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Hey so some of the problems from the homework for the Chemical Bonds section asks us to give the chemical formula when we are given the name of a compound. The problems I am referring to are from chapter 3 #25 and 27 (from the 6th edition). I was able to figure out the chemical formula for most of the compounds but had trouble with: indium (III) sulfide and thallium (III) chloride. What does the roman numbers indicate? Can someone give me through the process of figuring out the chemical formula for these please? Thank you!
The Roman numerals indicate the charge. For example, this means that Indium has a 3+ charge. We know that sulfur has a 2- charge, so the compound would be made of 2 Indium and 3 Sulfur to cancel out to charges. This results in the chemical formula: In2S3.
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