Question

atoms and molecules are way too small to be seen, even with a microscope, so how can we count how many there are? a) you count them by volume b) you count them by mass c) you count them using an electron microscope d) you cant count atoms and molecules

Explanation:

Atoms and molecules are counted by mass using molar - mass relationships. Volume is not a direct way to count them precisely. Electron microscopes can visualize some structures but not count them accurately in a practical way for large - scale counting. And it is possible to count them indirectly through mass calculations.

Answer:

b) You count them by mass