A solution is prepare using 76.6 g of an unknown (nonelectrolyte) dissolved in 379.6 g of water. The boiling point elevation of the solution compared to water is measured to be 0.634°C. What is the molar mass of the unknown (in g/mol)? Some possibly useful constants for water are Kf = 1.86°C/m and Kb = 0.512°C/m.

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?