Question

Calculate the number of iron atoms is a iron weighing 28kg

Answer 1

Answer:

sorry I don't know the answer

Answer 2

Explanation:

Solution: Number of Atoms

We can calculate the number of atoms N in the iron weight using two different methods. We can use calculated amount of substance n and Avogadro constant NA:

N=nNA=mNAMm,

N=1kg⋅6.022⋅1023mol−155.845⋅10−3kgmol−1,

N=˙1.08⋅1025

or we use knowledge of the mass of one particle (from the relative atomic mass):

N=mm0=mArmu,

N=1kg55.845⋅1.66⋅10−27kg,

N=˙1.08⋅1025.