PLEASE HELP Describe at least two advantages and two disadvantages of using hydropower as a source of energy.
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What is the ph of a solution with a concentration of 5.2 × 10–8 m h3o+?

Noble gases are the most reactive elements on the periodic table. a. true b. false

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.