All living organisms are made out of cells. Select three cell parts that all cells contain. a. mitochondria
b. ribosomes
c. nuclei
d. cell walls
e. DNA
f. cell membranes

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.