How do you convert the number of molecules of a substance to the number of moles?

a. add avogardo's number
b. subtract avogardo's number
c. multiply avogardo's number
d. devide avogardo's number

In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)