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i) The atmospheric pressur on Pluto is 3 microbars. Express this pressure in bars, kPa, atm, and torr.
ii) A scientist uses an ultra-high vacuum chamber that has a pressure of 6.5 x 10^-12 torr. If the temperature is 298 K, how many molecules are there in 2.0 cm^3? What is the molar volume, in L/mol, at that temperature.
What mass of precipitate will form if 1.50L of concentrated Pb(ClO3)2 is mixed with 0.250L of 0.290 M Nal?
Calculate the mass (g) of pure Na3AsO4 (s) and volume (mL) of 1.50 M HCl that are required to make 100.0 mL of a buffer solution at a pH of 6.80 and an H2AsO4-(aq) concentration of 0.100 M
Fe3O4(s) + 4CO(g) --> 4CO2(g) + 3Fe(s). In this reaction, if 335.2 g Fe3O4 is reacted with excess CO, what mass of CO2 will be produced.
Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more com- plicated, but this is a reasonable ?rst ap proximation.)
Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine).
A second-order reaction that destroys compound A via the reaction A to B is occurring in a batch reactor. It is 40% complete after 30 minutes. Determine the rate constant, and the time required to achieve 95% completion?
Consider the titration of 100.0 ml of .100M H2NNH2 by .200 M HNO3. Calculate the pH when the following volumes of HNO3 have been added
At 25 ºC, the vapor pressure of water is 23.8 torr. What is the vapor pressure of a solution prepared by dissolving 97.0 g of C6H12O6 (a nonvolatile solute) in 170 g of water.
A turbine operates adiabatically with super-heated steam entering at T1, and P1, with a mass flow-rate, m(dot). The exhaust pressure is P2 and the turbine efficiency is gamma
Compound A, C9H12, undergoes nitration to give 3 products. The 1H NMR spectrum of A shows a complex three-proton multiplet at 6.92-6.99 ? and a nine-proton singlet at 2.34 ?
Use the letter from the reagent table for inorganic reagents and write the IUPAC substitutive name for the bromoalkane.
A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C.
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