calculate the standard entropy change for the following reaction at 298 K:CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) Given the standard entropies of CH4(g), O2(g), CO2(g), and H2O(l) are 186.26 J/K/mol, 205.03 J/K/mol, 213.74 J/K/mol, and 69.95 J/K/mol respectively.

answered Feb 3 in Chemical thermodynamics

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56 views

A chemistry student needs to determine the percentage of calcium carbonate (CaCO3) present in a mixture of calcium carbonate and calcium phosphate. The student has the following information: A 1.00-gram sample of the mixture was dissolved and reacted with excess hydrochloric acid (HCl), producing 0.236 grams of carbon dioxide (CO2) gas. The balanced chemical equation for the reaction is: CaCO3 + 2HCl → CaCl2 + CO2 + H2O. The student also knows that the molecular weight of CaCO3 is 100.09 g/mol and that of Ca3(PO4)2 is 310.18 g/mol. What is the percentage of calcium carbonate in the mixture?

answered Jan 22 in Analytical Chemistry

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