Calculate the mass of iron, which will be convert, into its oxide(Fe3O4) by the action of 18g of steam on it

(A)21g (B)42g (C)64g (D)51g

1 answer

well 18g of steam is 1 mole of H2O

So, write the balanced equation to see how many moles of Fe will be used. Then get the mass from that.