Răspunsuri

2014-02-21T15:13:14+02:00
Vcub=3³=27m³
=> Mfierului= 7800kgx27=210600kg( mare numarul...)
Un mol de fier cantareste 112g
210600kg=2106x10²⁺³=2106x10⁵g
1 mol......112g
x mol......2106x10⁵g
1/x=112/2106x10⁵
x=2106x10⁵/112=18,....x10⁵