Fe2O3 + 3H2 → 2Fe + 3H2O There are
Fe (iron) atoms.

There are
O (oxygen) atoms.

There are
H (hydrogen) atoms
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Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.

Will give ! ! widentify the advantages and disadvantages of renewable and nonrenewable energy resources.

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.