Answer:
32.7%
Explanation:
To calculate the percentage by mass of an element in a compound, the following procedure is employed:
- Find the atomic mass of the element
- Find the molar mass of the compound
- Divide the atomic mass of the element by the molar mass of the compound and multiply by 100
Mathematically; this is denoted by:
Mass % of Sulphur = (Atomic mass of S/Molar mass of H2SO4) × 100
Atomic mass of S = 32g/lol
Molar mass of H2SO4 = 1(2) + 32 + 16(4) = 2 + 32 + 64
= 98g/mol
Hence,
% mass of S = 32/98 × 100
= 0.3265 × 100
= 32.65
= 32.7 (1 d.p)
Therefore, the percent of sulfur in sulfuric acid (H2SO4) is 32.7%
