atomic mass number question


by mawalker
Tags: atomic, mass, number
mawalker
mawalker is offline
#1
Nov8-06, 03:25 PM
P: 53
sorry, i'm having trouble grasping a lot of this... i feel like i have a general understanding of what's going on but a lot of the problems are still confusing to me...

this problem

An element in its solid phase has mass density 1750 kg/m3 and number density 4.39 * 10^28 atoms/m3.

asks what is the element's atomic mass number

i thought that it should just be 4.39*10^28 divided by 1.661 *10^-27 = u, but then i'm not sure where the mass in kg comes in to play
Phys.Org News Partner Science news on Phys.org
Going nuts? Turkey looks to pistachios to heat new eco-city
Space-tested fluid flow concept advances infectious disease diagnoses
SpaceX launches supplies to space station (Update)
Max Eilerson
Max Eilerson is offline
#2
Nov8-06, 03:32 PM
P: 122
1 au = 1.661 *10^-27 Kg.
mawalker
mawalker is offline
#3
Nov8-06, 03:35 PM
P: 53
yeah, i know the atomic unit number but how does it relate to mass density?

mawalker
mawalker is offline
#4
Nov8-06, 10:31 PM
P: 53

atomic mass number question


can anyone point me in the right direction? i'm still not getting this
quasar987
quasar987 is offline
#5
Nov8-06, 10:44 PM
Sci Advisor
HW Helper
PF Gold
quasar987's Avatar
P: 4,768
[tex]\rho=nm[/tex]

where rho is the mass density, n is the number density and m is the mass of the atoms.


Register to reply

Related Discussions
Atomic Number Introductory Physics Homework 3
Atomic mass number question. Biology, Chemistry & Other Homework 6
Atomic number and Chemistry 6
atomic mass vs. atomic number Introductory Physics Homework 9
Atomic mass: Isotope question Chemistry 3