M+ e- m-1 has m lost or gained an electron?

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.

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring

State one important difference between a physical change and a chemical change?