Nitrogen gas is collected over water at a total pressure of 740 mmHg. The volume of nitrogen collected is 55.0 mL at 16.0oC. How many grams of nitrogen gas was collected?

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.