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   Calculations:Formula Masses, Moles, and Chemical Equations | 
 
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   Fig. 6.1	Oranges may be bought in units of mass or units of amount. | 
 
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   Fig. 6.2	A basic process in chemical laboratory work is determining the mass of
       a substance. | 
 
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   Fig. 6.3	Everyday counting units. | 
 
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   Fig. 6.4	Amadeo Avogadro was the first scientist to distinguish between atoms
       and molecules. | 
 
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   Fig. 6.5	The mass of a mole depends on the substance. | 
 
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   Fig. 6.6	A computer-generated model of the molecular compound N2O4. | 
 
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   Fig. 6.7	In solving chemical-formula-based problems, the only “transitions”
       allowed are those between quantities (boxes) connected by arrows. | 
 
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   Fig. 6.8	When 16.90g of the compound CaS is decomposed into its constituent
       elements, the Ca and S produced has an identical mass of 16.90g. | 
 
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   Fig. 6.9 In solving chemical-equation-based problems, the only
       “transitions” allowed are those between quantities (boxes) connected by
       arrows. | 
 
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   Fig. 6.10	Testing apparatus for measuring the effects of air bag deployment. |