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Question

What is the molecular weight of sulfuric acid?


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Solution

Step 1. Molecular weight

  • Molecular weight is the sum of atomic weight, measured in amu.
  • The mass of one carbon atom is equal to the atomic mass unit (formerly abbreviated as 'amu,' but now spelled as 'u' – unified mass) according to the latest IUPAC recommendation.

Step 2. The formula for the molecular weight of Sulfuric acid

The molecular weight of Sulphuric acidH2SO4=(2×theatomicmassofH)+(1×theatomicmassofS)+(4×theatomicmassofO)

Step 3. Calculation of molecular weight of Sulfuric acid

The molecular weight of Sulphuric acidH2SO4 =2(1.008)+32.06+4(16)u

= 98.076u

=98.08u

Hence, the molecular weight of sulfuric acid is 98.08u.


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