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What is the formal charge of the nitrogen (N) atom in the molecule of ammonia (NH3)?

asked Mar 1 in Chemical bonding by TheScientist (138k points)

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What experimental techniques can be utilized to identify the type of inorganic solid present in a given sample (ionic, covalent, or metallic)? Provide a detailed explanation of each technique and its corresponding results.

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the molar mass of magnesium chloride (MgCl2)? Show the calculation method.

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the activation energy for the electrochemical reaction that occurs when zinc metal is oxidized to form Zn2+ ions in a solution containing HCl? Calculate the activation energy at 25°C from the experimental data obtained from the Tafel plot.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What experimental factors affect the effectiveness of sunscreen agents in providing protection against UV radiation?

asked Mar 1 in PhotoChemistry by TheScientist (138k points)

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What are the key factors that make it difficult for students to understand the periodic table and chemical elements, and what strategies can be employed to overcome these difficulties and improve comprehension?

asked Mar 1 in Chemical education by TheScientist (138k points)

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What is the rate of reaction when 2 mol of hydrogen gas (H2) react with 1 mol of oxygen gas (O2) to form 2 mol of water (H2O) in 10 minutes at a constant temperature and pressure of 1 atm?

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What is the formal charge of sulfur (S) in SO4^(2-)?

asked Mar 1 in Chemical bonding by TheScientist (138k points)

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How does the Wagner-Meerwein rearrangement occur and what are its key characteristics? Explain with the help of a specific example from organic chemistry.

asked Feb 28 in Organic Chemistry by TheScientist (138k points)

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What is the cathodic Tafel slope of a zinc electrode immersed in a solution of 0.1 M Zn2+ ions at 25°C, when the current density is 50 mA/cm²? The exchange current density for this reaction is known to be 1.2 x 10^-6 A/cm².

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What is the theoretical yield of 2,4-dinitrobenzoic acid that can be obtained from the reaction between 5 grams of benzoic acid and an excess of nitric acid, assuming a 100% reaction efficiency?

asked Mar 1 in Chemical synthesis by TheScientist (138k points)

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What is the diffusion coefficient of a solute with a molecular weight of 100 g/mol in water at 25°C, when the solute concentration is 0.01 M and the diffusion rate is 1.5 × 10^-5 cm^2/s?

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

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How can we design a polymer-based sensor that accurately detects the presence of heavy metals in water samples?

asked Mar 1 in Polymer Chemistry by TheScientist (138k points)

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What is the heat capacity of 20 grams of water if it is heated from 25°C to 50°C?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the standard enthalpy change for the reaction N2(g) + 3H2(g) → 2NH3(g) at 298 K, given that the standard enthalpy of formation of NH3(g) is -46.1 kJ mol-1?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the balanced redox equation for the reaction between iron(II) chloride and potassium permanganate in acidic solution?

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What is the balanced half-reaction for the oxidation of ethanol (C2H5OH) to acetic acid (CH3COOH) and what is the oxidation state change of carbon in this reaction?

asked Mar 1 in Organic Chemistry by TheScientist (138k points)

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What is the corrosion rate of a copper metal in a saline environment containing 0.5 M of NaCl solution, if the mass of the copper electrode decreases by 0.5 grams after 24 hours of exposure to the solution at room temperature (25 °C)?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What is the mechanism behind thermal degradation of polyethylene and how can the stability of the polymer be improved?

asked Mar 1 in Polymer Chemistry by TheScientist (138k points)

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How can we modify the synthesis technique for carbon nanotubes to increase their purity and homogeneity?

asked Mar 1 in Materials Chemistry by TheScientist (138k points)

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