Calculate the number of oxygen atoms in 45.0 g of Co₂(SO₄)₃ (molar mass of Co ₂ (SO ₄ ) ₃= 405.8 g/mole).

Question

Quizplus · Accepted Answer

The compound is Co(SO4)3, which means each molecule contains 3 sulfate (SO4) groups. Each sulfate group has 4 oxygen atoms, so in total, there are 12 oxygen atoms per molecule of Co(SO4)3. The number of moles of Co(SO4)3 in 45.0 g is calculated by dividing the mass by the molar mass: 45.0 g / 405.8 g/mol = 0.111 moles. The total number of oxygen atoms is then 0.111 moles * 12 atoms/mole * Avogadro's number (6.022 × 10^23 atoms/mole) = 8.01 × 10^23 atoms.

Calculate the Number of Oxygen Atoms in 45