... amount of space that matter occupies. C.how fast the particles of matterare moving. D.the number of particles or amount of matter
Answers (1)
A) Density is mass per volume. <-- your answer!
B) is volume = length cubed, C) is velocity = distance per time, D) is mole = SI unit for amount of substance that contains as many representative particles, e.g., atoms, molecules, ions, electrons, or photons, as there are atoms in 12 grams of carbon-12.
[Source: Wikipedia]