Chemistry Forum

P₄+5O₂→2P₂O₅.
I need to calculate what is the amount of 2P₂O₅ (and it is 4 mol)
The task says that there are 2mol of P₄, so that means that i need 10mol of O₂ for the reaction to happen, but how exactly do i predict that the amount of P₂O₅ is 4mol? What is the logic behind it?

It's a given number. It can also 10, 0,5 98,67 mol or others

No, the problem answer says this:

Knowing the amount of white phosphorus, the amount of phosphorus (V) oxide obtained is calculated according to the equation!
n P₂O₅=2*nP₄=2⋅2mol=4mol , but i don't understand the logic behind this. This time the given number is that the white phosphorus is 2mol.

Ok, it's a different question. Phosphorouspentoxide is existing bimolecular what means the real formula is P₄O₁₀.

The reaction is P₄ + 5 O₂ => P₄O₁₀ = 2 P₂O₅

But 4 mol is wrong, make no sense.