A carbohydrate comes from a chain of carbon atoms with an H2O associated with each other
That force would be gravity. Gravity is what pulls any object down towards Earth due to the large mass of the Earth.
2,3,5-trimethylhexane
C9H20
Molecular weight= 128.5g/mol
CH3-CH(CH3)-CH(CH3)-CH2-CH(CH3)-CH3
