Chemistry

Is there any difference between oxalic acid and oxalic acid dihydrate? Is there difference in their molar mass? Is the molar mass of any substance always g/mol no matter the substance?

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asked by Nsp
  1. Oxalic acid is H2C2O4.
    Oxalic acid dihydrate is H2C2O4.2H2O
    Of course there is a difference in molar mass. The dihydrate has an additional 36 g/mol because of the two H2O moleculeds.
    Molar mass can be any unit you want it to be but if you use the numbers in the periodic table you get g/mol.

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