Дано :
m(H3PO4) = 162 г.
Найти :
N(H3PO4) = ?
ŋ = m/M ; ŋ = N/(6,02*10²³ 1/моль)
m/M = N/(6,02*10²³ 1/моль)
M(H3PO4) = 3*Ar(H) + Ar(P) + 4*Ar(O) = 3*1 + 31 + 4*16 = 3 + 31 + 64 = 98 г/моль.
N(H3PO4) = m(H3PO4)*6,02*10²³ / M(H3PO4) = 162 [г]*6,02*10²³ [1/моль] / 98 [г/моль] ≈ 9,95*10²³.
≈ 9,95*10²³.
