How many carbon atoms are there in the following parent chain?

How many carbon atoms are present in the parent chain in the following compound ?

How many chiral carbon atoms are present in the following compound?

How many carbon atoms are present in Acetyl CoA ?

How many carbon atoms are present in aspirin ?

In the compound H_3C-undersetunderset(OH)(|)CH-CH_2-CH_2-undersetunderset(OH)(|)CH-undersetunderset(C_2H_5)(|)CH-CH_3 how many carbon atoms present in the parent chain ?

How many carbon atom presnt in the parent chain in the given following compound :