Weight of oxygen in `Fe_(2)O_(3)` and `FeO` in the simple ratio for the same amount of iron is:

Weight of oxygen in Fe_(2)O_(3) and FeO is in the simple ratio of:

A certain mixed oxide of iron contains 2.5 grams of oxygen for every 7.0 grams of iron. If it is regarded as a mixture of FeO and Fe_(2)O_(3) in the weight ratio a : b, what is a : b, (atomic weight of iron = 56)

1.0 mole of Fe reacts completely with 0.65 mole of O_(2) to give a mixture of only FeO and Fe_(2)O_(3) the mole ratio of ferrous oxide to ferric oxide is

1.0 mole of Fe reacts completely with 0.65 mole of O_(2) to give a mixture of only FeO and Fe_(2)O_(3) the mole ratio of ferrous oxide to ferric oxide is

Out of haematite (Fe_(2)O_(3)) and iron pyrites (FeS_(2)) , which one is the ore of iron ?

The standerd enthalpy of formation of FeO and Fe_(2)O_(3) is -65 kcal "mole"^(-1) and -197 " kcal" " mole"^(-1) respectively . A mixture of two oxides containes FeO and Fe_(2)O_(3) in the mole ratio 2 : 1 . If by oxidation, it is changed into a 1 : 2 mole ratio mixture , How much of thermal energy will released per mole of the internal mixture ?

The standerd enthalpy of formation of FeO and Fe_(2)O_(3) is -65 kcal "mole"^(-1) and -197 " kcal" " mole"^(-1) respectively . A mixture of two oxides containes FeO and Fe_(2)O_(3) in the mole ratio 2 : 1 . If by oxidation, it is changed into a 1 : 2 mole ratio mixture , How much of thermal energy will released per mole of the internal mixture ?