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Molarity | 23 mins | 0 completed | Learn Summary |
Normality & Equivalent Weight | 24 mins | 0 completed | Learn Summary |
Solution Stoichiometry | 22 mins | 0 completed | Learn |
Solubility Rules | 7 mins | 0 completed | Learn Summary |
Net Ionic Equations | 21 mins | 0 completed | Learn Summary |
Electrolytes | 19 mins | 0 completed | Learn Summary |
Redox Reaction | 32 mins | 0 completed | Learn Summary |
Balancing Redox Reactions | 22 mins | 0 completed | Learn |
Activity Series | 19 mins | 0 completed | Learn |
End of Chapter 4 Problems | 46 mins | 0 completed | Learn |
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Dilution |
Redox Reactions |
Calculate Oxidation Number |
Types of Chemical Reactions |
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Net Ionic Equation |
Oxidation Reduction (Redox) Reactions |
Oxidation Number |
When magnesium metal is burned in air, two products are produced. One is magnesium oxide, MgO. The other is the product of the reaction of Mg with molecular nitrogen, magnesium nitride. When water is added to magnesium nitride, it reacts to form magnesium oxide and ammonia gas.
In an experiment a piece of magnesium ribbon is burned in air in a crucible. The mass of the mixture of MgO and magnesium nitride after burning is 0.470 g. Water is added to the crucible, further reaction occurs, and the crucible is heated to dryness until the final product is 0.486 g of MgO. What was the mass percentage of magnesium nitride in the mixture obtained after the initial burning?
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