Which chemical formula shows two atoms of iron (fe) and three atoms of oxygen (o)?

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

How does science use models to gain a better understanding of concepts?

Pl what kind of reaction is this? nahco3 + h2o → co2 + naoh + h2o -composition -decomposition -single replacement -double replacement im leaning more toward single replacement. if im wrong can you explain whyy?