Bonjour,
Masse volumique = Masse/Volume
m = 2,14.10⁻² g et V = 120 mL = 120.10⁻³ L
Donc : ρ(Hélium) = 2,14.10⁻²/120.10⁻³ ≈ 1,78.10⁻¹ g/L
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Bonjour,
Masse volumique = Masse/Volume
m = 2,14.10⁻² g et V = 120 mL = 120.10⁻³ L
Donc : ρ(Hélium) = 2,14.10⁻²/120.10⁻³ ≈ 1,78.10⁻¹ g/L