Yes, you can
H atoms can be added to all carbons except,
In Organic Chemistry, Carbon, C has the ability to bond with only 4 Hydrogen Atoms,
Hope you understand!
No. See explanation.
Carbon can make 4 bonds. From those bonds we can see that (counting from left to right):
first atom uses 2, so it can have 2 atoms of hydrogen,
second, third, fourth and fifth use 3 (you count bonds both left and right from the atom), so you can add one hydrogen atom to each carbon,
sixth atom uses four, so you cannot add anything here,
last atom uses 3 bonds, so you can add one hydrogen atom here.
Finally the fomula would be: