This is the info

answer 2 and 4 down here

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2. The charge (or oxidation number) usually assigned to chlorine in compounds is 1. Based on your empirical formula, what must be the oxidation number of Mg in magnesium chloride? 4. How would the empirical formula be affected if you had made the following errors: a. You did not add enough HCl for the reaction to go to completion b. You added a large excess of HCl, more than was needed for the reaction to go to completion c. Some of your product spattered out of the crucible while you were drying it d. The sample was not completely dry when you weighed it