Hydrogen Sulfide
* Formula: H₂S
* Explanation: Hydrogen sulfide is a binary compound, meaning it consists of two elements: hydrogen (H) and sulfur (S). Sulfur forms a -2 charge, and hydrogen forms a +1 charge. To balance the charges, we need two hydrogen atoms for every one sulfur atom, hence the formula H₂S.
Lead Nitrate
* Formula: Pb(NO₃)₂
* Explanation: Lead nitrate is a compound consisting of lead (Pb), nitrogen (N), and oxygen (O).
* Lead has a +2 charge.
* The nitrate ion (NO₃⁻) has a -1 charge.
* To balance the charges, we need two nitrate ions for every one lead atom, resulting in the formula Pb(NO₃)₂.
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