1) Calculate the mass, in grams, of 3.89 x 10^22 molecules of aspirin (C9H804).
2) Phosphorus trifluoride is formed from its elements
P4 + 6F2 –> 4PH3
How many liters of fluorine are needed to react with 3.54 g of phosphorus at STP?
3) List the states (g,l,s) of CH3Oh in terms of increasing average kinetic energy.
4) A gas in a balloon at constant pressure has a voulme of 145.0 mL at -173 degrees celsius. What is its volume at 27.0 degrees celsius
5) An AlCl3 solution has a conductivity that is about twice that of a KCL solution. Explain
6) Calculate the moles and grams of solute in solution 8255 mL of .48 M NaNO3.
7) What is the freezing point of 2.03 g of Na2SO4 dissolved in 685 g of H20. (Kb = 1.86 decrees Celsius kg/mol)
Calculate the enthalpy change (in kJ) for the conversion of 2.75 of H2 to HF at constant pressure. H2 + F2 –> 2HF
H+ -465 kJ