A mixture of nitrogen, helium, and oxygen have a total pressure of 158 atm in a scuba tank. If the nitrogen exerts a partial pressure of 84 atm.
and the helium is at standard pressure, what is the partial pressure of the
oxygen in the tank?

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

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

the answers are

c and c