How many kilograms of liquefied gas is 50 cubic meters of natural gas equal to?
The calorific value of natural gas is 36mj / m3, that is, 50 * 36 = 1800mj
The calorific value of LPG is 41mj / kg,
Then 50 cubic meters of natural gas is equal to (1800 / 41 =) 43.9 kg