The independent variable in the Magnesium Oxide Lab would be the Mass of the Magnesium Ribbon. This is because the mass of the product, i.e. Magnesium Oxide, depends on how much Magnesium is added.
A reaction is not an investigation unless you set it up with a question to answer. I'll assume you mean burning magnesium to get magnesium oxide, and not the reaction of magnesium oxide with acid. For instance, you might ask 'What is the effect on the rate of burning if you have magnesium with different surface areas?' In that case the independent variable is the surface area. Another question is 'How does the partial pressure of oxygen affect the time for burning?' and the partial pressure is the independent variable. This is not a good reaction to pick for an investigation, as it is so violent and very difficult to measure whatever dependent variable you pick. Magnesium oxide and acid would be great. You could look at the effect on rate of such variables as the concentration of the acid and its temperature.
This is the amount of available oxygen, if you think to magnesium burning.
Zinc oxide reacts with metallic magnesium to produce magnesium oxide and metallic zinc.
Magnesium plus oxygen becomes magnesium oxide.
Magnesium Oxide is a compound, not a reaction. However if you are talking about making magnesium oxide from its individual elements, that would be a redox reaction. In this reaction, magnesium is going from a zero oxidation state to a +2 oxidation state. If you think of the acronym OIL RIG (Oxidation Is Lost Reduction Is Gained) Magnesium is being oxidized as it has lost two electrons. As well, the oxygen is gaining two electrons to have a -2 charge and is therefore being reduced hence the term redox.
combination
The product is magnesium oxide (MgO) when magnesium reacts with oxygen.2Mg(s) + O2(g) --> 2MgO(s)magnesium + oxygen --> magnesium oxide
Zinc oxide reacts with metallic magnesium to produce magnesium oxide and metallic zinc.
magnesium oxide + nitrogen >>> magnesium nitrite
Magnesium plus oxygen becomes magnesium oxide.
A compound / element created by a chemical reaction. Example: Magnesium + Oxygen -> Magnesium Oxide The Magnesium Oxide would be the Product.
The reaction between magnesium oxide and carbon at 2000C to form magnesium metal and carbon monoxide is an example of the reduction of magnesium oxide to magnesium metal.
an exothermic combination reaction
Magnesium Oxide is a compound, not a reaction. However if you are talking about making magnesium oxide from its individual elements, that would be a redox reaction. In this reaction, magnesium is going from a zero oxidation state to a +2 oxidation state. If you think of the acronym OIL RIG (Oxidation Is Lost Reduction Is Gained) Magnesium is being oxidized as it has lost two electrons. As well, the oxygen is gaining two electrons to have a -2 charge and is therefore being reduced hence the term redox.
Magnesium reacts violently with oxygen to make Magnesium Oxide
The product is magnesium oxide (MgO) when magnesium reacts with oxygen.2Mg(s) + O2(g) --> 2MgO(s)magnesium + oxygen --> magnesium oxide
It produces Ammonia and Magnesium Deuteroxide
combination
Magnesium + oxygen --> magnesium oxide 2Mg (s) + O2 (g) --> 2MgO (s)