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Question

Calculate the molecular mass of chloroform CHCl3 atomic masses C=12u, H=1u and Cl=35.5u


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Solution

  1. Molecular mass is the sum of the masses of all the individual atoms present in a molecule or compound.
  2. The chemical formula of chloroform is CHCl3.
  3. The atomic mass of carbon is 12 u.
  4. The atomic mass of hydrogen is 1 u.
  5. The atomic mass of chlorine is 35.5 u.

MolecularmassofchloroformCHCl3=(AtomicmassofCarbon)x1+(Atomicmassofhydrogen)x1+(AtomicmassofChlorine)x3

=(12x1)+(1x1)+(35.5x3)

.=119.5g/mole

The molecular mass of chloroform is 119.5 g/mole.


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