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mass of 1 H=1
mass of 2 H=2
mass of C=12
mass of O=16
mass of 3O=3×16=48
molecular mass of H2CO3=2+12+48
=62
mass of 2 H=2
mass of C=12
mass of O=16
mass of 3O=3×16=48
molecular mass of H2CO3=2+12+48
=62
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