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Explain a 3.0-Lsample of helium was placed in a container fitted with a porous membrane. Half of the helium effused through the membrane in 24 hours. A 3.0-L sample of oxygen was placed in an identical container. Explain how long will it take for half of the oxygen to effuse through the membrane?
What mass of potassium carbonate K2CO3, must be weighed out to prepare 125.0mL of a 0.0500M solution of salt?
It takes 46.8 hours for nitrogen-filled balloon to shrink to a quarter of its original volume by effusion though a very small hole. If the same balloon had been filled with helium,
calculate te single ion actvity coefficients for Cs^+, Cd^2+, Al^3+ and dissolved H2CO3 s a function of ionic strength
two full bottles contain respectively 1.0 kg of potassium nitrate kno3 and 1.0 kg of strontium chloride srcl2. which
The density of Toluene (C7H8) is .867 g/mL, and the density o thiophene (C4H4S) is 1.065 g/mL. A solution is made by dissolving 10.5 g of thiophene in 250 mL of Toluene.
at ordinary body temperature 37 c the solubility of n2 in water in contact with air at ordinary atmospheric pressure
Predict whether reactions should occur between aqueous solutions of the following compounds. If so, write balanced molecular and net ionic equations for the reactions. Include physical states.
What is the mass of a magnesium block that measures 2.3 cm * 3.5 cm * 1.5 cm? The density of magnesium is 1.738 g/cm^3
The probability of filling a 3p orbital relative to the 3s orbital is 3/1. Assuming that the total Mg+ population in a given atomization source is 3.5 x 10^18 ions at any given time, what would be the number of ions that are in the excited 3p stat..
In an acidic solution (with an excess of iodate), the titration of a 25 mL sample of potassium iodide required 26.51 mL of 0.0949M sodium thiosulfate titrant.
when nacl is added to a solution of agno3 a white precipitate of agcl forms. if concentrated ammonia nh3 is added to
If 10.6 ml of (±)-a-phenylethylamine (MM=121.2 d=.94) are reacted with .083moles of (+)-tartaric acid then- a) How many grams of solid NaOH (MM=40.0) are needed to convert the(-)-amine diastereomeric salt into its free amine
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