Answer:
Use the x method, cross over each charge.
Explanation:
and
the +1 and -1 cancel each other out, so it will be KBr
1) Calculate the molar weight. 12.000 + 4*(35.45)
2) Divide 15.0 by the molar weight to get moles
3) Multiply by Avogado's number of get the number of molecules.
<span>Na+ has 10 electrons, so find the atom with 10 electrons.
</span><span> Neon has 10 electrons</span>