Iron forms an ionic compound with hydroxide (OH ^ - 1) , 52% of the compound by mass is Iron Find the charge on the iron ion by finding the empirical formula.

The graph indicates the running route for tobias. which best describes his run? from time 0 to 6, he went fast and then slowed down. from time 6 to 10, he was at his slowest. from time 12 to 14, he went very slow. from time 14 to 18, he went toward the starting point.

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon

If 2 molecules of one reactant combine with 3 molecules of another to produce 5 molecules of a product, then what is the representation of the reaction?