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One mole of H20(g) at 1.00 atm and 100 degrees C occupies a volume of 30.6L. When one mole of H20(g) is condensed to 1 mole of H20(l) at 1.00 atm and 100C, 40.66 kJ of heat is released. If the density of H20(l) at this temperature and pressure is .996 g/cm^3, calculate ? E for the condensation of 1 mole of water at 1.00 atm and 100 degrees C. [ H20(g) -> H20(l) ]
Calculate the concentration of the hydronium ion and then the pH in a solution that is formed by combining 300mL of 0.10 M Ca(OH)2 with 300mL of 0.10 M H2SO4? (Ka2 = 1.2 x 10^-2 for sulfuric acid).
what is the solubilty of O2 at an elevation of 12, 000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25 degrees celsius, and that the mole fraction of O2 in air is 0.209 at both 12, 000 ft and at sea level.
how many grams of sodium ion na are in 2.50 g toothpaste. a toothpaste contains 0.24 by mass sodium fluoride used to
A voltaic cell consists of an Mn/Mn2+ half-cell and a Pb/Pb2+ half-cell. Calculate [Pb2+] when [Mn2+] is 1.1 M and Ecell = 0.35 V. How about when [Mn2+] is 3.1 M and Ecell = 0.45 V. Calculate the Molarity for both situations.
4HCl + MnO2 = MnCl2 + 2H2O + Cl2 When 1.22 mol of HCl reacts with excess MnO2, how many moles of Cl2 form?
compound a c6h14 gives three different monochlorides on photochemical chlorination. one of these monochlorides is inert
A 14.31 g sample of hydrated magnesium sulfate (MgSO3• x H2O) is heated to remove the water of crystallization and 6.99 g of anhydrous magnesium sulfate (MgSO4) remains.
Many cigarette lighters contain liquid butane. Using standard enthalpies of formation, calculate the quantity of heat produced when 5.00 g of butane is completely combusted in air under standard conditions.
Write the element symbol and charge. How many unpaired electrons are there in the ground state of this ion
A graduated cylinder contains 148 of water. A 17.0 piece of iron (density = 7.86 ) and a 19.0 piece of lead are added. What is the new water level in the cylinder?
element x a member of group 5a forms two chlorides xcl3 and xcl5. reaction of an excess of cl2 with 8.729g of xcl3
A 0.050 M H2S solution contains 0.20 M NiCl2 and 0.35 M Hg(NO3)2. What pH is required to precipitate the maximum amount of HgS but none of the NiS
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