The given salinity is 24ppt
The relation between salinity and grams is

it means there is 24 parts of salt per 1000 parts of water
ppt: parts per thousand
Or
there is 24 grams of salt per 1000g of water
thus the value 24 ppt signifies that there is 24g of salt dissolved in 1000g or 1kg of water
In 3.8 moles of li, there are about <span>0.144071459 grams. I assume that you are talking about lithium.</span>
From ideal gas equation PV = nRT, V/T = nR/P ==> V/T = constant. Therefore V1/T1 = V2/T2 ==> 7.8/698 = V2/308. V = 3.44L {TEMPERATURE IN KELVIN = 273 + 425 AND 35 = 698 AND 308}