Réponses

2014-03-01T20:56:15+01:00
Formule du propan-2-ol :  C_{3}H_{8}O

1) n = m / M  avec M = 3M(C) + M(O) + 7M(H) 
                            M = 3*12 + 16 + 7 = 59 g / mol

   donc m = n * M = 0.183 * 59 = 10.8 g 

2) ρ = m / V = 0.785 g / mL donc V = m / ρ = 10.8 / 0.785 = 13.75 mL

3) Cn = n / V = 0.183 / 0.02 = 9.15 mol / L 
    Cm = m / V = 10.8 / 0.02 = 540 g / L