Question

A sample of thallium(III) peroxide, Tl2(O2)3, contains 2.45 mol of thallium(III) ions. The number of moles of peroxide ions in the sample is

Answer 1

The correct answer is 3.675 moles.

Step-by-step explanation:

Based on the question, the reaction taking place is,

Tl₂(O₂)₃ ⇒ 2Tl⁺³ + 3O₂⁻²

Thus, 1 mole of thallium peroxide comprise 2 moles of thallium and 3 moles of peroxide ions.

However, based on the given question, a sample of thallium peroxide comprise 2.45 moles of thallium ions. The moles of peroxide ions present in the sample will be,

= 2.45 × 3 / 2

= 3.675 moles.

Hence, the moles of peroxide ions present in the given sample is 3.675.