The answer is c Yep Allll day
Neon has filled its outer shells, therefore it is very stable and does not need to react with other elements and doesn’t form compounds.
According to Dalton's Atomic Theory, the <em>Law of Definite Proportion is applied when a compound is always made up by a fixed fraction of its individual elements.</em> This is manifested by the balancing of the reaction.
The reaction for this problem is:
H₂ + Cl₂ → 2 HCl
1 mol of H₂ is needed for every 1 mole of Cl₂. Assuming these are ideal gases, the moles is equal to the volume. So, if equal volumes of the reactants are available, they will produce twice the given volumes of HCl.
The formula for K+ and S-2 is K2S because you need 2 potassium ions to balance out the sulfide ion