La arena esta constituida de dioxido de slicio(SiO2)¿Cuantos moles hay en 250g de arena?
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PM SiO₂
Si ⇒28 g/mol × 1 = 28
O ⇒16 g/mol × 2 = 32 +
PM = 60 g/mol
mol = 250 g ⇒ 4,17 mol
60 g/mol