A solution of H2SO4(aq) with a molal concentration of 1.66 m has a density of 1.104 g/mL. What is the molar co?

1.66 means 1.66 mole of H2SO4 in 1 Kg of water
mass of 1.66 mole H2SO4 = 1.66mole x 98.078 g/mole = 162.81 g
mass of the solution = 1Kg 162.81g = 1162.81 g
Volume of solution = 1162.81g / 1.104g/mL = 1053.27 mL

the molar concentration of this solution = 1.66 mole / 1.05327L = 1.576 M

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Consider a solution which contains 1000 g (1 kg) of the water (the solvent).

No. of moles of H₂SO₄ = (1.66 mol/kg water) × (1 kg water) = 1.66 mol
Molar mass of H₂SO₄ = 1.008×2 + 32.06 + 16.00×4 = 98.08 g/mol
Mass of H₂SO₄ = (98.08 g/mol) × (1.66 mol) = 163 g

Total mass of the solution = (1000 + 163) g = 1163 g
Volume of the solution = (1163 g) / (1.104 g/mL) = 1053 mL = 1.053 L

Molar concentration = (1.66 mol) / (1.053 L) = 1.58 M