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A sample of sodium reacts completely with 0.142kg of chlorine, forming 234g of sodium chloride. What mass of sodium reacted?
If a solution of sea water was found to have a molarity of .26 m, what is the new freezing point of this water? (Kf = 1.86 degrees C/M)
How many moles of Ba(OH)_2 are present in 255 mL of 0.800 it M Ba(OH)_2?
An unknown gas Q effuses 1.26 times as fast under the same conditions as Xe gas. What is the molar mass (g/mol) of Q?
Calculate the molar mass of an unknown solid (assume a non nonelectrolyte) if 1.35 grams of the solid was dissolved in 15.0 grams of dodecanol and caused a freezing point depression of 2.34 degrees Celsius.
Suppose that the observed melting point range of a solid was originally 150-160 °C, but this became 145-145.5 °C after recrystallization. How might you account for this observation
Suppose that 35.47 g of ice at -13.7°C is placed in 46.51 g of water at 96.7°C in a perfectly insulated vessel. Calculate the final temperature.
Consider the decomposition of calcium carbonate. Assume that ?H° = 177.8 kJ/mol and ?S° = 160.5 J/K·mol for the temperature range.
an auto mechanic spills 83mL of 2.6M H2SO4. How many milliliters of 1.2M of NaHCO3 must be poured on the spill to react completely with the sulfuric acid?
Treatment of (S)-( )-5-methyl-2-cyclohexenone with lithium dimethylcuprate gives, after protonolysis, a good yield of a mixture containing mostly a dextrorotatory ketone A and a trace of an optically inactive isomer B
Predict the major product of the reaction between N-propylacetamide and sodium benzoate upon heating at 140C
What is the lone pair?
We irridate an unknown atomic system, in the gas phase, with monochromatic UV radiation of wavelength 0.605x10^-7m and observe a sharp absorption line. All other absorption lines have higher wavelength.
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