How many moles are in 150.0 grams of Fe2O3

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.