Question

2.) what is the chemcial formula for potassium sulfide? (1 point)\\(\bigcirc\\) \\(\ce{k2s}\\)\\(\bigcirc\\) \\(\ce{k_{+2}s_{.1}}\\)\\(\bigcirc\\) \\(\ce{k2s1}\\)\\(\bigcirc\\) \\(\ce{ks2}\\)

Explanation:

To determine the chemical formula for potassium sulfide, we analyze the ions involved. Potassium (K) has a +1 charge (\(K^+\)) and sulfide (S) has a -2 charge (\(S^{2-}\)). To balance the charges, we need 2 potassium ions for every 1 sulfide ion. So the formula is \(K_2S\) (subscripts of 1 are typically omitted). The other options have incorrect formatting or subscripts (e.g., \(K_{+2}S_{.1}\) is invalid, \(K_2S_1\) unnecessarily includes a 1 for S, \(KS_2\) has the wrong ratio).

Answer:

A. \(K_2S\)