Recent activity by OrvalFrankla

1 answer 30 views

How does the size and chemical composition of microplastics affect their potential toxicity to marine organisms?

1 answer 38 views

What are the most commonly used pesticides in food production and what are their potential negative effects on human health due to pesticide residue buildup in the food chain?

asked Feb 21 in Environmental Chemistry

1 answer 39 views

How does the intensity of light affect the rate of photochemical reactions in a specific organic compound?

asked Feb 20 in PhotoChemistry

1 answer 54 views

What is the effect of different cations and anions on the viscosity of ionic liquids at varying temperatures?

asked Feb 19 in Physical Chemistry

1 answer 20 views

How does the coordination of metal ions within metalloenzymes influence their catalytic activity and specificity towards substrates?

asked Feb 19 in Coordination Chemistry

1 answer 27 views

How does the coordination chemistry of metalloproteins and metalloenzymes affect their biological function and activity?

asked Feb 19 in Coordination Chemistry

1 answer 44 views

How does the concentration of greenhouse gases in Earth's atmosphere affect the global temperature? Provide specific examples of greenhouse gases and their contribution to global warming.

asked Feb 19 in Environmental Chemistry

1 answer 38 views

What is the chemical reaction responsible for the formation of acid rain and how does it affect soil pH and plant growth in affected areas?

asked Feb 18 in Environmental Chemistry

1 answer 22 views

What is the balanced chemical equation for the synthesis reaction of magnesium oxide (MgO) when magnesium (Mg) reacts with oxygen gas (O2)?

answered Feb 17 in Chemical reactions

1 answer 13 views

How do persistent organic pollutants (POPs) affect the soil quality in agricultural areas and what can be done to mitigate their impact on crop production and human health?

answered Feb 14 in Environmental Chemistry

1 answer 78 views

What hybrid orbitals would you expect for the central atom in a molecule of CH3OH?

answered Feb 13 in Chemical bonding

1 answer 119 views

What is the effect of doping on the electrical conductivity of semiconductor materials used in electronic devices?

asked Feb 12 in Materials Chemistry

1 answer 36 views

How can the synthesis and characterization of new materials improve the efficiency and durability of fuel cells?

asked Feb 11 in Materials Chemistry

1 answer 40 views

How can the production process of a specific specialty chemical be optimized to increase yield and minimize waste?

answered Feb 10 in Chemical engineering

1 answer 76 views

Calculate the standard free energy change for the following redox reaction under standard conditions:2 Fe3+ (aq) + H2 (g) → 2 Fe2+ (aq) + 2 H+ (aq)Given: Standard reduction potential of Fe3+ / Fe2+ = -0.771 V Standard reduction potential of H+ / H2 = 0.00 V

asked Feb 3 in Chemical thermodynamics

1 answer 74 views

Calculate the standard enthalpy change ($\Delta H^\circ$) for the dissolution of 10.0 g of sodium hydroxide (NaOH) in 100.0 mL of water assuming that the specific heat capacity of the solution is 4.18 J g$^{-1}$ K$^{-1}$ and that the initial and final temperatures are 25.0$^\circ$C and 35.0$^\circ$C, respectively. The molar mass of NaOH is 40.0 g mol$^{-1}$.

asked Feb 3 in Chemical thermodynamics

1 answer 85 views

Calculate the polarization of a copper-silver galvanic cell in which the concentration of copper ions is 0.5 M, the concentration of silver ions is 0.1 M, and the cell is operating at a temperature of 25°C. The potential difference of the cell is measured to be 0.75 V.

answered Feb 3 in ElectroChemistry

1 answer 69 views

How does changing the pH affect the formation of the complex ion Cu(NH3)4 2+, when copper(II) sulfate and excess ammonia are mixed together? How can the equilibrium constant (Kc) be calculated for this reaction at different pH values?

asked Feb 3 in Chemical equilibrium

1 answer 106 views

How do different types of air pollutants, such as particulate matter and ozone, affect respiratory health in humans? Specifically, how can the size and composition of these pollutants influence their impact on the respiratory system, and what are the potential long-term health effects from prolonged exposure to high levels of these pollutants?

asked Jan 31 in Environmental Chemistry

1 answer 103 views

What is the composition of the volatile components in a mixture of gasoline using gas chromatography?

asked Jan 30 in Analytical Chemistry

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