Final answer:
The mass of hydrogen gas present in the Hindenburg was approximately 1.798 x 10^7 grams.
Step-by-step explanation:
To calculate the mass of hydrogen that was present in the Hindenburg, we can use the equation:
Mass = Volume x Density
Given that the volume of hydrogen used by the Hindenburg was 2.0 x 10^8 L and the density of hydrogen gas is 0.0899 g/L, we can substitute these values into the equation:
Mass = 2.0 x 10^8 L x 0.0899 g/L = 1.798 x 10^7 g
Therefore, the mass of hydrogen gas present in the Hindenburg was approximately 1.798 x 10^7 grams.