Mr[K2SO4] = Ar[K] * 2 + Ar[S] + Ar[O] * 4 = 39.0983 * 2 + 32.065 + 15.9994 * 4 = 174.2592
Mr[LiOH] = Ar[Li] + Ar[O] + Ar[H] = 6.941 + 15.9994 + 1.00794 = 23.94834
Mr[CuNO3] = Ar[Cu] + Ar[N] + Ar[O] * 3 = 63.546 + 14.0067 + 15.9994 * 3 = 125.5509
Mr[CaBr2] = Ar[Ca] + Ar[Br] * 2 = 40.078 + 79.904 * 2 = 199.886
Mr[MgCO3] = Ar[Mg] + Ar[C] + Ar[O] * 3 = 24.305 + 12.0107 + 15.9994 * 3 = 84.3139
Mr[CaSO3] = Ar[Ca] + Ar[S] + Ar[O] * 3 = 40.078 + 32.065 + 15.9994 * 3 = 120.1412
Mr[CaCl2] = Ar[Ca] + Ar[Cl] * 2 = 40.078 + 35.453 * 2 = 110.984
Mr[BaSO4] = Ar[Ba] + Ar[S] + Ar[O] * 4 = 137.327 + 32.065 + 15.9994 * 4 = 233.3896
Mr[H3PO4] = Ar[H] * 3 + Ar[P] + Ar[O] * 4 = 1.00794 * 3 + 30.973762 + 15.9994 * 4 = 97.995182
Объяснение:
2) m (ч.)(H2SO4) = 120г - (120г * 0.25) = 120г - 60г = 60г;
3) М (Н2SO4) = 2 + 64 + 32 = 98 г/моль;
4) n(H2SO4) = m/M = 60 г / 98 г/моль ≈ 0,6 Моль;
5) n(CO2) = n(H2SO4) = 0,6 Моль (по уравнению);
6) V (CO2) = n*Vm = 0.6 Моль * 22,4 л/моль = 13.44 л;
ответ: V (CO2) = 13.44 л