Question

Determina nr de atomi din :
a) 0,5 moli argint
b) 0,5 kmoli argint
c) 100 g carbon
d) 120 kg carbon

Answer 1

a) 1 mol Ag....................6,023*10^23 atomi
0,5 moli Ag.....................x=6,023*0,5*10^23 atomi Ag

b) 0,5 kmoli =500 moli Ag

1 mol Ag..................6,023*10^23 atomi
500 moli Ag..............x=6,023*500*10^23 atomi

c) 12g C........................6,023*10^23 atomi
100g C..........................x=6,023*100/12*10^23 atomi 

d) n=m/M=120/12=10 kmoli C

12kmoli =10000 moli C

1 mol C...................6,023*10^23 atomi
10000 moli C...........x=6,023*10^27 atomi