Question

In cate grame de magneziu se gaseste acelasi numar de atomi ca cel existent in 48g de oxigen?

Answer 1

n=m supra M
n=48 supra 32
n=1,5 moli O2
n=nr.atomi supra NA
nr.atomi =n×NA
nr.atomi =9,0345×10la 23 atomi O2
n=9,0345×10la23 supra 6,023×10la23
n=1,5 moli Mg
m=n×M
m=1,5×24
m=36 g Mg