In any chemical reaction, the quantities that are preserved are

a. mass and the number of atoms

b. mass and moles

c. the number of moles and the volumes

d. the number of molecules and the volumes

the nuber of molecules an the volumes

In any chemical reaction, the quantities that are preserved are the number of molecules and the volumes.

So the correct answer should be D.

Hope this helps,

Davinia.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be