Question

Ce masa de Carbon care contine 80 la suta carbon formeaza prin ardere completa 10 moli de dioxid de carbon

Answer 1

Răspuns:

M,C= 12g/mol

-calculez masa de C pur din care se obtin 10 moli CO2

1mol........................1mol

C    +    O2-------> CO2

x.................................10mol

x=niux10mol

m=niuxM= 10molx12g/mol=120gC  PUR

-Calculez masa de C impur,care contine 120gC pur

p= mpx100/mi---> mi=120x100/80g=.........................calculeaza !!!!!

Explicație: