An aqueous solution of urea has a freezing point of -0.42 °C. Predict the osmotic pressure of the same solution at 32 °C. Assume
that the molar concentration and the molality are numerically
equal. (k, = 1.86 •C/m)

One of the reactions in a blast furnace used to reduce iron is shown above. how many grams of fe2o3 are required to produce 15.5 g of fe if the reaction occurs in the presence of excess co? a.11.1 g b.22.1 g c.30.0 g d.44.2 g

Amixture with the same composition throughout is!

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves