Given:
Number of moles = 7
Atomic mass of H2SO4 = 2 ×1 + 32 + 4 × 16 = 98g/mol
To find out the mass of sulphuric acid, apply the formula given:
Number of moles = \(\frac{Mass}{Molar\,mass}\)
⇒ 7 =\(\frac{mass}{98\,g/mol}\)
⇒ Mass = 7 mol × 98g/mol
⇒ Mass = 686g
Thus, the mass of sulphuric acid is 686g.
