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An oxygen enriched air, which contains at least 50% by volume pure oxygen, has been sold by a company. To test their claim, a 1000 mL glass bulb was filled with the gas to a total pressure of 750 mm Hg at 68°F. The weight of the gas sample was found to be 1.236 g. What is the exact volume percent of oxygen gas in the mixture?
What is the molaity of a solution prepared by dissolving 75.8 of ethylene glycol, HOCH2CH2OH, in 1.45 L of water? assume the density of water is 1.00 g/mL.
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added)?
Calculate the volume of a .1 M solution of HCl required to neutralize 100 mL of a saturated calcium carbonate solution
A river contains 10.5 mg/L of dissolved silica. The measured pH = 6.5 and the water temperature is 25 degrees Celcius. Calculate the concentration of each silica species in solution.
What is the percent yield of elemental sulfur if 7.54 grams of sulfur are obtained from the reaction of 6.16 grams of SO2 with an excess of H2S. 2H2S + SO2---> 2H20 +3S
So hardly change with temperature, determine the temperature in K at which the spontaneity of this reaction changes.
How many moles of CF4 can be produced when 5.00 mol C react with 8.00 mol F2?
How many grams of methane must be combusted to heat 1.15 of water from 26.0 to 87.0, assuming as a product and 100% efficiency in heat transfer?
what is the net ionic equation for lead ii nitrate magnesium
A 20.0 ml sample of 0.200 M Hbr solution is titrated with 0.200M of NaOH solution. Calculate the pH after 16 ml of NaOH has been added.
1. use your value for the heat of neutralizationdeltah1-158.0kjmol to determine the amount of heate volved when 20.00ml
Consider the gas reaction of the formation of nitrogen dioxide from nitric oxide and oxygen. If 9.0 L of NO are reacted with excess oxygen gas at STP, what is the volume in microliters (use proper scientific notation) of the nitrogen dioxide produ..
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