The calculated yield for iron sulfide was 16.8 grams but the measured yield was 11.6 g what is the percent yield?
2febr3+3na2s=fe2s3 + 6nabr

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)