Question

In a 500-pound mixture of ferric oxide, the ratio of iron to oxygen is

Answer 1

\[2 Fe _{2}O _{3}=4 Fe+3O _{2}\]
2[2*32+3*16]=4*32+6*16
2(64+48)=128+96
2*112=128+96
224=128+96
iron:oxygen::128:96
or 4:3