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A 248 gas sample has a mass of 0.433 g at a pressure of 745 mm Hg and a temperature of 28 C. What is the molar mass of the gas?
Explain how does unique physical and chemical properties of water contribute to significance of water for life on Earth to survive.
How much energy (heat) is released when 1.52 moles of H2 reacts with 0.68 moles of Cl2 to create HCl(g) if the ΔHrxn = -184.6 kJ.
you add 1.65L of water to 112g of sodium acetate. what is the molarity of the sodium acetate in the solution
Calculate the specific rotation of the compound. A sample of 150 mg of an organic compound is dissolved in 7.5 ml of water. The solution is paced in a 20-cm polarimeter tube and the rotation measured in a polarimeter
Preparing solutions for biochemical experiments, In preparation for a protein purification experiment, you have been asked to prepare 100 mL of an aqueous solution of Tween20
Calculate the diffusion limiting current for the oxidation of an organic compound at an electrode in stagnant solution. Assume 6 electrons are involved in the reaction (n=6). C(org) = 0.01 M, D(org) = 2x10^-5 cm^2/s.
The specific heat of silver is 0.235 J/g·K. Its melting point is 962°C, and its heat of fusion is 11.3 kJ/mol. What quantity of heat, in joules, is required to change 7.50 g of silver from solid at 25°C to liquid at 962°C?
The partial pressure and Henry's law constants for SO2 and H2O2 are 2.7 ppm (KH = 1.2 mol L-1atm-1) and 4.9 ppb (KH = 1.0E5 mol L-1atm-1), respectively. Calculate the reaction rate of this process.
When 0.800 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 13C is observed.Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL.
How many moles of a monoprotic acid with a Ka=4.9x10^-6 must be dissolved in 750 ml of H2O to produce a solution with pH=4.50
if a molecule of a neon gas travels at an average of 400.m/s at a given temperature, estimates the average speed of a molucule of butane gas, C4H10, at the same temperature.
Calculate the amount of energy released by the freezing of 13.3 g of a liquid substance, given that the substance has a molar mass of 82.9 g/mol and a molar heat of fusion of 4.60 kj/mol.
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