Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) The structural formula of monomer of polymethymethacrylate (PMMA) is - Sarthaks eConnect

The structural formula of monomer of polymethymethacrylate (PMMA) is

`CH_2 = CHCOOCH_3`

`CH_2=overset{overset{CH_3}{|}}{C}-COOCH_3`

`CH_3COOCH = CH_2`

`CH_3COOunderset{underset{CH_3}{|}}{C}=CH_2`

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Formula `2^(nd)` is of methyl methacrylate, the monomer of PMMA or Plexiglass.