Ideal Gas Law: How Many Moles of Water (H₂O) Molecules

Ideal gas law: How many moles of water (H₂O) molecules are in a 4.00 m³ container at a pressure 8.00 × 10⁵ N/m² and temperature 600°C? The ideal gas constant is R = 8.314 J/mol ∙ K = 0.0821 L ∙ atm/mol ∙ K.

A) 7.72 × 10²⁶ mol
B) 641 mol
C) 441 mol
D) 3.86 × 10²⁶ mol
E) 2.65 × 10²⁶ mol