M(H2SO4)=19.6г M(H2SO4)=98г/моль n(H2SO4)= m/M=19.6/98=0.2моль
N=Nₐ *n N=6.02*10²³ *0.2=1.204 *10²³молекул
1/ M C12H22O11 = 342г/моль v = 5/342 = 0.01462 моль n = 6.02*10^23 * 0.01462 = 88.012*10^20 молекул
2/ М Н2О = 18 г/моль v = 15/18 = 0.833моль n H2O = 6.02*10^23 *0.833 = 5.015*10*23 молекул ,
n H = 2*5.015*10^23 = 10.03 *10^23 атомов
1. D(j)(O2)= 2.75 ==> M(j)= 2.75 * 32 = 88 г/моль
CnH2n+1OH = 88
14n + 18 = 88
14n = 70
n = 5
C5H13OH — пентан-1-ол.
2. D(j)(N2)= 2.61 ==> M(j)= 2.61 * 28 = 73 г/моль
NH2 + R = 73
16 + R = 73
R = 57
n(C) = 57/12 = 4 ( ост. 9 ) ==> R = C4H9
C4H9NH2 — бутанамин.
3. M(C5H10O4)= 134 г/моль
W(C) = 60/134 = 44.78%
W(H) = 10/134 = 7.47%
W(O) = 100% - 44.78% - 7.47% = 47.75%