Please someone help me I’ll give brainlist

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.

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

When the water vapor cools it condenses select a number that represents his process on the