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Verified Answer :

Edufirst

Neutral => positive charge = negative charge

Sr 2+ --> 2 positive charge

Br - --> 1 negative charge => you need two Br

2 Br - --> 2 negative charge

Then, the ratio is 1 Sr2+ ion to 2 Br - ions = 1Sr2+ / 2Br- = 1/2

Answer: The ratio of \(Sr^{2+}\) to \(Br^{-1}\) is 1:2.

Explanation: A neutral compound is one which does not bear any charge. Thus to make a compound neutral, the amount of positive charge must be equal to the amount of negative charge.

Thus to balance \(Sr^{2+}\), two molecules of \(Br^{-1}\)  are required. They combine to form strontium bromide (\(SrBr_2\)).

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