Verified answer

Ответ:

Mr(Li2CO3) = 7*2+12+16*3 = 74

Mr(KNO3) = 39+14+16*3 = 101

Mr(H3PO4) = 1*3+31+16*4 = 98

Mr(Na3PO4) = 23*3+31+16*4 = 164

Mr(Al2(SO4)3) = 27*2+32*3+16*12 = 342

Mr(CaO) = 40+16 = 56

Mr(K2CO3) = 39*2+12+16*3 = 138

Mr(Fe2(SiO3)3) = 56*2+28*3+16*9 = 340

Mr(Cr(OH)3) = 52+16*3+1*3 = 103

Mr(HClO4) = 1+35.5+16*4 = 100.5

Объяснение:

Mr - молекулярная масса