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masele de potasiu ,sulf,oxigen care se afla in 87g sulfat de potasiu sunt:​

Răspuns :

Răspuns:

MK2SO4=2×39+32+4×16=174f/mol

174gK2SO4.........................78gK............32gS...............64gO

87gK2SO4...........................xgK..................ygS..................zgO

x=87×78/100=calculeaza

y=32×97/100=calculeaza

z=64×87/100=calculeaza

Explicație: