n(H2O) = m(H2O) : M(H2O) = 25 : 18 = 1,389 моль
N(H2O) = n(H2O) × Na = 1,389 × 6,02×10²³ = 8,36×10²³ молекул
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n(H2O) = m(H2O) : M(H2O) = 25 : 18 = 1,389 моль
N(H2O) = n(H2O) × Na = 1,389 × 6,02×10²³ = 8,36×10²³ молекул