CHEM 120 Introduction To General, Organic, And Biological Chemistry With Lab (CHEM 120)

CHEM 120 Week 4 Midterm Exam (Fall 2020) Question: Joe conducts an experiment to test the effectiveness of a new drug for cancer. Which of the following variables would be easiest to control? Question: A mixture containing 50 grams of carbon and 75 grams of oxygen is sealed in a flask. The total mass of the system is 225 grams. The flask is heated to cause the carbon and oxygen to react. The sealed flask is What is the mass of the sealed flask? Question: Aluminum has a density of 2.7 g/cm3....

Question: A reaction that releases energy as it is classified as an ____ while a reaction that absorbs energy as it occurs is classified as an ____. Question:Which coefficient is placed in front of potassium to balance the following equation? K+H2SO4-K2SO4+H2= ____ Question: Which coefficient is placed in front of HCI to balance the following equation? Ca(OH)2 +? HCICaCl2 +H2O = ____ Question: Sodium reacts with oxygen to form sodium oxide and has the following chemical equation: 4 Na +...