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KRB pelle technique, solvents, mulls, thin film plate technique. which one of the following methods is better or which one do you prefer why?
Calculate and indicate values of nonzero formal charges. Based on formal charges, circle the preferred structure.
The decomposition of 3.32 g CaCO3 yields 1.24 g CaO. What is the percent yield of this reaction? CaCO3(s) -> CaO(s) + CO2(g)
An environmental engineer analyzes a sample of air contaminated with sulfur dioxide. To a 500. mL sample of air at 700. torr and 38°C, she adds 20.00 mL of 0.01017 M aqueous iodine, which reacts as follows:
Suppose HI at 5.00 10^-1 M, H2 at 1.00 x 10^-2 M, and I2 at 5.00 x 10^-3 M are mixed in a 5.0 L container. Calculate all concentrations at equilibruim.
A compound is found to have a molar mass of 598 g/mol. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25°C, what is the osmotic pressure of the resulting solution?
Given that the density of the gas mixture =0.312 g/L at the pressure of 0.2 atm and temperature 500 Kelvin At equilibrium. Determine the value of Kc also express your answer in units of (mol/L)?
its freezing point depression constant is 8.37*C per molal. Use your corrected average temperature (5.0*C) to find the molality of the water in the alcohol. Find the percent water in the alcohol.
A piston has an external pressure of 11.0 bar . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.570 liters.
Two seperate samples of argon gas are held seperate chambers connected with a valve in the middle. Chamber A has a bolume of 2.00 L, and contains 120 g of Ar at 650 K
KCL has the same structure as NaCl, the length of the unit cell 638 pm the denstiy of KCl is 1.984 g/cm3 and its formula mass is 74.55 amu. what is avogadro's number?
Ammonia (NH3) is widely used as a fertilizer and in many household cleaners. How much ammonia is produced when 6.32 mol of hydrogen gas react with an excess of nitrogen gas?Answer in units of mol
A 6.52 g sample of hydrocarbon compund containing only C and hydrogen produced 20.5 g of CO2. A 9.29 ml sample weighing 21.6 mg was collected over water at a pressure of 796 torr at 25 C
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