Molar mass Na = 23 g/mol
23 g ------------- 6.02 x 10²³ atoms
4.56 x 10⁻² g ----- ? atoms
atoms = 4.56 x 10⁻² x ( 6.02 x 10²³ ) / 23
atoms = 2.74 x 10²² / 23
= 1.19 x 10²¹ atoms
hope this helps!
How strong the tides are and the type of material the water is hitting.
The answer is A ( pure water has no free ions)
Given: Age of sample = 555
Half life = 111
So, number of half life =
=
= 5
Thus, number of half life of radioactive sample is 5
The answer is NO
N has 5 valence electrons
O has 6
Therefore combined there is 11 electrons so they will never complete the octet