Ответ:
Mr ( K2CO3)= 39*2+ 12+ 16*3= 78+12+48= 90+48=138
Mr(NaOH)= 23+16+1= 40
Mr(CuCl2)= 63+35*2= 63+70=133
Mr(K2O)= 39*2+16=78+16=94
Mr (P2O5)= 31*2+16*5= 62+80=142
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Ответ:
Mr ( K2CO3)= 39*2+ 12+ 16*3= 78+12+48= 90+48=138
Mr(NaOH)= 23+16+1= 40
Mr(CuCl2)= 63+35*2= 63+70=133
Mr(K2O)= 39*2+16=78+16=94
Mr (P2O5)= 31*2+16*5= 62+80=142