Hydrogen is generated by passing hot steam over iron, which oxidizes to form Fe3O4 according to the following equation. 3 Fe (s) + 4 H2O (g) ⟶ 4 H2 (g) + Fe3O4 (s)
How many moles of hydrogen will form by reaction of excess steam with 335 grams of iron?
a) 447
b) 6.00
c) 16.1
d) 8.00

Noble gases are the most reactive elements on the periodic table. a. true b. false

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Give one example of a pure (exact) number and of an estimated (measured) number.