PPT Slide

9

• The sulfur dioxide formula, SO 2, shows that its molecules  contain one S atom and two O atoms; calculate its molar mass.

• One mole SO 2 contains 6.02 x 10 23 SO 2 molecules, which  consist of 6.02 x 1023 S atoms and 2(6.02 x 10 23) O atoms.

• Same for ionic compounds, such as potassium sulfide (K 2 S):

Concept 4. The information in a chemical formula

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