Directions : Consider the following balanced reaction and answer the corresponding questions : C3H8 + 5O2 —> 3O2 + 4H2O 23. If you have 25 grams of propane (C3H8) how much H2O can be produced in ? (Show all calculations) A. moles ? B . grams of H2O ? C. molecules of H20 ?
24. If you conduct this same reaction in the lab with the same amount (25 grams propane) and obtain 31.6 grams of H2O what is the percent yield of H2O? ( Show calculations )

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.