In the MgO experiment, would oxide on the Mg strip cause the mole ratio of O to Mg to be too high or low?

Question

I thinbk that the Oxide on the strip may cause there to be too much Oxide at the final weigh in.

Answer 1

Oxide already on the strip would mean that it didn't gain enough mass when heated, meaning that that it would appear that there was too much magnesium.

The mole ratio of O:Mg would be too low.

Answer 2

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Answer 3

The chemical formula for magnesium oxide is MgO, no longer MgO2. Magnesium has an oxidation style of +2, jointly as oxygen has an oxidation style of -2. 2Mg(s) + O2(g) --> 2MgO(s) ========= persist with up ========= i assume we do would desire to show out that that's achieveable to have an unusual compound which does have the formula MgO2. that's stated as magnesium peroxide and that's quite volatile. in touch with water it decomposes to type MgO and H2O2, which in turn decomposes to water and oxygen gas. MgO2 is utilized in purposes the place oxygen is to be released slowly as MgO2 is presented in touch with moisture. yet you could't produce MgO2 by way of burning Mg in oxygen. It decomposes at temperatures properly below the temperature of burning magnesium.