Unless you specify the density of the material, this question can not be answered because gallons is a volume and kg is a mass.
The density of liquid oxygen is 1.141g/cm3 in -183 degree Celsius. So, 1.141g/cm3=0.001141kg/cm3=1141kg/m3 Answer : 1141kg
About 10 gallons
781.987 gallons.
500 gallons.
92 gallons
You can fit 8 gallons in 8 gallons.
There are 3 gallons
840 half-gallons.
There are 144 gallons in 576 gallons.
There are precisely 107026920 gallons in 107026920 gallons!
7.5 gallons
7.91888967 imperial gallons = 9.51019 US gallons.