Indicate whether each of the following increases, decreases, or has no effect on the rate at which 10.0 g of sugar -dissolves in a liter of water. (a) using water from the refrigerator (b) shaking the sugar and water (c) using powdered sugar rather than crystals (d) using tap water rather than distilled water

The solubility of N₂ in blood is a serious problem for divers breathing compressed air (78% N₂ by volume) at depths greater than 50 ft (see the margin note, p. 522). (a) What is the molarity of N₂ in blood at 1.00 atm? (b) What is the molarity of N₂ in blood at a depth of 50. ft? (c) Find the volume (in mL) of N₂ , measured at 25°C and 1.00 atm, released per liter of blood when a diver at a depth of 50. ft rises to the surface (kH for N₂ in water at 25°C is 7.0X10⁻⁴ mol/Latm and at 37°C is 6.2X10⁻⁴ mol/L atm; assume dof water is 1.00 g/mL).

When 100.0 g of an unknown compunf was dissolved in 1.00 kg of water, the boiling point was raised by 3.62 C. What is the molar mass of this unknown compound? (Kb for water is 0.51 C/m)

How many grams of HCl(s) are there in 300 mL of 4.50% w/v HCl(aq) solution?