Why does the atmosphere allow life on planet Earth

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium