Where do you think energy in the heaters came from ?

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.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what