How many moles of water are produced if 5.43 mol PbO2 are consumed?

10.86 moles of water are produced

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

Pb + PbO₂ + 2H₂SO₄ ⇒ 2PbSO₄ + 2H₂O ( a car battery reaction)

From the equation :

mol ratio PbO₂ : H₂O = 1 : 2⇒ 1 mol PbO₂ produces 2 mol H₂O

so for 5.43 mol PbO₂ consumed,  mol H₂O :

it is the most commonly accepted one