The 1995 Nobel Prize in Chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning the formation and decomposition of ozone in the stratosphere. Rowland and Molina hypothesized that chlorofluorocarbons (CFCS) in the stratosphere break down upon exposure to UV radiation, producing chlorine atoms. Chlorine was previously identified as a catalyst in the breakdown of ozone into oxygen gas. Using the enthalpy of reaction for two reactions with ozone, determine the enthalpy of reaction for the reaction of chlorine with ozone. (1) CIO(g) + O,(g) → Cl(g) + 20,(g) AHan = -122.8 kJ (2) 20,(g) → 30,(g) (3) 0,(g) + Cl(g) AHan = -285.3 kJ CIO(g) + 0,(g) ? %3D kJ

Use the sample experimental data to calculate the mass of water lost    Mass of pan 15.110 g   Mass of pan+ sample before heating 17.452 g Mass of pan + sample after heating 17.107 g Use the sample experimental data to calculate the % of water in sample   Mass of pan 15.110 g Mass of pan + sample before heating 17.452 g Mass of pan+ sample after heating 17.107 g

Blank 1 is a cheap material used to create buildings, bridges, and other massive constructions. Blank 1 Add your answer

Please I need help solving number 12

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic. LOH X CF3 COOH I H II A) III >> V > II > IV B) V > III > | > |I > IV C) I>II> III > IV> V D) V >II> IV > III > I E) III > V > II > I > IV H III H₂C 220 H₂C IV CH3

How to answer number 67

21. Water goes through a chemical change when it evaporates into a gas.   Group of answer choices a)  True b)  False

Question 36

Need all three plz

is urine homogeneous or heterogeneous mixture?