Answer:
Fossils are essentially clues that have been left behind by various forms of living things. They are instrumental tools for understanding the diverse groups of organisms that have inhabited our planet at one time or another. A fossil is any preserved evidence of an organism.
i guess
Explanation:
3, 9, 16 are correct! 17 should be b because buffered means that it resists change in pH
Answer:
0.33 moles
Explanation:
to find the number of moles,
moles = number of atoms / avogadro's number ie 6.02 x
moles = 2.0 x
/ 6.02 x ![10^{23}](https://tex.z-dn.net/?f=10%5E%7B23%7D)
moles = 0.33 mol
The mass would be 2 hydrogen electroydtyetes