Question

calculate the formula unit mass of caco3

Answer 1

The formula unit mass is the sum of the individual atomic weights of the elements that make up the compound.

atomic weight of Ca = 40 
"          "           of C = 12
  "        "            of O = 16

formula unit mass of CaCO3 =  40 + 12 + (16×3)
                                               = 40 +12 +48 
                                               = 100

Therefore the formula unit mass of CaCO3 = 100 a.m.u (atomic mass unit)

Answer 2

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