Determine the number of electrons in a Sion with a charge of + 3

If you're talking about a Sulfur ion, there are 13 electrons.

Explanation:

Sulfur originally had 16 electrons in its atom.

A charge of +3 means that sulfur must have lost 3 electrons, and therefore needs to gain back 3 electrons to achieve its atomic configuration.

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a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.