[spqrauxo]

Gaseous cyclobutane isomerizes to butadiene in a first order process which has a k value at 160 0C of 3.3 x 10-4 s-1. How many minutes would it take for the conversion to proceed 40% to completion at this temperature?

Calculate the molarity, molality and mole fraction of ethyl alcohol in a solution of total volume 95 mL prepared by adding 50 mL ethyl alcohol (C2H5OH) (density= 0.789 g/mL) to 50 mL water (density= 1.0 g/mL) (C:12; O16; H;1 g/mol

The freezing point of a sample of napthalene was found to be 80.6 0C. When 0.512 g of a substance is dissolved in 7.03 g napthane, the solution has a freezing point of 75.2 0C. What is the molecular weight of the solute? The molal freezing point constant of napthalene is 6.80 0C kg/mol.
  can you please help me

[chenbeier]

What are your own ideas first.