Biotic - animals anything tht is living abiotic anything tht is non-living
1.Subscript,how many hydrogen molecules there are
2.No it is not balanced,oxygen is less than represented.
Answer: the molecular formula is C10H20O
Explanation:Please see attachment for explanation
The monochloroderivatives will be obtained by substituting chemically non equivalent hydrogen with chlorine atom, one by one
So the possible monochloro derivatives of 2,4-dimethylpentane (figure 1) are shown in figure (2)