How the heck do i do this

How many grams of iron can be made from 16.5 grams of fe2o3

How much mass would a mole of hydrogen molecules contain? recall that hydrogen is diatomic. g/mol

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 30° f. after one-half minute the thermometer reads 50° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.)