Perform the following mathematical operations, and express the result to the correct number of significant figures. a. = b. = C. = d. = e. = f. =

3. Write a one-paragraph summary of the research you did about tests that can be used to identify the formation of gaseous reaction products. Be sure your paragraph discusses at least two tests that could have been used in the experiments you observed

4. Propane, C3H8, when used as a fuel, reacts with oxygen to produce carbon dioxide and water according to the following equation: C3H8 +0₂--> CO₂ + H₂O a. Balance the equation b. How many grams of oxygen (O₂) will be needed to produce 5.67 moles of CO₂ ?

5. Given the following reaction: C6H12O6 + 0₂--> CO₂ + H₂O a. Balance the equation b. Determine the number of grams of water produced when 1.68 g of C6H12O6 (glucose) is oxidized.

6. Urea (CH4N₂O) is a common fertilizer that is synthesized by the reaction of ammonia (NH3) with carbon dioxide (CO₂). 2 NH3 + CO₂--> CH4N₂O + H₂O In an industrial synthesis of urea, a chemist combines 1.364 X 10^5 g of NH3 with 2.114 X 10^5 g of CO₂. The reaction was performed and 1.684 X 10^5 g of urea was obtained. Determine the limiting reactant, theoretical yield, and percent yield for the production of urea.

1. (a) How is the percent copper determined in this experiment ? (b) What is the chemical reaction and the mole ratio between oxalate and permanganate in the titration reaction ? Chemical reaction: _______________________________________ Mole ratio: _______________________ C₂04² : _________________ MnO4 (c) How is the percent water determined in this experiment?

H+ equals OH- pH values of basic (alkaline solution) pH values of acidic solution Progressing from weak to strong acid Progressing from weak to strong base Result of adding H+ to a solution

9 slide to cover You will work in the group which will remain the same for the following laboratory work. For this particular assignment: You will need to research options for the preparation of hand sanitiser. You will need to appropriately reference sources you use, on the relevant slide. You will need to work as a group; to consider the ideas presented by other members of your group. • You will need to justify your decisions and consider the practicalities of the laboratory work to be undertaken in the undergraduate teaching laboratory. Within a team, all members will have different skills, including with respect to communication. Try and identify your and other group members skills, then consider them in how the group works. While bearing in mind that some individuals can be more vocal than others, try and ensure each member in your group is given opportunities to make suggestions.

5. Use the data table below to record info about the results of your investigation. Data should include info about the reactants, products, & signs of chemical changes. Be sure to note the form of the reactants and products. Use (s) for solid, (l) for liquid, (aq) for solution, and (g) for gas.

02 Question (4 points) 1st attempt Part 1 (2 points) I've discovered a new material! Its entropy of vaporization is 322.5 J/mol-K and its enthalpy of vaporization is 580 kJ/mol. Which of the following is TRUE? Choose one: O Vaporization always decreases entropy of a system. O Vaporization always increases entropy of a system. O Vaporization at high temperatures increases entropy of a system, but at low temperatures decreases entropy. O Vaporization at high temperatures decreases entropy of a system, but at low temperatures increases entropy. Part 2 (2 points) di See Periodic Table What is the vaporization point, in K, for this material? K