What is the ratio of Al raised to the 3 plus power ions to cap s raised to the 2 minus power ions in a neutral compound?

Each aluminum ion has a 3+ charge, and each sulfide ion has a 2− charge. Two aluminum ions contribute +6, while three sulfide ions contribute −6, balancing the charges to make a neutral compound. So the ratio of Al³⁺ ions to S²⁻ ions is 2 to 3, the choice “ratio of 2 to 3.”

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