What mass of water would you need to evaporate
What mass of water would you need to evaporate from your skin in order to dissipate 1.7 x 10^5 J of heat from your body? H2O(l) -> H2O(g) delta H vaporation = 40.7 KJ/mol.
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Solution contains FeCl3 = 0.015 M and NaOH = 0.010 M. Solution of FeCl3(aq) + 3NaOH(aq) -> Fe(OH)3(S) + 3NaCl(aq) gives precipitate Fe(OH)3. Qsp = [Fe3+] [OH]^3 = 1.5 * 10^-8 and Ksp of Fe(OH)3 = 1.6*10^-39.
Sulfuric acid reacts with aluminum hydroxide by double replacement. Determine the mass of each product formed. Assume 100% yield.
Describe the basic steps involved in a gravimetric analysis. How does this procedure help us determine the identity of a compound or the purity of a compound if its formula is unknown?
The gas pressure measured at 20.0 degrees C is 1.95 atm. Assuming ideal gas behavior, how many grams of ammonia are in the flask?
Calculate the ΔH for the reaction above using the data provided. (Hint: you need to calculate q rxn then convert it into kJ/mole)
A balloon filled with 27.3 mol helium has a volume of 612. L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is increased to 33.0°C as it expands to a volume of 686. L, the pressure remaining constant.
A sample of hydrogen was collected over water at 23oC and an atmospheric pressure of 735 mmHg. What is the pressure of the hydrogen gas collected in a 568 mL container?
What is the freezing point in Celsius of a solution prepared by dissolving 6.20 g of MgCl2 in 110 g of water? The value of Kf for water is 1.86 (C*kg)/mol), and the van't Hoff factor for MgCl2 is i = 2.7.d
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