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A balloon filled with helium gas has a volume of 500ml at a pressure of 1 atm. the balloon is released and reaches an altitude of 6.5 km. where pressure is 0.5 atm. assuming that the temp has remained the same, what volume does the gas occupy at this heights?
describe the preparation of 200 mL of 1.00% (w/v) aqueous CuSO4, from a 0.218 M CuSO4 solution.
20 g of compound is dissolved in 400 mL of water. A single extraction with 100 mL of diethyl ether was performed, after which ethereal phase contained 10 g of compound. Calculate the partition coefficient.
Write the acid/base equilibrium reaction (net-ionic) for the major species present in an aqueous solution of each of the following substances. Include aggregation states. Note that this text uses H3O+.
Magnesium metal is used as a sacrificial anode to reduce the corrosion of underground storage tanks (made of iron, or more accurately, steel which is an iron/carbon alloy). As a result the sacrificial metal corrodes instead of the iron. Explain th..
Find the enthalpy of reaction for graphite going to diamond. Is this reaction exothermic or endothermic. What does it imply about the chemical bonding in diamond compared to graphite.
Write a balanced hydrolysis equation to show why solutions of aluminum chloride are acidic. (Hint; Al3+(aq) ions can be written Al(H2O)63+(aq).)
Calculate the value of q, w, delta E , for the reversible isothermal expansion at 300k of 2.00 mol of a perfect gas
Under standard conditions one of the steps of glycolosis does not occur spontaneously. Can the reaction take place in the cytoplasm of a cell where the concentrations
Exactly 100 mL of 0.15 M HNO2 is titrated with a 0.15 M NaOH solution. What is the pH at the equivalence point. The Kb of NO2- is equal to 2.2 x 10-11.
If it takes 526 J of energy to warm 7.40 grams of water by 17 degrees Celsius, how much energy would be needed to warm 7.40 grams of water by 55 degrees Celsius?
The optical rotation of a sample composed of only D-lactose is determned [a] abs = 0.99 degrees. [a]d is known to be 52.3 degrees of D-lactose.
The fatty acid esters of glycerol in #1 undergo SAPONIFICATION when treated with aqueous NaOH to form soap. From the structure of fatty acid esters of glycerol that you wrote earlier, write the structure of the corresponding soap.
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