Assume 3 molecules of fe react according to the following equation. 3fe + 4h2o fe3o4 + 4h2 how many molecules of h2 are produced? how many water molecules are required? what is the mole ratio of fe to h2o? how many hydrogen molecules (h2) are involved in this reaction?

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.