what is the average mass in kilogram of one atom of arsenic?

Question

anonymous · Answer

Hey kryten is great

anonymous · Answer

i was making coffe but im back...
ok so lets start:
1 atom of As
M(As)=74,92 gmol-1
n=N/L= 1/6,022*10^23 mol-1 = 1,66 * 10^-24 mol
n=m/M --> m= n*M
m(1 atom of As)= 1,66*10^-24 mol * 74,92 gmol-1 = 1,244 *10^-22 g
= 1,244*10^-25 kg

anonymous · Answer

what time is it over there hey do you have a skype cause I be confused as to when to use Avagodro's N/a

anonymous · Answer

here is 5:09 am and i have skype but i cant talk cause my wife is sleeping :D
but ask away what are you unclear about avogadros nr, but open new question...

anonymous · Answer

i have an open question up