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Olenka [21]
3 years ago
8

How many oxygen atoms are in 68.8mg Na₂S₂O₃ 5H₂O

Chemistry
1 answer:
guajiro [1.7K]3 years ago
5 0
It should be 8 O atoms. 3O atoms in Na2S2O3 and 5O atom in 5H2O.  The reason there are 5 O atoms are because the 5 in front of H2O means you multiply each atom in the compound by that number (like the distributive property). The H2 molecule becomes 10 Hydrogen atoms (5*2) and the Oxygen becomes 5 Oxygen atoms (5*1). Then you add the 5O atoms to the 3O atoms which equals 8
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