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Combustion of a 0.1000 g sample of a compound containing only carbon, hydrogen, and oxygen in excess yields 0.1953 g CO2, and 0.1000 g H2O. A separate experiment shows that the molar mass is 90 Daltons. Calculate the mass percent composition.
She pours a 50.0 mL sample of water at 345 K into the calorimeter containing a 50.0 mL sample of water at 298 K. She carefully records the final temperature of the water as 317 K. What is the value of Ccal for the calorimeter?
A 0.325 mol sample of PCl5(g) is injected into an empty 4.15 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.
a rectangular block of plastic, measuring 1.50 cm by 2.29 cm by 1.84 cm, floats in the middle of the Pacific Ocean. The volume of sea water displaced by the plastic block is 5.46 cm3. Assuming the density of the sea water is 1.025 g/mL, what is th..
How much heat (in kJ) is evolved in converting 1.20 mol of steam at 134.0°C to ice at -55.0°C.
What liquid is insoluble in water and soluble in cyclohexane and alcohol; and has a boiling pint of 58 degress Celsius at 670 mm Hg.
A cubic meter of a gravel-and-sand aquifer has been contaminated with 20 L of tetrachloroethylene. If the amount of tetrachloroethylene dissolved in aquifer water is 20 percent of its aqueous solubility,
A 4.20 g nugget of pure gold absorbed 290 J of heat. What was the final temperature of the gold if the initial temperature was 25.0°C? The specific heat of gold is 0.129 J/(g·°C).
How many milliliters of 0.105 M HCl are needed to titrate each of the following solutions to the equivalence point:-- 45.0 mL of 0.0950 M NaOH
calculate Kc for the reaction below: 2P(g)+ 5Cl2(g) 2PCl5(g) The answer provided is 240. Why is that?
What is the relationship among intracellular fluids, 0.9% (W/V) NaCl and 5.0% (W/V) glucose?
Suppose that 180 g of ethanol at 26 ? C is mixed with 225 g of ethanol at 83 ? C at constant atmospheric pressure in a thermally insulated vessel.
Gas diffusion and Viscosity are both transport properties, Derive the general relationship between the viscosity for a gas and diffusion coefficient .calculate the diffusion coefficient if Given that the viscosity of Ar is 223 micro Pascals at 29..
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