Answer:
The answer to your question is:
Explanation:
Formulas given Status Correct formulas
NaO₂ Incorrect Na₂O
RbCl Correct
K₂S Correct
Al₂Cl₃ Incorrect AlCl₃
MgP₂ Incorrect Mg₃P₂
Any mechanical device which is used to help people is a (machine)
the answer is machine
If’s chemistry it would be like this- Xe=1 and F=2/Xe=1 and F=6 so, to balance Xe=1 and F=[3x2]/Xe=1 and F=6.