Fe + O2 → Fe2O3 Which is a reactant in the equation above?
O Fe
O Fe, O2, and Fe2O3
O2 and Fe2O3
O Fe2O3

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

What enzyme is most important for dna replication and why?

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor