NEED HELP ASAP Iron turns to rust by the reaction 2Fe(s) + 3O₂(g) --> 2Fe₂O₃(s). Calculate the mass of iron needed to fully react with 18.0 moles of oxygen gas.

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box