Pyramids were built in Ancient Egypt as tombs, or burial places, for Egyptian pharaohs, or kings. They believed that the pyramids made you immortal. The Ancient Egyptians believed in an afterlife, so it was very important to them to protect the bodies of their pharaohs.
CaCO3, or calcium carbonate, has a molar mass of 100.09 grams per mole. This means there are roughly 566 grams of CaCO3.
# Ca atoms = (.75 moles)(6 x 10 23 atoms/mole) = 4.5 x 10 23 atoms. # P atoms = (.5 moles)(6 x 10 23 atoms/mole) = 3 x 10 23 atoms. # O atoms = (2 moles)(6 x 10 23 atoms/mole) = 12 x 10 23 = 1.2 x 10 24 atoms. 7. Find the grams of each atom present in the sample of Ca3(PO4)2 from question 6.