An oxide of iron 4.5g by mass was completely reduced by heating it in a certain reducing agent and 3.15g of iron was produced. calculate the empirical formula of the compound

Using the periodic table, complete the table to describe each atom. type in your answers.a ? b? c? d? e? f?

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

Is a pencil falling to the floor anon contact force, a force, or a contact force