Define saturated and unsaturated fats​

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

The biosphere of the earth is made up of what compound? organic or inorganic?