Question

(Pg = P + P + P³ + ldots + Pⁿ)

(What is the mole tion of O₂) in the mixture?
a) (P/n ⋅ P + ∑ P^i)
b) (P³/n ⋅ P + ∑ P^i)
c) (P²/n ⋅ P + ∑ P^i)
d) (P⁴/n ⋅ P + ∑ P^i)

Answer 1

The question is about finding the mole ratio of O₂ in a gas mixture using partial pressures. The correct formula to find this mole ratio is the partial pressure of O₂ divided by the total pressure of the gas mixture.

Step-by-step explanation:

The question seems to refer to the calculation of the partial pressure of oxygen (O₂) in a mixture of gases. The total pressure (Ptotal) is made up of the partial pressures of the individual gases in the mixture. According to Dalton's Law of Partial Pressures, the total pressure is the sum of the partial pressures of all gases present. Using the formula provided, if P represents the partial pressure of O₂, then the mole ratio of O₂ in the mixture would be its partial pressure (P) divided by the total pressure, which is P added to the sum of all powers of P up to n. Hence, the correct formulation to obtain the mole ratio of O₂ is (P/n · P + ∑ P^i).

For example, in chemical reactions like the synthesis reaction (a) P₄ (s) + 5O₂ (g) → 2P₂O₅ (S), and other reactions involving oxygen, understanding partial pressures and mole ratios is essential for calculation of the amounts of reactants and products.