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What is the change in enthalpy (ΔH) for the combustion of methane (CH4) at standard conditions?

asked Feb 18 in Physical Chemistry by ShaunBehan45 (2.8k points)

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What concentration of lead (Pb) is considered toxic to aquatic organisms in freshwater ecosystems, and what are the factors that influence the bioavailability of lead in these systems?

asked Feb 19 in Environmental Chemistry by LeoOverby677 (2.1k points)

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How do the chemical properties and composition of polymer-based packaging materials affect their biodegradability and potential environmental impact?

asked Feb 18 in Polymer Chemistry by GarnetFjo447 (1.8k points)

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What is the bond strength of a water molecule and how can it be predicted using molecular orbital theory?

asked Feb 18 in Chemical bonding by Katja04J6453 (1.8k points)

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How does the carbon footprint of a household vary with different daily activities, such as transportation, food choices, and energy consumption, and how can individuals reduce their carbon footprint to mitigate their impact on the environment?

asked Feb 18 in Environmental Chemistry by Beatris09Q13 (1.9k points)

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How does the chemical structure of a drug affect its pharmacodynamics in the human body? Provide examples of drugs with different chemical structures and explain their specific pharmacodynamic properties.

asked Feb 18 in Medicinal Chemistry by AlfonzoGoldi (2.0k points)

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What is the concentration of a specific pesticide residue (e.g. chlorpyrifos) in a certain type of fruit (e.g. apples) that poses a potential health risk to humans, and what environmental factors may influence the levels of this residue in the fruit?

asked Feb 18 in Environmental Chemistry by AdelaideDunn (1.8k points)

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What is the hybridization of the central atom in the molecule of formaldehyde (CH2O)?

asked Feb 18 in Chemical bonding by PhilipPrisco (1.9k points)

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How does the chemical composition of natural products affect their pharmacological properties and potential medicinal use?

asked Feb 18 in Medicinal Chemistry by KentFlannaga (1.7k points)

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How does the calculation of molecular orbitals provide information about the electronic structure and chemical properties of a molecule, and how can this information be used to predict its reactivity in chemical reactions?

asked Feb 18 in Quantum Chemistry by LinCheatham (2.0k points)

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What is the chemical reaction that occurs when sodium reacts with chlorine to form sodium chloride? Write the balanced equation and include the states of matter for each reactant and product.

asked Feb 18 in Chemical reactions by ZacheryHunge (1.6k points)

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How does the chemical composition of crude oil affect the level and type of environmental damage caused by an oil spill, and what are the most effective chemical treatments for mitigating this damage?

asked Feb 18 in Environmental Chemistry by GrettaRowan (2.2k points)

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What is the effect of varying temperature on the reaction rate and reaction sustainability between two solutions of sodium thiosulphate and hydrochloric acid?

asked Feb 20 in Chemical kinetics by TiffaniWymar (1.6k points)

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How does the computational study of enzyme catalysis aid in the discovery and design of more efficient enzyme inhibitors for the treatment of diseases?

asked Feb 18 in Computational Chemistry by StacyS111358 (2.3k points)

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What is the chemical equation for the combustion of propane (C3H8) and how much oxygen (O2) is required for the complete combustion reaction?

asked Feb 18 in Chemical reactions by DKGStacy090 (2.4k points)

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How does the chemical composition and physical properties of crude oil affect its behavior and impacts on the environment during an oil spill, and what are the possible remediation strategies to mitigate the damage caused by such spills?

asked Feb 18 in Environmental Chemistry by LatashaWillc (2.7k points)

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How does the change in the stoichiometric ratio of reactants affect the rate of a chemical reaction?

asked Feb 18 in Chemical kinetics by Patsy0696347 (1.8k points)

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How does the calculation of molecular vibrational frequencies and infrared spectra help in identifying the presence of functional groups in organic molecules?

asked Feb 18 in Quantum Chemistry by MaricelaBevi (1.9k points)

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What is the optimal reaction conditions (temperature, time, and reagent amounts) that can be used to achieve the highest yield of 4-bromoacetanilide from acetanilide and bromine?

asked Feb 18 in Chemical synthesis by JeffreyCone5 (1.7k points)

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How does the chemical composition of a photosensitive material affect its photochemical properties, and how can this knowledge be used to optimize its use in photography?

asked Feb 18 in PhotoChemistry by JoannKinne38 (1.4k points)

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