Question

How many moles of barium carbonate will contain $1.5$ moles of oxygen atoms?

• A. $1$ mole
• B. $0.5$ mole
• C. $0.25$ mole
• D. $0.4$ mole

Answer 1

The correct option is B $0.5$ mole

$1$ molecule of barium carbonate contains three oxygen atoms.
Thus, one mole of barium carbonate will contain $3$ moles of oxygen atoms.

Therefore, $1.5$ moles of oxygen atoms are present in $\frac{1.5}{3}=0.5$ moles of barium carbonate.