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A closed flask of air 0.250l contains 5.0 puffs of particles . The pressure probe on the flask reads 93kpa. A student uses a syringe to add an additional 3.0 puffs of air through the stopper. Find the new pressure inside the flask
How much hexanol was in the sample represented by this chromatogram? ( chromatogram shows retention time for butanol to be 10 min and retention time for pentanol to be 20min.
calculate the heat change at 100 degrees Celsius and indicate whether heat was absorbed or released: a) joules to condense 10.0 g of steam; b) kilojoules to condense 76.0 g of steam; c) joules to vaporize 44.0 g of water; d) kilojoules to vaporize..
A solution of 0.264 M NaOH is used to neutralized 54.0 mL H3PO4 solutions. if 1.0 mL of NaOH is required to reach end point what is the molarity of H3PO4
for which blocks of elements are outer electrons the same asvalence electrons? for which are d electrons oftenincluded
a suppose that 10.0 mol c2h6g is confined to 4.860 dm3nbspat 27degc. predict the pressure exerted by the ethane from a
To ensure the impurity does not exceed this amount, how much water must be added to the solution before the temperature is dropped if the initial solution weighed 500 kg? How much Na2S2O2 will be generated in this process?
(a) Calculate the percent ionization of 0.00190 M acetic acid (Ka = 1.8e-05). % ionization = % (b) Calculate the percent ionization of 0.00190 M acetic acid in a solution containing 0.0710 M sodium acetate. % ionization = %
calculate the volume of air at 30 degrees celcius and 1 atm that is needed to burn completely 10 grams of propane. assume that air is 21 percent oxygen by volume
It is possible to draw a valid Lewis structure that follows the octet rule for all of the following except one. Which one cannot be drawn without violating the octet rule.
If the density of ethyl alcohol is 0.789 g/ml, how many quarts can be produced by the fermentation of 100.0 lbof sugar?
Samples of the following volatile liquids are opened simultaneously at one end of a room. If you ate standing at the opposite end of the room, list the following species in order you would smell them? Assume that your nose is equally sensitive to ..
If you have 100ml of a .1M tris buffer at PH 8.3 and you add 3.0 ml HCl what will be the new pH? (PKa of Tris = 8.3)
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