If a microscope has a 40´ objective lens in place and a 15´ ocular lens, the total magnification of the microscope system under these conditions is

600`

Explanation:

The total magnification of a microscope is obtained by multiplying the magnifying power of the ocular lens and that of the objective lens.

Mathematically.

Total magnification = ocular magnification x objective magnification

In this case, ocular magnification = 40`, objective magnification = 15`

Total magnification of the microscope system = 40 x 15

                 = 600`

Hence,  the microscope system under these conditions would be 600`.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex