Question

Помогите решить Сa (OH)2 H3PO4 K2CO3 Ca3(PO4)

Answer 1

= 40+2×(16+1)=40+34=79
=3×1+31+4×16=3+31+64=98
=2×39+12+3×16=138
=3×40+(31+16×4)×2=120+95×2=310