In the Eqn: [3 Fe + 2 O2 → Fe3O4], How many moles of Fe3O4 will be produced from 86.8 L of O2 at STP with an excess of Iron? SOMEONE PLEASE HELP ME WITH THIS ONE ASAP

What process did darwin’s book suggest that organisms evolve through

Drag the correct tiles to the image. not all tiles will be used. the diagram is a schematic representation of the electron transport mechanism in mitochondria. label the diagram to complete the model.

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna