What is the oxidation of fe in fe2o3

Answer/ explanation :

The oxidation number of Fe

In Fe2O3

To solve this problem,

The oxidation number of O is -2

Oxidation number of Fe is x

Note that there are 2moles of Fe and 3moles of O

2 Fe + (-2 * 3) = 0

2 Fe + (-6) = 0

2 Fe - 6 = 0

2 Fe = 6

Fe = 6/2

Fe = +3

Therefore, the oxidation number of Fe is +3

The sign is very important, either - or +

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.