I only need the finel answers plz 48. Which of the following reactions that occu

Question

I only need the finel answers plz

48. Which of the following reactions that occur in the lab Preparation of an Iron Oxalate Complex is an oxidation/reduction reaction? 49. When sulfuric acid reacts with various substances, a gas is produced. Which of the following, when it reacts with sulfuric acid, results in a gas that is colorless and is not H2(g)? A. Na2C2O4(s) with dilute sulfuric acid B. NaHCO3(s) with dilute or 18M sulfuric acid C. Zn(s)with dilute or 18M sulfuric acid D. Mg(s) with dilute or 18M sulfuric acid E. NaI with 18M sulfuric acid 50. In the lab The Density of Air, the flask is filled with carbon dioxide from the sublimation of dry ice. What physical property of carbon dioxide allows the flask to filled with displace the air? A. It is colder than air. B. It is more dense than air. C. It is warmer than air D. It is drier than air. E. It is less polar than air.

Explanation / Answer

48] A

49]A

50]B

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