Page 208 - Chemistry eBook
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The Number of Atoms in a Molecule
To find the number of atoms in a molecule:
1. Multiply the coefficient by the subscript of each atom. (If there is
no subscript, multiply by 1.)
2Ca(SO4) Ca: 2
S: 2
O: 8 (2 x 4)
2. Add all the values together. 2Ca(SO4)
2+2+8=12 atoms in the molecule
207 © UNIT 6: MATH IN CHEMISTRY
