Question

13.Raza atomului de magneziu stiind ca pe o lungime de 3 cm se pot aseza unul langa altul 2×108 atomi de magneziu

va rog dau test la chimie

Answer 1

Răspuns:

a) 1 mol Mg....................,6,023*10^23 atomi

2 moli Mg.......................x=2*6,023*10^23 atomi

b) 0,5 kmoli Ag=500 moli Ag

1 mol Ag..................6,023*10^23 atomi

500 moli Ag.................x atomi

x=6,023*500*10^23 atomi

c) MC=12g/mol

n=m/M=120/12=10 moli C

1 mol C................6,023*10^23 atomi

10 moli C..............x=6,023*10^24 atomi

d) n=m/M=120/12=10 kmoli C = 10000 moli C

1 mol C.................6,023*10^23 atomi

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

Explicație: