33 Pages.
103-13=90 dollars
90/3=30 pages
30 pages + 3=33
Answer: 0.65 Liters
Steps:
Divide 2.6/4 to get 0.65 Liters
Physics: each of two or more atomic nuclei that have the same atomic number and the same mass number but different energy states.
chemistry: each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.

the -7 is found there twice, so it has a multiplicity of 2
the +7 is there thrice, so it has multiplicity of 3