Réponses

2014-08-24T17:08:36+02:00
Bonjour

V = 80 dm^3 = 80 000 ou 8.10^4 cm^3
rhô = 7800 kg/m^3 = 7,8g/cm^3
m = 7,8 x 8.10^4 = 6,24.10^5 g