How many liters of h2 gas at stp can be produced
How many liters of h2 gas at stp can be produced by the reaction of 4.60g of Na and excess water, accoring to the following equation?2Na(s) + 2H2O(l) ---> H2(g)+2NaOH(aq)
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A sample of nitrogen gas is collected over water at a temperature of 20 degrees celcius and a pressure of 1.00 atm. the volume of the collected gas is 250.0 L. what is the mass of N2 collected? (at 20 degrees celcius, the vapor pressure of water i
Calculate the number of grams of isopropyl alcohol (rubbing alcohol), C3H8O, which must be added to 275 g of water to prepare a 2.00 m solution of isopropyl alcohol.
A stock solution is prepared by adding 28 mL of 0.2 M Na3PO4 to enough water to make 76 mL. What is the PO43- concentration of 55 mL of the stock solution?
A student was asked to identify an unknown hydrate by following the procedure described in this module. After heating and cooling, a 2.752-g sample of this unknown weighed 1.941 g.
Calculate the moles of aluminum ions present in 250.0 g aluminum oxide. Acetaminophen, a common aspirin substitute, has the formula C8H9NO2.
The total pressure in the system at equilibrium is 3.0 atm. A separate measurement shows that the mole fraction of O2 at equilibrium is 0.12. (a) Write the Kp expression for this reaction.
Water's relatively high specific heat (4.184 J/g°C) makes it an ideal coolant for automobile engines. How much heat from an engine would be absorbed if 13.9 kg of cooling system water were heated from 25°C to 75°C?
An aqueous solution has a vapor pressure of 84.0 at 50 . The vapor pressure of pure water at this temperature is 92.6 . What is the concentration of in mass percent?
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