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Rank the following compounds in order of decreasing acid strength using periodic trends.Rank the acids from strongest to weakest. To rank items as equivalent, overlap them.BH3 HBr H2Se H2S

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razorrblazerr2004

HBr>H2S>H2Se>BH3 so basically

1. HBr

2. H2S

3. H2Se

4. BH3

H₂Se is more acidic than H₂S, and HBr is more acidic than BH₃. In a group, from top to bottom, the acidic strength increases. H₂Se is present down in the group than H₂S.  

HBr is more acidic than H₂S, and HBr is more acidic than BH₃. In a period from left to right, there is an increase in the acidic strength. Between HBr and H₂S, HBr is present at the extreme right in the period.  

Hence, the decreasing order of acidic strength is as follows:  

HBr > H₂Se > H₂S > BH₃

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