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SiO2 to 1 cząsteczka
Si- to atom, O2 to cząsteczka zbudowana z 2 atomów
2 +1=3
więc SiO2 = 3 atomy = 1 cząsteczka
3 * 5 * 10 do 13 potęgi = 15 * 10 do 13 potęgi = 1,5 * 10 do 14 potegi ( 14 zer)
odp. 1.5 * 10 (14 zer)
5000000000000 * 3 = 150000000000000 (15 + 13 zer)