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Chemistry 100 Exam 2 Extra Credit1. In the following reaction:Fe2O3+ 3C → 2Fe + 3CO; how many grams of C areneeded to react with 16.5 g Fe2O3?2. Give an example of a physical change and chemical change.3.A sample of nitrogen (N2) has a volume of 50.0 L at a pressure of 760 mmHg.What is the volume of the gas when the pressure changes to 1500 mmHg if there is