Question

Compozitia procentuala de masaa Ca(NO3)2
Masa ce contine 10 grame de calciu

Answer 1

Răspuns:

Explicație:

MCa (NO3)2  = 40 + 2.14 + 6.16=164-------> 164g/moli

164gsare-----------40gCa--------28gN-------96g  O

100g----------------------x---------------y-------------x

x= 100 .40 : 164=24,39% Ca

y= 100. 28 :164=17,07%N

z= 100.96 : 164=58,54% O

164g Ca(NO3)2---------40g Ca

w------------------------------10gCa

w= 164 . 10 : 40=41 g Ca(NO3)2