Question

bucata de sapun cantareste 80g si contine 10% sulf. Sa se calculeze numarul neutronilor continuti in nucleele atomilor de sulf

Answer 1

10% din 80= 10/100*80=8g S
1 mol S.........32 g S..........6,023*10^23 atomi
                    8 g S................x atomi 
x=(6,023*8*10^23)/32=1,5*10^23 atomi
1 atom................16 n
1,5*10^23 atomi.............y n
y=16*1,5*10^23=24*10^23 neutroni