Determine the mass of hydrogen air filling the balloon with a volume of 1500 m3.

Initial data: V (volume of the balloon with hydrogen) = 1500 m3.

Reference values: ρ (value of hydrogen density under normal conditions) = 0.0899 kg / m3.

The mass of hydrogen that fills the balloon is calculated by the formula: m = ρ * V.

Calculation: m = 0.0899 * 1500 = 134.85 kg.

Answer: It took 134.85 kg of hydrogen to fill the balloon.

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