What is the total number of electron pairs shared between the two atoms in an 02 molecule

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.

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?