Find density (g/mL) of 3.60 M H₂SO₄ that is 29% by mass. (Mᵣ = 98 g/mol)

Formula linking molarity, density, and mass percent:

M = (10 × d × w%) / Molar mass

Substituting values:

3.60 = (10 × d × 29) / 98

d = (3.60 × 98) / (10 × 29) = 352.8 / 290 = 1.216 g/mL

Answer: Density = 1.216 g/mL

Note: Memorise M = (10×d×w%)/Mᵣ. Always keep w% as a plain number (29, not 0.29) and density in g/mL.