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17 ¼ -12 ⅜=16 i 5/4 -12 ⅜=16 i 10/8 -12 ⅜=4 i 7/8
Wiedząc że atom wodoru ma masę 1,674x10(-10)g<---do potęgi.Oblicz masę 2000atomów wodoru .
1,674x10⁻¹⁰g*2000=1,674x10⁻¹⁰g*2*10³=3,348 *10⁻⁷ g