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Why is N level is an important indicator of the health of an aquatic ecosystem? support with references (no website references)
Consider the reaction: C2H5OH (l) + 3O2 (g) --> 2 CO2 (g) + 3 H2O (l) , ?H= -1.37 x 103 kJ When a 24.8-g sample of ethyl alcohol (molar mass = 46.07 g/mol) is burned, how much energy is released as heat?
what is the vapor pressure of ethanol at 290 K when heat of vaporization is equal to 38.56 kJ/mol and the normal boiling point is 351.4?
what mass of carbon tetrachloride,CCl4, must be vaporized at 100 degrees celsius to fill a flask with a volume of 275.0 ml when the atmospheric pressure is 753.9 torr. If the experiment is repeated at the same temperature but a greater atm pressur..
hydrochloric acid was added to a 50.00 mL solution containing your sodium carbonate unknown. calculate the pH of the solution at the second equivalence point.
A sprinter set a high school record in track and field, running 200.0 m in 21.4 s. What is the average speed of the sprinter in kilometers per hour
When butanoic acid and 18O-labeled methanol react under acidic conditions, what compounds will be labeled when the reaction has reached equilibrium
ksp lead ii bromide is 6.5x10-6a whats the molar solubility of lead ii bromide in pure water?b what is the molar
The balloon ascends to an altitude of 20 km, where the pressure is 76.0mmHg and the temperature is -50 degrees C. What is the new volume, V2, of the balloon in liters, assuming it doesn't break or leak
You have diluted 9mL of nominally 6M NaOH to 500mL. What is the approximate molarity of the base.
some kcl is dissolved in water 25degc where it completely dissociates. the vapor pressure of pure water at 25degc is
If 18.4 mL of 0.800 M~rm HCl solution are needed to neutralize 5.00 rm mL of a household ammonia solution, what is the molar concentration of the ammonia?
a what is the magnitude of the average acceleration of a skier who starting from rest reaches a speed of 11.8 ms when
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