Рассчитать молекулярную массу вещества.

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