The radius of a barium atom is 2.22e-10 m what is its radius in angstroms

Solution:

Angstroms is defined as a unit of length equal to one hundred-millionth of a centimeter, 10–10 meter, used mainly to express wavelengths and inter atomic distances.

Therefore,

1 angstroms=10 -10 m  

2.22*10^ -10 m=2.22*10 -10 /10 -10  

=2.22 angstroms  

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.