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1 mol to 6,022 *10(23) cząsteczk
0,2 mola to x
X= 0,2 *6,022*10(23) /1 = 1,2044 * 10(23)
5 atomów w 1 cząsteczce więc: 5 * 1,2044*10(23) = 6,022 * 10(23) atomów