Question

Find the number of moles of $BaC{O}_3$ which contain 1.5 moles of oxygen atoms.

• A. 0.5 mol
• B. 1.5 mol
• C. 3.4 mol
• D. 1.0 mol

Answer 1

The correct option is A 0.5 mol

From the molecular formula of $BaC{O}_3$,
one mole of barium carbonate contain 3 moles of O atoms.

The number of moles of barium carbonate that contain 1.5 moles of O atoms = $\frac{1\times 1.5}{3}=0.5mol$