One way to change iron ore, Fe2O3 into metallic iron is to heat it together with hydrogen. Fe203 + 3 H > 2Fe + 3 H2O (a) How many moles of iron are made from 25 moles of Fe203?

(b) How many moles of hydrogen are needed to make 30 moles of Fe?​

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong