Ca is calcium, one atom.
9
The formula is Ca(ClO3)2, so the total number of atoms in the compound is 9.
In Ca(ClO3)2 there are one calcium atom, two chlorine atom and six oxygen atom. So total of nine atoms
9 atoms
This compound is calcium nitrate. Each formula unit will contain 9 atoms.
Assuming that the compound is the one that should have been written as Ca(ClO3)2, the answer can be determined by counting in a properly interpreted formula: one Ca, two Cl, and six O for a total of nine.
a compound
12.7 moles calcium (6.022 X 10^23/1 mole Ca) 7.65 X 10^24 atoms of calcium in 12.7 moles.
Nope... it is not.
The number of a chemical compound is given after the rules of American Chemical Society (CA number).
The number of atoms is 33.
1