Oblicz, ile(proszę też, by podawać obliczenia):
- atomów helu znajduje sie w próbce o masie 4g;
x at He --- 4g
6.03 * 10 do 23 ---2g
x=4g* 6.03*10 do 23/ 4 g=12.06* 10 do 23 at He
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x at He --- 4g
6.03 * 10 do 23 ---2g
x=4g* 6.03*10 do 23/ 4 g=12.06* 10 do 23 at He